chore: update deno.json

https://elysiajs.com/
Reviewed-on: pinks/eris#25
Co-authored-by: pinks <lisq@cock.li>
Co-committed-by: pinks <lisq@cock.li>

.gitignore

@@ -1,3 +1,4 @@
 .env
-app*.db*
-updateConfig.ts
+*.db
+*.db-*
+deno.lock

README.md

@@ -1,5 +1,11 @@
 # Eris the Bot
 
+[![Website](https://img.shields.io/website?url=https%3A%2F%2Feris.lisq.eu%2F)](https://eris.lisq.eu/)
+![Unique users](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Feris.lisq.eu%2Fapi%2Fstats&query=%24.userCount&label=unique%20users)
+![Generated images](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Feris.lisq.eu%2Fapi%2Fstats&query=%24.imageCount&label=images%20generated)
+![Processed steps](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Feris.lisq.eu%2Fapi%2Fstats&query=%24.stepCount&label=steps%20processed)
+![Painted pixels](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Feris.lisq.eu%2Fapi%2Fstats&query=%24.pixelCount&label=pixels%20painted)
+
 Telegram bot for generating images from text.
 
 ## Requirements
@@ -13,22 +19,27 @@ You can put these in `.env` file or pass them as environment variables.
 
 - `TG_BOT_TOKEN` - Telegram bot token. Get yours from [@BotFather](https://t.me/BotFather).
   Required.
-- `TG_ADMIN_USERNAMES` - Comma separated list of usernames of users that can use admin commands.
+- `DENO_KV_PATH` - [Deno KV](https://deno.land/api?s=Deno.openKv&unstable) database file path. A
+  temporary file is used by default.
 - `LOG_LEVEL` - [Log level](https://deno.land/std@0.201.0/log/mod.ts?s=LogLevels). Default: `INFO`.
 
 ## Running
 
-- Start stable diffusion webui: `cd sd-webui`, `./webui.sh --api`
-- Start bot: `deno task start`
-
-To connect your SD to the bot, open the [Eris UI](http://localhost:5999/), login as admin and add a
-worker.
+1. Start Eris: `deno task start`
+2. Visit [Eris WebUI](http://localhost:5999/) and login via Telegram.
+3. Promote yourself to admin in the Eris WebUI.
+4. Start Stable Diffusion WebUI: `./webui.sh --api` (in SD WebUI directory)
+5. Add a new worker in the Eris WebUI.
 
 ## Codegen
 
-The Stable Diffusion API in `app/sdApi.ts` is auto-generated. To regenerate it, first start your SD
-WebUI with `--nowebui --api`, and then run:
+The Stable Diffusion API types are auto-generated. To regenerate them, first start your SD WebUI
+with `--nowebui --api`, and then run `deno task generate`
 
-```sh
-deno run npm:openapi-typescript http://localhost:7861/openapi.json -o app/sdApi.ts
-```
+## Project structure
+
+- `/api` - Eris API served at `http://localhost:5999/api/`.
+- `/app` - Queue handling and other core processes.
+- `/bot` - Handling bot commands and other updates from Telegram API.
+- `/ui` - Eris WebUI frontend files served at `http://localhost:5999/`.
+- `/util` - Utility functions shared by other parts.

api/adminsRoute.ts

@@ -0,0 +1,128 @@
+import { info } from "std/log/mod.ts";
+import { Elysia, Static, t } from "elysia";
+import { Admin, adminSchema, adminStore } from "../app/adminStore.ts";
+import { getUser, withSessionAdmin, withSessionUser } from "./getUser.ts";
+import { TkvEntry } from "../utils/Tkv.ts";
+
+const adminDataSchema = t.Intersect([adminSchema, t.Object({ tgUserId: t.Number() })]);
+
+export type AdminData = Static<typeof adminDataSchema>;
+
+function getAdminData(adminEntry: TkvEntry<["admins", number], Admin>): AdminData {
+  return { tgUserId: adminEntry.key[1], ...adminEntry.value };
+}
+
+export const adminsRoute = new Elysia()
+  .get(
+    "",
+    async () => {
+      const adminEntries = await Array.fromAsync(adminStore.list({ prefix: ["admins"] }));
+      const admins = adminEntries.map(getAdminData);
+      return admins;
+    },
+    {
+      response: t.Array(adminDataSchema),
+    },
+  )
+  .post(
+    "",
+    async ({ query, body, set }) => {
+      return withSessionAdmin({ query, set }, async (sessionUser, sessionAdminEntry) => {
+        const newAdminUser = await getUser(body.tgUserId);
+        const newAdminKey = ["admins", body.tgUserId] as const;
+        const newAdminValue = { promotedBy: sessionAdminEntry.key[1] };
+        const newAdminResult = await adminStore.atomicSet(newAdminKey, null, newAdminValue);
+        if (!newAdminResult.ok) {
+          set.status = 409;
+          return "User is already an admin";
+        }
+        info(`User ${sessionUser.first_name} promoted user ${newAdminUser.first_name} to admin`);
+        return getAdminData({ ...newAdminResult, key: newAdminKey, value: newAdminValue });
+      });
+    },
+    {
+      query: t.Object({ sessionId: t.String() }),
+      body: t.Object({
+        tgUserId: t.Number(),
+      }),
+      response: {
+        200: adminDataSchema,
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+        409: t.Literal("User is already an admin"),
+      },
+    },
+  )
+  .post(
+    "/promote_self",
+    // if there are no admins, allow any user to promote themselves
+    async ({ query, set }) => {
+      return withSessionUser({ query, set }, async (sessionUser) => {
+        const adminEntries = await Array.fromAsync(adminStore.list({ prefix: ["admins"] }));
+        if (adminEntries.length !== 0) {
+          set.status = 409;
+          return "You are not allowed to promote yourself";
+        }
+        const newAdminKey = ["admins", sessionUser.id] as const;
+        const newAdminValue = { promotedBy: null };
+        const newAdminResult = await adminStore.set(newAdminKey, newAdminValue);
+        info(`User ${sessionUser.first_name} promoted themselves to admin`);
+        return getAdminData({ ...newAdminResult, key: newAdminKey, value: newAdminValue });
+      });
+    },
+    {
+      query: t.Object({ sessionId: t.String() }),
+      response: {
+        200: adminDataSchema,
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+        409: t.Literal("You are not allowed to promote yourself"),
+      },
+    },
+  )
+  .get(
+    "/:adminId",
+    async ({ params, set }) => {
+      const adminEntry = await adminStore.get(["admins", Number(params.adminId)]);
+      if (!adminEntry.versionstamp) {
+        set.status = 404;
+        return "Admin not found";
+      }
+      return getAdminData(adminEntry);
+    },
+    {
+      params: t.Object({ adminId: t.String() }),
+      response: {
+        200: adminDataSchema,
+        404: t.Literal("Admin not found"),
+      },
+    },
+  )
+  .delete(
+    "/:adminId",
+    async ({ params, query, set }) => {
+      return withSessionAdmin({ query, set }, async (sessionUser) => {
+        const deletedAdminEntry = await adminStore.get(["admins", Number(params.adminId)]);
+        if (!deletedAdminEntry.versionstamp) {
+          set.status = 404;
+          return "Admin not found";
+        }
+        const deletedAdminUser = await getUser(deletedAdminEntry.key[1]);
+        await adminStore.delete(["admins", Number(params.adminId)]);
+        info(
+          `User ${sessionUser.first_name} demoted user ${deletedAdminUser.first_name} from admin`,
+        );
+        return null;
+      });
+    },
+    {
+      params: t.Object({ adminId: t.String() }),
+      query: t.Object({ sessionId: t.String() }),
+      response: {
+        200: t.Null(),
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+        404: t.Literal("Admin not found"),
+      },
+    },
+  );

api/botRoute.ts

@@ -0,0 +1,14 @@
+import { Elysia, t } from "elysia";
+import { bot } from "../bot/mod.ts";
+
+export const botRoute = new Elysia()
+  .get(
+    "",
+    async () => {
+      const username = bot.botInfo.username;
+      return { username };
+    },
+    {
+      response: t.Object({ username: t.String() }),
+    },
+  );

api/getUser.ts

@@ -0,0 +1,45 @@
+import { Chat } from "grammy_types";
+import { Admin, adminStore } from "../app/adminStore.ts";
+import { bot } from "../bot/mod.ts";
+import { sessions } from "./sessionsRoute.ts";
+import { TkvEntry } from "../utils/Tkv.ts";
+
+export async function withSessionUser<O>(
+  { query, set }: { query: { sessionId: string }; set: { status?: string | number } },
+  cb: (sessionUser: Chat.PrivateGetChat) => Promise<O>,
+) {
+  const session = sessions.get(query.sessionId);
+  if (!session?.userId) {
+    set.status = 401;
+    return "Must be logged in";
+  }
+  const user = await getUser(session.userId);
+  return cb(user);
+}
+
+export async function withSessionAdmin<O>(
+  { query, set }: { query: { sessionId: string }; set: { status?: string | number } },
+  cb: (
+    sessionUser: Chat.PrivateGetChat,
+    sessionAdminEntry: TkvEntry<["admins", number], Admin>,
+  ) => Promise<O>,
+) {
+  const session = sessions.get(query.sessionId);
+  if (!session?.userId) {
+    set.status = 401;
+    return "Must be logged in";
+  }
+  const sessionUser = await getUser(session.userId);
+  const sessionAdminEntry = await adminStore.get(["admins", sessionUser.id]);
+  if (!sessionAdminEntry.versionstamp) {
+    set.status = 403;
+    return "Must be an admin";
+  }
+  return cb(sessionUser, sessionAdminEntry);
+}
+
+export async function getUser(userId: number): Promise<Chat.PrivateGetChat> {
+  const chat = await bot.api.getChat(userId);
+  if (chat.type !== "private") throw new Error("Chat is not private");
+  return chat;
+}

api/jobsRoute.ts

@@ -1,15 +1,40 @@
-import { createEndpoint, createMethodFilter } from "t_rest/server";
+import { Elysia, t } from "elysia";
 import { generationQueue } from "../app/generationQueue.ts";
 
-export const jobsRoute = createMethodFilter({
-  GET: createEndpoint(
-    { query: null, body: null },
-    async () => ({
-      status: 200,
-      body: {
-        type: "application/json",
-        data: await generationQueue.getAllJobs(),
+export const jobsRoute = new Elysia()
+  .get(
+    "",
+    async () => {
+      const allJobs = await generationQueue.getAllJobs();
+      return allJobs.map((job) => ({
+        id: job.id.join(":"),
+        place: job.place,
+        state: {
+          from: {
+            language_code: job.state.from.language_code ?? null,
+            first_name: job.state.from.first_name,
+            last_name: job.state.from.last_name ?? null,
+            username: job.state.from.username ?? null,
           },
+          progress: job.state.progress ?? null,
+          workerInstanceKey: job.state.workerInstanceKey ?? null,
+        },
+      }));
+    },
+    {
+      response: t.Array(t.Object({
+        id: t.String(),
+        place: t.Number(),
+        state: t.Object({
+          from: t.Object({
+            language_code: t.Nullable(t.String()),
+            first_name: t.String(),
+            last_name: t.Nullable(t.String()),
+            username: t.Nullable(t.String()),
           }),
-  ),
-});
+          progress: t.Nullable(t.Number()),
+          workerInstanceKey: t.Nullable(t.String()),
+        }),
+      })),
+    },
+  );

api/mod.ts

@@ -1,12 +1,12 @@
 import { route } from "reroute";
 import { serveSpa } from "serve_spa";
-import { serveApi } from "./serveApi.ts";
-import { fromFileUrl } from "std/path/mod.ts"
+import { api } from "./serveApi.ts";
+import { fromFileUrl } from "std/path/mod.ts";
 
 export async function serveUi() {
   const server = Deno.serve({ port: 5999 }, (request) =>
     route(request, {
-      "/api/*": (request) => serveApi(request),
+      "/api/*": (request) => api.fetch(request),
       "/*": (request) =>
         serveSpa(request, {
           fsRoot: fromFileUrl(new URL("../ui/", import.meta.url)),

api/paramsRoute.ts

@@ -1,45 +1,39 @@
-import { deepMerge } from "std/collections/deep_merge.ts";
+import { Elysia, t } from "elysia";
 import { info } from "std/log/mod.ts";
-import { createEndpoint, createMethodFilter } from "t_rest/server";
-import { configSchema, getConfig, setConfig } from "../app/config.ts";
-import { bot } from "../bot/mod.ts";
-import { sessions } from "./sessionsRoute.ts";
+import { defaultParamsSchema, getConfig, setConfig } from "../app/config.ts";
+import { withSessionAdmin } from "./getUser.ts";
 
-export const paramsRoute = createMethodFilter({
-  GET: createEndpoint(
-    { query: null, body: null },
+export const paramsRoute = new Elysia()
+  .get(
+    "",
     async () => {
       const config = await getConfig();
-      return { status: 200, body: { type: "application/json", data: config.defaultParams } };
+      return config.defaultParams;
     },
-  ),
-
-  PATCH: createEndpoint(
     {
-      query: { sessionId: { type: "string" } },
-      body: {
-        type: "application/json",
-        schema: configSchema.properties.defaultParams,
+      response: {
+        200: defaultParamsSchema,
       },
     },
-    async ({ query, body }) => {
-      const session = sessions.get(query.sessionId);
-      if (!session?.userId) {
-        return { status: 401, body: { type: "text/plain", data: "Must be logged in" } };
-      }
-      const chat = await bot.api.getChat(session.userId);
-      if (chat.type !== "private") throw new Error("Chat is not private");
-      if (!chat.username) {
-        return { status: 403, body: { type: "text/plain", data: "Must have a username" } };
-      }
+  )
+  .patch(
+    "",
+    async ({ query, body, set }) => {
+      return withSessionAdmin({ query, set }, async (user) => {
         const config = await getConfig();
-      if (!config?.adminUsernames?.includes(chat.username)) {
-        return { status: 403, body: { type: "text/plain", data: "Must be an admin" } };
-      }
-      info(`User ${chat.username} updated default params: ${JSON.stringify(body.data)}`);
-      const defaultParams = deepMerge(config.defaultParams ?? {}, body.data);
+        info(`User ${user.first_name} updated default params: ${JSON.stringify(body)}`);
+        const defaultParams = { ...config.defaultParams, ...body };
         await setConfig({ defaultParams });
-      return { status: 200, body: { type: "application/json", data: config.defaultParams } };
+        return config.defaultParams;
+      });
     },
-  ),
-});
+    {
+      query: t.Object({ sessionId: t.String() }),
+      body: defaultParamsSchema,
+      response: {
+        200: defaultParamsSchema,
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+      },
+    },
+  );

api/serveApi.ts

@@ -1,34 +1,32 @@
-import {
-  createEndpoint,
-  createLoggerMiddleware,
-  createMethodFilter,
-  createPathFilter,
-} from "t_rest/server";
+import { Elysia } from "elysia";
+import { swagger } from "elysia/swagger";
+import { adminsRoute } from "./adminsRoute.ts";
+import { botRoute } from "./botRoute.ts";
 import { jobsRoute } from "./jobsRoute.ts";
 import { paramsRoute } from "./paramsRoute.ts";
 import { sessionsRoute } from "./sessionsRoute.ts";
 import { statsRoute } from "./statsRoute.ts";
 import { usersRoute } from "./usersRoute.ts";
 import { workersRoute } from "./workersRoute.ts";
-import { bot } from "../bot/mod.ts";
 
-export const serveApi = createLoggerMiddleware(
-  createPathFilter({
-    "jobs": jobsRoute,
-    "sessions": sessionsRoute,
-    "users": usersRoute,
-    "settings/params": paramsRoute,
-    "stats": statsRoute,
-    "workers": workersRoute,
-    "bot": createMethodFilter({
-      // deno-lint-ignore require-await
-      GET: createEndpoint({ query: null, body: null }, async () => {
-        const username = bot.botInfo.username;
-        return { status: 200, body: { type: "application/json", data: { username } } };
+export const api = new Elysia()
+  .use(
+    swagger({
+      path: "/docs",
+      swaggerOptions: { url: "docs/json" } as never,
+      documentation: {
+        info: { title: "Eris API", version: "0.1" },
+        servers: [{ url: "/api" }],
+      },
     }),
-    }),
-  }),
-  { filterStatus: (status) => status >= 400 },
-);
+  )
+  .group("/admins", (api) => api.use(adminsRoute))
+  .group("/bot", (api) => api.use(botRoute))
+  .group("/jobs", (api) => api.use(jobsRoute))
+  .group("/sessions", (api) => api.use(sessionsRoute))
+  .group("/settings/params", (api) => api.use(paramsRoute))
+  .group("/stats", (api) => api.use(statsRoute))
+  .group("/users", (api) => api.use(usersRoute))
+  .group("/workers", (api) => api.use(workersRoute));
 
-export type ApiHandler = typeof serveApi;
+export type Api = typeof api;

api/sessionsRoute.ts

@@ -1,37 +1,43 @@
-// deno-lint-ignore-file require-await
-import { createEndpoint, createMethodFilter, createPathFilter } from "t_rest/server";
+import { Elysia, NotFoundError, t } from "elysia";
 import { ulid } from "ulid";
 
 export const sessions = new Map<string, Session>();
 
 export interface Session {
-  userId?: number;
+  userId?: number | undefined;
 }
 
