anonymous_github/scripts/dev-mock.js

/**
 * Mock server for local UI work on authenticated pages (dashboard, etc.).
 *
 * Serves the local `public/` folder exactly like scripts/dev-proxy.js, but
 * instead of proxying the API to the live site it answers the user-facing
 * endpoints with fixture data. No database, no GitHub login required.
 *
 *   node scripts/dev-mock.js          # default port 4002
 *   PORT=5000 node scripts/dev-mock.js
 *
 * The fixtures deliberately include awkward records (expired, error,
 * stuck download, legacy record without an id, conference tag, unlimited
 * quota) so the dashboard's edge cases can be checked visually.
 */

const path = require("path");
const fs = require("fs");
const express = require("express");

const PORT = parseInt(process.env.PORT || "4002", 10);
const PUBLIC_DIR = path.resolve(__dirname, "..", "public");
const manifestPath = path.join(PUBLIC_DIR, "asset-manifest.json");

function asset(name) {
  try {
    const manifest = JSON.parse(fs.readFileSync(manifestPath, "utf-8"));
    return manifest[name] || name;
  } catch {
    return name;
  }
}

function indexHtml() {
  return fs
    .readFileSync(path.join(PUBLIC_DIR, "index.html"), "utf-8")
    .replace("__CORE_JS__", asset("core.min.js"))
    .replace("__VENDOR_JS__", asset("vendor.min.js"))
    .replace("__MERMAID_JS__", asset("mermaid.min.js"))
    .replace("__ALL_CSS__", asset("all.min.css"));
}

// ---- Fixtures --------------------------------------------------------------

const DAY = 24 * 60 * 60 * 1000;
const ago = (days) => new Date(Date.now() - days * DAY).toISOString();
const ahead = (days) => new Date(Date.now() + days * DAY).toISOString();

const opts = (extra) =>
  Object.assign(
    { terms: [], expirationMode: "never", update: false, page: false },
    extra || {}
  );

const repositories = [
  {
    repoId: "anonymous_github-C72C",
    status: "ready",
    anonymizeDate: ago(3),
    lastView: ago(1),
    pageView: 15,
    conference: "FSE25",
    source: { fullName: "tdurieux/anonymous_github", branch: "main", commit: "c40da900ab12" },
    options: opts({ expirationMode: "redirect", expirationDate: ahead(420), update: true, page: true }),
  },
  {
    repoId: "840c8c57-3c32-451e-bf12-0e20be300389",
    status: "ready",
    anonymizeDate: ago(120),
    lastView: ago(0.2),
    pageView: 596460,
    source: { fullName: "tdurieux/anonymous_github", branch: "main", commit: "f817a29a0000" },
    options: opts({ update: true }),
  },
  {
    // Removed link with a single view: shows the singular unit in the Removed tab.
    repoId: "icse24-artifact-7B1D",
    status: "removed",
    anonymizeDate: ago(700),
    lastView: ago(640),
    pageView: 1,
    source: { fullName: "tdurieux/icse24-artifact", branch: "main", commit: "9e1b44c20000" },
    options: opts(),
  },
  {
    repoId: "JarSift",
    status: "expired",
    anonymizeDate: ago(560),
    lastView: ago(30),
    pageView: 72,
    conference: "FSE25",
    source: { fullName: "Cornul11/JarSift", commit: "035adc67ffff" },
    options: opts({ expirationMode: "remove", expirationDate: ago(9) }),
  },
  {
    repoId: "b4751b8e-6139-4a94-84f8-646106435809",
    status: "error",
    statusMessage: "branch_not_found",
    anonymizeDate: ago(1990),
    pageView: 0,
    source: { fullName: "tdurieux/anonymous_github", branch: "master", commit: "a5b0c7c3aaaa" },
    options: opts({ update: true }),
  },
  {
    repoId: "runtime-repair-experiments-very-long-identifier-2ff4",
    status: "ready",
    anonymizeDate: ago(40),
    pageView: 5,
    conference: "International Conference on Software Engineering 2026 Artifact Track",
    source: { fullName: "Spirals-Team/runtime-repair-experiments", branch: "master", commit: "2ff4cdef1234" },
    options: opts({ expirationMode: "remove", expirationDate: ahead(1) , update: true }),
  },
  {
    repoId: "coauthored-repo-91AB",
    status: "ready",
    role: "coauthor",
    anonymizeDate: ago(12),
    pageView: 41,
    source: { fullName: "someone-else/paper-artifact", commit: "b5ab2e21dddd" },
    options: opts(),
  },
];

const pullRequests = [
  {
    pullRequestId: "5774",
    status: "ready",
    anonymizeDate: ago(2),
    lastView: ago(2),
    pageView: 9,
    source: { repositoryFullName: "vyperlang/vyper", pullRequestId: 3224 },
    options: opts(),
  },
  {
    pullRequestId: "436B",
    status: "download",
    anonymizeDate: ago(126),
    pageView: 12,
    source: { repositoryFullName: "lncapital/torq", pullRequestId: 307 },
    options: opts(),
  },
  {
    pullRequestId: "7CF7",
    status: "preparing",
    anonymizeDate: new Date(Date.now() - 5 * 60 * 1000).toISOString(),
    pageView: 0,
    source: { repositoryFullName: "Tiledesk/tiledesk-server", pullRequestId: 89 },
    options: opts(),
  },
  {
    // Legacy record without an identifier or options.
    status: "ready",
    pageView: 0,
    source: { repositoryFullName: "atmoz/sftp", pullRequestId: 357 },
  },
  {
    pullRequestId: "demo-pr",
    status: "removed",
    anonymizeDate: ago(1030),
    pageView: 319,
    source: { repositoryFullName: "tdurieux/anonymous_github", pullRequestId: 156 },
    options: opts(),
  },
];

const gists = [
  {
    gistId: "g-4f2a",
    status: "ready",
    anonymizeDate: ago(6),
    pageView: 3,
    source: { gistId: "a1b2c3d4e5f6a7b8c9d0" },
    options: opts({ expirationMode: "remove", expirationDate: ahead(90) }),
  },
];

const quota = {
  storage: { used: 5.6 * 1024 * 1024, total: 2 * 1024 * 1024 * 1024 },
  file: { used: 1381, total: 0 },
  repository: { used: 17, total: 20 },
};

