93 lines
2.8 KiB
TypeScript
93 lines
2.8 KiB
TypeScript
/**
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* Stores and serves the users' avatars. The profile page uploads the avatar,
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* and the client's `Avatar` component loads it, with the user's `updatedAt` as
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* a cache-busting version.
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*
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* - `POST /api/avatars/me` — signed in. Replaces the caller's avatar (multipart
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* `file`, at most 5 MB), sends `user_updated` to everyone, and answers the
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* caller's user.
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* - `GET /api/avatars/:userId` — public. Serves a user's avatar; 404 without
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* one.
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*
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* @module
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*/
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import { Router } from "@oak/oak";
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import { authMiddleware } from "../middleware/auth.ts";
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import { getUserById, updateUserAvatar } from "../services/user-service.ts";
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import {
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broadcastUserUpdated,
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updateClientAvatar,
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} from "../services/ws-service.ts";
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import { type APIResponse } from "../../shared/api.ts";
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import { APIException } from "../lib/api-exception.ts";
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import type { SelfUser } from "../../shared/user.ts";
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import { toPublicUser, toSelfUser } from "../model/user.ts";
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import {
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replaceUploadedFile,
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serveUploadedFile,
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validateImageUpload,
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} from "../lib/upload.ts";
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import { AVATARS_DIR } from "../config.ts";
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/**
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* Mounted by `api/main.ts` behind the error, Open Graph and CORS middleware.
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* An `APIException` thrown by a handler becomes the JSON error response there.
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*/
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const router: Router = new Router();
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router.post("/api/avatars/me", authMiddleware, async (ctx) => {
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const authPayload = ctx.state.user;
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const contentType = ctx.request.headers.get("content-type") ?? "";
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if (!contentType.includes("multipart/form-data")) {
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throw new APIException(400, "Expected multipart/form-data");
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}
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const body = await ctx.request.body.formData();
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const file = body.get("file");
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if (!(file instanceof File)) {
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throw new APIException(400, "Missing file field");
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}
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const data = new Uint8Array(await file.arrayBuffer());
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const mime = validateImageUpload(data);
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// Written before the record announces it, or clients would fetch it too
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// early.
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await replaceUploadedFile(`${AVATARS_DIR}/${authPayload.userId}`, data);
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updateUserAvatar(authPayload.userId, mime);
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updateClientAvatar(authPayload.userId, mime);
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const user = getUserById(authPayload.userId);
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// Presence alone would update only the online list; `user_updated` reaches
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// every avatar on screen, and its bumped `updatedAt` busts their cache.
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broadcastUserUpdated(toPublicUser(user));
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const responseBody: APIResponse<SelfUser> = {
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success: true,
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data: toSelfUser(user),
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};
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ctx.response.body = responseBody;
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});
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router.get("/api/avatars/:userId", async (ctx) => {
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const { userId } = ctx.params;
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let user;
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try {
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user = getUserById(userId);
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} catch {
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ctx.response.status = 404;
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return;
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}
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if (!user.avatarMime) {
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ctx.response.status = 404;
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return;
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}
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await serveUploadedFile(ctx, `${AVATARS_DIR}/${userId}`, user.avatarMime);
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});
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export default router;
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