exactOptionalPropertyTypes

api/mod.ts

@@ -1,7 +1,7 @@
 import { route } from "reroute";
 import { serveSpa } from "serve_spa";
 import { serveApi } from "./serveApi.ts";
-import { fromFileUrl } from "std/path/mod.ts"
+import { fromFileUrl } from "std/path/mod.ts";
 
 export async function serveUi() {
   const server = Deno.serve({ port: 5999 }, (request) =>

api/sessionsRoute.ts

@@ -4,7 +4,7 @@ import { ulid } from "ulid";
 export const sessions = new Map<string, Session>();
 
 export interface Session {
-  userId?: number;
+  userId?: number | undefined;
 }
 
 export const sessionsRoute = createPathFilter({
@@ -24,7 +24,7 @@ export const sessionsRoute = createPathFilter({
     GET: createEndpoint(
       { query: null, body: null },
       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" } };

api/usersRoute.ts

@@ -7,7 +7,7 @@ export const usersRoute = createPathFilter({
     GET: createEndpoint(
       { query: null, body: null },
       async ({ params }) => {
-        const chat = await bot.api.getChat(params.userId);
+        const chat = await bot.api.getChat(params.userId!);
         if (chat.type !== "private") {
           throw new Error("Chat is not private");
         }
@@ -36,7 +36,7 @@ export const usersRoute = createPathFilter({
     GET: createEndpoint(
       { query: null, body: null },
       async ({ params }) => {
-        const chat = await bot.api.getChat(params.userId);
+        const chat = await bot.api.getChat(params.userId!);
         if (chat.type !== "private") {
           throw new Error("Chat is not private");
         }

api/workersRoute.ts

@@ -12,6 +12,7 @@ import {
   workerInstanceStore,
 } from "../app/workerInstanceStore.ts";
 import { getAuthHeader } from "../utils/getAuthHeader.ts";
+import { omitUndef } from "../utils/omitUndef.ts";
 import { withUser } from "./withUser.ts";
 
 export type WorkerData = Omit<WorkerInstance, "sdUrl" | "sdAuth"> & {
@@ -105,7 +106,7 @@ export const workersRoute = createPathFilter({
       GET: createEndpoint(
         { query: null, body: null },
         async ({ params }) => {
-          const workerInstance = await workerInstanceStore.getById(params.workerId);
+          const workerInstance = await workerInstanceStore.getById(params.workerId!);
           if (!workerInstance) {
             return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
           }
@@ -126,7 +127,7 @@ export const workersRoute = createPathFilter({
           },
         },
         async ({ params, query, body }) => {
-          const workerInstance = await workerInstanceStore.getById(params.workerId);
+          const workerInstance = await workerInstanceStore.getById(params.workerId!);
           if (!workerInstance) {
             return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
           }
@@ -136,7 +137,7 @@ export const workersRoute = createPathFilter({
                 JSON.stringify(body.data)
               }`,
             );
-            await workerInstance.update(body.data);
+            await workerInstance.update(omitUndef(body.data));
             return {
               status: 200,
               body: { type: "application/json", data: await getWorkerData(workerInstance) },
@@ -152,7 +153,7 @@ export const workersRoute = createPathFilter({
           body: null,
         },
         async ({ params, query }) => {
-          const workerInstance = await workerInstanceStore.getById(params.workerId);
+          const workerInstance = await workerInstanceStore.getById(params.workerId!);
           if (!workerInstance) {
             return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
           }
@@ -169,7 +170,7 @@ export const workersRoute = createPathFilter({
       GET: createEndpoint(
         { query: null, body: null },
         async ({ params }) => {
-          const workerInstance = await workerInstanceStore.getById(params.workerId);
+          const workerInstance = await workerInstanceStore.getById(params.workerId!);
           if (!workerInstance) {
             return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
           }
@@ -200,7 +201,7 @@ export const workersRoute = createPathFilter({
       GET: createEndpoint(
         { query: null, body: null },
         async ({ params }) => {
-          const workerInstance = await workerInstanceStore.getById(params.workerId);
+          const workerInstance = await workerInstanceStore.getById(params.workerId!);
           if (!workerInstance) {
             return { status: 404, body: { type: "text/plain", data: `Worker not found` } };
           }

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";
@@ -161,7 +162,7 @@ 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 +183,18 @@ 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 +210,7 @@ async function processGenerationJob(
             ).then((resp) => resp.arrayBuffer()),
           ),
         ],
-      },
+      }),
     })
     : undefined;
 

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
+  sdInstanceId?: string | undefined; // TODO: change to workerInstanceKey
-  info?: SdGenerationInfo;
+  info?: SdGenerationInfo | undefined;
-  startDate?: Date;
+  startDate?: Date | undefined;
-  endDate?: Date;
+  endDate?: Date | undefined;
 }
 