// ---- Server ----------------------------------------------------------------

const app = express();

app.get(/^\/(script|css)\/(.+)\.([a-f0-9]{10})\.(min\.\w+|\w+)$/, (req, res, next) => {
  const filePath = path.join(PUBLIC_DIR, req.params[0], `${req.params[1]}.${req.params[3]}`);
  if (!fs.existsSync(filePath)) return next();
  res.setHeader("Cache-Control", "no-store");
  res.sendFile(filePath);
});

const conferences = [
  {
    conferenceID: "FSE25",
    name: "Foundations of Software Engineering 2025",
    url: "https://conf.researchr.org/home/fse-2025",
    startDate: ago(400),
    endDate: ahead(30),
    status: "ready",
    options: opts({ page: true }),
    plan: { planID: "conference", name: "Conference", pricePerRepository: 0 },
    price: 12.5,
    nbRepositories: 2,
    repositories: repositories.slice(0, 4).map((r) => Object.assign({}, r, { addDate: ago(60) })),
  },
  {
    conferenceID: "ICSE26-AE",
    name: "ICSE 2026 Artifact Evaluation",
    url: "https://conf.researchr.org/home/icse-2026",
    startDate: ahead(10),
    endDate: ahead(120),
    status: "ready",
    options: opts(),
    plan: { planID: "free_conference", name: "Free", pricePerRepository: 0 },
    price: 0,
    nbRepositories: 0,
    repositories: [],
  },
  {
    conferenceID: "FSE23",
    name: "Foundations of Software Engineering 2023",
    url: "",
    startDate: ago(1200),
    endDate: ago(900),
    status: "expired",
    options: opts(),
    plan: { planID: "free_conference", name: "Free", pricePerRepository: 0 },
    price: 0,
    nbRepositories: 3,
    repositories: [],
  },
];

const plans = [
  { id: "free_conference", name: "Free", pricePerRepo: 0, storagePerRepo: -1, description: "<li><strong>Quota is deducted from user account</strong></li><li>No download</li><li>Conference dashboard</li>" },
  { id: "premium_conference", name: "Premium", pricePerRepo: 0.5, storagePerRepo: 500 * 8 * 1024, description: "<li>500 MB per repository</li><li>Repository download</li><li>Conference dashboard</li>" },
  { id: "unlimited_conference", name: "Unlimited", pricePerRepo: 3, storagePerRepo: 0, description: "<li><strong>Unlimited</strong> repository size</li><li>Repository download</li><li>Conference dashboard</li>" },
];

const stat = { nbRepositories: 41230, nbUsers: 9870, nbPageViews: 3120000, nbPullRequests: 1480 };
// Cumulative totals with uneven daily growth (weekday peaks), so the landing
// sparklines show real variation instead of identical bars.
const wave = (i, base) => Math.round(base * (1 + 0.6 * Math.sin(i / 1.3) + 0.3 * Math.cos(i / 4)));
const cumulative = (start, base) => {
  let total = start;
  return Array.from({ length: 60 }, (_, i) => (total += Math.max(0, wave(i, base))));
};
const repoSeries = cumulative(40000, 20);
const userSeries = cumulative(9500, 6);
const viewSeries = cumulative(3000000, 2000);
const prSeries = cumulative(1400, 1);
const history = Array.from({ length: 60 }, (_, i) => ({
  date: ago(59 - i),
  nbRepositories: repoSeries[i],
  nbUsers: userSeries[i],
  nbPageViews: viewSeries[i],
  nbPullRequests: prSeries[i],
}));

// ANON=1 serves the signed-out experience (landing page, FAQ) instead;
// ADMIN=1 (or a `mock_admin=1` cookie, for one browser context only) signs in
// as an administrator so /admin pages render.
app.get("/api/user", (req, res) =>
  process.env.ANON
    ? res.status(401).json({ error: "not_connected" })
    : res.json({ username: "tdurieux", photo: "https://avatars.githubusercontent.com/u/5577568?v=4", isAdmin: !!process.env.ADMIN || /(?:^|;\s*)mock_admin=1/.test(req.headers.cookie || "") })
);
// Local connection fixtures keep the account screens usable without GitHub.
app.get("/github/connections", (req, res) => res.json({
  appEnabled: true, appConnected: true, oauthEnabled: true, oauthConnected: true,
  installations: [], gistCount: 0, resources: [], csrf: "local-preview-only",
}));
app.get("/api/options", (req, res) => res.json({ MAX_REPO_SIZE: 8 * 1024, ANONYMIZATION_MASK: "XXXX", GITHUB_APP_ENABLED: true, GITHUB_OAUTH_ENABLED: true }));
app.get("/api/message", (req, res) => res.status(404).end());
app.get("/api/user/quota", (req, res) => res.json(quota));
app.get("/api/user/anonymized_repositories", (req, res) => res.json(repositories));
app.get("/api/user/anonymized_pull_requests", (req, res) => res.json(pullRequests));
app.get("/api/user/anonymized_gists", (req, res) => res.json(gists));
app.get("/api/user/default", (req, res) =>
  res.json({ terms: ["Jane Smith", "MIT CSAIL", "jsmith"], options: { link: true, image: true, pdf: true, notebook: true, loc: true, page: false, update: false, mode: "GitHubStream", expirationMode: "remove" } })
);
app.post("/api/user/default", (req, res) => res.json({}));
