mirror of
https://github.com/ReCloudStudio/WebHooker.git
synced 2026-09-22 16:11:29 +00:00
RhenCloud
c75cc058fc
Replace the App-identity !gh text command with native slash and message context-menu commands. /gh login|logout link a Discord user to their GitHub account; /gh comment add|edit|del and the right-click 'GitHub' commands open a modal and create/edit/delete comments using the user's own OAuth token, delegating permission checks to GitHub (surfacing 401/403/404). The gateway registers guild commands on connect and handles interactions in the DO.
633 lines
21 KiB
TypeScript
633 lines
21 KiB
TypeScript
import { log } from "./log";
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import { sendMessage } from "./discord-rest";
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import {
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getOAuthURL,
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commentAsUser,
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getCommentAsUser,
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editCommentAsUser,
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deleteCommentAsUser,
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} from "./github-oauth";
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import { getDiscordLink, removeDiscordLink } from "./token-store";
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import type { Env } from "./types";
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interface SendMessageBody {
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channelId: string;
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message: unknown;
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threadId?: string;
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}
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const DISCORD_API = "https://discord.com/api/v10";
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const GATEWAY_URL = "https://gateway.discord.gg/?v=10&encoding=json";
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const BASE_RECONNECT_DELAY = 1000;
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const MAX_RECONNECT_DELAY = 60_000;
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const ALARM_INTERVAL = 30;
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// Discord interaction protocol constants
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const INTERACTION_TYPE = { COMMAND: 2, MODAL_SUBMIT: 5 } as const;
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const CALLBACK_TYPE = { MESSAGE: 4, MODAL: 9 } as const;
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const COMMAND_TYPE = { CHAT_INPUT: 1, MESSAGE: 3 } as const;
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const OPTION_TYPE = { SUB_COMMAND: 1, SUB_COMMAND_GROUP: 2, STRING: 3 } as const;
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const EPHEMERAL = 64;
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// Right-click (message context-menu) command names → operation.
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const MSG_CMD_ADD = "GitHub: 添加评论";
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const MSG_CMD_EDIT = "GitHub: 编辑评论";
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const MSG_CMD_DEL = "GitHub: 删除评论";
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// Modal custom_id encodings (delimiter '|' never appears in owner/repo).
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const MODAL_ADD = "ghc|add|"; // ghc|add|owner|repo|issueNumber
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const MODAL_EDIT = "ghc|edit|"; // ghc|edit|owner|repo|commentId
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const APP_COMMANDS = [
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{
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name: "gh",
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type: COMMAND_TYPE.CHAT_INPUT,
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description: "GitHub 集成",
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options: [
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{ type: OPTION_TYPE.SUB_COMMAND, name: "login", description: "绑定你的 GitHub 账号以用本人身份评论" },
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{ type: OPTION_TYPE.SUB_COMMAND, name: "logout", description: "解绑你的 GitHub 账号" },
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{
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type: OPTION_TYPE.SUB_COMMAND_GROUP,
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name: "comment",
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description: "对 issue/PR 评论进行增删改",
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options: [
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{
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type: OPTION_TYPE.SUB_COMMAND,
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name: "add",
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description: "在 issue/PR 下新增评论",
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options: [
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{ type: OPTION_TYPE.STRING, name: "link", description: "issue/PR 链接", required: true },
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],
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},
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{
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type: OPTION_TYPE.SUB_COMMAND,
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name: "edit",
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description: "编辑一条评论",
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options: [
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{ type: OPTION_TYPE.STRING, name: "link", description: "评论链接（含 #issuecomment-）", required: true },
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],
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},
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{
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type: OPTION_TYPE.SUB_COMMAND,
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name: "del",
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description: "删除一条评论",
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options: [
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{ type: OPTION_TYPE.STRING, name: "link", description: "评论链接（含 #issuecomment-）", required: true },
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],
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},
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],
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},
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],
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},
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{ name: MSG_CMD_ADD, type: COMMAND_TYPE.MESSAGE },
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{ name: MSG_CMD_EDIT, type: COMMAND_TYPE.MESSAGE },
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{ name: MSG_CMD_DEL, type: COMMAND_TYPE.MESSAGE },
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];
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// Comment link (has the comment id); check this BEFORE the plain issue regex.
