feat : comment feature

app/api/comments/[id]/[action]/route.ts

@@ -0,0 +1,41 @@
+import { commentHistory, getCommentViewer, listComments, mutateComment, requireCommentViewer } from "@/lib/comments/repository";
+import { heartSchema, moderationSchema, reactionSchema } from "@/lib/comments/validation";
+import { errorResponse, HttpError, readJson, requireSameOrigin } from "@/lib/security/http";
+import { limitRequest } from "@/lib/security/rate-limit";
+
+type Context = { params: Promise<{ id: string; action: string }> };
+export async function GET(request: Request, context: Context) {
+  try {
+    const { id, action } = await context.params;
+    const viewer = await getCommentViewer();
+    const cursor = new URL(request.url).searchParams.get("cursor");
+    const result = action === "history" ? await commentHistory(id, viewer, cursor)
+      : action === "replies" ? await listComments({ viewer, rootId: id, cursor, target: new URL(request.url).searchParams.get("target") ?? undefined })
+      : null;
+    if (!result) throw new HttpError(404, "not-found");
+    return Response.json(result, { headers: { "Cache-Control": "private, no-store" } });
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function PUT(request: Request, context: Context) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    await limitRequest("comment-mutate", viewer.id, 60);
+    const { id, action } = await context.params;
+    const body = await readJson(request);
+    if (action === "reaction") {
+      const value = reactionSchema.safeParse(body);
+      if (!value.success) throw new HttpError(400, "invalid-reaction");
+      await mutateComment(id, viewer, "reaction", value.data.value);
+    } else if (action === "moderation") {
+      const value = moderationSchema.safeParse(body);
+      if (!value.success) throw new HttpError(400, "invalid-moderation");
+      await mutateComment(id, viewer, "moderation", value.data.hidden);
+    } else if (action === "heart") {
+      const value = heartSchema.safeParse(body);
+      if (!value.success) throw new HttpError(400, "invalid-heart");
+      await mutateComment(id, viewer, "heart", value.data.hearted);
+    } else throw new HttpError(404, "not-found");
+    return Response.json({ ok: true });
+  } catch (cause) { return errorResponse(cause); }
+}

app/api/comments/[id]/route.ts

@@ -0,0 +1,32 @@
+import { authorizeComment, commentId, getCommentViewer, listComments, mutateComment, requireCommentViewer } from "@/lib/comments/repository";
+import { publishComment } from "@/lib/comments/publish";
+import { errorResponse, requireSameOrigin } from "@/lib/security/http";
+import { limitRequest } from "@/lib/security/rate-limit";
+
+type Context = { params: Promise<{ id: string }> };
+export async function GET(_request: Request, context: Context) {
+  try {
+    const viewer = await getCommentViewer();
+    const id = commentId((await context.params).id);
+    const authorized = await authorizeComment(id, viewer);
+    const result = await listComments({ viewer, target: authorized.destination.target, id });
+    return Response.json({ item: result.items[0], viewer }, { headers: { "Cache-Control": "private, no-store" } });
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function PATCH(request: Request, context: Context) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    await limitRequest("comment-publish", viewer.id, 20);
+    return Response.json(await publishComment(request, viewer, { id: commentId((await context.params).id) }));
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function DELETE(request: Request, context: Context) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    await limitRequest("comment-mutate", viewer.id, 60);
+    await mutateComment((await context.params).id, viewer, "delete");
+    return new Response(null, { status: 204 });
+  } catch (cause) { return errorResponse(cause); }
+}