// Conference review packages (billing enabled), mirroring src/core/billing/config.ts.
// Served only with a `mock_billing=1` cookie so the other screens keep the
// billing-disabled experience.
const GiB = 1024 ** 3;
const conferenceTiers = [
  { id: "conference_workshop", name: "Workshop", repositories: 25, storage: 10 * GiB, amount: 14900 },
  { id: "conference", name: "Conference", repositories: 100, storage: 50 * GiB, amount: 49000 },
  { id: "conference_large", name: "Large conference", repositories: 400, storage: 200 * GiB, amount: 149000 },
];
const billingOn = (req) => /(?:^|;\s*)mock_billing=1/.test(req.headers.cookie || "");
app.get("/api/conferences/plans", (req, res) => res.json(billingOn(req)
  ? conferenceTiers.map((t) => ({ id: t.id, name: t.name, pricePerRepo: 0, storagePerRepo: t.storage, repositories: t.repositories, description: `<li>Up to ${t.repositories} repositories</li><li>Up to 180 days</li><li>Prepaid at checkout</li>` }))
  : plans));
app.get("/api/billing/", (req, res) => billingOn(req)
  ? res.json({ enabled: true, csrf: "local-preview-only", checkoutEnabled: true, freeExpirationMonths: 12, grants: [], purchases: [], repositories: [], portal: false, allowance: null,
      plans: conferenceTiers.map((t) => ({ id: t.id, name: t.name, description: "", repositories: t.repositories, storage: t.storage, amount: t.amount, currency: "eur" })) })
  : res.status(404).json({ error: "not mocked: /api/billing/" }));
app.get("/api/conferences/", (req, res) => res.json(conferences));
app.get("/api/conferences/:id", (req, res) => {
  const c = conferences.find((x) => x.conferenceID === req.params.id);
  return c ? res.json(c) : res.status(404).json({ error: "conf_not_found" });
});
// Explorer fixture: anonymous_github-C72C has a tiny file tree; "missing-repo"
// returns the same error the live site gives for a deleted repository.
const explorerFiles = {
  "": [
    { name: "src", path: "" },
    { name: "README.md", path: "", size: 640, sha: "a1" },
    { name: "LICENSE", path: "", size: 1070, sha: "a2" },
    { name: "requirements.txt", path: "", size: 40, sha: "a3" },
  ],
  src: [
    { name: "utils", path: "src" },
    { name: "train.py", path: "src", size: 900, sha: "b1" },
  ],
  "src/utils": [{ name: "data.py", path: "src/utils", size: 300, sha: "c1" }],
};
const explorerContent = {
  "README.md": "# DeepLearnUtils\n\nDeveloped by XXXX-1 at XXXX-2.\n\nUtilities for reproducing the paper's experiments. Every script in `src/` reads its configuration from `configs/` and writes results to `out/`, so a full run of the evaluation only needs the two commands below. The long sentence here checks the reading width of rendered Markdown.\n\n## Quick start\n\n```bash\n# maintained by XXXX-1\npip install -r requirements.txt\npython src/train.py --config configs/base.yaml\n```\n\n```mermaid\ngraph LR; XXXX-2 --> Paper\n```\n\n| Model | Accuracy |\n| --- | --- |\n| Baseline | 71.2 |\n| Ours | 78.9 |\n\nContact: XXXX-3\n",
  LICENSE: "MIT License\n\nCopyright (c) 2026 XXXX-1\n",
  "requirements.txt": "torch>=2.3\nnumpy\npyyaml\n",
  "src/train.py": '# Copyright 2026 XXXX-1, XXXX-2\nimport argparse\nimport yaml\n\nfrom utils.data import load_dataset\n\n\ndef main():\n    parser = argparse.ArgumentParser(description="Train the model")\n    parser.add_argument("--config", required=True)\n    args = parser.parse_args()\n    with open(args.config) as f:\n        config = yaml.safe_load(f)\n    dataset = load_dataset(config["data"])\n    print(f"Loaded {len(dataset)} examples")\n\n\nif __name__ == "__main__":\n    main()\n',
  "src/utils/data.py": "def load_dataset(path):\n    with open(path) as f:\n        return [line.strip() for line in f]\n",
};
const EXPLORER_ID = "anonymous_github-C72C";
app.get("/api/repo/missing-repo/{*rest}", (req, res) =>
  res.status(404).json({ error: "repo_not_found" })
);
app.get(`/api/repo/${EXPLORER_ID}/options`, (req, res) =>
  res.json({
    url: null,
    download: true,
    lastUpdateDate: ago(3),
    anonymizedAt: ago(3),
    sourceCommitDate: ago(4),
    expirationDate: ahead(60),
    isAdmin: false,
    isOwner: true,
    hasWebsite: false,
    truncatedFolders: [],
    hasSubmodules: false,
  })
);
app.get(`/api/repo/${EXPLORER_ID}/files/counts`, (req, res) =>
  res.json({ "": 6, src: 2, "src/utils": 1 })
);
app.get(`/api/repo/${EXPLORER_ID}/files`, (req, res) =>
  res.json(explorerFiles[req.query.path || ""] || [])
);
app.get(`/api/repo/${EXPLORER_ID}/file/{*rest}`, (req, res) => {
  const file = req.params.rest.join("/");
  if (!(file in explorerContent)) return res.status(404).json({ error: "file_not_found" });
  res.type("text/plain").send(explorerContent[file]);
});