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const GITHUB_COMMENT_RE =
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/github\.com\/([^/\s]+)\/([^/\s]+)\/(?:issues|pull)\/\d+#issuecomment-(\d+)/;
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const GITHUB_ISSUE_RE = /github\.com\/([^/\s]+)\/([^/\s]+)\/(?:issues|pull)\/(\d+)/;
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export class DiscordGateway {
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private state: DurableObjectState;
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private env: Env;
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private socket: WebSocket | null = null;
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private heartbeatTimer: ReturnType<typeof setTimeout> | null = null;
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private heartbeatInterval: number | null = null;
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private lastSequence: number | null = null;
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private sessionId: string | null = null;
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private token: string | null = null;
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private connecting = false;
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private reconnectAttempt = 0;
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private applicationId: string | null = null;
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private registeredGuilds = new Set<string>();
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constructor(state: DurableObjectState, env: Env) {
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this.state = state;
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this.env = env;
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}
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async fetch(request: Request): Promise<Response> {
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const body = (await request.json()) as {
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action: string;
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token?: string;
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} & Record<string, unknown>;
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switch (body.action) {
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case "start": {
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this.token = body.token as string;
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await this.state.storage.put("token", this.token);
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if (this.connecting || this.socket) {
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return new Response(JSON.stringify({ ok: true, status: "already_connected" }));
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}
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await this.connect();
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await this.state.storage.setAlarm(Date.now() + ALARM_INTERVAL * 1000);
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return new Response(JSON.stringify({ ok: true }));
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}
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case "send": {
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const { channelId, message, threadId } = body as unknown as SendMessageBody;
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const result = await this.postMessage(channelId, message, threadId);
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return new Response(JSON.stringify(result));
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}
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case "status": {
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return new Response(
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JSON.stringify({
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connected: this.socket?.readyState === WebSocket.OPEN,
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sessionId: this.sessionId,
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}),
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);
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}
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default:
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return new Response(JSON.stringify({ error: "Unknown action" }), { status: 400 });
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}
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}
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private async connect(): Promise<void> {
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if (!this.token) return;
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if (this.connecting || this.socket) return;
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this.connecting = true;
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log.info("Connecting to Discord Gateway");
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try {
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const resp = await fetch(GATEWAY_URL, {
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headers: { Upgrade: "websocket" },
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});
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const ws = resp.webSocket;
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if (!ws) {
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this.connecting = false;
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log.error({ status: resp.status }, "Gateway did not return a WebSocket");
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this.scheduleReconnect();
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return;
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}
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ws.accept();
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this.socket = ws;
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this.connecting = false;
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ws.addEventListener("message", (event) => {
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this.handleMessage(event.data as string);
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});
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ws.addEventListener("close", (event) => {
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this.socket = null;
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this.clearHeartbeat();
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log.warn(
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{ code: (event as CloseEvent).code, reason: (event as CloseEvent).reason },
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"Gateway disconnected, scheduling reconnect via alarm",
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);
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this.scheduleReconnect();
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});
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ws.addEventListener("error", (event) => {
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log.error({ err: String((event as ErrorEvent).message ?? event) }, "Gateway WebSocket error");
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});
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} catch (err) {
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this.connecting = false;
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log.error({ err: String(err) }, "Failed to connect to Gateway");
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this.scheduleReconnect();
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}
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}
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private scheduleReconnect(): void {
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const delay = Math.min(
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BASE_RECONNECT_DELAY * 2 ** this.reconnectAttempt,
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MAX_RECONNECT_DELAY,
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);
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this.reconnectAttempt++;
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this.state.storage.setAlarm(Date.now() + delay);
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}
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private handleMessage(data: string): void {
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const msg = JSON.parse(data) as {
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op: number;
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d: unknown;
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s: number | null;
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t: string | null;
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};
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if (msg.s !== null) this.lastSequence = msg.s;
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switch (msg.op) {
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case 0:
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this.reconnectAttempt = 0;
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this.handleDispatch(msg.t!, msg.d);
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break;
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case 1:
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// Heartbeat request from Discord — respond immediately
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this.sendHeartbeat();
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break;
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case 10:
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this.handleHello(msg.d as { heartbeat_interval: number });
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break;
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case 11:
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break;
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case 7:
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log.warn("Gateway requested reconnect (op 7)");
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this.reconnect();
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break;
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case 9:
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log.warn({ resumable: msg.d }, "Gateway Invalid Session (op 9)");