-export const sessionsRoute = createPathFilter({
-  "": createMethodFilter({
-    POST: createEndpoint(
-      { query: null, body: null },
+export const sessionsRoute = new Elysia()
+  .post(
+    "",
     async () => {
       const id = ulid();
       const session: Session = {};
       sessions.set(id, session);
-        return { status: 200, body: { type: "application/json", data: { id, ...session } } };
+      return { id, userId: session.userId ?? null };
     },
-    ),
+    {
+      response: t.Object({
+        id: t.String(),
+        userId: t.Nullable(t.Number()),
       }),
-
-  "{sessionId}": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+    },
+  )
+  .get(
+    "/:sessionId",
     async ({ params }) => {
-        const id = params.sessionId;
+      const id = params.sessionId!;
       const session = sessions.get(id);
       if (!session) {
-          return { status: 401, body: { type: "text/plain", data: "Session not found" } };
+        throw new NotFoundError("Session not found");
       }
-        return { status: 200, body: { type: "application/json", data: { id, ...session } } };
+      return { id, userId: session.userId ?? null };
     },
-    ),
+    {
+      params: t.Object({ sessionId: t.String() }),
+      response: t.Object({
+        id: t.String(),
+        userId: t.Nullable(t.Number()),
       }),
-});
+    },
+  );

api/statsRoute.ts

@@ -1,17 +1,17 @@
-import { createEndpoint, createMethodFilter, createPathFilter } from "t_rest/server";
-import { globalStats } from "../app/globalStats.ts";
-import { getDailyStats } from "../app/dailyStatsStore.ts";
-import { getUserStats } from "../app/userStatsStore.ts";
-import { getUserDailyStats } from "../app/userDailyStatsStore.ts";
-import { generationStore } from "../app/generationStore.ts";
+import { Elysia, t } from "elysia";
 import { subMinutes } from "date-fns";
+import { dailyStatsSchema, getDailyStats } from "../app/dailyStatsStore.ts";
+import { generationStore } from "../app/generationStore.ts";
+import { globalStats } from "../app/globalStats.ts";
+import { getUserDailyStats, userDailyStatsSchema } from "../app/userDailyStatsStore.ts";
+import { getUserStats, userStatsSchema } from "../app/userStatsStore.ts";
+import { withSessionAdmin } from "./getUser.ts";
 
 const STATS_INTERVAL_MIN = 3;
 
-export const statsRoute = createPathFilter({
-  "": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+export const statsRoute = new Elysia()
+  .get(
+    "",
     async () => {
       const after = subMinutes(new Date(), STATS_INTERVAL_MIN);
       const generations = await generationStore.getAll({ after });
@@ -36,10 +36,6 @@ export const statsRoute = createPathFilter({
         .reduce((sum, pixelSteps) => sum + pixelSteps, 0) / STATS_INTERVAL_MIN;
 
       return {
-          status: 200,
-          body: {
-            type: "application/json",
-            data: {
         imageCount: globalStats.imageCount,
         stepCount: globalStats.stepCount,
         pixelCount: globalStats.pixelCount,
@@ -49,77 +45,90 @@ export const statsRoute = createPathFilter({
         stepsPerMinute,
         pixelsPerMinute,
         pixelStepsPerMinute,
-            },
-          },
       };
     },
-    ),
+    {
+      response: {
+        200: t.Object({
+          imageCount: t.Number(),
+          stepCount: t.Number(),
+          pixelCount: t.Number(),
+          pixelStepCount: t.Number(),
+          userCount: t.Number(),
+          imagesPerMinute: t.Number(),
+          stepsPerMinute: t.Number(),
+          pixelsPerMinute: t.Number(),
+          pixelStepsPerMinute: t.Number(),
         }),
-  "daily/{year}/{month}/{day}": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+      },
+    },
+  )
+  .get(
+    "/daily/:year/:month/:day",
     async ({ params }) => {
-        const year = Number(params.year);
-        const month = Number(params.month);
-        const day = Number(params.day);
-        const stats = await getDailyStats(year, month, day);
-        return {
-          status: 200,
-          body: {
-            type: "application/json",
-            data: {
-              imageCount: stats.imageCount,
-              pixelCount: stats.pixelCount,
-              userCount: stats.userIds.length,
-              timestamp: stats.timestamp,
+      return getDailyStats(params.year, params.month, params.day);
     },
-          },
-        };
-      },
-    ),
+    {
+      params: t.Object({
+        year: t.Number(),
+        month: t.Number(),
+        day: t.Number(),
       }),
-  "users/{userId}": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+      response: {
+        200: dailyStatsSchema,
+      },
+    },
+  )
+  .get(
+    "/users/:userId",
     async ({ params }) => {
-        const userId = Number(params.userId);
-        const stats = await getUserStats(userId);
+      const userId = params.userId;
+      // deno-lint-ignore no-unused-vars
+      const { tagCountMap, ...stats } = await getUserStats(userId);
+      return stats;
+    },
+    {
+      params: t.Object({ userId: t.Number() }),
+      response: {
+        200: t.Omit(userStatsSchema, ["tagCountMap"]),
+      },
+    },
+  )
+  .get(
+    "/users/:userId/tagcount",
+    async ({ params, query, set }) => {
+      return withSessionAdmin({ query, set }, async () => {
+        const stats = await getUserStats(params.userId);
         return {
-          status: 200,
-          body: {
-            type: "application/json",
-            data: {
-              imageCount: stats.imageCount,
-              pixelCount: stats.pixelCount,
           tagCountMap: stats.tagCountMap,
           timestamp: stats.timestamp,
-            },
-          },
         };
+      });
     },
-    ),
-  }),
-  "users/{userId}/daily/{year}/{month}/{day}": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+    {
+      params: t.Object({ userId: t.Number() }),
+      query: t.Object({ sessionId: t.String() }),
+      response: {
+        200: t.Pick(userStatsSchema, ["tagCountMap", "timestamp"]),
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+      },
+    },
+  )
+  .get(
+    "/users/:userId/daily/:year/:month/:day",
     async ({ params }) => {
-        const userId = Number(params.userId);
-        const year = Number(params.year);
-        const month = Number(params.month);
-        const day = Number(params.day);
-        const stats = await getUserDailyStats(userId, year, month, day);
-        return {
-          status: 200,
-          body: {
-            type: "application/json",
-            data: {
-              imageCount: stats.imageCount,
-              pixelCount: stats.pixelCount,
-              timestamp: stats.timestamp,
+      return getUserDailyStats(params.userId, params.year, params.month, params.day);
     },
-          },
-        };
-      },
-    ),
+    {
+      params: t.Object({
+        userId: t.Number(),
+        year: t.Number(),
+        month: t.Number(),
+        day: t.Number(),
       }),
-});
+      response: {
+        200: userDailyStatsSchema,
+      },
+    },
+  );

api/usersRoute.ts

@@ -1,55 +1,55 @@
-import { createEndpoint, createMethodFilter, createPathFilter } from "t_rest/server";
-import { getConfig } from "../app/config.ts";
+import { Elysia, t } from "elysia";
+import { adminSchema, adminStore } from "../app/adminStore.ts";
 import { bot } from "../bot/mod.ts";
+import { getUser } from "./getUser.ts";
 
-export const usersRoute = createPathFilter({
-  "{userId}/photo": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+export const usersRoute = new Elysia()
+  .get(
+    "/:userId/photo",
     async ({ params }) => {
-        const chat = await bot.api.getChat(params.userId);
-        if (chat.type !== "private") {
-          throw new Error("Chat is not private");
+      const user = await getUser(Number(params.userId));
+      if (!user.photo) {
+        throw new Error("User has no photo");
       }
-        const photoData = chat.photo?.small_file_id
-          ? await fetch(
-            `https://api.telegram.org/file/bot${bot.token}/${await bot.api.getFile(
-              chat.photo.small_file_id,
-            ).then((file) => file.file_path)}`,
-          ).then((resp) => resp.arrayBuffer())
-          : undefined;
-        if (!photoData) {
-          return { status: 404, body: { type: "text/plain", data: "User has no photo" } };
+      const photoFile = await bot.api.getFile(user.photo.small_file_id);
+      const photoData = await fetch(
+        `https://api.telegram.org/file/bot${bot.token}/${photoFile.file_path}`,
+      ).then((resp) => {
+        if (!resp.ok) {
+          throw new Error("Failed to fetch photo");
         }
-        return {
-          status: 200,
-          body: {
-            type: "image/jpeg",
-            data: new Blob([photoData], { type: "image/jpeg" }),
+        return resp;
+      }).then((resp) => resp.arrayBuffer());
+
+      return new Response(new File([photoData], "avatar.jpg", { type: "image/jpeg" }));
     },
+    {
+      params: t.Object({ userId: t.String() }),
+    },
+  )
+  .get(
+    "/:userId",
+    async ({ params }) => {
+      const user = await getUser(Number(params.userId));
+      const adminEntry = await adminStore.get(["admins", user.id]);
+      return {
+        id: user.id,
+        first_name: user.first_name,
+        last_name: user.last_name ?? null,
+        username: user.username ?? null,
+        bio: user.bio ?? null,
+        admin: adminEntry.value ?? null,
       };
     },
-    ),
+    {
+      params: t.Object({ userId: t.String() }),
+      response: t.Object({
+        id: t.Number(),
+        first_name: t.String(),
+        last_name: t.Nullable(t.String()),
+        username: t.Nullable(t.String()),
+        bio: t.Nullable(t.String()),
+        admin: t.Nullable(adminSchema),
       }),
-
-  "{userId}": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
-      async ({ params }) => {
-        const chat = await bot.api.getChat(params.userId);
-        if (chat.type !== "private") {
-          throw new Error("Chat is not private");
-        }
-        const config = await getConfig();
-        const isAdmin = chat.username && config?.adminUsernames?.includes(chat.username);
-        return {
-          status: 200,
-          body: {
-            type: "application/json",
-            data: { ...chat, isAdmin },
     },
-        };
-      },
-    ),
-  }),
-});
+  );

api/workersRoute.ts

@@ -2,28 +2,38 @@ import { subMinutes } from "date-fns";
 import { Model } from "indexed_kv";
 import createOpenApiFetch from "openapi_fetch";
 import { info } from "std/log/mod.ts";
-import { createEndpoint, createMethodFilter, createPathFilter } from "t_rest/server";
-import { getConfig } from "../app/config.ts";
+import { Elysia, NotFoundError, Static, t } from "elysia";
 import { activeGenerationWorkers } from "../app/generationQueue.ts";
 import { generationStore } from "../app/generationStore.ts";
 import * as SdApi from "../app/sdApi.ts";
-import { WorkerInstance, workerInstanceStore } from "../app/workerInstanceStore.ts";
-import { bot } from "../bot/mod.ts";
+import {
+  WorkerInstance,
+  workerInstanceSchema,
+  workerInstanceStore,
+} from "../app/workerInstanceStore.ts";
 import { getAuthHeader } from "../utils/getAuthHeader.ts";
-import { sessions } from "./sessionsRoute.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
+import { withSessionAdmin } from "./getUser.ts";
 
-export type WorkerData = Omit<WorkerInstance, "sdUrl" | "sdAuth"> & {
-  id: string;
-  isActive: boolean;
-  imagesPerMinute: number;
-  stepsPerMinute: number;
-  pixelsPerMinute: number;
-  pixelStepsPerMinute: number;
-};
+const workerResponseSchema = t.Intersect([
+  t.Object({ id: t.String() }),
+  t.Omit(workerInstanceSchema, ["sdUrl", "sdAuth"]),
+  t.Object({
+    isActive: t.Boolean(),
+    imagesPerMinute: t.Number(),
+    stepsPerMinute: t.Number(),
+    pixelsPerMinute: t.Number(),
+    pixelStepsPerMinute: t.Number(),
+  }),
+]);
+
+export type WorkerResponse = Static<typeof workerResponseSchema>;
+
+const workerRequestSchema = t.Omit(workerInstanceSchema, ["lastOnlineTime", "lastError"]);
 
 const STATS_INTERVAL_MIN = 10;
 
-async function getWorkerData(workerInstance: Model<WorkerInstance>): Promise<WorkerData> {
+async function getWorkerResponse(workerInstance: Model<WorkerInstance>): Promise<WorkerResponse> {
   const after = subMinutes(new Date(), STATS_INTERVAL_MIN);
 
   const generations = await generationStore.getBy("workerInstanceKey", {
@@ -48,7 +58,7 @@ async function getWorkerData(workerInstance: Model<WorkerInstance>): Promise<Wor
     )
     .reduce((sum, pixelSteps) => sum + pixelSteps, 0) / STATS_INTERVAL_MIN;
 
-  return {
+  return omitUndef({
     id: workerInstance.id,
     key: workerInstance.value.key,
     name: workerInstance.value.name,
@@ -59,197 +69,113 @@ async function getWorkerData(workerInstance: Model<WorkerInstance>): Promise<Wor
     stepsPerMinute,
     pixelsPerMinute,
     pixelStepsPerMinute,
-  };
+  });
 }
 
-export const workersRoute = createPathFilter({
-  "": createMethodFilter({
-    GET: createEndpoint(
-      { query: null, body: null },
+export const workersRoute = new Elysia()
+  .get(
+    "",
     async () => {
       const workerInstances = await workerInstanceStore.getAll();
-        const workers = await Promise.all(workerInstances.map(getWorkerData));
-
-        return {
-          status: 200,
-          body: { type: "application/json", data: workers satisfies WorkerData[] },
-        };
+      const workers = await Promise.all(workerInstances.map(getWorkerResponse));
+      return workers;
     },
-    ),
-    POST: createEndpoint(
     {
-        query: {
-          sessionId: { type: "string" },
+      response: t.Array(workerResponseSchema),
     },
-        body: {
-          type: "application/json",
-          schema: {
-            type: "object",
-            properties: {
-              key: { type: "string" },
-              name: { type: ["string", "null"] },
-              sdUrl: { type: "string" },
-              sdAuth: {
-                type: ["object", "null"],
-                properties: {
-                  user: { type: "string" },
-                  password: { type: "string" },
-                },
-                required: ["user", "password"],
-              },
-            },
-            required: ["key", "name", "sdUrl", "sdAuth"],
-          },
-        },
-      },
-      async ({ query, body }) => {
-        const session = sessions.get(query.sessionId);
-        if (!session?.userId) {
-          return { status: 401, body: { type: "text/plain", data: "Must be logged in" } };
-        }
-        const chat = await bot.api.getChat(session.userId);
-        if (chat.type !== "private") throw new Error("Chat is not private");
-        if (!chat.username) {
-          return { status: 403, body: { type: "text/plain", data: "Must have a username" } };
-        }
-        const config = await getConfig();
-        if (!config?.adminUsernames?.includes(chat.username)) {
-          return { status: 403, body: { type: "text/plain", data: "Must be an admin" } };
-        }
-        const workerInstance = await workerInstanceStore.create({
-          key: body.data.key,
-          name: body.data.name,
-          sdUrl: body.data.sdUrl,
-          sdAuth: body.data.sdAuth,
+  )
+  .post(
+    "",
+    async ({ query, body, set }) => {
+      return withSessionAdmin({ query, set }, async (sessionUser) => {
+        const workerInstance = await workerInstanceStore.create(body);
+        info(`User ${sessionUser.first_name} created worker ${workerInstance.value.name}`);
+        return await getWorkerResponse(workerInstance);
       });
-        info(`User ${chat.username} created worker ${workerInstance.id}`);
-        const worker = await getWorkerData(workerInstance);
-        return {
-          status: 200,
-          body: { type: "application/json", data: worker satisfies WorkerData },
-        };
     },
-    ),
-  }),
-
-  "{workerId}": createPathFilter({
-    "": createMethodFilter({
-      GET: createEndpoint(
-        { query: null, body: null },
+    {
+      query: t.Object({ sessionId: t.String() }),
+      body: workerRequestSchema,
+      response: {
+        200: workerResponseSchema,
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+      },
+    },
+  )
+  .get(
+    "/:workerId",
     async ({ params }) => {
       const workerInstance = await workerInstanceStore.getById(params.workerId);
       if (!workerInstance) {
-            return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
+        throw new NotFoundError("Worker not found");
       }
-          const worker: WorkerData = await getWorkerData(workerInstance);
-          return {
-            status: 200,
-            body: { type: "application/json", data: worker satisfies WorkerData },
-          };
+      return await getWorkerResponse(workerInstance);
     },
-      ),
-      PATCH: createEndpoint(
     {
-          query: {
-            sessionId: { type: "string" },
-          },
-          body: {
-            type: "application/json",
-            schema: {
-              type: "object",
-              properties: {
-                key: { type: "string" },
-                name: { type: ["string", "null"] },
-                sdUrl: { type: "string" },
-                auth: {
-                  type: ["object", "null"],
-                  properties: {
-                    user: { type: "string" },
-                    password: { type: "string" },
-                  },
-                  required: ["user", "password"],
+      params: t.Object({ workerId: t.String() }),
+      response: {
+        200: workerResponseSchema,
       },
     },
-            },
-          },
-        },
-        async ({ params, query, body }) => {
+  )
+  .patch(
+    "/:workerId",
+    async ({ params, query, body, set }) => {
       const workerInstance = await workerInstanceStore.getById(params.workerId);
       if (!workerInstance) {
-            return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
-          }
-          const session = sessions.get(query.sessionId);
-          if (!session?.userId) {
-            return { status: 401, body: { type: "text/plain", data: "Must be logged in" } };
-          }
-          const chat = await bot.api.getChat(session.userId);
-          if (chat.type !== "private") throw new Error("Chat is not private");
-          if (!chat.username) {
-            return { status: 403, body: { type: "text/plain", data: "Must have a username" } };
-          }
-          const config = await getConfig();
-          if (!config?.adminUsernames?.includes(chat.username)) {
-            return { status: 403, body: { type: "text/plain", data: "Must be an admin" } };
-          }
-          if (body.data.name !== undefined) {
-            workerInstance.value.name = body.data.name;
-          }
-          if (body.data.sdUrl !== undefined) {
-            workerInstance.value.sdUrl = body.data.sdUrl;
-          }
-          if (body.data.auth !== undefined) {
-            workerInstance.value.sdAuth = body.data.auth;
+        throw new NotFoundError("Worker not found");
       }
+      return withSessionAdmin({ query, set }, async (sessionUser) => {
         info(
-            `User ${chat.username} updated worker ${params.workerId}: ${JSON.stringify(body.data)}`,
+          `User ${sessionUser.first_name} updated worker ${workerInstance.value.name}: ${
+            JSON.stringify(body)
+          }`,
         );
-          await workerInstance.update();
-          const worker = await getWorkerData(workerInstance);
-          return {
-            status: 200,
-            body: { type: "application/json", data: worker satisfies WorkerData },
-          };
+        await workerInstance.update(body);
+        return await getWorkerResponse(workerInstance);
+      });
     },
-      ),
-      DELETE: createEndpoint(
     {
-          query: {
-            sessionId: { type: "string" },
+      params: t.Object({ workerId: t.String() }),
+      query: t.Object({ sessionId: t.String() }),
+      body: t.Partial(workerRequestSchema),
+      response: {
+        200: workerResponseSchema,
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
       },
-          body: null,
     },
-        async ({ params, query }) => {
+  )
+  .delete(
+    "/:workerId",
+    async ({ params, query, set }) => {
       const workerInstance = await workerInstanceStore.getById(params.workerId);
       if (!workerInstance) {
-            return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
+        throw new Error("Worker not found");
       }
-          const session = sessions.get(query.sessionId);
-          if (!session?.userId) {
-            return { status: 401, body: { type: "text/plain", data: "Must be logged in" } };
-          }
-          const chat = await bot.api.getChat(session.userId);
-          if (chat.type !== "private") throw new Error("Chat is not private");
-          if (!chat.username) {
-            return { status: 403, body: { type: "text/plain", data: "Must have a username" } };
-          }
-          const config = await getConfig();
-          if (!config?.adminUsernames?.includes(chat.username)) {
-            return { status: 403, body: { type: "text/plain", data: "Must be an admin" } };
-          }
-          info(`User ${chat.username} deleted worker ${params.workerId}`);
+      return withSessionAdmin({ query, set }, async (sessionUser) => {
+        info(`User ${sessionUser.first_name} deleted worker ${workerInstance.value.name}`);
         await workerInstance.delete();
-          return { status: 200, body: { type: "application/json", data: null } };
+        return null;
+      });
     },
-      ),
-    }),
-
-    "loras": createMethodFilter({
-      GET: createEndpoint(
-        { query: null, body: null },
+    {
+      params: t.Object({ workerId: t.String() }),
+      query: t.Object({ sessionId: t.String() }),
+      response: {
+        200: t.Null(),
+        401: t.Literal("Must be logged in"),
+        403: t.Literal("Must be an admin"),
+      },
+    },
+  )
+  .get(
+    "/:workerId/loras",
     async ({ params }) => {
       const workerInstance = await workerInstanceStore.getById(params.workerId);
       if (!workerInstance) {
-            return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
+        throw new NotFoundError("Worker not found");
       }
       const sdClient = createOpenApiFetch<SdApi.paths>({
         baseUrl: workerInstance.value.sdUrl,
@@ -257,30 +183,32 @@ export const workersRoute = createPathFilter({
       });
       const lorasResponse = await sdClient.GET("/sdapi/v1/loras", {});
       if (lorasResponse.error) {
-            return {
-              status: 500,
-              body: { type: "text/plain", data: `Loras request failed: ${lorasResponse["error"]}` },
-            };
+        throw new Error(
+          `Loras request failed: ${lorasResponse["error"]}`,
+        );
       }
       const loras = (lorasResponse.data as Lora[]).map((lora) => ({
         name: lora.name,
         alias: lora.alias ?? null,
       }));
-          return {
-            status: 200,
-            body: { type: "application/json", data: loras },
-          };
+      return loras;
     },
-      ),
+    {
+      params: t.Object({ workerId: t.String() }),
+      response: t.Array(
+        t.Object({
+          name: t.String(),
+          alias: t.Nullable(t.String()),
         }),
-
-    "models": createMethodFilter({
-      GET: createEndpoint(
-        { query: null, body: null },
+      ),
+    },
+  )
+  .get(
+    "/:workerId/models",
     async ({ params }) => {
       const workerInstance = await workerInstanceStore.getById(params.workerId);
       if (!workerInstance) {
-            return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
+        throw new NotFoundError("Worker not found");
       }
       const sdClient = createOpenApiFetch<SdApi.paths>({
         baseUrl: workerInstance.value.sdUrl,
@@ -288,29 +216,30 @@ export const workersRoute = createPathFilter({
       });
       const modelsResponse = await sdClient.GET("/sdapi/v1/sd-models", {});
       if (modelsResponse.error) {
-            return {
-              status: 500,
-              body: {
-                type: "text/plain",
-                data: `Models request failed: ${modelsResponse["error"]}`,
-              },
-            };
+        throw new Error(
+          `Models request failed: ${modelsResponse["error"]}`,
+        );
       }
       const models = modelsResponse.data.map((model) => ({
         title: model.title,
         modelName: model.model_name,
-            hash: model.hash,
-            sha256: model.sha256,
+        hash: model.hash ?? null,
+        sha256: model.sha256 ?? null,
       }));
-          return {
-            status: 200,
-            body: { type: "application/json", data: models },
-          };
+      return models;
     },
+    {
+      params: t.Object({ workerId: t.String() }),
+      response: t.Array(
+        t.Object({
+          title: t.String(),
+          modelName: t.String(),
+          hash: t.Nullable(t.String()),
+          sha256: t.Nullable(t.String()),
+        }),
       ),
-    }),
-  }),
-});
+    },
+  );
 