// Viewer gallery: a second explorer fixture with one file of every kind the
// reviewer view renders (PDF, image, SVG, video, notebook, CSV, binary, empty
// file, empty folder, and a file over the size limit). Binaries live in
// scripts/fixtures/explorer-gallery; content types follow the real file route.
const GALLERY_ID = "replication-package-5E1A";
const GALLERY_DIR = path.join(__dirname, "fixtures", "explorer-gallery");
const galleryPng = fs.readFileSync(path.join(GALLERY_DIR, "figures", "accuracy.png"));
const galleryNotebook = JSON.stringify({
  nbformat: 4, nbformat_minor: 5,
  metadata: { kernelspec: { name: "python3", display_name: "Python 3" }, language_info: { name: "python" } },
  cells: [
    { cell_type: "markdown", metadata: {}, source: ["# Results analysis\n", "\n", "Reproduces Table 2 and Figure 1 of the paper. Run the cells in order; the data is loaded from `results.csv`."] },
    { cell_type: "code", execution_count: 1, metadata: {}, outputs: [], source: ["import pandas as pd\n", "df = pd.read_csv(\"results.csv\")\n", "df.groupby(\"model\").accuracy.mean()"] },
    { cell_type: "code", execution_count: 2, metadata: {}, source: ["print(f\"{len(df)} runs by XXXX-1\")"], outputs: [{ output_type: "stream", name: "stdout", text: ["12 runs by XXXX-1\n"] }] },
    { cell_type: "code", execution_count: 3, metadata: {}, source: ["df.pivot_table(index=\"model\", values=[\"accuracy\", \"plausible\"]).round(1)"], outputs: [{ output_type: "execute_result", execution_count: 3, metadata: {}, data: {
      "text/html": ["<table border=\"1\" class=\"dataframe\"><thead><tr><th>model</th><th>accuracy</th><th>plausible</th></tr></thead><tbody><tr><th>Baseline</th><td>71.2</td><td>412.0</td></tr><tr><th>+ Aug.</th><td>74.0</td><td>447.0</td></tr><tr><th>Ours</th><td>78.9</td><td>503.0</td></tr></tbody></table>"],
      "text/plain": ["          accuracy  plausible\nBaseline      71.2      412.0\nOurs          78.9      503.0"] } }] },
    { cell_type: "markdown", metadata: {}, source: ["## Figure 1\n", "\n", "Accuracy of each configuration on the held-out split."] },
    { cell_type: "code", execution_count: 4, metadata: {}, source: ["ax = df.groupby(\"model\").accuracy.mean().plot.bar()\n", "ax.figure.savefig(\"figures/accuracy.png\")"], outputs: [{ output_type: "display_data", metadata: {}, data: { "image/png": galleryPng.toString("base64"), "text/plain": ["<Figure size 720x400 with 1 Axes>"] } }] },
  ],
}, null, 1);
const galleryText = {
  "README.md": "# Replication package\n\nArtifact for *Learning Robust Repair Strategies from Developer Histories*, prepared by XXXX-1.\n\n| File | What it shows |\n| --- | --- |\n| `paper.pdf` | The submitted paper |\n| `analysis.ipynb` | Notebook that rebuilds Table 2 and Figure 1 |\n| `figures/` | Figures as PNG and SVG |\n| `demo/` | A short screen recording of a full run |\n\n![Accuracy](figures/accuracy.png)\n",
  "results.csv": "model,seed,accuracy,plausible\nBaseline,1,71.0,410\nBaseline,2,71.4,414\n+ Aug.,1,73.8,445\n+ Aug.,2,74.2,449\n+ Pretrain,1,76.0,470\n+ Pretrain,2,76.2,472\nOurs,1,78.7,501\nOurs,2,79.1,505\n",
  "figures/pipeline.svg": '<svg xmlns="http://www.w3.org/2000/svg" width="640" height="200" viewBox="0 0 640 200" font-family="Inter, Arial, sans-serif" font-size="14"><rect width="640" height="200" fill="#ffffff"/><g fill="#eef6f4" stroke="#1f6f66" stroke-width="1.5"><rect x="20" y="70" width="150" height="60" rx="8"/><rect x="245" y="70" width="150" height="60" rx="8"/><rect x="470" y="70" width="150" height="60" rx="8"/></g><g fill="#1b1a18" text-anchor="middle"><text x="95" y="105">Mine histories</text><text x="320" y="105">Pretrain on edits</text><text x="545" y="105">Rank patches</text></g><g stroke="#6f6a61" stroke-width="1.5" marker-end="url(#a)"><line x1="172" y1="100" x2="240" y2="100"/><line x1="397" y1="100" x2="465" y2="100"/></g><defs><marker id="a" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto"><path d="M0 0L10 5L0 10z" fill="#6f6a61"/></marker></defs></svg>\n',
  "analysis.ipynb": galleryNotebook,
  "logs/.gitkeep": "",
};
const galleryBinary = { "paper.pdf": "paper.pdf", "figures/accuracy.png": "figures/accuracy.png", "demo/demo.mp4": "demo/demo.mp4", "demo/demo.webm": "demo/demo.webm" };
// Deterministic bytes standing in for a model checkpoint.
const galleryCheckpoint = Buffer.from(Array.from({ length: 4096 }, (_, i) => (i * 131 + 7) % 256));
const gallerySize = (name) =>
  galleryBinary[name] ? fs.statSync(path.join(GALLERY_DIR, galleryBinary[name])).size
    : name === "models/checkpoint.bin" ? galleryCheckpoint.length
    : name === "data/train.parquet" ? 312 * 1024 * 1024
    : Buffer.byteLength(galleryText[name] || "");
const galleryTree = {
  "": ["data", "demo", "figures", "logs", "models", "outputs", "README.md", "analysis.ipynb", "paper.pdf", "results.csv"],
  data: ["train.parquet"],
  demo: ["demo.mp4", "demo.webm"],
  figures: ["accuracy.png", "pipeline.svg"],
  logs: [".gitkeep"],
  models: ["checkpoint.bin"],
  outputs: [],
};
const galleryFiles = (dir) => (galleryTree[dir] || []).map((name, i) => {
  const full = (dir ? dir + "/" : "") + name;
  return full in galleryTree ? { name, path: dir } : { name, path: dir, size: gallerySize(full), sha: "g" + dir.length + i };
});
app.get(`/api/repo/${GALLERY_ID}/options`, (req, res) =>
  res.json({ url: null, download: true, lastUpdateDate: ago(5), anonymizedAt: ago(5), sourceCommitDate: ago(6), expirationDate: ahead(90), isAdmin: false, isOwner: false, hasWebsite: false, truncatedFolders: [], hasSubmodules: false })
);
app.get(`/api/repo/${GALLERY_ID}/files/counts`, (req, res) =>
  res.json({ "": 13, data: 1, demo: 2, figures: 2, logs: 1, models: 1, outputs: 0 })
);
app.get(`/api/repo/${GALLERY_ID}/files`, (req, res) => res.json(galleryFiles(req.query.path || "")));
app.get(`/api/repo/${GALLERY_ID}/file/{*rest}`, (req, res) => {
  const file = req.params.rest.join("/");
  if (req.query.download) res.attachment(path.basename(file));
  if (file === "data/train.parquet") return res.status(413).json({ error: "file_too_big" });
  if (file === "models/checkpoint.bin") return res.type("application/octet-stream").send(galleryCheckpoint);
  if (galleryBinary[file]) return res.sendFile(path.join(GALLERY_DIR, galleryBinary[file]));
  if (file in galleryText) {
    const mime = require("mime-types").lookup(file);
    return res.type(mime && !file.endsWith(".ts") ? mime : "text/plain").send(galleryText[file]);
  }
  res.status(404).json({ error: "file_not_found" });
});