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this.lastSequence = null;
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this.sessionId = null;
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// Discord asks to wait 1-5s before a fresh identify
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setTimeout(() => this.identify(), 2000 + Math.floor(Math.random() * 3000));
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break;
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}
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}
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private handleHello(d: { heartbeat_interval: number }): void {
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log.info({ heartbeatInterval: d.heartbeat_interval }, "Gateway HELLO received");
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this.heartbeatInterval = d.heartbeat_interval;
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this.heartbeat();
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this.identify();
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}
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private heartbeat(): void {
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this.clearHeartbeat();
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this.sendHeartbeat();
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if (this.heartbeatInterval) {
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this.heartbeatTimer = setTimeout(() => this.heartbeat(), this.heartbeatInterval);
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}
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}
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private sendHeartbeat(): void {
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if (!this.socket || this.socket.readyState !== WebSocket.OPEN) return;
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this.socket.send(JSON.stringify({ op: 1, d: this.lastSequence }));
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}
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private clearHeartbeat(): void {
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if (this.heartbeatTimer) {
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clearTimeout(this.heartbeatTimer);
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this.heartbeatTimer = null;
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}
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}
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private identify(): void {
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if (!this.socket || this.socket.readyState !== WebSocket.OPEN || !this.token) {
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log.warn({ hasSocket: !!this.socket, readyState: this.socket?.readyState ?? null }, "Cannot identify");
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return;
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}
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log.info("Sending IDENTIFY");
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this.socket.send(
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JSON.stringify({
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op: 2,
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d: {
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token: this.token,
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// GUILDS only — interactions are delivered regardless of intents,
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// and GUILDS lets us receive GUILD_CREATE to register slash commands.
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intents: 1 << 0,
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properties: {
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os: "linux",
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browser: "webhooker",
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device: "webhooker",
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},
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},
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}),
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);
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}
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private handleDispatch(event: string, data: unknown): void {
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const d = data as Record<string, unknown>;
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switch (event) {
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case "READY":
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this.sessionId = d.session_id as string;
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this.applicationId = (d.application as { id?: string })?.id ?? this.applicationId;
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log.info(
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{ user: (d.user as { username?: string })?.username, appId: this.applicationId },
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"Gateway READY",
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);
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break;
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case "GUILD_CREATE": {
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const guildId = d.id as string | undefined;
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if (guildId) {
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this.registerGuildCommands(guildId).catch((err) =>
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log.error({ err: String(err), guildId }, "Failed to register guild commands"),
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);
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}
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break;
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}
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case "INTERACTION_CREATE":
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this.handleInteraction(d).catch((err) =>
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log.error({ err: String(err) }, "Interaction handler failed"),
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);
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break;
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}
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}
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private botToken(): string {
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return this.token ?? this.env.DISCORD_TOKEN ?? "";
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}
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/** Register the slash + message commands for a guild (instant availability). */
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private async registerGuildCommands(guildId: string): Promise<void> {
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if (!this.applicationId || this.registeredGuilds.has(guildId)) return;
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const res = await fetch(
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`${DISCORD_API}/applications/${this.applicationId}/guilds/${guildId}/commands`,
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{
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method: "PUT",
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headers: {
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Authorization: `Bot ${this.botToken()}`,
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"Content-Type": "application/json",
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},
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body: JSON.stringify(APP_COMMANDS),
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},
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);
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if (res.ok) {
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this.registeredGuilds.add(guildId);
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log.info({ guildId }, "Registered guild application commands");
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} else {
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const err = await res.text();
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log.warn({ guildId, status: res.status, err }, "Command registration failed");
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}
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}
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private async handleInteraction(d: Record<string, unknown>): Promise<void> {
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const interaction = d as {
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id: string;
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token: string;
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type: number;
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guild_id?: string;
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member?: { user?: { id?: string } };
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user?: { id?: string };
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data?: Record<string, unknown>;
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};
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const userId = interaction.member?.user?.id ?? interaction.user?.id ?? null;
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const id = interaction.id;
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const token = interaction.token;
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if (interaction.type === INTERACTION_TYPE.COMMAND) {
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const data = interaction.data as {
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name?: string;
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type?: number;
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target_id?: string;
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options?: Array<{ name: string; options?: Array<{ name: string; value?: string; options?: Array<{ name: string; value?: string }> }> }>;
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resolved?: { messages?: Record<string, { embeds?: Array<{ url?: string }>; content?: string }> };
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};
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// Right-click (message context-menu) commands.
