📦 EqualifyEverything / equalify-iris

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335import { Router } from "express";
import multer from "multer";
import { writeFileSync, readFileSync, existsSync, rmSync, appendFileSync } from "node:fs";
import { join } from "node:path";
import { ulid } from "ulid";
import { Octokit } from "@octokit/rest";
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 { gatherNewAgents, gatherAgentUpdates } from "../github/contributions.ts";
import { ensureFork, openPr, parseRepo, type PrFile } from "../github/pr.ts";
import { summarizeRun } from "../diagnostics.ts";

const upload = multer({ storage: multer.memoryStorage() });

const ALLOWED_EXT = /\.(png|jpe?g|tiff?|webp)$/i;
const PR_BODY_OUTPUT_CAP = 50000; // GitHub PR bodies cap at ~65k chars

// One-line axe-core summary for the PR description (from sessions/<id>/lint.json).
function summarizeLint(lintPath: string): string {
  if (!existsSync(lintPath)) return "(no report)";
  try {
    const lint = JSON.parse(readFileSync(lintPath, "utf8")) as { ok?: boolean; violations?: unknown[]; error?: string };
    const n = lint.violations?.length ?? 0;
    if (lint.error) return `could not run (${lint.error})`;
    return lint.ok ? `passed — 0 violations` : `${n} violation${n === 1 ? "" : "s"}`;
  } catch {
    return "(unreadable report)";
  }
}

// A collapsible <details> block embedding text in a fenced code block, capped.
function prDetails(summary: string, text: string): string {
  const capped =
    text.length > PR_BODY_OUTPUT_CAP ? text.slice(0, PR_BODY_OUTPUT_CAP) + "\n… (truncated)" : text;
  return `<details><summary>${summary}</summary>\n\n\`\`\`html\n${capped}\n\`\`\`\n\n</details>`;
}

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, store images in submitted order.
  r.post("/", upload.array("images"), (req: AuthedRequest, res) => {
    const files = (req.files as Express.Multer.File[] | undefined) ?? [];
    if (files.length === 0) {
      sendError(res, 400, "invalid_request", "At least one image part named 'images' is required");
      return;
    }
    for (const f of files) {
      if (!ALLOWED_EXT.test(f.originalname)) {
        sendError(res, 400, "invalid_request", `Unsupported image type: ${f.originalname}`);
        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;
      }
    }

    const sessionId = `ses_${ulid()}`;
    paths.initSession(sessionId);
    // Persist images with an order prefix so submitted order survives (§9.2).
    files.forEach((f, i) => {
      const order = String(i + 1).padStart(4, "0");
      writeFileSync(join(paths.sessionInput(sessionId), `${order}__${f.originalname}`), f.buffer);
    });

    const record = store.createSession({
      session_id: sessionId,
      github_user_id: req.user!.github_user_id,
      image_count: files.length,
      iterations_max: maxIter,
    });

    // Kick off the pipeline asynchronously; clients poll GET /v1/sessions/{id}.
    void runPipeline({ cfg, store, sessionId, maxReviewIterations: maxIter });

    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, plus pending_prs preview when ready.
  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;
    if (s.status === "ready_for_review") {
      const newAgents = gatherNewAgents(paths, s.session_id);
      const updates = gatherAgentUpdates(paths, s.session_id);
      body.pending_prs = {
        new_agents: newAgents.map((a) => ({
          agent_name: a.agent_name,
          summary: a.summary,
          triggered_by: a.triggered_by,
        })),
        agent_updates: updates.map((u) => ({
          agent_name: u.agent_name,
          summary: u.summary,
          diff_preview: u.diff_preview,
        })),
      };
    }
    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;
    }
    res.type("text/html").send(readFileSync(outPath, "utf8"));
  });

  // 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: "triage" });
    void runPipeline({
      cfg,
      store,
      sessionId: s.session_id,
      maxReviewIterations: s.iterations_max,
      feedback,
    });
    res.status(202).json({ session_id: s.session_id, status: "running", phase: "triage" });
  });