// Anonymize workspace source: https://github.com/jsmith/robust-repair. The
// files carry the mock's default terms (Jane Smith, MIT CSAIL, jsmith) so the
// preview's redactions, its file viewer and the "Leave files unredacted"
// cases (a docs/ README, a bibliography) can be checked without GitHub.
// Same endpoints as src/server/routes/repository-private.ts.
const SOURCE = { owner: "jsmith", repo: "robust-repair", commit: "5be2a7c1d0e94f3b8a6c2d1e0f9a8b7c6d5e4f3a" };
const sourceText = {
  "README.md": "# Robust Repair\n\nCode and data for *Learning Robust Repair Strategies from Developer Histories* by Jane Smith (MIT CSAIL).\n\n![Overview](figures/overview.png)\n\n## Getting started\n\n```bash\ngit clone https://github.com/jsmith/robust-repair\npip install -r requirements.txt\npython src/train.py --config configs/base.yaml\n```\n\nThe full documentation is in [docs/](docs/README.md). Questions: open an issue or write to Jane Smith.\n\n## Layout\n\n| Folder | Content |\n| --- | --- |\n| `src/` | Training and evaluation code |\n| `paper/` | LaTeX sources of the paper |\n| `configs/` | Experiment configurations |\n",
  "docs/README.md": "# Documentation\n\nMaintained by Jane Smith at MIT CSAIL. See [usage](usage.md) for the command line.\n",
  "docs/usage.md": "# Usage\n\n```bash\npython src/train.py --config configs/base.yaml --seed 1\n```\n\nRuns from the jsmith cluster write to `out/`.\n",
  "src/train.py": "# Copyright 2026 Jane Smith, MIT CSAIL\n\"\"\"Train the repair model (contact: jsmith).\"\"\"\nimport argparse\n\nimport yaml\n\nfrom jsmith_utils import load_dataset\n\n\ndef main():\n    parser = argparse.ArgumentParser(description=\"Train the model\")\n    parser.add_argument(\"--config\", required=True)\n    parser.add_argument(\"--seed\", type=int, default=1)\n    args = parser.parse_args()\n    with open(args.config) as f:\n        config = yaml.safe_load(f)\n    dataset = load_dataset(config[\"data\"])\n    print(f\"Loaded {len(dataset)} examples for Jane Smith's run\")\n\n\nif __name__ == \"__main__\":\n    main()\n",
  "src/jsmith-utils/io.js": "// Helpers shared by the evaluation scripts. Author: Jane Smith <jane.smith@csail.mit.edu>\nconst fs = require(\"fs\");\n\n/** Reads one JSON object per line. */\nfunction readJsonLines(path) {\n  return fs.readFileSync(path, \"utf8\").split(\"\\n\").filter(Boolean).map((line) => JSON.parse(line));\n}\n\nmodule.exports = { readJsonLines, lab: \"MIT CSAIL\" };\n",
  "paper/main.tex": "\\documentclass{article}\n\\title{Learning Robust Repair Strategies from Developer Histories}\n\\author{Jane Smith \\\\ MIT CSAIL}\n\n\\begin{document}\n\\maketitle\n\n\\section{Introduction}\nWe build on our earlier work~\\cite{smith2024repair}, done at MIT CSAIL.\n\n\\bibliographystyle{plain}\n\\bibliography{refs}\n\\end{document}\n",
  "paper/refs.bib": "@inproceedings{smith2024repair,\n  title     = {Repairing Programs with Developer Histories},\n  author    = {Jane Smith and Ana Lopez},\n  booktitle = {Proceedings of ICSE},\n  year      = {2024},\n  note      = {MIT CSAIL}\n}\n",
  "configs/base.yaml": "# Base configuration (Jane Smith)\ndata: data/train.jsonl\nmodel: transformer-small\nseed: 1\noutput: /home/jsmith/out\n",
  "requirements.txt": "torch>=2.3\nnumpy\npyyaml\n",
  LICENSE: "MIT License\n\nCopyright (c) 2026 Jane Smith\n",
  // Long and nested names for the tree (wrapping, middle truncation, slots).
  "experiments/jsmith-ablations/2026-03/robust_repair_baseline_with_pretraining_and_augmentation_seed_1_jsmith_final.yaml": "seed: 1\nowner: jsmith\n",
  "experiments/jsmith-ablations/2026-03/notes-for-Jane Smith.md": "# Notes\n\nAblations run by Jane Smith.\n",
};
// figures/overview.png reuses the gallery image; data/train.csv is over the 1 MB preview limit.
const sourceBinary = ["figures/overview.png"];
const sourceTooBig = ["data/train.csv"];
const sourceAccess = (req, res) => {
  if (/^[0-9a-f]{6,40}$/i.test(String(req.query.commit || ""))) return true;
  res.status(400).json({ error: "invalid_commit_format" });
  return false;
};
const SOURCE_BASE = `/api/repo/${SOURCE.owner}/${SOURCE.repo}`;
app.get(SOURCE_BASE + "/", (req, res) => res.json({
  id: "mock-source-1", externalId: "gh_910001", repo: SOURCE.repo, owner: SOURCE.owner,
  hasPage: false, fullName: `${SOURCE.owner}/${SOURCE.repo}`, defaultBranch: "main", size: 2048,
}));
app.get(SOURCE_BASE + "/branches", (req, res) => res.json([
  { name: "main", commit: SOURCE.commit, readme: sourceText["README.md"] },
  { name: "camera-ready", commit: "9a8b7c6d5e4f3a2b1c0d9e8f7a6b5c4d3e2f1a0b" },
]));
app.get(SOURCE_BASE + "/readme", (req, res) => res.type("text/plain").send(sourceText["README.md"]));
app.get(SOURCE_BASE + "/tree", (req, res) => {
  if (!sourceAccess(req, res)) return;
  res.set("Cache-Control", "private, no-store");
  res.json({ files: [...Object.keys(sourceText), ...sourceTooBig].sort(), binaryFiles: sourceBinary, truncated: false });
});
app.get(SOURCE_BASE + "/file", (req, res) => {
  if (!sourceAccess(req, res)) return;
  const file = String(req.query.path || "");
  if (!file || file.split("/").some((part) => !part || part === "." || part === "..") || /[\\\0]/.test(file)) {
    return res.status(400).json({ error: "invalid_path" });
  }
  res.set("Cache-Control", "private, no-store");
  // MOCK_FILE_DELAY=ms holds the response so the loading state can be captured.
  global.setTimeout(() => {
    if (sourceTooBig.includes(file)) return res.status(413).json({ error: "file_too_big" });
    if (sourceBinary.includes(file)) return res.json({ binary: true, size: galleryPng.length });
    if (!(file in sourceText)) return res.status(404).json({ error: "file_not_found" });
    res.type("text/plain; charset=utf-8").send(sourceText[file]);
  }, Number(process.env.MOCK_FILE_DELAY || 150));
});
// Use the production anonymizer for both sides of the visual comparison.
require("ts-node/register/transpile-only");
const { ContentAnonimizer } = require("../src/core/anonymize-utils");
const { isPreservedPath } = require("../src/core/preserve-files");
const fixtureOptions = { terms: ["Jane Smith", "MIT CSAIL", "jsmith"], image: true, link: true, repoName: "jsmith/robust-repair", branchName: "main", repoId: "robust-repair-preview" };
function anonymizeFixture(text, opt) {
  return new ContentAnonimizer({ ...opt, terms: isPreservedPath(opt.filePath, opt.preserveFiles) ? [] : opt.terms }).anonymize(text);
}
app.post("/api/anonymize-preview", express.json({ limit: "4mb" }), (req, res) => {
  const body = req.body || {}, opt = body.options || {};
  res.set("Cache-Control", "private, no-store");
  if (typeof body.content === "string") return res.json({ content: anonymizeFixture(body.content, opt) });
  if (Array.isArray(body.contents) && body.contents.every(c => typeof c === "string")) return res.json({ contents: body.contents.map(text => anonymizeFixture(text, opt)) });
  res.status(400).json({ error: "missing_content" });
});
// A reviewer repository generated from the exact source fixtures above.
const fixturePath = path => anonymizeFixture(path, { terms: fixtureOptions.terms });
const fixturePaths = [...Object.keys(sourceText), ...sourceBinary, ...sourceTooBig];
app.get("/api/repo/robust-repair-preview/options", (req, res) => res.json({ download: true, truncatedFolders: [], hasSubmodules: false }));
app.get("/api/repo/robust-repair-preview/files/counts", (req, res) => res.json({ "": fixturePaths.length }));
app.get("/api/repo/robust-repair-preview/files", (req, res) => {
  const dir = String(req.query.path || ""), entries = new Map();
  for (const sourcePath of fixturePaths) {
    const name = fixturePath(sourcePath);
    if (dir && !name.startsWith(dir + "/")) continue;
    const rest = dir ? name.slice(dir.length + 1) : name;
    const [first, ...nested] = rest.split("/");
    entries.set(first, nested.length ? { name: first, path: dir } : { name: first, path: dir, size: Buffer.byteLength(sourceText[sourcePath] || ""), sha: "fixture" });
  }
  res.json([...entries.values()]);
});
app.get("/api/repo/robust-repair-preview/file/{*rest}", (req, res) => {
  const sourcePath = fixturePaths.find(file => fixturePath(file) === req.params.rest.join("/"));
  if (sourceTooBig.includes(sourcePath)) return res.status(413).json({ error: "file_too_big" });
  if (sourceBinary.includes(sourcePath)) return res.type("png").send(galleryPng);
  if (!sourcePath) return res.status(404).json({ error: "file_not_found" });
  res.type("text/plain").send(anonymizeFixture(sourceText[sourcePath], { ...fixtureOptions, filePath: sourcePath }));
});