 /**

app/kvMemoize.ts

@@ -1,19 +1,42 @@
+export interface KvMemoizeOptions<A extends Deno.KvKey, R> {
   /**
- * Memoizes the function result in KV storage.
+   * 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?: {
+  options?: KvMemoizeOptions<A, R>,
-    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
@@ -34,9 +57,9 @@ export function kvMemoize<A extends Deno.KvKey, R>(
 
     if (options?.shouldCache?.(result, ...args) ?? (result != null)) {
       if (options?.override?.set) {
-        await options.override.set(key, args, result, { expireIn });
+        await options.override.set(key, args, result, expireIn != null ? { expireIn } : {});
       } else {
-        await db.set([...key, ...args], result, { expireIn });
+        await db.set([...key, ...args], result, expireIn != null ? { expireIn } : {});
       }
     }
 

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,

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/mod.ts

@@ -6,6 +6,7 @@ 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 +20,11 @@ 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 +95,13 @@ 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;
     }
@@ -122,24 +126,33 @@ 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);

bot/parsePngInfo.ts

@@ -25,7 +25,11 @@ interface PngInfoExtra extends PngInfo {
   upscale?: number;
 }
 
-export function parsePngInfo(pngInfo: string, baseParams?: Partial<PngInfo>, shouldParseSeed?: boolean): Partial<PngInfo> {
+export function parsePngInfo(
+  pngInfo: string,
+  baseParams?: Partial<PngInfo>,
+  shouldParseSeed?: boolean,
+): Partial<PngInfo> {
   const tags = pngInfo.split(/[,;]+|\.+\s|\n/u);
   let part: "prompt" | "negative_prompt" | "params" = "prompt";
   const params: Partial<PngInfoExtra> = {};
@@ -34,7 +38,7 @@ export function parsePngInfo(pngInfo: string, baseParams?: Partial<PngInfo>, sho
   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":
@@ -67,7 +71,7 @@ export function parsePngInfo(pngInfo: string, baseParams?: Partial<PngInfo>, sho
         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);
@@ -103,10 +107,12 @@ export function parsePngInfo(pngInfo: string, baseParams?: Partial<PngInfo>, sho
           part = "params";
           if (shouldParseSeed) {
             const seed = Number(value.trim());
+            if (Number.isFinite(seed)) {
               params.seed = seed;
-            break;
             }
           }
+          break;
+        }
         case "model":
         case "modelhash":
         case "modelname":

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";
 
@@ -23,11 +24,13 @@ async function pnginfo(ctx: ErisContext, includeRepliedTo: boolean): Promise<voi
     await ctx.reply(
       "Please send me a PNG 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;
   }
@@ -46,8 +49,11 @@ 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() {

deno.json

@@ -5,7 +5,9 @@
     "start": "deno run --unstable --allow-env --allow-read --allow-write --allow-net main.ts"
   },
   "compilerOptions": {
-    "jsx": "react"
+    "exactOptionalPropertyTypes": true,
+    "jsx": "react",
+    "noUncheckedIndexedAccess": true
   },
   "fmt": {
     "lineWidth": 100

ui/AppHeader.tsx

@@ -34,7 +34,8 @@ export function AppHeader(
   );
 
   const bot = useSWR(
-    ['bot',"GET",{}] as const, (args) => fetchApi(...args).then(handleResponse),
+    ["bot", "GET", {}] as const,
+    (args) => fetchApi(...args).then(handleResponse),
   );
 
   const userPhoto = useSWR(

ui/Counter.tsx

@@ -1,7 +1,7 @@
 import { cx } from "@twind/core";
 import React from "react";
 
-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;
+  fractionDigits?: number | undefined;
-  transitionDurationMs?: number;
+  transitionDurationMs?: number | undefined;
-  className?: string;
+  className?: string | undefined;
-  postfix?: string;
+  postfix?: string | undefined;
 }) {
   const { value, digits, fractionDigits = 0, transitionDurationMs, className, postfix } = props;
 

ui/WorkersPage.tsx

@@ -159,7 +159,7 @@ export function WorkersPage(props: { sessionId?: string }) {
   );
 }
 
-function WorkerListItem(props: { worker: WorkerData; sessionId?: string }) {
+function WorkerListItem(props: { worker: WorkerData; sessionId: string | undefined }) {
   const { worker, sessionId } = props;
   const editWorkerModalRef = useRef<HTMLDialogElement>(null);
   const deleteWorkerModalRef = useRef<HTMLDialogElement>(null);

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/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;
+}