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if (data.type === COMMAND_TYPE.MESSAGE) {
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const op =
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data.name === MSG_CMD_ADD ? "add" : data.name === MSG_CMD_EDIT ? "edit" : data.name === MSG_CMD_DEL ? "del" : null;
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if (!op) return;
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const target = data.target_id ? data.resolved?.messages?.[data.target_id] : undefined;
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const source = target?.embeds?.[0]?.url ?? target?.content ?? "";
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return this.commentOp(id, token, userId, op, source);
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}
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// Slash command /gh ...
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if (data.name === "gh" && data.type === COMMAND_TYPE.CHAT_INPUT) {
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const top = data.options?.[0];
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if (top?.name === "login") return this.cmdLogin(id, token, userId);
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if (top?.name === "logout") return this.cmdLogout(id, token, userId);
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if (top?.name === "comment") {
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const sub = top.options?.[0];
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const op = sub?.name === "add" ? "add" : sub?.name === "edit" ? "edit" : sub?.name === "del" ? "del" : null;
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if (!op) return;
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const link = sub?.options?.find((o) => o.name === "link")?.value ?? "";
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return this.commentOp(id, token, userId, op, link);
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}
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return;
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}
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return;
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}
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if (interaction.type === INTERACTION_TYPE.MODAL_SUBMIT) {
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return this.modalSubmit(id, token, userId, interaction.data);
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}
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}
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/** Respond to an interaction with an ephemeral text message. */
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private async respond(id: string, token: string, content: string): Promise<void> {
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await this.interactionCallback(id, token, {
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type: CALLBACK_TYPE.MESSAGE,
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data: { content, flags: EPHEMERAL },
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});
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}
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private async interactionCallback(id: string, token: string, body: unknown): Promise<void> {
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const res = await fetch(`${DISCORD_API}/interactions/${id}/${token}/callback`, {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify(body),
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});
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if (!res.ok) {
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const err = await res.text();
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log.warn({ status: res.status, err }, "Interaction callback failed");
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}
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}
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private async cmdLogin(id: string, token: string, userId: string | null): Promise<void> {
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if (!userId) return this.respond(id, token, "无法识别你的 Discord 账号。");
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const clientId = this.env.GITHUB_CLIENT_ID;
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if (!clientId) return this.respond(id, token, "服务器未配置 GitHub OAuth（GITHUB_CLIENT_ID）。");
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const state = crypto.randomUUID().replace(/-/g, "");
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await this.env.KV.put(
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`state:${state}`,
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JSON.stringify({ redirectTo: "/", discordUserId: userId, expiresAt: Date.now() + 600_000 }),
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{ expirationTtl: 600 },
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);
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const url = getOAuthURL(clientId, state);
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await this.respond(
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id,
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token,
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`点击链接授权 GitHub，即可用**本人身份**评论（仅你可见，10 分钟内有效）：\n${url}`,
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);
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}
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private async cmdLogout(id: string, token: string, userId: string | null): Promise<void> {
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if (!userId) return this.respond(id, token, "无法识别你的 Discord 账号。");
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await removeDiscordLink(this.env.KV, userId);
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await this.respond(id, token, "已解绑你的 GitHub 账号。");
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}
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/** Map a GitHub op error code to a user-facing (Chinese) message. */
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private errText(err: unknown): string {
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const t = err instanceof Error ? err.message : String(err);
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if (t === "GITHUB_TOKEN_EXPIRED") return "GitHub 授权已过期或无效，请重新使用 `/gh login` 绑定。";
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if (t === "GITHUB_FORBIDDEN") return "GitHub 拒绝了此操作：你的账号没有权限修改/删除这条评论。";
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if (t === "GITHUB_NOT_FOUND") return "找不到目标（可能评论已被删除或仓库不可访问）。";
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return `操作失败：${t}`;
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}
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/**
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* Unified entry for add/edit/del, from either a slash command (source = link
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* option) or a right-click message command (source = notification embed url).