app.get("/api/repo/:id", (req, res) => {
  const r = repositories.find((x) => x.repoId === req.params.id) || repositories[0];
  res.json(r);
});
app.get("/api/stat", (req, res) => res.json(stat));
app.get("/api/stat/history", (req, res) => res.json(history));

// ---- Admin fixtures (ADMIN=1) ------------------------------------------------
// Shapes follow src/server/routes/admin.ts: list endpoints return raw Mongo
// documents, the user detail returns User.toJSON() with populated GitHub
// repositories, and queue jobs follow the /api/admin/queues response.

const HOUR = 60 * 60 * 1000;
const MB = 1024 * 1024;
const oid = (n) => "65f0c0de" + String(n).padStart(16, "0");

const adminUsers = [
  { n: 1, username: "tdurieux", email: "thomas@durieux.me", isAdmin: true, days: 2400, photo: "https://avatars.githubusercontent.com/u/5577568?v=4", repos: 17 },
  { n: 2, username: "alice-research", email: "alice@cs.example.edu", days: 30, repos: 3 },
  { n: 3, username: "bob-lab", email: "bob.lab@uni-example.de", days: 410, repos: 142 },
  { n: 4, username: "spammer-9000", email: "free.crypto.giveaway@mail.example", status: "banned", days: 12, repos: 0 },
  { n: 5, username: "noemail-user", email: null, days: 800, repos: 1 },
  { n: 6, username: "carol", email: "carol@example.org", status: "removed", days: 1500, repos: 0 },
  { n: 7, username: "a-very-long-github-username-for-layout-tests", email: "someone.with.a.really.long.address@department.faculty.university.example.ac.uk", days: 90, repos: 6 },
  { n: 8, username: "dmitri", email: "dmitri@example.ru", isAdmin: true, days: 5, repos: 2 },
].map((u) => ({
  _id: oid(u.n),
  username: u.username,
  emails: u.email ? [{ email: u.email, default: true, _id: oid(100 + u.n) }] : [],
  isAdmin: !!u.isAdmin,
  photo: u.photo || "https://avatars.githubusercontent.com/u/" + (1000 + u.n) + "?v=4",
  repositories: Array.from({ length: u.repos }, (_, i) => String(70000000 + u.n * 1000 + i)),
  status: u.status || "active",
  dateOfEntry: ago(u.days),
  accessTokenDates: u.status === "removed" ? {} : { github: ago(Math.min(u.days, 3)) },
  externalIDs: { github: String(1000 + u.n) },
  default: { terms: [], options: { expirationMode: "remove", update: false, image: true, pdf: true, notebook: true, link: true } },
  __v: 0,
}));

// Anonymized repositories as stored in Mongo (source.repositoryName, size.storage).
const adminRepo = (r) => ({
  _id: oid(200 + r.n),
  repoId: r.repoId,
  status: r.status,
  statusDate: r.statusDate || ago(r.days),
  statusMessage: r.statusMessage,
  anonymizeDate: ago(r.days),
  lastView: r.lastView,
  pageView: r.pageView || 0,
  owner: oid(r.owner || 1),
  coauthors: [],
  conference: r.conference,
  source: { type: "GitHubStream", branch: r.branch || "main", commit: r.commit || "c40da900ab12ef34", repositoryId: String(500000 + r.n), repositoryName: r.fullName },
  truncatedFolders: [],
  options: opts(Object.assign({ terms: r.terms || ["Jane Smith", "MIT CSAIL"] }, r.options)),
  dateOfEntry: ago(r.days),
  size: { storage: (r.storage || 0) * 8, file: r.files || 0 }, // stored in bits, like prod
  isReseted: false,
  __v: 0,
});
const adminRepos = [
  { n: 1, repoId: "anonymous_github-C72C", status: "ready", days: 3, lastView: ago(0.1), pageView: 1520, conference: "FSE25", fullName: "tdurieux/anonymous_github", storage: 48 * MB, files: 1381, options: { update: true, page: true } },
  { n: 2, repoId: "dl-benchmark-2026", status: "error", days: 0.5, owner: 2, fullName: "alice-research/dl-benchmark", statusMessage: "repository_too_big: The repository exceeds the maximum size of 8 GB (measured 11.4 GB across 214,331 files). Remove large assets (datasets, model checkpoints, LFS objects) from the branch or anonymize a smaller subfolder, then retry.", terms: ["Alice Martin"] },
  { n: 3, repoId: "JarSift", status: "expired", days: 560, lastView: ago(30), pageView: 72, conference: "FSE25", fullName: "Cornul11/JarSift", options: { expirationMode: "remove", expirationDate: ago(9) } },
  { n: 4, repoId: "fuzz-harness-7F21", status: "download", days: 0.01, owner: 3, fullName: "bob-lab/fuzz-harness", branch: "artifact-eval" },
  { n: 5, repoId: "old-paper-artifact", status: "removed", days: 1200, owner: 6, lastView: ago(900), pageView: 33, fullName: "carol/old-paper-artifact" },
  { n: 6, repoId: "runtime-repair-experiments-very-long-identifier-for-the-icse-artifact-track-2ff4", status: "ready", days: 40, owner: 7, lastView: ago(2), pageView: 5, conference: "ICSE26-AE", fullName: "a-very-long-github-username-for-layout-tests/runtime-repair-experiments", branch: "camera-ready-final-v2", storage: 3.2 * 1024 * MB, files: 48211, options: { update: true } },
  { n: 7, repoId: "crypto-airdrop", status: "removing", days: 12, owner: 4, fullName: "spammer-9000/crypto-airdrop", pageView: 4 },
  { n: 8, repoId: "graph-mining-A91B", status: "ready", days: 220, owner: 3, lastView: ago(14), pageView: 596460, fullName: "bob-lab/graph-mining", storage: 210 * MB, files: 3102, terms: [] },
  { n: 9, repoId: "b4751b8e-6139-4a94-84f8-646106435809", status: "error", days: 1990, owner: 5, fullName: "noemail-user/thesis-code", branch: "master", statusMessage: "branch_not_found" },
  { n: 10, repoId: "llm-eval-suite", status: "preparing", days: 0.002, owner: 8, fullName: "dmitri/llm-eval-suite" },
  { n: 11, repoId: "smart-contract-audit", status: "expiring", days: 365, owner: 2, lastView: ago(1), pageView: 210, conference: "FSE25", fullName: "alice-research/smart-contract-audit", storage: 12 * MB, files: 240, options: { expirationMode: "redirect", expirationDate: ago(0.1) } },
].map(adminRepo);

// Repository.toJSON() as returned by /api/admin/users/:username/repos.
const repoView = (r) => ({
  repoId: r.repoId,
  options: r.options,
  coauthors: r.coauthors,
  conference: r.conference,
  anonymizeDate: r.anonymizeDate,
  status: r.status,
  statusMessage: r.statusMessage,
  lastView: r.lastView,
  pageView: r.pageView,
  size: r.status === "ready" ? r.size : { storage: 0, file: 0 },
  source: { repositoryID: r.source.repositoryId, fullName: r.source.repositoryName, commit: r.source.commit, branch: r.source.branch, type: r.source.type },
});