app/api/comments/events/route.test.ts

@@ -0,0 +1,42 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { HttpError } from "@/lib/security/http";
+const mocks = vi.hoisted(() => ({ viewer: vi.fn(), target: vi.fn(), stream: vi.fn(), limit: vi.fn() }));
+vi.mock("@/lib/comments/repository", () => ({
+  getCommentViewer: mocks.viewer, getCommentTarget: mocks.target,
+  requireCommentAdmin: (viewer: { admin: boolean } | null) => { if (!viewer?.admin) throw new HttpError(403, "forbidden"); },
+}));
+vi.mock("@/lib/events/redis-stream", () => ({ createRedisNamedEventResponse: mocks.stream }));
+vi.mock("@/lib/security/rate-limit", () => ({ limitRequest: mocks.limit, trustedClientAddress: () => "127.0.0.1" }));
+import { GET } from "./route";
+
+describe("comment event authorization", () => {
+  beforeEach(() => {
+    vi.clearAllMocks(); mocks.viewer.mockResolvedValue(null); mocks.target.mockResolvedValue({ target: "stygian:123" });
+    mocks.stream.mockResolvedValue(new Response("event: changed\ndata: changed\n\n", { headers: { "Content-Type": "text/event-stream" } }));
+  });
+  it("allows anonymous subscribers for a readable target", async () => {
+    const request = new Request("https://guide.test/api/comments/events?target=stygian:123");
+    expect((await GET(request)).status).toBe(200);
+    expect(mocks.target).toHaveBeenCalledWith("stygian:123", null);
+    expect(mocks.stream).toHaveBeenCalledWith("comments:stygian:123", "changed", request.signal);
+  });
+  it("does not subscribe to an inaccessible guide", async () => {
+    mocks.target.mockRejectedValue(new HttpError(404, "guide-not-found"));
+    expect((await GET(new Request("https://guide.test/api/comments/events?target=guide:private"))).status).toBe(404);
+    expect(mocks.stream).not.toHaveBeenCalled();
+  });
+  it("rejects anonymous admin inbox subscriptions", async () => {
+    expect((await GET(new Request("https://guide.test/api/comments/events?scope=admin"))).status).toBe(403);
+    expect(mocks.stream).not.toHaveBeenCalled();
+  });
+  it("allows verified admin inbox subscriptions", async () => {
+    mocks.viewer.mockResolvedValue({ id: "admin", admin: true });
+    const request = new Request("https://guide.test/api/comments/events?scope=admin");
+    expect((await GET(request)).status).toBe(200);
+    expect(mocks.stream).toHaveBeenCalledWith("comments:admin", "changed", request.signal);
+  });
+  it("requires a target for public subscriptions", async () => {
+    expect((await GET(new Request("https://guide.test/api/comments/events"))).status).toBe(400);
+    expect(mocks.stream).not.toHaveBeenCalled();
+  });
+});

app/api/comments/events/route.ts

@@ -0,0 +1,25 @@
+import { createRedisNamedEventResponse } from "@/lib/events/redis-stream";
+import { getCommentTarget, getCommentViewer, requireCommentAdmin } from "@/lib/comments/repository";
+import { errorResponse, HttpError } from "@/lib/security/http";
+import { limitRequest, trustedClientAddress } from "@/lib/security/rate-limit";
+
+export async function GET(request: Request) {
+  try {
+    await limitRequest("stream-open", trustedClientAddress(request.headers), 60);
+    const query = new URL(request.url).searchParams;
+    const viewer = await getCommentViewer();
+    let topic: string;
+    if (query.get("scope") === "admin") {
+      requireCommentAdmin(viewer);
+      topic = "comments:admin";
+    } else {
+      const target = query.get("target");
+      if (!target) throw new HttpError(400, "target-required");
+      const destination = await getCommentTarget(target, viewer);
+      topic = `comments:${destination.target}`;
+    }
+    // Events contain no comment text, images, or author information.
+    // Every refresh rechecks current guide visibility and viewer permissions.
+    return await createRedisNamedEventResponse(topic, "changed", request.signal);
+  } catch (cause) { return errorResponse(cause); }
+}

app/api/comments/images/[id]/route.ts

@@ -0,0 +1,13 @@
+import { commentImage, getCommentViewer } from "@/lib/comments/repository";
+import { publicMediaUrl } from "@/lib/media/storage";
+import { errorResponse } from "@/lib/security/http";
+
+export async function GET(_request: Request, context: { params: Promise<{ id: string }> }) {
+  try {
+    const image = await commentImage((await context.params).id, await getCommentViewer());
+    // Keep old attachment links working without proxying image bytes through the app.
+    return new Response(null, { status: 307, headers: {
+      Location: publicMediaUrl(image.objectKey), "Cache-Control": "private, no-store",
+    } });
+  } catch (cause) { return errorResponse(cause); }
+}

