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275import { Router } from "express";
import type { Request, Response, NextFunction } from "express";
import multer from "multer";
import { writeFileSync, readFileSync, existsSync, rmSync } from "node:fs";
import { join } from "node:path";
import { ulid } from "ulid";
import type { IrisConfig } from "../config.ts";
import type { Store, SessionRecord } from "../store/db.ts";
import { Paths } from "../store/paths.ts";
import { runPipeline } from "../pipeline/orchestrator.ts";
import type { AuthedRequest } from "../auth/middleware.ts";
import { sendError } from "./errors.ts";
import { summarizeRun } from "../diagnostics.ts";
import { rasterizePdf, PdfTooLargeError, MAX_PDF_PAGES } from "../util/pdf.ts";
import { outputBasenameFromUploads, convertedHtmlFilename } from "../util/outputNames.ts";
const upload = multer({ storage: multer.memoryStorage(), limits: { fileSize: 50 * 1024 * 1024 } });
// Wrap multer so its errors (e.g. file too large) become clean 400s.
function uploadImages(req: Request, res: Response, next: NextFunction): void {
upload.array("images")(req, res, (err: unknown) => {
if (err) {
sendError(res, 400, "invalid_request", `Upload failed: ${(err as Error).message}`);
return;
}
next();
});
}
const IMAGE_EXT = /\.(png|jpe?g|tiff?|webp)$/i;
const PDF_EXT = /\.pdf$/i;
const MAX_TOTAL_PAGES = MAX_PDF_PAGES; // overall cap across all uploaded files
// One-line axe-core summary for the PR description (from sessions/<id>/lint.json).
function sessionSummary(s: SessionRecord) {
return {
session_id: s.session_id,
status: s.status,
image_count: s.image_count,
created_at: s.created_at,
updated_at: s.updated_at,
};
}
// Owned-by-caller lookup. Returns undefined (caller sends 404) when missing or
// owned by another user, so a token cannot probe others' sessions (§9.1).
function ownedSession(store: Store, id: string, userId: number): SessionRecord | undefined {
const s = store.getSession(id);
if (!s || s.github_user_id !== userId) return undefined;
return s;
}
export function sessionsRouter(cfg: IrisConfig, store: Store): Router {
const r = Router();
const paths = new Paths(cfg);
// GET /v1/sessions — list this user's sessions, newest first.
r.get("/", (req: AuthedRequest, res) => {
const limit = Math.min(parseInt(String(req.query.limit ?? "20"), 10) || 20, 100);
const status = req.query.status ? String(req.query.status) : undefined;
const cursor = req.query.cursor ? String(req.query.cursor) : undefined;
const rows = store.listSessions(req.user!.github_user_id, { limit: limit + 1, status, cursor });
const page = rows.slice(0, limit);
const next = rows.length > limit ? page[page.length - 1].created_at : null;
res.json({ sessions: page.map(sessionSummary), next_cursor: next });
});
// POST /v1/sessions — create a session. Accepts images and/or PDFs; PDFs are
// rasterized to one image per page, expanded in submitted order (§9.2).
r.post("/", uploadImages, async (req: AuthedRequest, res) => {
const files = (req.files as Express.Multer.File[] | undefined) ?? [];
if (files.length === 0) {
sendError(res, 400, "invalid_request", "At least one file part named 'images' is required (image or PDF)");
return;
}
for (const f of files) {
if (!IMAGE_EXT.test(f.originalname) && !PDF_EXT.test(f.originalname)) {
sendError(res, 400, "invalid_request", `Unsupported file type: ${f.originalname} (allowed: PNG, JPEG, TIFF, WebP, PDF)`);
return;
}
}
let maxIter = req.user!.max_review_iterations;
const configPart = (req.body as { config?: string } | undefined)?.config;
if (configPart) {
try {
const parsed = JSON.parse(configPart) as { max_review_iterations?: number };
if (typeof parsed.max_review_iterations === "number") maxIter = parsed.max_review_iterations;
} catch {
sendError(res, 400, "invalid_request", "config part is not valid JSON");
return;
}
}
// Expand uploads into ordered page images (PDF -> one PNG per page).
const pages: { name: string; buffer: Buffer }[] = [];
try {
for (const f of files) {
if (PDF_EXT.test(f.originalname)) {
pages.push(...(await rasterizePdf(f.buffer, f.originalname)));
} else {
pages.push({ name: f.originalname, buffer: f.buffer });
}
}
} catch (e) {
if (e instanceof PdfTooLargeError) {
sendError(res, 400, "invalid_request", e.message);
} else {
sendError(res, 422, "pdf_conversion_failed", `Could not process a PDF: ${(e as Error).message}`);
}
return;
}
if (pages.length === 0) {
sendError(res, 400, "invalid_request", "No pages found in the uploaded files");
return;
}
if (pages.length > MAX_TOTAL_PAGES) {
sendError(res, 400, "invalid_request", `Too many pages (${pages.length}); the maximum is ${MAX_TOTAL_PAGES}.`);
return;
}
const sessionId = `ses_${ulid()}`;
paths.initSession(sessionId);
// Remember the source basename so the output title + download filename
// mirror the upload (e.g. report.pdf -> report_converted.html).