// Populated GitHub repositories on the user detail (Repository model).
const githubRepos = (u) =>
  u.repositories.slice(0, 40).map((id, i) => ({
    _id: oid(9000 + i),
    externalId: "gh_" + id,
    name: u.username + "/" + ["paper-artifact", "dataset-tools", "experiments", "website", "dotfiles", "replication-package-with-a-long-name"][i % 6] + (i >= 6 ? "-" + i : ""),
    url: "https://github.com/" + u.username,
    source: "github",
    hasPage: i % 4 === 0,
    branches: [],
    defaultBranch: "main",
    size: [120, 48213, 3, 980000, 0, 15400][i % 6],
    status: "ready",
    dateOfEntry: ago(30 + i),
    __v: 0,
  }));

const statusCounts = (rows, withStorage) => {
  const map = {};
  rows.forEach((r) => {
    const row = (map[r.status] = map[r.status] || { _id: r.status, count: 0 });
    row.count++;
    if (withStorage) row.storage = (row.storage || 0) + (r.size ? r.size.storage : 0);
  });
  return Object.values(map);
};
const page = (req, rows, withStorage) => {
  const counts = statusCounts(rows, withStorage);
  const sort = { [req.query.sort || "_id"]: req.query.direction === "asc" ? 1 : -1 };
  // Status flags filter like src/server/routes/admin.ts; counts stay global.
  const groups = { ready: ["ready"], error: ["error"], expired: ["expired", "expiring"], removed: ["removed", "removing"], preparing: ["preparing", "download"] };
  if (Object.keys(groups).some((k) => req.query[k] != null)) {
    const allowed = Object.keys(groups).filter((k) => req.query[k] == "true").flatMap((k) => groups[k]);
    if (allowed.length) rows = rows.filter((r) => allowed.includes(r.status));
  }
  const out = { query: {}, page: parseInt(req.query.page, 10) || 1, total: rows.length, sort, results: rows, statusCounts: counts };
  if (withStorage) out.totalSize = counts.reduce((t, c) => t + (c.storage || 0), 0);
  return out;
};

// Conferences as stored in Mongo (repositories are {id, addDate} refs).
const adminConferences = [
  { conferenceID: "FSE25", name: "Foundations of Software Engineering 2025", url: "https://conf.researchr.org/home/fse-2025", startDate: ago(400), endDate: ahead(30), status: "ready", plan: { planID: "premium_conference", pricePerRepository: 0.5, quota: { repository: 0, size: 500 * 8 * 1024, file: 0 } }, price: 12.5, repos: 25 },
  { conferenceID: "ICSE26-AE", name: "ICSE 2026 Artifact Evaluation", url: "https://conf.researchr.org/home/icse-2026", startDate: ahead(10), endDate: ahead(120), status: "preparing", plan: { planID: "unlimited_conference", pricePerRepository: 3, quota: { repository: 0, size: 0, file: 0 } }, price: 1260, repos: 420 },
  { conferenceID: "FSE23", name: "Foundations of Software Engineering 2023", url: "", startDate: ago(1200), endDate: ago(900), status: "expired", plan: { planID: "free_conference", pricePerRepository: 0 }, repos: 3 },
  { conferenceID: "MSR-WORKSHOP-ON-REPRODUCIBILITY-AND-OPEN-SCIENCE-2026", name: "International Workshop on Reproducibility, Replicability and Open Science in Mining Software Repositories", url: "https://example.org/msr-ros", startDate: ago(20), endDate: ahead(5), status: "error", plan: { planID: "free_conference", pricePerRepository: 0 }, repos: 0 },
].map((c, i) => ({
  _id: oid(300 + i),
  name: c.name,
  conferenceID: c.conferenceID,
  url: c.url,
  startDate: c.startDate,
  endDate: c.endDate,
  status: c.status,
  owners: [oid(1)],
  repositories: Array.from({ length: c.repos }, (_, j) => ({ id: oid(5000 + j), addDate: ago(j % 60), _id: oid(6000 + j) })),
  options: { expirationMode: "remove", expirationDate: c.endDate, update: false, image: true, pdf: true, notebook: true, link: true, page: false },
  dateOfEntry: c.startDate,
  plan: c.plan,
  price: c.price,
  billing: c.price ? { name: "Program Chairs", email: "chairs@example.org", country: "DE" } : undefined,
  __v: 0,
}));

// ---- Overview & performance

const overview = {
  system: {
    platform: "linux", arch: "x64", nodeVersion: "v22.11.0", uptime: 3 * 86400 + 7 * 3600 + 120,
    cpuCount: 8, cpuPercent: 37, loadAvg: [2.96, 2.41, 2.2],
    memTotal: 32 * 1024 * MB, memFree: 9.5 * 1024 * MB, memUsed: 22.5 * 1024 * MB, memPercent: 70,
    processRss: 612 * MB, processHeapUsed: 280 * MB, processHeapTotal: 350 * MB,
    diskTotal: 1000 * 1024 * MB, diskUsed: 912 * 1024 * MB, diskFree: 88 * 1024 * MB, diskPercent: 91, diskMount: "/",
  },
  repos: {
    total: 41230,
    statusBreakdown: [
      { _id: "ready", count: 30112, storage: 1.9e12 },
      { _id: "expired", count: 6200, storage: 0 },
      { _id: "removed", count: 3810, storage: 0 },
      { _id: "error", count: 920, storage: 0 },
      { _id: "download", count: 14, storage: 0 },
      { _id: "preparing", count: 6, storage: 0 },
      { _id: "expiring", count: 120, storage: 2e9 },
      { _id: "removing", count: 48, storage: 0 },
    ],
    totalStorage: 1.902e12,
    recentErrors24h: 17,
    activeRepos24h: 2310,
    newRepos24h: 64,
  },
  users: { total: 9870, newUsers24h: 23 },
  conferences: { total: adminConferences.length },
  queues: {
    download: { waiting: 12, active: 4, completed: 1840, failed: 7, delayed: 2 },
    remove: { waiting: 0, active: 1, completed: 310, failed: 0, delayed: 0 },
    cache: { waiting: 230, active: 2, completed: 9120, failed: 41, delayed: 0 },
  },
  errors: { last24h: 312, severity: { error: 41, warn: 118, info: 153 } },
  // Same daily rows as the landing stats, last 30 days only.
  history: history.slice(-30),
};