 export interface Lora {
   name: string;

app/adminStore.ts

@@ -0,0 +1,11 @@
+import { Static, t } from "elysia";
+import { db } from "./db.ts";
+import { Tkv } from "../utils/Tkv.ts";
+
+export const adminSchema = t.Object({
+  promotedBy: t.Nullable(t.Number()),
+});
+
+export type Admin = Static<typeof adminSchema>;
+
+export const adminStore = new Tkv<["admins", number], Admin>(db);

app/config.ts

@@ -1,52 +1,45 @@
+import { Static, t } from "elysia";
+import { Tkv } from "../utils/Tkv.ts";
 import { db } from "./db.ts";
-import { JsonSchema, jsonType } from "t_rest/server";
 
-export const configSchema = {
-  type: "object",
-  properties: {
-    adminUsernames: { type: "array", items: { type: "string" } },
-    pausedReason: { type: ["string", "null"] },
-    maxUserJobs: { type: "number" },
-    maxJobs: { type: "number" },
-    defaultParams: {
-      type: "object",
-      properties: {
-        batch_size: { type: "number" },
-        n_iter: { type: "number" },
-        width: { type: "number" },
-        height: { type: "number" },
-        steps: { type: "number" },
-        cfg_scale: { type: "number" },
-        sampler_name: { type: "string" },
-        negative_prompt: { type: "string" },
-      },
-    },
-  },
-  required: ["adminUsernames", "maxUserJobs", "maxJobs", "defaultParams"],
-} as const satisfies JsonSchema;
+export const defaultParamsSchema = t.Partial(t.Object({
+  batch_size: t.Number(),
+  n_iter: t.Number(),
+  width: t.Number(),
+  height: t.Number(),
+  steps: t.Number(),
+  cfg_scale: t.Number(),
+  sampler_name: t.String(),
+  negative_prompt: t.String(),
+}));
 
-export type Config = jsonType<typeof configSchema>;
+export type DefaultParams = Static<typeof defaultParamsSchema>;
+
+export const configSchema = t.Object({
+  pausedReason: t.Nullable(t.String()),
+  maxUserJobs: t.Number(),
+  maxJobs: t.Number(),
+  defaultParams: defaultParamsSchema,
+});
+
+export type Config = Static<typeof configSchema>;
+
+export const configStore = new Tkv<["config"], Config>(db);
+
+const defaultConfig: Config = {
+  pausedReason: null,
+  maxUserJobs: Infinity,
+  maxJobs: Infinity,
+  defaultParams: {},
+};
 
 export async function getConfig(): Promise<Config> {
-  const configEntry = await db.get<Config>(["config"]);
-  const config = configEntry?.value;
-  return {
-    adminUsernames: config?.adminUsernames ?? Deno.env.get("TG_ADMIN_USERNAMES")?.split(",") ?? [],
-    pausedReason: config?.pausedReason ?? null,
-    maxUserJobs: config?.maxUserJobs ?? Infinity,
-    maxJobs: config?.maxJobs ?? Infinity,
-    defaultParams: config?.defaultParams ?? {},
-  };
+  const configEntry = await configStore.get(["config"]);
+  return { ...defaultConfig, ...configEntry.value };
 }
 
-export async function setConfig(newConfig: Partial<Config>): Promise<void> {
-  const oldConfig = await getConfig();
-  const config: Config = {
-    adminUsernames: newConfig.adminUsernames ?? oldConfig.adminUsernames,
-    pausedReason: newConfig.pausedReason ?? oldConfig.pausedReason,
-    maxUserJobs: newConfig.maxUserJobs ?? oldConfig.maxUserJobs,
-    maxJobs: newConfig.maxJobs ?? oldConfig.maxJobs,
-    defaultParams: newConfig.defaultParams ?? oldConfig.defaultParams,
-  };
-  await db.set(["config"], config);
+export async function setConfig<K extends keyof Config>(newConfig: Pick<Config, K>): Promise<void> {
+  const configEntry = await configStore.get(["config"]);
+  const config = { ...defaultConfig, ...configEntry.value, ...newConfig };
+  await configStore.atomicSet(["config"], configEntry.versionstamp, config);
 }

app/dailyStatsStore.ts

@@ -1,25 +1,21 @@
-import { UTCDateMini } from "@date-fns/utc";
 import { hoursToMilliseconds, isSameDay, minutesToMilliseconds } from "date-fns";
+import { UTCDateMini } from "date-fns/utc";
+import { Static, t } from "elysia";
 import { info } from "std/log/mod.ts";
-import { JsonSchema, jsonType } from "t_rest/server";
 import { db } from "./db.ts";
 import { generationStore } from "./generationStore.ts";
-import { kvMemoize } from "./kvMemoize.ts";
+import { kvMemoize } from "../utils/kvMemoize.ts";
 
-export const dailyStatsSchema = {
-  type: "object",
-  properties: {
-    userIds: { type: "array", items: { type: "number" } },
-    imageCount: { type: "number" },
-    stepCount: { type: "number" },
-    pixelCount: { type: "number" },
-    pixelStepCount: { type: "number" },
-    timestamp: { type: "number" },
-  },
-  required: ["userIds", "imageCount", "stepCount", "pixelCount", "pixelStepCount", "timestamp"],
-} as const satisfies JsonSchema;
+export const dailyStatsSchema = t.Object({
+  userIds: t.Array(t.Number()),
+  imageCount: t.Number(),
+  stepCount: t.Number(),
+  pixelCount: t.Number(),
+  pixelStepCount: t.Number(),
+  timestamp: t.Number(),
+});
 
-export type DailyStats = jsonType<typeof dailyStatsSchema>;
+export type DailyStats = Static<typeof dailyStatsSchema>;
 
 export const getDailyStats = kvMemoize(
   db,

app/db.ts

@@ -1,4 +1,4 @@
 import { KvFs } from "kvfs";
 
-export const db = await Deno.openKv("./app.db");
+export const db = await Deno.openKv(Deno.env.get("DENO_KV_PATH"));
 export const fs = new KvFs(db);

app/generationQueue.ts

@@ -11,6 +11,7 @@ import { PngInfo } from "../bot/parsePngInfo.ts";
 import { formatOrdinal } from "../utils/formatOrdinal.ts";
 import { formatUserChat } from "../utils/formatUserChat.ts";
 import { getAuthHeader } from "../utils/getAuthHeader.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
 import { SdError } from "./SdError.ts";
 import { getConfig } from "./config.ts";
 import { db, fs } from "./db.ts";
@@ -45,7 +46,7 @@ export const activeGenerationWorkers = new Map<string, Worker<GenerationJob>>();
 /**
  * Initializes queue workers for each SD instance when they become online.
  */
-export async function processGenerationQueue() {
+export async function processGenerationQueue(): Promise<never> {
   while (true) {
     for await (const workerInstance of workerInstanceStore.listAll()) {
       const activeWorker = activeGenerationWorkers.get(workerInstance.id);
@@ -69,7 +70,8 @@ export async function processGenerationQueue() {
           return response;
         })
         .catch((error) => {
-          workerInstance.update({ lastError: { message: error.message, time: Date.now() } })
+          const cleanedErrorMessage = error.message.replace(/url \([^)]+\)/, "");
+          workerInstance.update({ lastError: { message: cleanedErrorMessage, time: Date.now() } })
             .catch(() => undefined);
           debug(`Worker ${workerInstance.value.key} is down: ${error}`);
         });
@@ -140,15 +142,6 @@ async function processGenerationJob(
   debug(`Generation started for ${formatUserChat(state)}`);
   await updateJob({ state: state });
 
-  // check if bot can post messages in this chat
-  const chat = await bot.api.getChat(state.chat.id);
-  if (
-    (chat.type === "group" || chat.type === "supergroup") &&
-    (!chat.permissions?.can_send_messages || !chat.permissions?.can_send_photos)
-  ) {
-    throw new Error("Bot doesn't have permissions to send photos in this chat");
-  }
-
   // edit the existing status message
   await bot.api.editMessageText(
     state.replyMessage.chat.id,
@@ -161,7 +154,7 @@ async function processGenerationJob(
 
   // reduce size if worker can't handle the resolution
   const size = limitSize(
-    { ...config.defaultParams, ...state.task.params },
+    omitUndef({ ...config.defaultParams, ...state.task.params }),
     1024 * 1024,
   );
   function limitSize(
@@ -182,18 +175,18 @@ async function processGenerationJob(
   // start generating the image
   const responsePromise = state.task.type === "txt2img"
     ? workerSdClient.POST("/sdapi/v1/txt2img", {
-      body: {
+      body: omitUndef({
         ...config.defaultParams,
         ...state.task.params,
         ...size,
         negative_prompt: state.task.params.negative_prompt
           ? state.task.params.negative_prompt
           : config.defaultParams?.negative_prompt,
-      },
+      }),
     })
     : state.task.type === "img2img"
     ? workerSdClient.POST("/sdapi/v1/img2img", {
-      body: {
+      body: omitUndef({
         ...config.defaultParams,
         ...state.task.params,
         ...size,
@@ -209,7 +202,7 @@ async function processGenerationJob(
             ).then((resp) => resp.arrayBuffer()),
           ),
         ],
-      },
+      }),
     })
     : undefined;
 
@@ -239,8 +232,6 @@ async function processGenerationJob(
     if (progressResponse.data.progress > state.progress) {
       state.progress = progressResponse.data.progress;
       await updateJob({ state: state });
-      await bot.api.sendChatAction(state.chat.id, "upload_photo", { maxAttempts: 1 })
-        .catch(() => undefined);
       await bot.api.editMessageText(
         state.replyMessage.chat.id,
         state.replyMessage.message_id,
@@ -288,41 +279,49 @@ async function processGenerationJob(
     info,
   }, { retryCount: 5, retryDelayMs: 10000 });
 
+  const uploadQueueSize = await uploadQueue.getAllJobs().then((jobs) =>
+    jobs.filter((job) => job.status !== "processing").length
+  );
+
   // change status message to uploading images
   await bot.api.editMessageText(
     state.replyMessage.chat.id,
     state.replyMessage.message_id,
-    `Uploading your images...`,
+    uploadQueueSize > 10
+      ? `You are ${formatOrdinal(uploadQueueSize)} in upload queue.`
+      : `Uploading your images...`,
     { maxAttempts: 1 },
   ).catch(() => undefined);
 
+  // send upload photo action
+  await bot.api.sendChatAction(state.chat.id, "upload_photo", { maxAttempts: 1 })
+    .catch(() => undefined);
+
   debug(`Generation finished for ${formatUserChat(state)}`);
 }
 
 /**
  * Handles queue updates and updates the status message.
  */
-export async function updateGenerationQueue() {
+export async function updateGenerationQueue(): Promise<never> {
   while (true) {
     const jobs = await generationQueue.getAllJobs();
-    let index = 0;
-    for (const job of jobs) {
-      if (job.lockUntil > new Date()) {
-        // job is currently being processed, the worker will update its status message
-        continue;
+
+    await Promise.all(jobs.map(async (job) => {
+      if (job.status === "processing") {
+        // if the job is processing, the worker will update its status message
+        return;
       }
-      if (!job.state.replyMessage) {
-        // no status message, nothing to update
-        continue;
-      }
-      index++;
-      await bot.api.editMessageText(
+
+      return await bot.api.editMessageText(
         job.state.replyMessage.chat.id,
         job.state.replyMessage.message_id,
-        `You are ${formatOrdinal(index)} in queue.`,
+        `You are ${formatOrdinal(job.place)} in queue.`,
         { maxAttempts: 1 },
-      ).catch(() => undefined);
-    }
-    await delay(3000);
+      ).catch(() => {});
+    }));
+
+    // delay between updates based on the number of jobs
+    await delay(Math.min(15_000, Math.max(3_000, jobs.length * 100)));
   }
 }

app/generationStore.ts

@@ -5,10 +5,10 @@ import { db } from "./db.ts";
 export interface GenerationSchema {
   from: User;
   chat: Chat;
-  sdInstanceId?: string; // TODO: change to workerInstanceKey
-  info?: SdGenerationInfo;
-  startDate?: Date;
-  endDate?: Date;
+  sdInstanceId?: string | undefined; // TODO: change to workerInstanceKey
+  info?: SdGenerationInfo | undefined;
+  startDate?: Date | undefined;
+  endDate?: Date | undefined;
 }
 
 /**

app/globalStats.ts

@@ -1,23 +1,16 @@
 import { addDays } from "date-fns";
-import { JsonSchema, jsonType } from "t_rest/server";
 import { decodeTime } from "ulid";
 import { getDailyStats } from "./dailyStatsStore.ts";
 import { generationStore } from "./generationStore.ts";
 