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*/
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private async commentOp(
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id: string,
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token: string,
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userId: string | null,
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op: "add" | "edit" | "del",
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source: string,
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): Promise<void> {
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if (!userId) return this.respond(id, token, "无法识别你的 Discord 账号。");
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const githubUserId = await getDiscordLink(this.env.KV, userId);
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if (!githubUserId) {
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return this.respond(id, token, "你还没有绑定 GitHub 账号，请先使用 `/gh login`。");
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}
|
||
|
||
if (op === "add") {
|
||
const m = source.match(GITHUB_ISSUE_RE);
|
||
if (!m) return this.respond(id, token, "找不到 issue / PR 链接（右键 issue/PR 通知，或用 link 传入链接）。");
|
||
return this.openCommentModal(id, token, `${MODAL_ADD}${m[1]}|${m[2]}|${m[3]}`, `评论 ${m[1]}/${m[2]}#${m[3]}`);
|
||
}
|
||
|
||
// edit / del both need a specific comment id.
|
||
const m = source.match(GITHUB_COMMENT_RE);
|
||
if (!m) {
|
||
return this.respond(id, token, "找不到评论链接（需含 `#issuecomment-...`，请右键某条评论通知，或粘贴评论链接）。");
|
||
}
|
||
const [, owner, repo, commentId] = m;
|
||
|
||
if (op === "del") {
|
||
try {
|
||
await deleteCommentAsUser(this.env.KV, githubUserId, owner!, repo!, Number(commentId));
|
||
return this.respond(id, token, `已删除评论 ${owner}/${repo}#issuecomment-${commentId}。`);
|
||
} catch (err) {
|
||
return this.respond(id, token, this.errText(err));
|
||
}
|
||
}
|
||
|
||
// edit: fetch current body to prefill the modal.