app/api/comments/push-subscription/route.ts

@@ -0,0 +1,45 @@
+import { and, eq } from "drizzle-orm";
+import * as z from "zod";
+import { getDb } from "@/db";
+import { commentPushSubscriptions } from "@/db/schema";
+import { pushPublicKey, validPushEndpoint } from "@/lib/commission/push";
+import { requireCommentViewer } from "@/lib/comments/repository";
+import { errorResponse, HttpError, readJson, requireSameOrigin } from "@/lib/security/http";
+import { limitRequest } from "@/lib/security/rate-limit";
+
+const subscriptionSchema = z.object({
+  endpoint: z.string().max(2048),
+  keys: z.object({ p256dh: z.string().regex(/^[A-Za-z0-9_-]{50,200}$/), auth: z.string().regex(/^[A-Za-z0-9_-]{10,100}$/) }),
+});
+export async function GET() {
+  try {
+    await requireCommentViewer();
+    const publicKey = pushPublicKey();
+    if (!publicKey) throw new HttpError(503, "push-not-configured");
+    return Response.json({ publicKey }, { headers: { "Cache-Control": "private, no-store" } });
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function POST(request: Request) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    if (!pushPublicKey()) throw new HttpError(503, "push-not-configured");
+    await limitRequest("comment-push-subscription", viewer.id, 60);
+    const parsed = subscriptionSchema.safeParse(await readJson(request, 4096));
+    if (!parsed.success || !validPushEndpoint(parsed.data.endpoint)) throw new HttpError(400, "invalid-push-subscription");
+    const { endpoint, keys } = parsed.data;
+    await getDb().insert(commentPushSubscriptions).values({ endpoint, userId: viewer.id, ...keys })
+      .onConflictDoUpdate({ target: commentPushSubscriptions.endpoint, set: { userId: viewer.id, ...keys } });
+    return new Response(null, { status: 204 });
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function DELETE(request: Request) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    const parsed = z.object({ endpoint: z.string().max(2048) }).safeParse(await readJson(request, 4096));
+    if (!parsed.success) throw new HttpError(400, "invalid-push-subscription");
+    await getDb().delete(commentPushSubscriptions).where(and(eq(commentPushSubscriptions.endpoint, parsed.data.endpoint), eq(commentPushSubscriptions.userId, viewer.id)));
+    return new Response(null, { status: 204 });
+  } catch (cause) { return errorResponse(cause); }
+}

app/api/comments/route.ts

@@ -0,0 +1,27 @@
+import { after } from "next/server";
+import { sendCommentReplyPush } from "@/lib/comments/push";
+import { getCommentViewer, listComments, requireCommentViewer } from "@/lib/comments/repository";
+import { publishComment } from "@/lib/comments/publish";
+import { errorResponse, HttpError, requireSameOrigin } from "@/lib/security/http";
+import { limitRequest } from "@/lib/security/rate-limit";
+
+export async function GET(request: Request) {
+  try {
+    const query = new URL(request.url).searchParams;
+    const target = query.get("target");
+    if (!target) throw new HttpError(400, "target-required");
+    return Response.json(await listComments({ viewer: await getCommentViewer(), target, cursor: query.get("cursor"), sort: query.get("sort") ?? undefined }), { headers: { "Cache-Control": "private, no-store" } });
+  } catch (cause) { return errorResponse(cause); }
+}
+export async function POST(request: Request) {
+  try {
+    requireSameOrigin(request);
+    const viewer = await requireCommentViewer();
+    await limitRequest("comment-publish", viewer.id, 20);
+    const target = new URL(request.url).searchParams.get("target");
+    if (!target) throw new HttpError(400, "target-required");
+    const result = await publishComment(request, viewer, { target });
+    after(async () => { await sendCommentReplyPush(result.id).catch(() => console.error("Comment reply notification failed")); });
+    return Response.json(result, { status: 201 });
+  } catch (cause) { return errorResponse(cause); }
+}