-export const globalStatsSchema = {
-  type: "object",
-  properties: {
-    userIds: { type: "array", items: { type: "number" } },
-    imageCount: { type: "number" },
-    stepCount: { type: "number" },
-    pixelCount: { type: "number" },
-    pixelStepCount: { type: "number" },
-    timestamp: { type: "number" },
-  },
-  required: ["userIds", "imageCount", "stepCount", "pixelCount", "pixelStepCount", "timestamp"],
-} as const satisfies JsonSchema;
-
-export type GlobalStats = jsonType<typeof globalStatsSchema>;
+export interface GlobalStats {
+  userIds: number[];
+  imageCount: number;
+  stepCount: number;
+  pixelCount: number;
+  pixelStepCount: number;
+  timestamp: number;
+}
 
 export const globalStats: GlobalStats = await getGlobalStats();
 

app/kvMemoize.ts

@@ -1,45 +0,0 @@
-/**
- * Memoizes the function result in KV storage.
- */
-export function kvMemoize<A extends Deno.KvKey, R>(
-  db: Deno.Kv,
-  key: Deno.KvKey,
-  fn: (...args: A) => Promise<R>,
-  options?: {
-    expireIn?: number | ((result: R, ...args: A) => number);
-    shouldRecalculate?: (result: R, ...args: A) => boolean;
-    shouldCache?: (result: R, ...args: A) => boolean;
-    override?: {
-      set: (key: Deno.KvKey, args: A, value: R, options: { expireIn?: number }) => Promise<void>;
-      get: (key: Deno.KvKey, args: A) => Promise<R | undefined>;
-    };
-  },
-): (...args: A) => Promise<R> {
-  return async (...args) => {
-    const cachedResult = options?.override?.get
-      ? await options.override.get(key, args)
-      : (await db.get<R>([...key, ...args])).value;
-
-    if (cachedResult != null) {
-      if (!options?.shouldRecalculate?.(cachedResult, ...args)) {
-        return cachedResult;
-      }
-    }
-
-    const result = await fn(...args);
-
-    const expireIn = typeof options?.expireIn === "function"
-      ? options.expireIn(result, ...args)
-      : options?.expireIn;
-
-    if (options?.shouldCache?.(result, ...args) ?? (result != null)) {
-      if (options?.override?.set) {
-        await options.override.set(key, args, result, { expireIn });
-      } else {
-        await db.set([...key, ...args], result, { expireIn });
-      }
-    }
-
-    return result;
-  };
-}

app/uploadQueue.ts

@@ -92,7 +92,7 @@ export async function processUploadQueue() {
     // send caption in separate message if it couldn't fit
     if (caption.text.length > 1024 && caption.text.length <= 4096) {
       await bot.api.sendMessage(state.chat.id, caption.text, {
-        reply_to_message_id: resultMessages[0].message_id,
+        reply_to_message_id: resultMessages[0]!.message_id,
         allow_sending_without_reply: true,
         entities: caption.entities,
         maxWait: 60,
@@ -132,7 +132,7 @@ export async function processUploadQueue() {
     // delete the status message
     await bot.api.deleteMessage(state.replyMessage.chat.id, state.replyMessage.message_id)
       .catch(() => undefined);
-  }, { concurrency: 3 });
+  }, { concurrency: 10 });
 
   uploadWorker.addEventListener("error", (e) => {
     error(`Upload failed for ${formatUserChat(e.detail.job.state)}: ${e.detail.error}`);

app/userDailyStatsStore.ts

@@ -1,24 +1,59 @@
-import { JsonSchema, jsonType } from "t_rest/server";
-import { kvMemoize } from "./kvMemoize.ts";
+import { Static, t } from "elysia";
+import { kvMemoize } from "../utils/kvMemoize.ts";
 import { db } from "./db.ts";
 import { generationStore } from "./generationStore.ts";
+import { hoursToMilliseconds, isSameDay, minutesToMilliseconds } from "date-fns";
+import { UTCDateMini } from "date-fns/utc";
 
-export const userDailyStatsSchema = {
-  type: "object",
-  properties: {
-    imageCount: { type: "number" },
-    pixelCount: { type: "number" },
-    timestamp: { type: "number" },
-  },
-  required: ["imageCount", "pixelCount", "timestamp"],
-} as const satisfies JsonSchema;
+export const userDailyStatsSchema = t.Object({
+  imageCount: t.Number(),
+  pixelCount: t.Number(),
+  pixelStepCount: t.Number(),
+  timestamp: t.Number(),
+});
 
-export type UserDailyStats = jsonType<typeof userDailyStatsSchema>;
+export type UserDailyStats = Static<typeof userDailyStatsSchema>;
 
 export const getUserDailyStats = kvMemoize(
   db,
   ["userDailyStats"],
   async (userId: number, year: number, month: number, day: number): Promise<UserDailyStats> => {
-    throw new Error("Not implemented");
+    let imageCount = 0;
+    let pixelCount = 0;
+    let pixelStepCount = 0;
+
+    for await (
+      const generation of generationStore.listBy("fromId", {
+        after: new Date(Date.UTC(year, month - 1, day)),
+        before: new Date(Date.UTC(year, month - 1, day + 1)),
+        value: userId,
+      })
+    ) {
+      imageCount++;
+      pixelCount += (generation.value.info?.width ?? 0) * (generation.value.info?.height ?? 0);
+      pixelStepCount += (generation.value.info?.width ?? 0) *
+        (generation.value.info?.height ?? 0) *
+        (generation.value.info?.steps ?? 0);
+    }
+
+    return {
+      imageCount,
+      pixelCount,
+      pixelStepCount,
+      timestamp: Date.now(),
+    };
+  },
+  {
+    // expire in 1 minute if was calculated on the same day, otherwise 7-14 days.
+    expireIn: (result, year, month, day) => {
+      const requestDate = new UTCDateMini(year, month - 1, day);
+      const calculatedDate = new UTCDateMini(result.timestamp);
+      return isSameDay(requestDate, calculatedDate)
+        ? minutesToMilliseconds(1)
+        : hoursToMilliseconds(24 * 7 + Math.random() * 24 * 7);
+    },
+    // should cache if the stats are non-zero
+    shouldCache: (result) =>
+      result.imageCount > 0 || result.pixelCount > 0 || result.pixelStepCount > 0,
   },
 );

app/userStatsStore.ts

@@ -1,37 +1,23 @@
 import { minutesToMilliseconds } from "date-fns";
 import { Store } from "indexed_kv";
 import { info } from "std/log/mod.ts";
-import { JsonSchema, jsonType } from "t_rest/server";
+import { Static, t } from "elysia";
 import { db } from "./db.ts";
 import { generationStore } from "./generationStore.ts";
-import { kvMemoize } from "./kvMemoize.ts";
+import { kvMemoize } from "../utils/kvMemoize.ts";
+import { sortBy } from "std/collections/sort_by.ts";
 
-export const userStatsSchema = {
-  type: "object",
-  properties: {
-    userId: { type: "number" },
-    imageCount: { type: "number" },
-    stepCount: { type: "number" },
-    pixelCount: { type: "number" },
-    pixelStepCount: { type: "number" },
-    tagCountMap: {
-      type: "object",
-      additionalProperties: { type: "number" },
-    },
-    timestamp: { type: "number" },
-  },
-  required: [
-    "userId",
-    "imageCount",
-    "stepCount",
-    "pixelCount",
-    "pixelStepCount",
-    "tagCountMap",
-    "timestamp",
-  ],
-} as const satisfies JsonSchema;
+export const userStatsSchema = t.Object({
+  userId: t.Number(),
+  imageCount: t.Number(),
+  stepCount: t.Number(),
+  pixelCount: t.Number(),
+  pixelStepCount: t.Number(),
+  tagCountMap: t.Record(t.String(), t.Number()),
+  timestamp: t.Number(),
+});
 
-export type UserStats = jsonType<typeof userStatsSchema>;
+export type UserStats = Static<typeof userStatsSchema>;
 
 type UserStatsIndices = {
   userId: number;
@@ -59,7 +45,7 @@ export const getUserStats = kvMemoize(
     let stepCount = 0;
     let pixelCount = 0;
     let pixelStepCount = 0;
-    const tagCountMap: Record<string, number> = {};
+    const tagCountMap = new Map<string, number>();
 
     info(`Calculating user stats for ${userId}`);
 
@@ -77,7 +63,7 @@ export const getUserStats = kvMemoize(
         // split on punctuation and newlines
         .split(/[,;.]\s+|\n/)
         // remove `:weight` syntax
-        .map((tag) => tag.replace(/:[\d\.]+/g, " "))
+        .map((tag) => tag.replace(/:[\d\.]+/g, ""))
         // remove `(tag)` and `[tag]` syntax
         .map((tag) => tag.replace(/[()[\]]/g, " "))
         // collapse multiple whitespace to one
@@ -92,17 +78,25 @@ export const getUserStats = kvMemoize(
         [];
 
       for (const tag of tags) {
-        tagCountMap[tag] = (tagCountMap[tag] ?? 0) + 1;
+        const count = tagCountMap.get(tag) ?? 0;
+        tagCountMap.set(tag, count + 1);
       }
     }
 
+    const tagCountObj = Object.fromEntries(
+      sortBy(
+        Array.from(tagCountMap.entries()),
+        ([_tag, count]) => -count,
+      ).filter(([_tag, count]) => count >= 3),
+    );
+
     return {
       userId,
       imageCount,
       stepCount,
       pixelCount,
       pixelStepCount,
-      tagCountMap,
+      tagCountMap: tagCountObj,
       timestamp: Date.now(),
     };
   },

app/workerInstanceStore.ts

@@ -1,37 +1,23 @@
 import { Store } from "indexed_kv";
-import { JsonSchema, jsonType } from "t_rest/server";
+import { Static, t } from "elysia";
 import { db } from "./db.ts";
 
-export const workerInstanceSchema = {
-  type: "object",
-  properties: {
-    // used for counting stats
-    key: { type: "string" },
-    // used for display
-    name: { type: ["string", "null"] },
-    sdUrl: { type: "string" },
-    sdAuth: {
-      type: ["object", "null"],
-      properties: {
-        user: { type: "string" },
-        password: { type: "string" },
-      },
-      required: ["user", "password"],
-    },
-    lastOnlineTime: { type: "number" },
-    lastError: {
-      type: "object",
-      properties: {
-        message: { type: "string" },
-        time: { type: "number" },
-      },
-      required: ["message", "time"],
-    },
-  },
-  required: ["key", "name", "sdUrl", "sdAuth"],
-} as const satisfies JsonSchema;
+export const workerInstanceSchema = t.Object({
+  key: t.String(),
+  name: t.Nullable(t.String()),
+  sdUrl: t.String(),
+  sdAuth: t.Nullable(t.Object({
+    user: t.String(),
+    password: t.String(),
+  })),
+  lastOnlineTime: t.Optional(t.Number()),
+  lastError: t.Optional(t.Object({
+    message: t.String(),
+    time: t.Number(),
+  })),
+});
 
-export type WorkerInstance = jsonType<typeof workerInstanceSchema>;
+export type WorkerInstance = Static<typeof workerInstanceSchema>;
 
 export const workerInstanceStore = new Store<WorkerInstance>(db, "workerInstances", {
   indices: {},

bot/broadcastCommand.ts

@@ -2,7 +2,7 @@ import { CommandContext } from "grammy";
 import { bold, fmt, FormattedString } from "grammy_parse_mode";
 import { distinctBy } from "std/collections/distinct_by.ts";
 import { error, info } from "std/log/mod.ts";
-import { getConfig } from "../app/config.ts";
+import { adminStore } from "../app/adminStore.ts";
 import { generationStore } from "../app/generationStore.ts";
 import { formatUserChat } from "../utils/formatUserChat.ts";
 import { ErisContext } from "./mod.ts";
@@ -12,9 +12,9 @@ export async function broadcastCommand(ctx: CommandContext<ErisContext>) {
     return ctx.reply("I don't know who you are.");
   }
 
-  const config = await getConfig();
+  const adminEntry = await adminStore.get(["admins", ctx.from.id]);
 
-  if (!config.adminUsernames.includes(ctx.from.username)) {
+  if (!adminEntry.versionstamp) {
     return ctx.reply("Only a bot admin can use this command.");
   }
 

bot/cancelCommand.ts

@@ -1,4 +1,5 @@
 import { generationQueue } from "../app/generationQueue.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
 import { ErisContext } from "./mod.ts";
 
 export async function cancelCommand(ctx: ErisContext) {
@@ -7,8 +8,11 @@ export async function cancelCommand(ctx: ErisContext) {
     .filter((job) => job.lockUntil < new Date())
     .filter((j) => j.state.from.id === ctx.from?.id);
   for (const job of userJobs) await generationQueue.deleteJob(job.id);
-  await ctx.reply(`Cancelled ${userJobs.length} jobs`, {
+  await ctx.reply(
+    `Cancelled ${userJobs.length} jobs`,
+    omitUndef({
       reply_to_message_id: ctx.message?.message_id,
       allow_sending_without_reply: true,
-  });
+    }),
+  );
 }

bot/img2imgCommand.ts

@@ -129,7 +129,7 @@ async function img2img(
     chat: ctx.message.chat,
     requestMessage: ctx.message,
     replyMessage: replyMessage,
-  }, { retryCount: 3, repeatDelayMs: 10_000 });
+  }, { priority: 0, retryCount: 3, repeatDelayMs: 10_000 });
 
   debug(`Generation (img2img) enqueued for ${formatUserChat(ctx.message)}`);
 }

bot/mod.ts

@@ -4,8 +4,8 @@ import { hydrateReply, ParseModeFlavor } from "grammy_parse_mode";
 import { run, sequentialize } from "grammy_runner";
 import { error, info, warning } from "std/log/mod.ts";
 import { sessions } from "../api/sessionsRoute.ts";
-import { getConfig, setConfig } from "../app/config.ts";
 import { formatUserChat } from "../utils/formatUserChat.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
 import { broadcastCommand } from "./broadcastCommand.ts";
 import { cancelCommand } from "./cancelCommand.ts";
 import { img2imgCommand, img2imgQuestion } from "./img2imgCommand.ts";
@@ -19,11 +19,11 @@ interface SessionData {
 }
 
 interface ErisChatData {
-  language?: string;
+  language?: string | undefined;
 }
 
 interface ErisUserData {
-  params?: Record<string, string>;
+  params?: Record<string, string> | undefined;
 }
 
 export type ErisContext =
@@ -94,10 +94,13 @@ bot.use(async (ctx, next) => {
     await next();
   } catch (err) {
     try {
-      await ctx.reply(`Handling update failed: ${err}`, {
+      await ctx.reply(
+        `Handling update failed: ${err}`,
+        omitUndef({
           reply_to_message_id: ctx.message?.message_id,
           allow_sending_without_reply: true,
-      });
+        }),
+      );
     } catch {
       throw err;
     }
@@ -112,7 +115,7 @@ bot.api.setMyDescription(
 bot.api.setMyCommands([
   { command: "txt2img", description: "Generate image from text" },
   { command: "img2img", description: "Generate image from image" },
-  { command: "pnginfo", description: "Show generation parameters of an image" },
+  { command: "pnginfo", description: "Try to extract prompt from raw file" },
   { command: "queue", description: "Show the current queue" },
   { command: "cancel", description: "Cancel all your requests" },
 ]);
@@ -122,24 +125,33 @@ bot.command("start", async (ctx) => {
     const id = ctx.match.trim();
     const session = sessions.get(id);
     if (session == null) {
-      await ctx.reply("Login failed: Invalid session ID", {
+      await ctx.reply(
+        "Login failed: Invalid session ID",
+        omitUndef({
           reply_to_message_id: ctx.message?.message_id,
-      });
+        }),
+      );
       return;
     }
     session.userId = ctx.from?.id;
     sessions.set(id, session);
     info(`User ${formatUserChat(ctx)} logged in`);
     // TODO: show link to web ui
-    await ctx.reply("Login successful! You can now return to the WebUI.", {
+    await ctx.reply(
+      "Login successful! You can now return to the WebUI.",
+      omitUndef({
         reply_to_message_id: ctx.message?.message_id,
-    });
+      }),
+    );
     return;
   }
 
-  await ctx.reply("Hello! Use the /txt2img command to generate an image", {
+  await ctx.reply(
+    "Hello! Use the /txt2img command to generate an image",
+    omitUndef({
       reply_to_message_id: ctx.message?.message_id,
-  });
+    }),
+  );
 });
 
 bot.command("txt2img", txt2imgCommand);
@@ -157,35 +169,11 @@ bot.command("cancel", cancelCommand);
 
 bot.command("broadcast", broadcastCommand);
 
-bot.command("pause", async (ctx) => {
-  if (!ctx.from?.username) return;
-  const config = await getConfig();
-  if (!config.adminUsernames.includes(ctx.from.username)) return;
-  if (config.pausedReason != null) {
-    return ctx.reply(`Already paused: ${config.pausedReason}`);
-  }
-  await setConfig({
-    pausedReason: ctx.match || "No reason given",
-  });
-  warning(`Bot paused by ${ctx.from.first_name} because ${config.pausedReason}`);
-  return ctx.reply("Paused");
-});
-
-bot.command("resume", async (ctx) => {
-  if (!ctx.from?.username) return;
-  const config = await getConfig();
-  if (!config.adminUsernames.includes(ctx.from.username)) return;
-  if (config.pausedReason == null) return ctx.reply("Already running");
-  await setConfig({ pausedReason: null });
-  info(`Bot resumed by ${ctx.from.first_name}`);
-  return ctx.reply("Resumed");
-});
-
 bot.command("crash", () => {
   throw new Error("Crash command used");
 });
 
 export async function runBot() {
-  const runner = run(bot);
+  const runner = run(bot, { runner: { silent: true } });
   await runner.task();
 }

bot/parsePngInfo.ts

@@ -1,12 +1,24 @@
-import { decode } from "png_chunk_text";
-import extractChunks from "png_chunks_extract";
+import * as ExifReader from "exifreader";
 