|
||
let prefill = "";
|
||
try {
|
||
const { body } = await getCommentAsUser(this.env.KV, githubUserId, owner!, repo!, Number(commentId));
|
||
prefill = body;
|
||
} catch (err) {
|
||
return this.respond(id, token, this.errText(err));
|
||
}
|
||
return this.openCommentModal(
|
||
id,
|
||
token,
|
||
`${MODAL_EDIT}${owner}|${repo}|${commentId}`,
|
||
`编辑评论 #${commentId}`,
|
||
prefill,
|
||
);
|
||
}
|
||
|
||
/** Open a modal to collect/edit comment body. */
|
||
private async openCommentModal(
|
||
id: string,
|
||
token: string,
|
||
customId: string,
|
||
title: string,
|
||
prefill = "",
|
||
): Promise<void> {
|
||
await this.interactionCallback(id, token, {
|
||
type: CALLBACK_TYPE.MODAL,
|
||
data: {
|
||
custom_id: customId,
|
||
title: title.slice(0, 45),
|
||
components: [
|
||
{
|
||
type: 1,
|
||
components: [
|
||
{
|
||
type: 4,
|
||
custom_id: "body",
|
||
label: "评论内容",
|
||
style: 2,
|
||
required: true,
|
||
max_length: 2000,
|
||
value: prefill.slice(0, 2000) || undefined,
|
||
},
|
||
],
|
||
},
|
||
],
|
||
},
|
||
});
|
||
}
|
||
|
||
private async modalSubmit(
|
||
id: string,
|
||
token: string,
|
||
userId: string | null,
|
||
data: unknown,
|
||
): Promise<void> {
|
||
const d = data as {
|
||
custom_id?: string;
|
||
components?: Array<{ components?: Array<{ custom_id?: string; value?: string }> }>;
|
||
};
|
||
const customId = d.custom_id;
|
||
if (!userId || !customId) return;
|
||
|
||
const body = d.components?.[0]?.components?.find((c) => c.custom_id === "body")?.value?.trim();
|
||
if (!body) return this.respond(id, token, "评论内容不能为空。");
|
||
|
||
const githubUserId = await getDiscordLink(this.env.KV, userId);
|
||
if (!githubUserId) {
|
||
return this.respond(id, token, "你还没有绑定 GitHub 账号，请先使用 `/gh login`。");
|
||
}
|
||
|
||
// ghc|add|owner|repo|issueNumber
|
||
if (customId.startsWith(MODAL_ADD)) {
|
||
const [owner, repo, number] = customId.slice(MODAL_ADD.length).split("|");
|
||
if (!owner || !repo || !number) return this.respond(id, token, "内部错误：无法解析目标 issue。");
|
||
try {
|
||
const { htmlUrl, login } = await commentAsUser(
|
||
this.env.KV,
|
||
githubUserId,
|
||
owner,
|
||
repo,
|
||
Number(number),
|
||
body,
|
||
);
|
||
return this.respond(id, token, `已以 **@${login}** 身份评论：${htmlUrl}`);
|
||
} catch (err) {
|
||
return this.respond(id, token, this.errText(err));
|
||
}
|
||
}
|
||
|
||
// ghc|edit|owner|repo|commentId
|
||
if (customId.startsWith(MODAL_EDIT)) {
|
||
const [owner, repo, commentId] = customId.slice(MODAL_EDIT.length).split("|");
|
||
if (!owner || !repo || !commentId) return this.respond(id, token, "内部错误：无法解析目标评论。");
|
||
try {
|
||
const { htmlUrl } = await editCommentAsUser(
|
||
this.env.KV,
|
||
githubUserId,
|
||
owner,
|
||
repo,
|
||
Number(commentId),
|
||
body,
|
||
);
|
||
return this.respond(id, token, `已更新评论：${htmlUrl}`);
|
||
} catch (err) {
|
||
return this.respond(id, token, this.errText(err));
|
||
}
|
||
}
|
||
}
|
||
|
||
private reconnect(): void {
|
||
this.clearHeartbeat();
|
||
if (this.socket) {
|
||
this.socket.close();
|
||
this.socket = null;
|
||
}
|
||
this.connecting = false;
|
||
this.scheduleReconnect();
|
||
}
|
||
|
||
private async postMessage(
|
||
channelId: string,
|
||
message: unknown,
|
||
threadId?: string,
|
||
): Promise<{ ok: boolean; error?: string }> {
|
||
const token = this.token ?? this.env.DISCORD_TOKEN;
|
||
if (!token) return { ok: false, error: "Discord token is not configured" };
|
||
return sendMessage(token, channelId, message, threadId);
|
||
}
|
||
|
||
async alarm(): Promise<void> {
|
||
if (!this.token) {
|
||
this.token = (await this.state.storage.get<string>("token")) ?? this.env.DISCORD_TOKEN ?? "";
|
||
}
|
||
if (!this.socket || this.socket.readyState !== WebSocket.OPEN) {
|
||
log.info("Alarm: restarting Gateway connection");
|
||
await this.connect();
|
||
}
|
||
await this.state.storage.setAlarm(Date.now() + ALARM_INTERVAL * 1000);
|
||
}
|
||
}
|