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eris/app/generationQueue.ts

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import { promiseState } from "async";
import { Chat, Message, User } from "grammy_types";
import { JobData, Queue, Worker } from "kvmq";
import createOpenApiClient from "openapi_fetch";
import { delay } from "std/async";
import { decode, encode } from "std/encoding/base64";
import { getLogger } from "std/log";
import { ulid } from "ulid";
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import { bot } from "../bot/mod.ts";
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import { SdError } from "../sd/SdError.ts";
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import { PngInfo } from "../sd/parsePngInfo.ts";
import * as SdApi from "../sd/sdApi.ts";
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import { formatOrdinal } from "../utils/formatOrdinal.ts";
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import { formatUserChat } from "../utils/formatUserChat.ts";
import { getConfig, SdInstanceData } from "./config.ts";
import { db, fs } from "./db.ts";
import { SdGenerationInfo } from "./generationStore.ts";
import { uploadQueue } from "./uploadQueue.ts";
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const logger = () => getLogger();
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interface GenerationJob {
task:
| {
type: "txt2img";
params: Partial<PngInfo>;
}
| {
type: "img2img";
params: Partial<PngInfo>;
fileId: string;
};
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from: User;
chat: Chat;
requestMessage: Message;
replyMessage: Message;
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sdInstanceId?: string;
progress?: number;
}
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export const generationQueue = new Queue<GenerationJob>(db, "jobQueue");
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export const activeGenerationWorkers = new Map<string, Worker<GenerationJob>>();
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/**
* Initializes queue workers for each SD instance when they become online.
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*/
export async function processGenerationQueue() {
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while (true) {
const config = await getConfig();
for (const sdInstance of config.sdInstances) {
const activeWorker = activeGenerationWorkers.get(sdInstance.id);
if (activeWorker?.isProcessing) continue;
const workerSdClient = createOpenApiClient<SdApi.paths>({
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baseUrl: sdInstance.api.url,
headers: { "Authorization": sdInstance.api.auth },
});
// check if worker is up
const activeWorkerStatus = await workerSdClient.GET("/sdapi/v1/memory", {
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signal: AbortSignal.timeout(10_000),
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})
.then((response) => {
if (!response.data) {
throw new SdError("Failed to get worker status", response.response, response.error);
}
return response;
})
.catch((error) => {
logger().warning(`Worker ${sdInstance.id} is down: ${error}`);
});
if (!activeWorkerStatus?.data) {
continue;
}
// create worker
const newWorker = generationQueue.createWorker(async ({ state }, updateJob) => {
await processGenerationJob(state, updateJob, sdInstance);
});
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newWorker.addEventListener("error", (e) => {
logger().error(
`Generation failed for ${formatUserChat(e.detail.job.state)}: ${e.detail.error}`,
);
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bot.api.sendMessage(
e.detail.job.state.requestMessage.chat.id,
`Generation failed: ${e.detail.error}\n\n` +
(e.detail.job.retryCount > 0
? `Will retry ${e.detail.job.retryCount} more times.`
: `Aborting.`),
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{
reply_to_message_id: e.detail.job.state.requestMessage.message_id,
allow_sending_without_reply: true,
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},
).catch(() => undefined);
if (e.detail.error instanceof SdError) {
newWorker.stopProcessing();
}
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});
newWorker.processJobs();
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activeGenerationWorkers.set(sdInstance.id, newWorker);
logger().info(`Started worker ${sdInstance.id}`);
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}
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await delay(60_000);
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}
}
/**
* Processes a single job from the queue.