-export function getPngInfo(pngData: Uint8Array): string | undefined {
-  return extractChunks(pngData)
-    .filter((chunk) => chunk.name === "tEXt" || chunk.name === "iTXt")
-    .map((chunk) => decode(chunk.data))
-    .find((textChunk) => textChunk.keyword === "parameters")
-    ?.text;
+export function getPngInfo(pngData: ArrayBuffer): string | undefined {
+  const info = ExifReader.load(pngData);
+
+  if (info.UserComment?.value && Array.isArray(info.UserComment.value)) {
+    // JPEG image
+    return String.fromCharCode(
+      ...info.UserComment.value
+        .filter((char): char is number => typeof char == "number")
+        .filter((char) => char !== 0),
+    ).replace("UNICODE", "");
+  }
+
+  if (info.parameters?.description) {
+    // PNG image
+    return info.parameters.description;
+  }
+
+  // Unknown image type
+  return undefined;
 }
 
 export interface PngInfo {
@@ -38,7 +50,7 @@ export function parsePngInfo(
   for (const tag of tags) {
     const paramValuePair = tag.trim().match(/^(\w+\s*\w*):\s+(.*)$/u);
     if (paramValuePair) {
-      const [, param, value] = paramValuePair;
+      const [_match, param = "", value = ""] = paramValuePair;
       switch (param.replace(/\s+/u, "").toLowerCase()) {
         case "positiveprompt":
         case "positive":
@@ -71,7 +83,7 @@ export function parsePngInfo(
         case "size":
         case "resolution": {
           part = "params";
-          const [width, height] = value.trim()
+          const [width = 0, height = 0] = value.trim()
             .split(/\s*[x,]\s*/u, 2)
             .map((v) => v.trim())
             .map(Number);
@@ -107,8 +119,10 @@ export function parsePngInfo(
           part = "params";
           if (shouldParseSeed) {
             const seed = Number(value.trim());
+            if (Number.isFinite(seed)) {
               params.seed = seed;
             }
+          }
           break;
         }
         case "model":

bot/pnginfoCommand.ts

@@ -1,6 +1,7 @@
 import { CommandContext } from "grammy";
 import { bold, fmt } from "grammy_parse_mode";
 import { StatelessQuestion } from "grammy_stateless_question";
+import { omitUndef } from "../utils/omitUndef.ts";
 import { ErisContext } from "./mod.ts";
 import { getPngInfo, parsePngInfo } from "./parsePngInfo.ts";
 
@@ -19,29 +20,31 @@ async function pnginfo(ctx: ErisContext, includeRepliedTo: boolean): Promise<voi
   const document = ctx.message?.document ||
     (includeRepliedTo ? ctx.message?.reply_to_message?.document : undefined);
 
-  if (document?.mime_type !== "image/png") {
+  if (document?.mime_type !== "image/png" && document?.mime_type !== "image/jpeg") {
     await ctx.reply(
-      "Please send me a PNG file." +
+      "Please send me a PNG or JPEG file." +
         pnginfoQuestion.messageSuffixMarkdown(),
+      omitUndef(
         {
           reply_markup: { force_reply: true, selective: true },
           parse_mode: "Markdown",
           reply_to_message_id: ctx.message?.message_id,
-      },
+        } as const,
+      ),
     );
     return;
   }
 
   const file = await ctx.api.getFile(document.file_id);
   const buffer = await fetch(file.getUrl()).then((resp) => resp.arrayBuffer());
-  const params = parsePngInfo(getPngInfo(new Uint8Array(buffer)) ?? "");
-
-  if (!params.prompt) {
-    ctx.reply("File doesn't contain any parameters.", {
-      reply_to_message_id: ctx.message?.message_id,
-    });
-    return;
+  const info = getPngInfo(buffer);
+  if (!info) {
+    return void await ctx.reply(
+      "No info found in file.",
+      omitUndef({ reply_to_message_id: ctx.message?.message_id }),
+    );
   }
+  const params = parsePngInfo(info, undefined, true);
 
   const paramsText = fmt([
     `${params.prompt}\n`,
@@ -53,8 +56,11 @@ async function pnginfo(ctx: ErisContext, includeRepliedTo: boolean): Promise<voi
     params.width && params.height ? fmt`${bold("Size")}: ${params.width}x${params.height}` : "",
   ]);
 
-  await ctx.reply(paramsText.text, {
+  await ctx.reply(
+    paramsText.text,
+    omitUndef({
       entities: paramsText.entities,
       reply_to_message_id: ctx.message?.message_id,
-  });
+    }),
+  );
 }

bot/queueCommand.ts

@@ -1,16 +1,20 @@
 import { CommandContext } from "grammy";
 import { bold, fmt } from "grammy_parse_mode";
 import { activeGenerationWorkers, generationQueue } from "../app/generationQueue.ts";
-import { getFlagEmoji } from "../utils/getFlagEmoji.ts";
-import { ErisContext } from "./mod.ts";
 import { workerInstanceStore } from "../app/workerInstanceStore.ts";
+import { getFlagEmoji } from "../utils/getFlagEmoji.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
+import { ErisContext } from "./mod.ts";
 
 export async function queueCommand(ctx: CommandContext<ErisContext>) {
   let formattedMessage = await getMessageText();
-  const queueMessage = await ctx.replyFmt(formattedMessage, {
+  const queueMessage = await ctx.replyFmt(
+    formattedMessage,
+    omitUndef({
       disable_notification: true,
       reply_to_message_id: ctx.message?.message_id,
-  });
+    }),
+  );
   handleFutureUpdates().catch(() => undefined);
 
   async function getMessageText() {

bot/txt2imgCommand.ts

@@ -6,6 +6,7 @@ import { generationQueue } from "../app/generationQueue.ts";
 import { formatUserChat } from "../utils/formatUserChat.ts";
 import { ErisContext } from "./mod.ts";
 import { getPngInfo, parsePngInfo, PngInfo } from "./parsePngInfo.ts";
+import { adminStore } from "../app/adminStore.ts";
 
 export const txt2imgQuestion = new StatelessQuestion<ErisContext>(
   "txt2img",
@@ -29,6 +30,7 @@ async function txt2img(ctx: ErisContext, match: string, includeRepliedTo: boolea
   }
 
   const config = await getConfig();
+  let priority = 0;
 
   if (config.pausedReason != null) {
     await ctx.reply(`I'm paused: ${config.pausedReason || "No reason given"}`, {
@@ -37,6 +39,11 @@ async function txt2img(ctx: ErisContext, match: string, includeRepliedTo: boolea
     return;
   }
 
+  const adminEntry = await adminStore.get(["admins", ctx.from.id]);
+
+  if (adminEntry.versionstamp) {
+    priority = 1;
+  } else {
     const jobs = await generationQueue.getAllJobs();
     if (jobs.length >= config.maxJobs) {
       await ctx.reply(`The queue is full. Try again later. (Max queue size: ${config.maxJobs})`, {
@@ -47,11 +54,12 @@ async function txt2img(ctx: ErisContext, match: string, includeRepliedTo: boolea
 
     const userJobs = jobs.filter((job) => job.state.from.id === ctx.message?.from?.id);
     if (userJobs.length >= config.maxUserJobs) {
-    await ctx.reply(`You already have ${userJobs.length} jobs in queue. Try again later.`, {
+      await ctx.reply(`You already have ${userJobs.length} jobs in the queue. Try again later.`, {
         reply_to_message_id: ctx.message?.message_id,
       });
       return;
     }
+  }
 
   let params: Partial<PngInfo> = {};
 
@@ -60,17 +68,26 @@ async function txt2img(ctx: ErisContext, match: string, includeRepliedTo: boolea
   if (includeRepliedTo && repliedToMsg?.document?.mime_type === "image/png") {
     const file = await ctx.api.getFile(repliedToMsg.document.file_id);
     const buffer = await fetch(file.getUrl()).then((resp) => resp.arrayBuffer());
-    params = parsePngInfo(getPngInfo(new Uint8Array(buffer)) ?? "", params);
+    params = parsePngInfo(getPngInfo(buffer) ?? "", params);
   }
 
   const repliedToText = repliedToMsg?.text || repliedToMsg?.caption;
-  if (includeRepliedTo && repliedToText) {
+  const isReply = includeRepliedTo && repliedToText;
+
+  if (isReply) {
     // TODO: remove bot command from replied to text
     params = parsePngInfo(repliedToText, params);
   }
 
   params = parsePngInfo(match, params, true);
 
+  if (isReply) {
+    const parsedInfo = parsePngInfo(repliedToText, undefined, true);
+    if (parsedInfo.prompt !== params.prompt) {
+      params.seed = parsedInfo.seed ?? -1;
+    }
+  }
+
   if (!params.prompt) {
     await ctx.reply(
       "Please tell me what you want to see." +
@@ -94,7 +111,7 @@ async function txt2img(ctx: ErisContext, match: string, includeRepliedTo: boolea
     chat: ctx.message.chat,
     requestMessage: ctx.message,
     replyMessage: replyMessage,
-  }, { retryCount: 3, retryDelayMs: 10_000 });
+  }, { retryCount: 3, retryDelayMs: 10_000, priority: priority });
 
   debug(`Generation (txt2img) enqueued for ${formatUserChat(ctx.message)}`);
 }

deno.json

@@ -1,32 +1,37 @@
 {
-  "tasks": {
-    "start": "deno run --unstable --allow-env --allow-read --allow-write --allow-net main.ts",
-    "check": "deno check --unstable main.ts && deno check --unstable ui/main.tsx"
-  },
   "compilerOptions": {
-    "jsx": "react"
+    "exactOptionalPropertyTypes": true,
+    "jsx": "react",
+    "noUncheckedIndexedAccess": true
   },
   "fmt": {
     "lineWidth": 100
   },
   "imports": {
-    "@date-fns/utc": "https://cdn.skypack.dev/@date-fns/utc@1.1.0?dts",
     "async": "https://deno.land/x/async@v2.0.2/mod.ts",
     "date-fns": "https://cdn.skypack.dev/date-fns@2.30.0?dts",
+    "date-fns/utc": "https://cdn.skypack.dev/@date-fns/utc@1.1.0?dts",
+    "elysia": "https://esm.sh/elysia@0.7.21?dev",
+    "elysia/eden": "https://esm.sh/@elysiajs/eden@0.7.4?external=elysia&dev",
+    "elysia/swagger": "https://esm.sh/@elysiajs/swagger@0.7.4?external=elysia&dev",
+    "exifreader": "https://esm.sh/exifreader@4.14.1",
     "file_type": "https://esm.sh/file-type@18.5.0",
+    "grammy": "https://lib.deno.dev/x/grammy@1/mod.ts",
     "grammy_autoquote": "https://lib.deno.dev/x/grammy_autoquote@1/mod.ts",
     "grammy_files": "https://lib.deno.dev/x/grammy_files@1/mod.ts",
     "grammy_parse_mode": "https://lib.deno.dev/x/grammy_parse_mode@1/mod.ts",
     "grammy_runner": "https://lib.deno.dev/x/grammy_runner@2/mod.ts",
     "grammy_stateless_question": "https://lib.deno.dev/x/grammy_stateless_question_alpha@3/mod.ts",
     "grammy_types": "https://lib.deno.dev/x/grammy_types@3/mod.ts",
-    "grammy": "https://lib.deno.dev/x/grammy@1/mod.ts",
-    "indexed_kv": "https://deno.land/x/indexed_kv@v0.5.0/mod.ts",
+    "indexed_kv": "https://deno.land/x/indexed_kv@v0.6.1/mod.ts",
     "kvfs": "https://deno.land/x/kvfs@v0.1.0/mod.ts",
     "kvmq": "https://deno.land/x/kvmq@v0.3.0/mod.ts",
     "openapi_fetch": "https://esm.sh/openapi-fetch@0.7.6",
-    "png_chunk_text": "https://esm.sh/png-chunk-text@1.0.0",
-    "png_chunks_extract": "https://esm.sh/png-chunks-extract@1.0.0",
+    "react": "https://esm.sh/react@18.2.0?dev",
+    "react-dom/client": "https://esm.sh/react-dom@18.2.0/client?external=react&dev",
+    "react-flip-move": "https://esm.sh/react-flip-move@3.0.5?external=react&dev",
+    "react-intl": "https://esm.sh/react-intl@6.4.7?external=react&dev",
+    "react-router-dom": "https://esm.sh/react-router-dom@6.16.0?external=react&dev",
     "reroute": "https://deno.land/x/reroute@v0.1.0/mod.ts",
     "serve_spa": "https://deno.land/x/serve_spa@v0.2.0/mod.ts",
     "std/async/": "https://deno.land/std@0.201.0/async/",
@@ -36,19 +41,23 @@
     "std/fmt/": "https://deno.land/std@0.202.0/fmt/",
     "std/log/": "https://deno.land/std@0.201.0/log/",
     "std/path/": "https://deno.land/std@0.204.0/path/",
-    "t_rest/server": "https://esm.sh/ty-rest@0.4.0/server?dev",
-    "ulid": "https://deno.land/x/ulid@v0.3.0/mod.ts",
-
-    "@twind/core": "https://esm.sh/@twind/core@1.1.3?dev",
-    "@twind/preset-tailwind": "https://esm.sh/@twind/preset-tailwind@1.1.4?dev",
-    "react-dom/client": "https://esm.sh/react-dom@18.2.0/client?dev",
-    "react-flip-move": "https://esm.sh/react-flip-move@3.0.5?dev",
-    "react-intl": "https://esm.sh/react-intl@6.4.7?external=react&alias=@types/react:react&dev",
-    "react-router-dom": "https://esm.sh/react-router-dom@6.16.0?dev",
-    "react": "https://esm.sh/react@18.2.0?dev",
-    "swr": "https://esm.sh/swr@2.2.4?dev",
-    "swr/mutation": "https://esm.sh/swr@2.2.4/mutation?dev",
-    "t_rest/client": "https://esm.sh/ty-rest@0.4.0/client?dev",
-    "use-local-storage": "https://esm.sh/use-local-storage@3.0.0?dev"
+    "swr": "https://esm.sh/swr@2.2.4?external=react&dev",
+    "swr/mutation": "https://esm.sh/swr@2.2.4/mutation?external=react&dev",
+    "twind/core": "https://esm.sh/@twind/core@1.1.3",
+    "twind/preset-tailwind": "https://esm.sh/@twind/preset-tailwind@1.1.4",
+    "ulid": "https://deno.land/x/ulid@v0.3.0/mod.ts"
+  },
+  "lint": {
+    "rules": {
+      "exclude": [
+        "require-await"
+      ]
+    }
+  },
+  "tasks": {
+    "check": "deno check --unstable-kv main.ts && deno check --unstable-kv ui/main.tsx",
+    "generate": "deno run npm:openapi-typescript http://localhost:7861/openapi.json -o app/sdApi.ts",
+    "start": "deno run --unstable-kv --allow-env --allow-read=. --allow-write=db --allow-net main.ts",
+    "test": "deno test"
   }
 }

deno.lock

@@ -1,362 +0,0 @@
-{
-  "version": "3",
-  "packages": {
-    "specifiers": {
-      "npm:telegram-format@2": "npm:telegram-format@2.1.0"
-    },
-    "npm": {
-      "telegram-format@2.1.0": {
-        "integrity": "sha512-V2thkhKzcNVL26h/ANeat/Z+AXBaDGoizs4cab6Kpq/w+d+Ai6M/AFFkuBwvCkZXqb+7UW2vt3Dko5+kKcOIHg==",
-        "dependencies": {}
-      }
-    }
-  },
-  "redirects": {
-    "https://cdn.skypack.dev/-/@date-fns/utc@v1.1.0-EKCmNY9452DyFBJfVVmZ/dist=es2019,mode=types/date.d.ts": "https://cdn.skypack.dev/-/@date-fns/utc@v1.1.0-EKCmNY9452DyFBJfVVmZ/dist=es2019,mode=types/date/index.d.ts",
-    "https://deno.land/std/path/mod.ts": "https://deno.land/std@0.204.0/path/mod.ts",
-    "https://esm.sh/@grammyjs/types@2": "https://esm.sh/@grammyjs/types@2.12.1",
-    "https://esm.sh/@grammyjs/types@v2": "https://esm.sh/@grammyjs/types@2.0.0",
-    "https://esm.sh/@swc/core@1.2.212/types.d.ts": "https://esm.sh/v133/@swc/core@1.2.212/types.d.ts",
-    "https://esm.sh/v128/@types/react@~18.2/index.d.ts": "https://esm.sh/v128/@types/react@18.2.25/index.d.ts",
-    "https://esm.sh/v133/@types/png-chunk-text@~1.0/index.d.ts": "https://esm.sh/v133/@types/png-chunk-text@1.0.1/index.d.ts",
-    "https://esm.sh/v133/@types/png-chunks-extract@~1.0/index.d.ts": "https://esm.sh/v133/@types/png-chunks-extract@1.0.0/index.d.ts",
-    "https://esm.sh/v133/@types/react-dom@~18.2/client~.d.ts": "https://esm.sh/v133/@types/react-dom@18.2.13/client~.d.ts",
-    "https://lib.deno.dev/x/grammy@1/mod.ts": "https://deno.land/x/grammy@v1.19.1/mod.ts",
-    "https://lib.deno.dev/x/grammy@^1.0/mod.ts": "https://deno.land/x/grammy@v1.19.1/mod.ts",
-    "https://lib.deno.dev/x/grammy@v1/mod.ts": "https://deno.land/x/grammy@v1.19.1/mod.ts",
-    "https://lib.deno.dev/x/grammy@v1/types.ts": "https://deno.land/x/grammy@v1.19.1/types.ts",
-    "https://lib.deno.dev/x/grammy_files@1/mod.ts": "https://deno.land/x/grammy_files@v1.0.4/mod.ts",
-    "https://lib.deno.dev/x/grammy_parse_mode@1/mod.ts": "https://deno.land/x/grammy_parse_mode@1.8.1/mod.ts",
-    "https://lib.deno.dev/x/grammy_runner@2/mod.ts": "https://deno.land/x/grammy_runner@v2.0.3/mod.ts",
-    "https://lib.deno.dev/x/grammy_stateless_question_alpha@3/mod.ts": "https://deno.land/x/grammy_stateless_question_alpha@v3.0.4/mod.ts",
-    "https://lib.deno.dev/x/grammy_types@3/mod.ts": "https://deno.land/x/grammy_types@v3.3.0/mod.ts"
-  },
-  "remote": {
-    "https://cdn.skypack.dev/-/@date-fns/utc@v1.1.0-EKCmNY9452DyFBJfVVmZ/dist=es2019,mode=imports/optimized/@date-fns/utc.js": "f3566d499010a4872640fc2c5f539e98d490d794f43e597a2da9aadf03b2c050",
-    "https://cdn.skypack.dev/-/@date-fns/utc@v1.1.0-EKCmNY9452DyFBJfVVmZ/dist=es2019,mode=imports/optimized/@date-fns/utc/date.js": "bd4ef50c3a846971a4b001bfdbfee22e9b523a4faaaa776c1001b5c8b450a025",
-    "https://cdn.skypack.dev/-/@date-fns/utc@v1.1.0-EKCmNY9452DyFBJfVVmZ/dist=es2019,mode=imports/optimized/@date-fns/utc/date/mini.js": "2d7a4c546f921006542c2f83b76a5d1a94c670f9c885382d998054f627aadd5a",
-    "https://cdn.skypack.dev/-/date-fns@v2.30.0-E7SpvwCL3wRUK0Q9mmOa/dist=es2019,mode=imports/optimized/date-fns.js": "9e81dde88a23d207bf9c40c8350525c9115eeede74000c9f94fcd4a65ce64865",
-    "https://cdn.skypack.dev/-/debug@v4.3.4-o4liVvMlOnQWbLSYZMXw/dist=es2019,mode=imports/optimized/debug.js": "671100993996e39b501301a87000607916d4d2d9f8fc8e9c5200ae5ba64a1389",
-    "https://cdn.skypack.dev/-/ms@v2.1.2-giBDZ1IA5lmQ3ZXaa87V/dist=es2019,mode=imports/optimized/ms.js": "fd88e2d51900437011f1ad232f3393ce97db1b87a7844b3c58dd6d65562c1276",
-    "https://cdn.skypack.dev/@date-fns/utc@1.1.0?dts": "9fafa18de74e61386a79482ca58b766c0be1f8fd10bdc931ef26bd4b8cdac91e",
-    "https://cdn.skypack.dev/date-fns@2.30.0?dts": "9cf78eb65f86f7b699e241a1e0ff94f3878d693e517e21ddc7fe727e3b479058",
-    "https://cdn.skypack.dev/debug@4.3.4": "7b1d010cc930f71b940ba5941da055bc181115229e29de7214bdb4425c68ea76",
-    "https://deno.land/std@0.135.0/_util/assert.ts": "e94f2eb37cebd7f199952e242c77654e43333c1ac4c5c700e929ea3aa5489f74",
-    "https://deno.land/std@0.135.0/_util/os.ts": "49b92edea1e82ba295ec946de8ffd956ed123e2948d9bd1d3e901b04e4307617",
-    "https://deno.land/std@0.135.0/bytes/bytes_list.ts": "67eb118e0b7891d2f389dad4add35856f4ad5faab46318ff99653456c23b025d",
-    "https://deno.land/std@0.135.0/bytes/equals.ts": "a60ef9f01fb6e06a4e0343fc44d53d39d12dd66bc3f09ac8e6eb9cc1a6335e48",
-    "https://deno.land/std@0.135.0/bytes/mod.ts": "4cef6fe8f0de217b9babbcbb0a566402b667f18a8e6d094a45e5fb3fc1afff70",
-    "https://deno.land/std@0.135.0/fmt/colors.ts": "30455035d6d728394781c10755351742dd731e3db6771b1843f9b9e490104d37",
-    "https://deno.land/std@0.135.0/io/buffer.ts": "bd0c4bf53db4b4be916ca5963e454bddfd3fcd45039041ea161dbf826817822b",
-    "https://deno.land/std@0.135.0/io/files.ts": "d199ef64e918a256320ba8d8d44ae91de87c9077df8f8d6cca013f1b9fbbe285",
-    "https://deno.land/std@0.135.0/io/mod.ts": "1a4e8d19d42745fb2ff68d6ffa801657a4a15713bf7e7173df2da4737f5c5450",
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-}