writeFileSync(paths.sessionSourceName(sessionId), outputBasenameFromUploads(files));
// Persist page images with an order prefix so submitted order survives (§9.2).
pages.forEach((p, i) => {
const order = String(i + 1).padStart(4, "0");
writeFileSync(join(paths.sessionInput(sessionId), `${order}__${p.name}`), p.buffer);
});
const record = store.createSession({
session_id: sessionId,
github_user_id: req.user!.github_user_id,
image_count: pages.length,
iterations_max: maxIter,
});
// Kick off the pipeline asynchronously; clients poll GET /v1/sessions/{id}.
void runPipeline({ cfg, store, sessionId, maxReviewIterations: maxIter, githubToken: req.token });
res.status(201).json({
session_id: record.session_id,
status: record.status,
image_count: record.image_count,
created_at: record.created_at,
});
});
// GET /v1/sessions/{id} — status.
r.get("/:id", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
const body: Record<string, unknown> = {
session_id: s.session_id,
status: s.status,
phase: s.phase,
iterations_completed: s.iterations_completed,
iterations_max: s.iterations_max,
image_count: s.image_count,
created_at: s.created_at,
updated_at: s.updated_at,
};
if (s.status === "failed" && s.error) body.error = s.error;
res.json(body);
});
// GET /v1/sessions/{id}/output — the HTML document.
r.get("/:id/output", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
if (s.status !== "ready_for_review" && s.status !== "closed") {
sendError(res, 409, "invalid_state", "Output not available until session is ready_for_review");
return;
}
const outPath = paths.sessionOutput(s.session_id);
if (!existsSync(outPath)) {
sendError(res, 409, "invalid_state", "Output not available");
return;
}
// Title + download filename mirror the uploaded file's name.
const base = existsSync(paths.sessionSourceName(s.session_id))
? readFileSync(paths.sessionSourceName(s.session_id), "utf8").trim() || "document"
: "document";
const html = readFileSync(outPath, "utf8").replace(
/<title>[^<]*<\/title>/,
`<title>${base.replace(/&/g, "&").replace(/</g, "<")}</title>`,
);
res.setHeader("Content-Disposition", `inline; filename="${convertedHtmlFilename(base)}"`);
res.type("text/html").send(html);
});
// GET /v1/sessions/{id}/logs — the run log as ndjson.
r.get("/:id/logs", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
const logPath = paths.sessionLog(s.session_id);
res.type("application/x-ndjson").send(existsSync(logPath) ? readFileSync(logPath, "utf8") : "");
});
// GET /v1/sessions/{id}/diagnostics — machine-readable timing/health summary
// for maintainers (human or AI): phase + per-call durations, the slowest
// calls, and any in-flight call (the likely culprit when a run seems hung).
r.get("/:id/diagnostics", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
const logPath = paths.sessionLog(s.session_id);
const text = existsSync(logPath) ? readFileSync(logPath, "utf8") : "";
res.json(summarizeRun(text, { sessionId: s.session_id, status: s.status, phase: s.phase, now: Date.now() }));
});
// POST /v1/sessions/{id}/feedback — re-run within the same session (§7.12).
r.post("/:id/feedback", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
if (s.status !== "ready_for_review") {
sendError(res, 409, "invalid_state", "Feedback can only be submitted when ready_for_review");
return;
}
const feedback = (req.body as { feedback?: string } | undefined)?.feedback;
if (!feedback || typeof feedback !== "string") {
sendError(res, 400, "invalid_request", "feedback (string) is required");
return;
}
store.updateSession(s.session_id, { status: "running", phase: "extraction" });
void runPipeline({
cfg,
store,
sessionId: s.session_id,
maxReviewIterations: s.iterations_max,
feedback,
githubToken: req.token,
});
res.status(202).json({ session_id: s.session_id, status: "running", phase: "extraction" });
});
// POST /v1/sessions/{id}/close — finalize the session and clean tmp (§9.2).
// Agent contributions are auto-filed as GitHub issues during the run (see
// pipeline/contribute.ts), so close no longer opens PRs.
r.post("/:id/close", (req: AuthedRequest, res) => {
const s = ownedSession(store, req.params.id, req.user!.github_user_id);
if (!s) {
sendError(res, 404, "session_not_found", "No such session");
return;
}
if (s.status !== "ready_for_review") {
sendError(res, 409, "invalid_state", "Session is not ready_for_review");
return;
}
const tmp = paths.tmpDir(s.session_id);
if (existsSync(tmp)) rmSync(tmp, { recursive: true, force: true });
store.updateSession(s.session_id, { status: "closed" });
res.json({ session_id: s.session_id, status: "closed" });
});
return r;
}