  // POST /v1/sessions/{id}/close — finalize, open PRs, clean tmp (§7.13, §9.2).
  r.post("/:id/close", async (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 skipPrs = String(req.query.skip_prs ?? "") === "true";
    const prsOpened: { kind: string; agent_name: string; pr_url: string; branch: string }[] = [];

    if (!skipPrs) {
      const newAgents = gatherNewAgents(paths, s.session_id);
      const updates = gatherAgentUpdates(paths, s.session_id);
      if (newAgents.length || updates.length) {
        try {
          const octokit = new Octokit({ auth: req.token, baseUrl: cfg.github.api_base_url });
          const upstream = parseRepo(cfg.github.upstream_repo);
          const forkUrl = await ensureFork(octokit, upstream);
          store.setFork(s.github_user_id, forkUrl);
          const forkOwner = (await octokit.users.getAuthenticated()).data.login;

          // Lean PR: only the agent file is committed (the agent library stays
          // code-only). The produced output and the axe-core lint result go in
          // the PR description for the reviewer, not as committed fixtures.
          const outputHtml = existsSync(paths.sessionOutput(s.session_id))
            ? readFileSync(paths.sessionOutput(s.session_id), "utf8")
            : "";
          const lintLine = summarizeLint(paths.sessionLint(s.session_id));

          for (const a of newAgents) {
            try {
              const files: PrFile[] = [{ path: `agents/${a.file}`, content: a.content }];
              const opened = await openPr(octokit, {
                upstream,
                forkOwner,
                branchPrefix: "new-agent",
                nameForBranch: a.agent_name,
                files,
                title: `Add ${a.agent_name} content agent`,
                body:
                  `Session-built agent contributed from an Equalify Iris session.\n\n` +
                  `**Content type**: ${a.agent_name}\n` +
                  `**Why existing agents didn't cover it**: ${a.summary}\n` +
                  `**Triggered by**: ${a.triggered_by || "(unknown)"}\n` +
                  `**Accessibility lint**: ${lintLine}\n\n` +
                  prDetails("Sample output produced by this agent", outputHtml) +
                  `\n\n_Opened automatically on session close (PRD §7.13)._`,
              });
              prsOpened.push({ kind: "new_agent", agent_name: a.agent_name, ...opened });
            } catch (e) {
              appendFileSync(paths.sessionPrs(s.session_id), `- FAILED new_agent ${a.agent_name}: ${(e as Error).message}\n`);
            }
          }

          for (const u of updates) {
            try {
              const opened = await openPr(octokit, {
                upstream,
                forkOwner,
                branchPrefix: "agent-update",
                nameForBranch: u.agent_name.replace(/\.md$/, ""),
                files: [
                  { path: `agents/${u.agent_name.endsWith(".md") ? u.agent_name : u.agent_name + ".md"}`, content: u.content },
                ],
                title: `Update ${u.agent_name}`,
                body: `Proposed update from an Equalify Iris session.\n\n${u.summary}\n\n\`\`\`diff\n${u.diff_preview}\n\`\`\``,
              });
              prsOpened.push({ kind: "agent_update", agent_name: u.agent_name, ...opened });
            } catch (e) {
              appendFileSync(paths.sessionPrs(s.session_id), `- FAILED agent_update ${u.agent_name}: ${(e as Error).message}\n`);
            }
          }
        } catch (e) {
          sendError(res, 502, "pr_failed", `Failed to open PRs: ${(e as Error).message}`);
          return;
        }
      }
    }

    // Record opened PRs, then delete tmp/<session-id> entirely (§8.2).
    if (prsOpened.length) {
      appendFileSync(
        paths.sessionPrs(s.session_id),
        prsOpened.map((p) => `- [${p.kind}] ${p.agent_name}: ${p.pr_url} (${p.branch})`).join("\n") + "\n",
      );
    }
    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", prs_opened: prsOpened });
  });

  return r;
}