ui/AdminsPage.tsx

@@ -0,0 +1,242 @@
+import React, { useRef } from "react";
+import useSWR, { useSWRConfig } from "swr";
+import { AdminData } from "../api/adminsRoute.ts";
+import { fetchApi, handleResponse } from "./apiClient.ts";
+
+export function AdminsPage(props: { sessionId: string | null }) {
+  const { sessionId } = props;
+
+  const { mutate } = useSWRConfig();
+
+  const addDialogRef = useRef<HTMLDialogElement>(null);
+
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { params: { sessionId } }] as const : null,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", { params: { userId: String(getSession.data.userId) } }] as const
+      : null,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+
+  const getAdmins = useSWR(
+    ["/admins", { method: "GET" }] as const,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+
+  return (
+    <>
+      {getUser.data && getAdmins.data && getAdmins.data.length === 0 && (
+        <button
+          className="button-filled"
+          onClick={() => {
+            fetchApi("/admins/promote_self", {
+              method: "POST",
+              query: { sessionId: sessionId ?? "" },
+            }).then(handleResponse).then(() => mutate(() => true));
+          }}
+        >
+          Promote me to admin
+        </button>
+      )}
+
+      {getAdmins.data?.length
+        ? (
+          <ul className="flex flex-col gap-2">
+            {getAdmins.data.map((admin) => (
+              <AdminListItem key={admin.tgUserId} admin={admin} sessionId={sessionId} />
+            ))}
+          </ul>
+        )
+        : getAdmins.data?.length === 0
+        ? (
+          <ul className="flex flex-col gap-2">
+            <li className="flex flex-col gap-2 rounded-md bg-zinc-100 dark:bg-zinc-800 p-2">
+              <p key="no-admins" className="text-center text-gray-500">No admins.</p>
+            </li>
+          </ul>
+        )
+        : getAdmins.error
+        ? <p className="alert">Loading admins failed</p>
+        : <div className="spinner self-center" />}
+
+      {getUser.data?.admin && (
+        <button
+          className="button-filled"
+          onClick={() => addDialogRef.current?.showModal()}
+        >
+          Add admin
+        </button>
+      )}
+
+      <AddAdminDialog
+        dialogRef={addDialogRef}
+        sessionId={sessionId}
+      />
+    </>
+  );
+}
+
+function AddAdminDialog(props: {
+  dialogRef: React.RefObject<HTMLDialogElement>;
+  sessionId: string | null;
+}) {
+  const { dialogRef, sessionId } = props;
+
+  const { mutate } = useSWRConfig();
+
+  return (
+    <dialog ref={dialogRef} className="dialog animate-pop-in backdrop-animate-fade-in">
+      <form
+        method="dialog"
+        className="flex flex-col gap-4 p-4"
+        onSubmit={(e) => {
+          e.preventDefault();
+          const data = new FormData(e.target as HTMLFormElement);
+          fetchApi("/admins", {
+            method: "POST",
+            query: { sessionId: sessionId! },
+            body: {
+              tgUserId: Number(data.get("tgUserId") as string),
+            },
+          }).then(handleResponse).then(() => mutate(() => true));
+          dialogRef.current?.close();
+        }}
+      >
+        <label className="flex flex-col items-stretch gap-1">
+          <span className="text-sm">
+            Telegram user ID
+          </span>
+          <input
+            className="input-text"
+            type="text"
+            name="tgUserId"
+            required
+            pattern="-?\d+"
+          />
+        </label>
+
+        <div className="flex gap-2 items-center justify-end">
+          <button
+            type="button"
+            className="button-outlined"
+            onClick={() => dialogRef.current?.close()}
+          >
+            Close
+          </button>
+          <button type="submit" className="button-filled">
+            Save
+          </button>
+        </div>
+      </form>
+    </dialog>
+  );
+}
+
+function AdminListItem(props: { admin: AdminData; sessionId: string | null }) {
+  const { admin, sessionId } = props;
+
+  const deleteDialogRef = useRef<HTMLDialogElement>(null);
+
+  const getAdminUser = useSWR(
+    ["/users/:userId", { params: { userId: String(admin.tgUserId) } }] as const,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { params: { sessionId } }] as const : null,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", { params: { userId: String(getSession.data.userId) } }] as const
+      : null,
+    (args) => fetchApi(...args).then(handleResponse),
+  );
+
+  return (
+    <li className="flex flex-col gap-2 rounded-md bg-zinc-100 dark:bg-zinc-800 p-2">
+      <p className="font-bold">
+        {getAdminUser.data?.first_name ?? admin.tgUserId} {getAdminUser.data?.last_name}{" "}
+        {getAdminUser.data?.username
+          ? (
+            <a href={`https://t.me/${getAdminUser.data.username}`} className="link">
+              @{getAdminUser.data.username}
+            </a>
+          )
+          : null}
+      </p>
+      {getAdminUser.data?.bio
+        ? (
+          <p>
+            {getAdminUser.data?.bio}
+          </p>
+        )
+        : null}
+      {getUser.data?.admin && (
+        <p className="flex gap-2">
+          <button
+            className="button-outlined"
+            onClick={() => deleteDialogRef.current?.showModal()}
+          >
+            Delete
+          </button>
+        </p>
+      )}
+      <DeleteAdminDialog
+        dialogRef={deleteDialogRef}
+        adminId={admin.tgUserId}
+        sessionId={sessionId}
+      />
+    </li>
+  );
+}
+
+function DeleteAdminDialog(props: {
+  dialogRef: React.RefObject<HTMLDialogElement>;
+  adminId: number;
+  sessionId: string | null;
+}) {
+  const { dialogRef, adminId, sessionId } = props;
+  const { mutate } = useSWRConfig();
+
+  return (
+    <dialog
+      ref={dialogRef}
+      className="dialog animate-pop-in backdrop-animate-fade-in"
+    >
+      <form
+        method="dialog"
+        className="flex flex-col gap-4 p-4"
+        onSubmit={(e) => {
+          e.preventDefault();
+
+          fetchApi("/admins/:adminId", {
+            method: "DELETE",
+            query: { sessionId: sessionId! },
+            params: { adminId: String(adminId) },
+          }).then(handleResponse).then(() => mutate(() => true));
+          dialogRef.current?.close();
+        }}
+      >
+        <p>
+          Are you sure you want to delete this admin?
+        </p>
+        <div className="flex gap-2 items-center justify-end">
+          <button
+            type="button"
+            className="button-outlined"
+            onClick={() => dialogRef.current?.close()}
+          >
+            Close
+          </button>
+          <button type="submit" className="button-filled">
+            Delete
+          </button>
+        </div>
+      </form>
+    </dialog>
+  );
+}

ui/App.tsx

@@ -1,24 +1,27 @@
 import React, { useEffect } from "react";
 import { Route, Routes } from "react-router-dom";
-import useLocalStorage from "use-local-storage";
+import { AdminsPage } from "./AdminsPage.tsx";
 import { AppHeader } from "./AppHeader.tsx";
 import { QueuePage } from "./QueuePage.tsx";
 import { SettingsPage } from "./SettingsPage.tsx";
 import { StatsPage } from "./StatsPage.tsx";
 import { WorkersPage } from "./WorkersPage.tsx";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { fetchApi, handleResponse } from "./apiClient.ts";
+import { useLocalStorage } from "./useLocalStorage.ts";
 
 export function App() {
   // store session ID in the local storage
-  const [sessionId, setSessionId] = useLocalStorage("sessionId", "");
+  const [sessionId, setSessionId] = useLocalStorage("sessionId");
 
   // initialize a new session when there is no session ID
   useEffect(() => {
     if (!sessionId) {
-      fetchApi("sessions", "POST", {}).then(handleResponse).then((session) => {
+      fetchApi("/sessions", { method: "POST" }).then((resp) => resp).then(handleResponse).then(
+        (session) => {
           console.log("Initialized session", session.id);
           setSessionId(session.id);
-      });
+        },
+      );
     }
   }, [sessionId]);
 
@@ -27,11 +30,12 @@ export function App() {
       <AppHeader
         className="self-stretch"
         sessionId={sessionId}
-        onLogOut={() => setSessionId("")}
+        onLogOut={() => setSessionId(null)}
       />
       <div className="self-center w-full max-w-screen-md flex flex-col items-stretch gap-4 p-4">
         <Routes>
           <Route path="/" element={<StatsPage />} />
+          <Route path="/admins" element={<AdminsPage sessionId={sessionId} />} />
           <Route path="/workers" element={<WorkersPage sessionId={sessionId} />} />
           <Route path="/queue" element={<QueuePage />} />
           <Route path="/settings" element={<SettingsPage sessionId={sessionId} />} />

ui/AppHeader.tsx

@@ -1,8 +1,8 @@
-import { cx } from "@twind/core";
 import React, { ReactNode } from "react";
 import { NavLink } from "react-router-dom";
 import useSWR from "swr";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { cx } from "twind/core";
+import { API_URL, fetchApi, handleResponse } from "./apiClient.ts";
 
 function NavTab(props: { to: string; children: ReactNode }) {
   return (
@@ -15,35 +15,50 @@ function NavTab(props: { to: string; children: ReactNode }) {
   );
 }
 
-export function AppHeader(
-  props: { className?: string; sessionId?: string; onLogOut: () => void },
-) {
+export function AppHeader(props: {
+  className?: string;
+  sessionId: string | null;
+  onLogOut: () => void;
+}) {
   const { className, sessionId, onLogOut } = props;
 
-  const session = useSWR(
-    sessionId ? ["sessions/{sessionId}", "GET", { params: { sessionId } }] as const : null,
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { method: "GET", params: { sessionId } }] as const : null,
     (args) => fetchApi(...args).then(handleResponse),
     { onError: () => onLogOut() },
   );
 
-  const user = useSWR(
-    session.data?.userId
-      ? ["users/{userId}", "GET", { params: { userId: String(session.data.userId) } }] as const
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", {
+        method: "GET",
+        params: { userId: String(getSession.data.userId) },
+      }] as const
       : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
 
-  const bot = useSWR(
-    ['bot',"GET",{}] as const, (args) => fetchApi(...args).then(handleResponse),
+  const getBot = useSWR(
+    ["/bot", { method: "GET" }] as const,
+    (args) => fetchApi(...args).then(handleResponse),
   );
 
-  const userPhoto = useSWR(
-    session.data?.userId
-      ? ["users/{userId}/photo", "GET", {
-        params: { userId: String(session.data.userId) },
+  const getUserPhoto = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId/photo", {
+        method: "GET",
+        params: { userId: String(getSession.data.userId) },
       }] as const
       : null,
-    (args) => fetchApi(...args).then(handleResponse).then((blob) => URL.createObjectURL(blob)),
+    () =>
+      // elysia fetch can't download file
+      fetch(`${API_URL}/users/${getSession.data?.userId}/photo`)
+        .then((response) => {
+          if (!response.ok) throw new Error(response.statusText);
+          return response;
+        })
+        .then((response) => response.blob())
+        .then((blob) => blob ? URL.createObjectURL(blob) : null),
   );
 
   return (
@@ -61,6 +76,9 @@ export function AppHeader(
         <NavTab to="/">
           Stats
         </NavTab>
+        <NavTab to="/admins">
+          Admins
+        </NavTab>
         <NavTab to="/workers">
           Workers
         </NavTab>
@@ -73,29 +91,29 @@ export function AppHeader(
       </nav>
 
       {/* loading indicator */}
-      {session.isLoading || user.isLoading ? <div className="spinner" /> : null}
+      {getSession.isLoading || getUser.isLoading ? <div className="spinner" /> : null}
 
       {/* user avatar */}
-      {user.data
-        ? userPhoto.data
+      {getUser.data
+        ? getUserPhoto.data
           ? (
             <img
-              src={userPhoto.data}
+              src={getUserPhoto.data}
               alt="avatar"
               className="w-9 h-9 rounded-full"
             />
           )
           : (
             <div className="w-9 h-9 rounded-full bg-zinc-400 dark:bg-zinc-500 flex items-center justify-center text-white text-2xl font-bold select-none">
-              {user.data.first_name.at(0)?.toUpperCase()}
+              {getUser.data.first_name.at(0)?.toUpperCase()}
             </div>
           )
         : null}
 
       {/* login/logout button */}
-      {!session.isLoading && !user.isLoading && bot.data && sessionId
+      {!getSession.isLoading && !getUser.isLoading && getBot.data && sessionId
         ? (
-          user.data
+          getUser.data
             ? (
               <button className="button-outlined" onClick={() => onLogOut()}>
                 Logout
@@ -104,7 +122,7 @@ export function AppHeader(
             : (
               <a
                 className="button-filled"
-                href={`https://t.me/${bot.data.username}?start=${sessionId}`}
+                href={`https://t.me/${getBot.data.username}?start=${sessionId}`}
                 target="_blank"
               >
                 Login

ui/Counter.tsx

@@ -1,7 +1,7 @@
-import { cx } from "@twind/core";
 import React from "react";
+import { cx } from "twind/core";
 
-function CounterDigit(props: { value: number; transitionDurationMs?: number }) {
+function CounterDigit(props: { value: number; transitionDurationMs?: number | undefined }) {
   const { value, transitionDurationMs = 1500 } = props;
   const rads = -(Math.floor(value) % 1_000_000) * 2 * Math.PI * 0.1;
 