*/
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async function processGenerationJob(
state: GenerationJob,
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updateJob: (job: Partial<JobData<GenerationJob>>) => Promise<void>,
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sdInstance: SdInstanceData,
) {
const startDate = new Date();
const workerSdClient = createOpenApiClient<SdApi.paths>({
baseUrl: sdInstance.api.url,
headers: { "Authorization": sdInstance.api.auth },
});
state.sdInstanceId = sdInstance.id;
logger().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");
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}
// edit the existing status message
await bot.api.editMessageText(
state.replyMessage.chat.id,
state.replyMessage.message_id,
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`Generating your prompt now... 0% using ${sdInstance.name || sdInstance.id}`,
{ maxAttempts: 1 },
);
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// reduce size if worker can't handle the resolution
const config = await getConfig();
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const size = limitSize(
{ ...config.defaultParams, ...state.task.params },
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sdInstance.maxResolution,
);
function limitSize(
{ width, height }: { width?: number; height?: number },
maxResolution: number,
): { width?: number; height?: number } {
if (!width || !height) return {};
const ratio = width / height;
if (width * height > maxResolution) {
return {
width: Math.trunc(Math.sqrt(maxResolution * ratio)),
height: Math.trunc(Math.sqrt(maxResolution / ratio)),
};
}
return { width, height };
}
// start generating the image
const responsePromise = state.task.type === "txt2img"
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? workerSdClient.POST("/sdapi/v1/txt2img", {
body: {
...config.defaultParams,
...state.task.params,
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...size,
negative_prompt: state.task.params.negative_prompt
? state.task.params.negative_prompt
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: config.defaultParams?.negative_prompt,
},
})
: state.task.type === "img2img"
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? workerSdClient.POST("/sdapi/v1/img2img", {
body: {
...config.defaultParams,
...state.task.params,
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...size,
negative_prompt: state.task.params.negative_prompt
? state.task.params.negative_prompt
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: config.defaultParams?.negative_prompt,
init_images: [
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encode(
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await fetch(
`https://api.telegram.org/file/bot${bot.token}/${await bot.api.getFile(
state.task.fileId,
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).then((file) => file.file_path)}`,
).then((resp) => resp.arrayBuffer()),
),
],
},
})
: undefined;
if (!responsePromise) {
throw new Error(`Unknown task type: ${state.task.type}`);
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}
// poll for progress while the generation request is pending
do {
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const progressResponse = await workerSdClient.GET("/sdapi/v1/progress", {
params: {},
signal: AbortSignal.timeout(15000),
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});
if (!progressResponse.data) {
throw new SdError(
"Progress request failed",
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progressResponse.response,
progressResponse.error,
);
}
state.progress = progressResponse.data.progress;
await updateJob({ state: state });
await bot.api.sendChatAction(state.chat.id, "upload_photo", { maxAttempts: 1 })
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.catch(() => undefined);
await bot.api.editMessageText(
state.replyMessage.chat.id,
state.replyMessage.message_id,
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`Generating your prompt now... ${(progressResponse.data.progress * 100).toFixed(0)}% using ${
sdInstance.name || sdInstance.id
}`,
{ maxAttempts: 1 },
).catch(() => undefined);
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await Promise.race([delay(3000), responsePromise]).catch(() => undefined);
} while (await promiseState(responsePromise) === "pending");
// check response
const response = await responsePromise;
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if (!response.data) {
throw new SdError(`${state.task.type} failed`, response.response, response.error);
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}
if (!response.data.images?.length) {
throw new Error("No images returned from SD");
}
// info field is a json serialized string so we need to parse it
const info: SdGenerationInfo = JSON.parse(response.data.info);
// save images to db
const imageKeys: Deno.KvKey[] = [];
for (const imageBase64 of response.data.images) {
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const imageBuffer = decode(imageBase64);
const imageKey = ["images", "upload", ulid()];
await fs.set(imageKey, imageBuffer, { expireIn: 30 * 60 * 1000 });
imageKeys.push(imageKey);
}
// create a new upload job
await uploadQueue.pushJob({
chat: state.chat,
from: state.from,
requestMessage: state.requestMessage,
replyMessage: state.replyMessage,
sdInstanceId: sdInstance.id,
startDate,
endDate: new Date(),
imageKeys,
info,
}, { retryCount: 5, retryDelayMs: 10000 });
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// change status message to uploading images
await bot.api.editMessageText(
state.replyMessage.chat.id,
state.replyMessage.message_id,
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`Uploading your images...`,
{ maxAttempts: 1 },
).catch(() => undefined);
logger().debug(`Generation finished for ${formatUserChat(state)}`);
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}
/**
* Handles queue updates and updates the status message.
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*/
export async function updateGenerationQueue() {
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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;
}
if (!job.state.replyMessage) {
// no status message, nothing to update
continue;
}
index++;
await bot.api.editMessageText(
job.state.replyMessage.chat.id,
job.state.replyMessage.message_id,
`You are ${formatOrdinal(index)} in queue.`,
{ maxAttempts: 1 },
).catch(() => undefined);
}
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await delay(3000);
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}
}