@@ -36,10 +36,10 @@ const CounterText = (props: { children: React.ReactNode }) => (
 export function Counter(props: {
   value: number;
   digits: number;
-  fractionDigits?: number;
-  transitionDurationMs?: number;
-  className?: string;
-  postfix?: string;
+  fractionDigits?: number | undefined;
+  transitionDurationMs?: number | undefined;
+  className?: string | undefined;
+  postfix?: string | undefined;
 }) {
   const { value, digits, fractionDigits = 0, transitionDurationMs, className, postfix } = props;
 

ui/Progress.tsx

@@ -1,5 +1,5 @@
-import { cx } from "@twind/core";
 import React from "react";
+import { cx } from "twind/core";
 
 export function Progress(props: { value: number; className?: string }) {
   const { value, className } = props;

ui/QueuePage.tsx

@@ -3,11 +3,11 @@ import FlipMove from "react-flip-move";
 import useSWR from "swr";
 import { getFlagEmoji } from "../utils/getFlagEmoji.ts";
 import { Progress } from "./Progress.tsx";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { fetchApi, handleResponse } from "./apiClient.ts";
 
 export function QueuePage() {
-  const jobs = useSWR(
-    ["jobs", "GET", {}] as const,
+  const getJobs = useSWR(
+    ["/jobs", {}] as const,
     (args) => fetchApi(...args).then(handleResponse),
     { refreshInterval: 2000 },
   );
@@ -15,36 +15,43 @@ export function QueuePage() {
   return (
     <FlipMove
       typeName={"ul"}
-      className="flex flex-col items-stretch gap-2 p-2 bg-zinc-200 dark:bg-zinc-800 rounded-xl"
+      className="flex flex-col items-stretch gap-2 p-2 bg-zinc-200 dark:bg-zinc-800 rounded-md"
       enterAnimation="fade"
       leaveAnimation="fade"
     >
-      {jobs.data?.map((job) => (
+      {getJobs.data && getJobs.data.length === 0
+        ? <li key="no-jobs" className="text-center text-gray-500">Queue is empty.</li>
+        : (
+          getJobs.data?.map((job) => (
             <li
-          className="flex items-baseline gap-2 bg-zinc-100 dark:bg-zinc-700 px-2 py-1 rounded-xl"
-          key={job.id.join("/")}
+              className="flex items-baseline gap-2 bg-zinc-100 dark:bg-zinc-700 px-2 py-1 rounded-md"
+              key={job.id}
             >
-          <span className="">
-            {job.place}.
-          </span>
-          <span>{getFlagEmoji(job.state.from.language_code)}</span>
+              <span className="">{job.place}.</span>
+              <span>{getFlagEmoji(job.state.from.language_code ?? undefined)}</span>
               <strong>{job.state.from.first_name} {job.state.from.last_name}</strong>
               {job.state.from.username
                 ? (
-              <a className="link" href={`https://t.me/${job.state.from.username}`} target="_blank">
+                  <a
+                    className="link"
+                    href={`https://t.me/${job.state.from.username}`}
+                    target="_blank"
+                  >
                     @{job.state.from.username}
                   </a>
                 )
                 : null}
               <span className="flex-grow self-center h-full">
-            {job.state.progress != null &&
-              <Progress className="w-full h-full" value={job.state.progress} />}
+                {job.state.progress != null && (
+                  <Progress className="w-full h-full" value={job.state.progress} />
+                )}
               </span>
               <span className="text-sm text-zinc-500 dark:text-zinc-400">
                 {job.state.workerInstanceKey}
               </span>
             </li>
-      ))}
+          ))
+        )}
     </FlipMove>
   );
 }

ui/SettingsPage.tsx

@@ -1,79 +1,84 @@
-import { cx } from "@twind/core";
-import React, { ReactNode, useState } from "react";
+import React, { useState } from "react";
 import useSWR from "swr";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { cx } from "twind/core";
+import { fetchApi, handleResponse } from "./apiClient.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
 
-export function SettingsPage(props: { sessionId: string }) {
+export function SettingsPage(props: { sessionId: string | null }) {
   const { sessionId } = props;
-  const session = useSWR(
-    sessionId ? ["sessions/{sessionId}", "GET", { params: { sessionId } }] as const : null,
+
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { params: { sessionId } }] as const : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
-  const user = useSWR(
-    session.data?.userId
-      ? ["users/{userId}", "GET", { params: { userId: String(session.data.userId) } }] as const
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", { params: { userId: String( getSession.data.userId) } }] as const
       : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
-  const params = useSWR(
-    ["settings/params", "GET", {}] as const,
+  const getParams = useSWR(
+    ["/settings/params", {}] as const,
     (args) => fetchApi(...args).then(handleResponse),
   );
-  const [changedParams, setChangedParams] = useState<Partial<typeof params.data>>({});
-  const [error, setError] = useState<string>();
+  const [newParams, setNewParams] = useState<Partial<typeof getParams.data>>({});
+  const [patchParamsError, setPatchParamsError] = useState<string>();
 
   return (
     <form
       className="flex flex-col items-stretch gap-4"
       onSubmit={(e) => {
         e.preventDefault();
-        params.mutate(() =>
-          fetchApi("settings/params", "PATCH", {
-            query: { sessionId },
-            body: { type: "application/json", data: changedParams ?? {} },
+        getParams.mutate(() =>
+          fetchApi("/settings/params", {
+            method: "PATCH",
+            query: { sessionId: sessionId ?? "" },
+            body: omitUndef(newParams ?? {}),
           }).then(handleResponse)
         )
-          .then(() => setChangedParams({}))
-          .catch((e) => setError(String(e)));
+          .then(() => setNewParams({}))
+          .catch((e) => setPatchParamsError(String(e)));
       }}
     >
       <label className="flex flex-col items-stretch gap-1">
         <span className="text-sm">
-          Negative prompt {changedParams?.negative_prompt != null ? "(Changed)" : ""}
+          Negative prompt {newParams?.negative_prompt != null ? "(Changed)" : ""}
         </span>
         <textarea
           className="input-text"
-          disabled={params.isLoading || !user.data?.isAdmin}
-          value={changedParams?.negative_prompt ??
-            params.data?.negative_prompt ??
+          disabled={getParams.isLoading || !getUser.data?.admin}
+          value={newParams?.negative_prompt ??
+            getParams.data?.negative_prompt ??
             ""}
           onChange={(e) =>
-            setChangedParams((params) => ({
+            setNewParams((params) => ({
               ...params,
               negative_prompt: e.target.value,
             }))}
         />
       </label>
+
       <label className="flex flex-col items-stretch gap-1">
         <span className="text-sm">
-          Sampler {changedParams?.sampler_name != null ? "(Changed)" : ""}
+          Sampler {newParams?.sampler_name != null ? "(Changed)" : ""}
         </span>
         <input
           className="input-text"
-          disabled={params.isLoading || !user.data?.isAdmin}
-          value={changedParams?.sampler_name ??
-            params.data?.sampler_name ??
+          disabled={getParams.isLoading || !getUser.data?.admin}
+          value={newParams?.sampler_name ??
+            getParams.data?.sampler_name ??
             ""}
           onChange={(e) =>
-            setChangedParams((params) => ({
+            setNewParams((params) => ({
               ...params,
               sampler_name: e.target.value,
             }))}
         />
       </label>
+
       <label className="flex flex-col items-stretch gap-1">
         <span className="text-sm">
-          Steps {changedParams?.steps != null ? "(Changed)" : ""}
+          Steps {newParams?.steps != null ? "(Changed)" : ""}
         </span>
         <span className="flex items-center gap-1">
           <input
@@ -82,12 +87,12 @@ export function SettingsPage(props: { sessionId: string }) {
             min={5}
             max={50}
             step={5}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.steps ??
-              params.data?.steps ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.steps ??
+              getParams.data?.steps ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 steps: Number(e.target.value),
               }))}
@@ -98,21 +103,22 @@ export function SettingsPage(props: { sessionId: string }) {
             min={5}
             max={50}
             step={5}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.steps ??
-              params.data?.steps ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.steps ??
+              getParams.data?.steps ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 steps: Number(e.target.value),
               }))}
           />
         </span>
       </label>
+
       <label className="flex flex-col items-stretch gap-1">
         <span className="text-sm">
-          Detail {changedParams?.cfg_scale != null ? "(Changed)" : ""}
+          Detail {newParams?.cfg_scale != null ? "(Changed)" : ""}
         </span>
         <span className="flex items-center gap-1">
           <input
@@ -121,12 +127,12 @@ export function SettingsPage(props: { sessionId: string }) {
             min={1}
             max={20}
             step={1}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.cfg_scale ??
-              params.data?.cfg_scale ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.cfg_scale ??
+              getParams.data?.cfg_scale ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 cfg_scale: Number(e.target.value),
               }))}
@@ -137,22 +143,23 @@ export function SettingsPage(props: { sessionId: string }) {
             min={1}
             max={20}
             step={1}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.cfg_scale ??
-              params.data?.cfg_scale ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.cfg_scale ??
+              getParams.data?.cfg_scale ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 cfg_scale: Number(e.target.value),
               }))}
           />
         </span>
       </label>
+
       <div className="flex gap-4">
         <label className="flex flex-1 flex-col items-stretch gap-1">
           <span className="text-sm">
-            Width {changedParams?.width != null ? "(Changed)" : ""}
+            Width {newParams?.width != null ? "(Changed)" : ""}
           </span>
           <input
             className="input-text"
@@ -160,12 +167,12 @@ export function SettingsPage(props: { sessionId: string }) {
             min={64}
             max={2048}
             step={64}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.width ??
-              params.data?.width ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.width ??
+              getParams.data?.width ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 width: Number(e.target.value),
               }))}
@@ -176,12 +183,12 @@ export function SettingsPage(props: { sessionId: string }) {
             min={64}
             max={2048}
             step={64}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.width ??
-              params.data?.width ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.width ??
+              getParams.data?.width ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 width: Number(e.target.value),
               }))}
@@ -189,7 +196,7 @@ export function SettingsPage(props: { sessionId: string }) {
         </label>
         <label className="flex flex-1 flex-col items-stretch gap-1">
           <span className="text-sm">
-            Height {changedParams?.height != null ? "(Changed)" : ""}
+            Height {newParams?.height != null ? "(Changed)" : ""}
           </span>
           <input
             className="input-text"
@@ -197,12 +204,12 @@ export function SettingsPage(props: { sessionId: string }) {
             min={64}
             max={2048}
             step={64}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.height ??
-              params.data?.height ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.height ??
+              getParams.data?.height ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 height: Number(e.target.value),
               }))}
@@ -213,35 +220,54 @@ export function SettingsPage(props: { sessionId: string }) {
             min={64}
             max={2048}
             step={64}
-            disabled={params.isLoading || !user.data?.isAdmin}
-            value={changedParams?.height ??
-              params.data?.height ??
+            disabled={getParams.isLoading || !getUser.data?.admin}
+            value={newParams?.height ??
+              getParams.data?.height ??
               0}
             onChange={(e) =>
-              setChangedParams((params) => ({
+              setNewParams((params) => ({
                 ...params,
                 height: Number(e.target.value),
               }))}
           />
         </label>
       </div>
-      {error ? <Alert onClose={() => setError(undefined)}>{error}</Alert> : null}
-      {params.error ? <Alert>{params.error.message}</Alert> : null}
+
+      {patchParamsError
+        ? (
+          <p className="alert">
+            <span className="flex-grow">Updating params failed: {patchParamsError}</span>
+            <button className="button-ghost" onClick={() => setPatchParamsError(undefined)}>
+              Close
+            </button>
+          </p>
+        )
+        : null}
+      {getParams.error
+        ? (
+          <p className="alert">
+            <span className="flex-grow">
+              Loading params failed: {String(getParams.error)}
+            </span>
+          </p>
+        )
+        : null}
+
       <div className="flex gap-2 items-center justify-end">
         <button
           type="button"
-          className={cx("button-outlined ripple", params.isLoading && "bg-stripes")}
-          disabled={params.isLoading || !user.data?.isAdmin ||
-            Object.keys(changedParams ?? {}).length === 0}
-          onClick={() => setChangedParams({})}
+          className={cx("button-outlined ripple", getParams.isLoading && "bg-stripes")}
+          disabled={getParams.isLoading || !getUser.data?.admin ||
+            Object.keys(newParams ?? {}).length === 0}
+          onClick={() => setNewParams({})}
         >
           Reset
         </button>
         <button
           type="submit"
-          className={cx("button-filled ripple", params.isLoading && "bg-stripes")}
-          disabled={params.isLoading || !user.data?.isAdmin ||
-            Object.keys(changedParams ?? {}).length === 0}
+          className={cx("button-filled ripple", getParams.isLoading && "bg-stripes")}
+          disabled={getParams.isLoading || !getUser.data?.admin ||
+            Object.keys(newParams ?? {}).length === 0}
         >
           Save
         </button>
@@ -249,26 +275,3 @@ export function SettingsPage(props: { sessionId: string }) {
     </form>
   );
 }
-
-function Alert(props: { children: ReactNode; onClose?: () => void }) {
-  const { children, onClose } = props;
-  return (
-    <p
-      role="alert"
-      className="px-4 py-2 flex gap-2 items-center bg-red-500 text-white rounded-sm shadow-md"
-    >
-      <span className="flex-grow">{children}</span>
-      {onClose
-        ? (
-          <button
-            type="button"
-            className="button-ghost"
-            onClick={() => onClose()}
-          >
-            Close
-          </button>
-        )
-        : null}
-    </p>
-  );
-}

ui/StatsPage.tsx

@@ -1,11 +1,11 @@
 import React from "react";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { fetchApi, handleResponse } from "./apiClient.ts";
 import useSWR from "swr";
 import { Counter } from "./Counter.tsx";
 
 export function StatsPage() {
-  const globalStats = useSWR(
-    ["stats", "GET", {}] as const,
+  const getGlobalStats = useSWR(
+    ["/stats", {}] as const,
     (args) => fetchApi(...args).then(handleResponse),
     { refreshInterval: 2_000 },
   );
@@ -16,13 +16,13 @@ export function StatsPage() {
         <span>Pixelsteps diffused</span>
         <Counter
           className="font-bold text-zinc-700 dark:text-zinc-300"
-          value={globalStats.data?.pixelStepCount ?? 0}
+          value={getGlobalStats.data?.pixelStepCount ?? 0}
           digits={15}
           transitionDurationMs={3_000}
         />
         <Counter
           className="text-base"
-          value={(globalStats.data?.pixelStepsPerMinute ?? 0) / 60}
+          value={(getGlobalStats.data?.pixelStepsPerMinute ?? 0) / 60}
           digits={9}
           transitionDurationMs={2_000}
           postfix="/s"
@@ -32,13 +32,13 @@ export function StatsPage() {
         <span>Pixels painted</span>
         <Counter
           className="font-bold text-zinc-700 dark:text-zinc-300"
-          value={globalStats.data?.pixelCount ?? 0}
+          value={getGlobalStats.data?.pixelCount ?? 0}
           digits={15}
           transitionDurationMs={3_000}
         />
         <Counter
           className="text-base"
-          value={(globalStats.data?.pixelsPerMinute ?? 0) / 60}
+          value={(getGlobalStats.data?.pixelsPerMinute ?? 0) / 60}
           digits={9}
           transitionDurationMs={2_000}
           postfix="/s"
@@ -49,13 +49,13 @@ export function StatsPage() {
           <span>Steps processed</span>
           <Counter
             className="font-bold text-zinc-700 dark:text-zinc-300"
-            value={globalStats.data?.stepCount ?? 0}
+            value={getGlobalStats.data?.stepCount ?? 0}
             digits={9}
             transitionDurationMs={3_000}
           />
           <Counter
             className="text-base"
-            value={(globalStats.data?.stepsPerMinute ?? 0) / 60}
+            value={(getGlobalStats.data?.stepsPerMinute ?? 0) / 60}
             digits={3}
             fractionDigits={3}
             transitionDurationMs={2_000}
@@ -66,13 +66,13 @@ export function StatsPage() {
           <span>Images generated</span>
           <Counter
             className="font-bold text-zinc-700 dark:text-zinc-300"
-            value={globalStats.data?.imageCount ?? 0}
+            value={getGlobalStats.data?.imageCount ?? 0}
             digits={9}
             transitionDurationMs={3_000}
           />
           <Counter
             className="text-base"
-            value={(globalStats.data?.imagesPerMinute ?? 0) / 60}
+            value={(getGlobalStats.data?.imagesPerMinute ?? 0) / 60}
             digits={3}
             fractionDigits={3}
             transitionDurationMs={2_000}
@@ -84,7 +84,7 @@ export function StatsPage() {
         <span>Unique users</span>
         <Counter
           className="font-bold text-zinc-700 dark:text-zinc-300"
-          value={globalStats.data?.userCount ?? 0}
+          value={getGlobalStats.data?.userCount ?? 0}
           digits={6}
           transitionDurationMs={1_500}
         />

ui/WorkersPage.tsx

@@ -1,51 +1,81 @@
-import React, { useRef } from "react";
+import React, { RefObject, useRef } from "react";
 import { FormattedRelativeTime } from "react-intl";
 import useSWR, { useSWRConfig } from "swr";
-import { WorkerData } from "../api/workersRoute.ts";
+import { WorkerResponse } from "../api/workersRoute.ts";
 import { Counter } from "./Counter.tsx";
-import { fetchApi, handleResponse } from "./apiClient.tsx";
+import { fetchApi, handleResponse } from "./apiClient.ts";
 
-export function WorkersPage(props: { sessionId?: string }) {
+export function WorkersPage(props: { sessionId: string | null }) {
   const { sessionId } = props;
 
-  const createWorkerModalRef = useRef<HTMLDialogElement>(null);
+  const addDialogRef = useRef<HTMLDialogElement>(null);
 
-  const session = useSWR(
-    sessionId ? ["sessions/{sessionId}", "GET", { params: { sessionId } }] as const : null,
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { params: { sessionId } }] as const : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
-  const user = useSWR(
-    session.data?.userId
-      ? ["users/{userId}", "GET", { params: { userId: String(session.data.userId) } }] as const
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", { params: { userId: String(getSession.data.userId) } }] as const
       : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
 
-  const workers = useSWR(
-    ["workers", "GET", {}] as const,
+  const getWorkers = useSWR(
+    ["/workers", { method: "GET" }] as const,
     (args) => fetchApi(...args).then(handleResponse),
     { refreshInterval: 5000 },
   );
 
   return (
     <>
-      <ul className="my-4 flex flex-col gap-2">
-        {workers.data?.map((worker) => (
+      {getWorkers.data?.length
+        ? (
+          <ul className="flex flex-col gap-2">
+            {getWorkers.data?.map((worker) => (
               <WorkerListItem key={worker.id} worker={worker} sessionId={sessionId} />
             ))}
           </ul>
-      {user.data?.isAdmin && (
+        )
+        : getWorkers.data?.length === 0
+        ? (
+          <ul className="flex flex-col gap-2">
+            <li className="flex flex-col gap-2 rounded-md bg-zinc-100 dark:bg-zinc-800 p-2">
+              <p key="no-workers" className="text-center text-gray-500">No workers.</p>
+            </li>
+          </ul>
+        )
+        : getWorkers.error
+        ? <p className="alert">Loading workers failed</p>
+        : <div className="spinner self-center" />}
+
+      {getUser.data?.admin && (
         <button
           className="button-filled"
-          onClick={() => createWorkerModalRef.current?.showModal()}
+          onClick={() => addDialogRef.current?.showModal()}
         >
           Add worker
         </button>
       )}
-      <dialog
-        className="dialog"
-        ref={createWorkerModalRef}
-      >
+
+      <AddWorkerDialog
+        dialogRef={addDialogRef}
+        sessionId={sessionId}
+      />
+    </>
+  );
+}
+
+function AddWorkerDialog(props: {
+  dialogRef: RefObject<HTMLDialogElement>;
+  sessionId: string | null;
+}) {
+  const { dialogRef, sessionId } = props;
+
+  const { mutate } = useSWRConfig();
+
+  return (
+    <dialog ref={dialogRef} className="dialog animate-pop-in backdrop-animate-fade-in">
       <form
         method="dialog"
         className="flex flex-col gap-4 p-4"
@@ -58,23 +88,17 @@ export function WorkersPage(props: { sessionId?: string }) {
           const user = data.get("user") as string;
           const password = data.get("password") as string;
           console.log(key, name, user, password);
-            workers.mutate(async () => {
-              const worker = await fetchApi("workers", "POST", {
+          fetchApi("/workers", {
+            method: "POST",
             query: { sessionId: sessionId! },
             body: {
-                  type: "application/json",
-                  data: {
               key,
               name: name || null,
               sdUrl,
               sdAuth: user && password ? { user, password } : null,
             },
-                },
-              }).then(handleResponse);
-              return [...(workers.data ?? []), worker];
-            });
-
-            createWorkerModalRef.current?.close();
+          }).then(handleResponse).then(() => mutate(() => true));
+          dialogRef.current?.close();
         }}
       >
         <div className="flex gap-4">
@@ -145,7 +169,7 @@ export function WorkersPage(props: { sessionId?: string }) {
           <button
             type="button"
             className="button-outlined"
-              onClick={() => createWorkerModalRef.current?.close()}
+            onClick={() => dialogRef.current?.close()}
           >
             Close
           </button>
@@ -155,28 +179,28 @@ export function WorkersPage(props: { sessionId?: string }) {
         </div>
       </form>
     </dialog>
-    </>
   );
 }
 
-function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
+function WorkerListItem(props: {
+  worker: WorkerResponse;
+  sessionId: string | null;
+}) {
   const { worker, sessionId } = props;
-  const editWorkerModalRef = useRef<HTMLDialogElement>(null);
-  const deleteWorkerModalRef = useRef<HTMLDialogElement>(null);
+  const editDialogRef = useRef<HTMLDialogElement>(null);
+  const deleteDialogRef = useRef<HTMLDialogElement>(null);
 
-  const session = useSWR(
-    sessionId ? ["sessions/{sessionId}", "GET", { params: { sessionId } }] as const : null,
+  const getSession = useSWR(
+    sessionId ? ["/sessions/:sessionId", { params: { sessionId } }] as const : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
-  const user = useSWR(
-    session.data?.userId
-      ? ["users/{userId}", "GET", { params: { userId: String(session.data.userId) } }] as const
+  const getUser = useSWR(
+    getSession.data?.userId
+      ? ["/users/:userId", { params: { userId: String(getSession.data.userId) } }] as const
       : null,
     (args) => fetchApi(...args).then(handleResponse),
   );
 
-  const { mutate } = useSWRConfig();
-
   return (
     <li className="flex flex-col gap-2 rounded-md bg-zinc-100 dark:bg-zinc-800 p-2">
       <p className="font-bold">
@@ -212,27 +236,49 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
         {" "}
         <Counter value={worker.stepsPerMinute} digits={3} /> steps per minute
       </p>
+      {getUser.data?.admin && (
         <p className="flex gap-2">
-        {user.data?.isAdmin && (
-          <>
           <button
             className="button-outlined"
-              onClick={() => editWorkerModalRef.current?.showModal()}
+            onClick={() => editDialogRef.current?.showModal()}
           >
             Settings
           </button>
           <button
             className="button-outlined"
-              onClick={() => deleteWorkerModalRef.current?.showModal()}
+            onClick={() => deleteDialogRef.current?.showModal()}
           >
             Delete
           </button>
-          </>
-        )}
         </p>
+      )}
+      <EditWorkerDialog
+        dialogRef={editDialogRef}
+        workerId={worker.id}
+        sessionId={sessionId}
+      />
+      <DeleteWorkerDialog
+        dialogRef={deleteDialogRef}
+        workerId={worker.id}
+        sessionId={sessionId}
+      />
+    </li>
+  );
+}
+
+function EditWorkerDialog(props: {
+  dialogRef: RefObject<HTMLDialogElement>;
+  workerId: string;
+  sessionId: string | null;
+}) {
+  const { dialogRef, workerId, sessionId } = props;
+
+  const { mutate } = useSWRConfig();
+
+  return (
     <dialog
-        className="dialog"
-        ref={editWorkerModalRef}
+      className="dialog animate-pop-in backdrop-animate-fade-in"
+      ref={dialogRef}
     >
       <form
         method="dialog"
@@ -243,17 +289,15 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
           const user = data.get("user") as string;
           const password = data.get("password") as string;
           console.log(user, password);
-            fetchApi("workers/{workerId}", "PATCH", {
-              params: { workerId: worker.id },
+          fetchApi("/workers/:workerId", {
+            method: "PATCH",
+            params: { workerId: workerId },
             query: { sessionId: sessionId! },
             body: {
-                type: "application/json",
-                data: {
-                  auth: user && password ? { user, password } : null,
+              sdAuth: user && password ? { user, password } : null,
             },
-              },
-            });
-            editWorkerModalRef.current?.close();
+          }).then(handleResponse).then(() => mutate(() => true));
+          dialogRef.current?.close();
         }}
       >
         <div className="flex gap-4">
@@ -282,7 +326,7 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
           <button
             type="button"
             className="button-outlined"
-              onClick={() => editWorkerModalRef.current?.close()}
+            onClick={() => dialogRef.current?.close()}
           >
             Close
           </button>
@@ -292,20 +336,33 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
         </div>
       </form>
     </dialog>
+  );
+}
+
+function DeleteWorkerDialog(props: {
+  dialogRef: RefObject<HTMLDialogElement>;
+  workerId: string;
+  sessionId: string | null;
+}) {
+  const { dialogRef, workerId, sessionId } = props;
+  const { mutate } = useSWRConfig();
+
+  return (
     <dialog
-        className="dialog"
-        ref={deleteWorkerModalRef}
+      className="dialog animate-pop-in backdrop-animate-fade-in"
+      ref={dialogRef}
     >
       <form
         method="dialog"
         className="flex flex-col gap-4 p-4"
         onSubmit={(e) => {
           e.preventDefault();
-            fetchApi("workers/{workerId}", "DELETE", {
-              params: { workerId: worker.id },
+          fetchApi("/workers/:workerId", {
+            method: "DELETE",
+            params: { workerId: workerId },
             query: { sessionId: sessionId! },
-            }).then(handleResponse).then(() => mutate(["workers", "GET", {}]));
-            deleteWorkerModalRef.current?.close();
+          }).then(handleResponse).then(() => mutate(() => true));
+          dialogRef.current?.close();
         }}
       >
         <p>
@@ -315,7 +372,7 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
           <button
             type="button"
             className="button-outlined"
-              onClick={() => deleteWorkerModalRef.current?.close()}
+            onClick={() => dialogRef.current?.close()}
           >
             Close
           </button>
@@ -325,6 +382,5 @@ function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
         </div>
       </form>
     </dialog>
-    </li>
   );
 }

ui/apiClient.ts

@@ -0,0 +1,19 @@
+import { edenFetch } from "elysia/eden";
+import { Api } from "../api/serveApi.ts";
+
+export const API_URL = "/api";
+
+export const fetchApi = edenFetch<Api>(API_URL);
+
+export function handleResponse<
+  T extends
+    | { data: unknown; error: null }
+    | { data: null; error: { status: number; value: unknown } },
+>(
+  response: T,
+): (T & { error: null })["data"] {
+  if (response.error) {
+    throw new Error(`${response.error?.status}: ${response.error?.value}`);
+  }
+  return response.data;
+}

ui/apiClient.tsx

@@ -1,15 +0,0 @@
-import { createFetcher, Output } from "t_rest/client";
-import { ApiHandler } from "../api/serveApi.ts";
-
-export const fetchApi = createFetcher<ApiHandler>({
-  baseUrl: `${location.origin}/api/`,
-});
-
-export function handleResponse<T extends Output>(
-  response: T,
-): (T & { status: 200 })["body"]["data"] {
-  if (response.status !== 200) {
-    throw new Error(String(response.body.data));
-  }
-  return response.body.data;
-}

ui/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /

ui/twind.ts

@@ -1,11 +1,12 @@
-import { defineConfig, injectGlobal, install } from "@twind/core";
-import presetTailwind from "@twind/preset-tailwind";
+import { defineConfig, injectGlobal, install } from "twind/core";
+import presetTailwind from "twind/preset-tailwind";
 
 const twConfig = defineConfig({
   presets: [presetTailwind()],
+  hash: false,
 });
 
-install(twConfig);
+install(twConfig, false);
 
 injectGlobal`
   @layer base {
@@ -27,14 +28,11 @@ injectGlobal`
         rgba(0, 0, 0, 0.1) 14px,
         rgba(0, 0, 0, 0.1) 28px
       );
-      animation: bg-stripes-scroll 0.5s linear infinite;
+      animation: bg-scroll 0.5s linear infinite;
       background-size: 40px 40px;
     }
-    @keyframes bg-stripes-scroll {
-      0% {
-        background-position: 0 40px;
-      }
-      100% {
+    @keyframes bg-scroll {
+      to {
         background-position: 40px 0;
       }
     }
@@ -63,11 +61,11 @@ injectGlobal`
         opacity 0s;
     }
 
-    .animate-fade-in {
+    .backdrop-animate-fade-in::backdrop {
       animation: fade-in 0.3s ease-out forwards;
     }
     @keyframes fade-in {
-      0% {
+      from {
         opacity: 0;
       }
     }
@@ -76,7 +74,7 @@ injectGlobal`
       animation: pop-in 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
     }
     @keyframes pop-in {
-      0% {
+      from {
         transform: scale(0.8);
         opacity: 0;
       }
@@ -92,6 +90,10 @@ injectGlobal`
       @apply h-8 w-8 animate-spin rounded-full border-4 border-transparent border-t-current;
     }
 
+    .alert {
+      @apply px-4 py-2 flex gap-2 items-center bg-red-500 text-white rounded-sm shadow-md;
+    }
+
     .button-filled {
       @apply rounded-md bg-sky-600 px-3 py-2 min-h-12
         text-sm font-semibold uppercase tracking-wider text-white shadow-sm transition-all 
@@ -114,7 +116,7 @@ injectGlobal`
     }
 
     .tab {
-      @apply inline-flex items-center px-4 text-sm text-center bg-transparent border-b-2 sm:text-base whitespace-nowrap focus:outline-none
+      @apply inline-flex items-center px-4 text-sm text-center bg-transparent border-b-2 sm:text-base whitespace-nowrap outline-none
         border-transparent dark:text-white cursor-base hover:border-zinc-400 focus:border-zinc-400 transition-all;
     }
 
@@ -134,8 +136,8 @@ injectGlobal`
     }
 
     .dialog {
-      @apply animate-pop-in backdrop:animate-fade-in overflow-hidden overflow-y-auto rounded-md 
-        bg-zinc-100 text-zinc-900 shadow-lg backdrop:bg-black/20 dark:bg-zinc-800 dark:text-zinc-100;
+      @apply overflow-hidden overflow-y-auto rounded-md shadow-xl
+        bg-white text-zinc-900 shadow-lg backdrop:bg-black/30 dark:bg-zinc-800 dark:text-zinc-100;
     }
   }
 `;

ui/useLocalStorage.ts

@@ -0,0 +1,31 @@
+import { useEffect, useState } from "react";
+
+export function useLocalStorage(key: string) {
+  const [value, setValue] = useState(() => window.localStorage.getItem(key));
+
+  useEffect(() => {
+    console.log(key, value);
+    if (value != null) {
+      window.localStorage.setItem(key, value);
+    } else {
+      window.localStorage.removeItem(key);
+    }
+  }, [key, value]);
+
+  useEffect(() => {
+    const handleStorage = (event: StorageEvent) => {
+      if (event.key === key) {
+        console.log(key, event.newValue);
+        setValue(event.newValue);
+      }
+    };
+
+    window.addEventListener("storage", handleStorage);
+
+    return () => {
+      window.removeEventListener("storage", handleStorage);
+    };
+  }, [key]);
+
+  return [value, setValue] as const;
+}

utils/Tkv.ts

@@ -0,0 +1,76 @@
+export type TkvEntry<K extends Deno.KvKey, T> = {
+  key: readonly [...K];
+  value: T;
+  versionstamp: string;
+};
+
+export type TkvEntryMaybe<K extends Deno.KvKey, T> = TkvEntry<K, T> | {
+  key: readonly [...K];
+  value: null;
+  versionstamp: null;
+};
+
+export type TkvListSelector<K extends Deno.KvKey> =
+  | { prefix: KvKeyPrefix<K> }
+  | { prefix: KvKeyPrefix<K>; start: readonly [...K] }
+  | { prefix: KvKeyPrefix<K>; end: readonly [...K] }
+  | { start: readonly [...K]; end: readonly [...K] };
+
+export type KvKeyPrefix<Key extends Deno.KvKey> = Key extends readonly [infer Prefix, ...infer Rest]
+  ? readonly [Prefix] | readonly [Prefix, ...Rest]
+  : never;
+
+/**
+ * Typed wrapper for {@link Deno.Kv}
+ */
+export class Tkv<K extends Deno.KvKey, T> {
+  constructor(readonly db: Deno.Kv) {}
+
+  get(
+    key: readonly [...K],
+    options: Parameters<Deno.Kv["get"]>[1] = {},
+  ): Promise<TkvEntryMaybe<K, T>> {
+    return this.db.get<T>(key, options) as any;
+  }
+
+  set(
+    key: readonly [...K],
+    value: T,
+    options: Parameters<Deno.Kv["set"]>[2] = {},
+  ): ReturnType<Deno.Kv["set"]> {
+    return this.db.set(key, value, options);
+  }
+
+  atomicSet(
+    key: readonly [...K],
+    versionstamp: Parameters<Deno.AtomicOperation["check"]>[0]["versionstamp"],
+    value: T,
+    options: Parameters<Deno.AtomicOperation["set"]>[2] = {},
+  ): ReturnType<Deno.AtomicOperation["commit"]> {
+    return this.db.atomic()
+      .check({ key, versionstamp })
+      .set(key, value, options)
+      .commit();
+  }
+
+  delete(key: readonly [...K]): ReturnType<Deno.Kv["delete"]> {
+    return this.db.delete(key);
+  }
+
+  atomicDelete(
+    key: readonly [...K],
+    versionstamp: Parameters<Deno.AtomicOperation["check"]>[0]["versionstamp"],
+  ): ReturnType<Deno.AtomicOperation["commit"]> {
+    return this.db.atomic()
+      .check({ key, versionstamp })
+      .delete(key)
+      .commit();
+  }
+
+  list(
+    selector: TkvListSelector<K>,
+    options: Parameters<Deno.Kv["list"]>[1] = {},
+  ): AsyncIterableIterator<TkvEntry<K, T>> {
+    return this.db.list<T>(selector as Deno.KvListSelector, options) as any;
+  }
+}

utils/formatUserChat.ts

@@ -1,7 +1,11 @@
 import { Chat, User } from "grammy_types";
 
 export function formatUserChat(
-  ctx: { from?: User; chat?: Chat; workerInstanceKey?: string },
+  ctx: {
+    from?: User | undefined;
+    chat?: Chat | undefined;
+    workerInstanceKey?: string | undefined;
+  },
 ) {
   const msg: string[] = [];
   if (ctx.from) {

utils/kvMemoize.ts

@@ -0,0 +1,68 @@
+export interface KvMemoizeOptions<A extends Deno.KvKey, R> {
+  /**
+   * The time in milliseconds until the cached result expires.
+   */
+  expireIn?: ((result: R, ...args: A) => number) | number | undefined;
+  /**
+   * Whether to recalculate the result if it was already cached.
+   *
+   * Runs whenever the result is retrieved from the cache.
+   */
+  shouldRecalculate?: ((result: R, ...args: A) => boolean) | undefined;
+  /**
+   * Whether to cache the result after computing it.
+   *
+   * Runs whenever a new result is computed.
+   */
+  shouldCache?: ((result: R, ...args: A) => boolean) | undefined;
+  /**
+   * Override the default KV store functions.
+   */
+  override?: {
+    set: (
+      key: Deno.KvKey,
+      args: A,
+      value: R,
+      options: { expireIn?: number },
+    ) => Promise<void>;
+    get: (key: Deno.KvKey, args: A) => Promise<R | undefined>;
+  };
+}
+
+/**
+ * Memoizes the function result in KV store.
+ */
+export function kvMemoize<A extends Deno.KvKey, R>(
+  db: Deno.Kv,
+  key: Deno.KvKey,
+  fn: (...args: A) => Promise<R>,
+  options?: KvMemoizeOptions<A, R>,
+): (...args: A) => Promise<R> {
+  return async (...args) => {
+    const cachedResult = options?.override?.get
+      ? await options.override.get(key, args)
+      : (await db.get<R>([...key, ...args])).value;
+
+    if (cachedResult != null) {
+      if (!options?.shouldRecalculate?.(cachedResult, ...args)) {
+        return cachedResult;
+      }
+    }
+
+    const result = await fn(...args);
+
+    const expireIn = typeof options?.expireIn === "function"
+      ? options.expireIn(result, ...args)
+      : options?.expireIn;
+
+    if (options?.shouldCache?.(result, ...args) ?? (result != null)) {
+      if (options?.override?.set) {
+        await options.override.set(key, args, result, expireIn != null ? { expireIn } : {});
+      } else {
+        await db.set([...key, ...args], result, expireIn != null ? { expireIn } : {});
+      }
+    }
+
+    return result;
+  };
+}

utils/omitUndef.ts

@@ -0,0 +1,11 @@
+/**
+ * Removes all undefined properties from an object.
+ */
+export function omitUndef<O extends object | undefined>(object: O):
+  & { [K in keyof O as undefined extends O[K] ? never : K]: O[K] }
+  & { [K in keyof O as undefined extends O[K] ? K : never]?: O[K] & ({} | null) } {
+  if (object == undefined) return object as never;
+  return Object.fromEntries(
+    Object.entries(object).filter(([, v]) => v !== undefined),
+  ) as never;
+}