const LATENCY_BUCKETS = [10, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 30000, 60000];
const metricRow = (service, metric, route, method, count, avgMs, p95, p99, extra) =>
  Object.assign({
    metric, route, method, count, sumMs: count * avgMs, bytes: 0, aborted: 0, errors: 0, slow: 0,
    buckets: LATENCY_BUCKETS.map((b, i) => (b >= avgMs && i < 6 ? Math.round(count / 6) : 0)).concat([0]),
    service, avgMs, p95UpperMs: p95, p99UpperMs: p99,
  }, extra || {});
const instance = (name, service, extra) => Object.assign({
  instance: name, service, sampledAt: Date.now() - 8000, uptime: 86400, cpuPercent: 12.4,
  memoryLimitBytes: 2048 * MB, memory: { rss: 410 * MB, heapTotal: 300 * MB, heapUsed: 220 * MB, external: 30 * MB, arrayBuffers: 4 * MB },
  activeRequests: 3, sockets: { descriptors: 42, established: 38, closeWait: 0, listening: 1, truncated: false },
  workers: null, eventLoop: { utilization: 0.21, p95Ms: 18.2, maxMs: 64 }, droppedMetrics: 0, droppedBatches: 0, lastFlushAt: Date.now() - 8000,
}, extra || {});
const performanceFor = (minutes) => {
  const windowMinutes = minutes === 60 ? 60 : 15;
  const scale = windowMinutes / 15;
  const n = (v) => Math.round(v * scale);
  const now = Math.floor(Date.now() / 60000) * 60000;
  const instances = [
    instance("api:anon-api-7c9d4", "api"),
    instance("api:anon-api-b21fe", "api", { cpuPercent: 88.6, eventLoop: { utilization: 0.83, p95Ms: 142.7, maxMs: 910 }, activeRequests: 57 }),
    instance("streamer:anon-streamer-0", "streamer", { memory: { rss: 1780 * MB, heapTotal: 900 * MB, heapUsed: 700 * MB, external: 600 * MB, arrayBuffers: 500 * MB },
      sockets: { descriptors: 210, established: 180, closeWait: 6, listening: 1, truncated: false }, workers: { running: 4, waiting: 11, reservedBytes: 640 * MB } }),
    instance("streamer:anon-streamer-1", "streamer", { sampledAt: Date.now() - 70000, sockets: null, workers: { running: 0, waiting: 0, reservedBytes: 0 }, droppedBatches: 2, droppedMetrics: 130 }),
  ];
  return {
    available: true,
    generatedAt: Date.now(),
    windowMinutes,
    instances,
    routes: [
      metricRow("streamer", "request", "/api/repo/:repoId/file/:path", "GET", n(18230), 240, 1000, 5000, { bytes: n(9.1e9), aborted: n(41), errors: n(3), slow: n(88), firstByteCount: n(18100), firstByteP95UpperMs: 500 }),
      metricRow("api", "request", "/api/repo/:repoId/files", "GET", n(9120), 85, 250, 1000, { firstByteCount: n(9120), firstByteP95UpperMs: 250 }),
      metricRow("api", "request", "/api/repo/:repoId/zip", "GET", n(37), 18400, 30000, null, { bytes: n(4.2e9), aborted: n(9), slow: n(31), firstByteCount: n(37), firstByteP95UpperMs: 2500 }),
      metricRow("api", "request", "/api/admin/overview", "GET", n(30), 410, 1000, 1000, { firstByteCount: n(30), firstByteP95UpperMs: 1000 }),
      metricRow("api", "request", "/api/repo/:repoId/refresh", "POST", n(12), 3100, 10000, 10000, { errors: n(4), firstByteCount: 0, firstByteP95UpperMs: null }),
      metricRow("api", "request", "/api/user", "GET", n(5400), 6, 10, 50, { firstByteCount: n(5400), firstByteP95UpperMs: 10 }),
    ].sort((a, b) => b.sumMs - a.sumMs),
    stages: [
      metricRow("streamer", "repository", "all", "all", n(18230), 4, 10, 50),
      metricRow("streamer", "authorization", "all", "all", n(18230), 2, 10, 10),
      metricRow("streamer", "upstream", "all", "all", n(2100), 620, 2500, 10000, { errors: n(12) }),
      metricRow("streamer", "cache_lookup", "all", "all", n(18230), 3, 10, 50),
      metricRow("streamer", "cache_fill", "all", "all", n(2100), 140, 500, 1000),
      metricRow("streamer", "worker_wait", "all", "all", n(1600), 380, 2500, 5000),
      metricRow("streamer", "anonymize", "all", "all", n(2100), 55, 250, 500),
      metricRow("streamer", "source_hit", "all", "all", n(16130), 0, 10, 10),
      metricRow("streamer", "source_miss", "all", "all", n(2100), 0, 10, 10),
      metricRow("streamer", "first_byte", "/api/repo/:repoId/file/:path", "GET", n(18100), 90, 500, 1000),
    ],
    series: Array.from({ length: windowMinutes }, (_, i) => ({
      minute: now - (windowMinutes - 1 - i) * 60000,
      requests: 900 + Math.round(400 * Math.sin(i / 2)), aborted: i % 5 === 0 ? 3 : 0, errors: i === 7 ? 4 : 0, sumMs: 90000 + i * 1200,
    })),
    runtimeSeries: instances.flatMap((s) => Array.from({ length: windowMinutes * 4 }, (_, i) => ({
      instance: s.instance, service: s.service, sampledAt: Date.now() - i * 15000,
      rss: s.memory.rss * (1 + 0.2 * Math.sin(i / 5)), heapUsed: s.memory.heapUsed, external: s.memory.external,
      cpuPercent: s.cpuPercent, loopP95Ms: s.eventLoop.p95Ms, sockets: s.sockets ? s.sockets.descriptors : null,
      closeWait: s.sockets ? s.sockets.closeWait : null, waiting: s.workers ? s.workers.waiting : 0, reservedBytes: s.workers ? s.workers.reservedBytes : 0,
    }))),
    latencyBucketsMs: LATENCY_BUCKETS,
    percentileNote: "Percentiles are histogram bucket upper bounds; null means no samples or above 60s.",
  };
};

// ---- Queues
// Jobs mirror /api/admin/queues: BullMQ job.asJSON() with data, failedReason,
// stacktrace and returnvalue restored to their parsed values.

const QUEUES = [
  { key: "download", label: "Download", counts: { waiting: 12, active: 4, completed: 1840, failed: 7, delayed: 2 }, paused: false, workers: 2, concurrency: 4, completed24h: 1712, failed24h: 9 },
  { key: "remove", label: "Remove", counts: { waiting: 0, active: 1, completed: 310, failed: 0, delayed: 0 }, paused: false, workers: 1, concurrency: 1, completed24h: 44, failed24h: 0 },
  { key: "cache", label: "Cache cleanup", counts: { waiting: 230, active: 2, completed: 9120, failed: 41, delayed: 0 }, paused: true, workers: 0, concurrency: null, completed24h: 0, failed24h: 0 },
];
const job = (state, repoId, j) => {
  const ts = Date.now() - (j.ageMin || 1) * 60000;
  const out = {
    id: j.id || repoId,
    name: repoId,
    data: { repoId },
    opts: { attempts: 3, backoff: { type: "exponential", delay: 5000 }, removeOnComplete: 1000, removeOnFail: 1000 },
    progress: j.progress === undefined ? 0 : j.progress,
    attemptsMade: j.attemptsMade || 0,
    attemptsStarted: j.attemptsMade || 0,
    stalledCounter: 0,
    timestamp: ts,
    processedOn: state === "waiting" || state === "delayed" ? undefined : ts + 2000,
    finishedOn: state === "completed" || state === "failed" ? ts + 2000 + (j.durationMs || 4200) : undefined,
    failedReason: j.failedReason,
    stacktrace: j.stacktrace || [],
    returnvalue: state === "completed" ? null : undefined,
    _state: state,
  };
  if (state === "delayed") out.delayUntil = ts + 5 * 60000;
  return out;
};
const queueJobs = {
  download: [
    job("active", "fuzz-harness-7F21", { ageMin: 2, progress: { status: "get_files", percent: 42 } }),
    job("active", "llm-eval-suite", { ageMin: 0.5, progress: { status: "anonymize" } }),
    job("active", "runtime-repair-experiments-very-long-identifier-for-the-icse-artifact-track-2ff4", { ageMin: 9, progress: 87 }),
    job("waiting", "graph-mining-A91B", { ageMin: 1 }),
    job("waiting", "smart-contract-audit", { ageMin: 3 }),
    job("delayed", "dl-benchmark-2026", { ageMin: 4, attemptsMade: 1 }),
    job("failed", "b4751b8e-6139-4a94-84f8-646106435809", { ageMin: 50, attemptsMade: 3, durationMs: 31000,
      failedReason: "branch_not_found: the branch 'master' does not exist in noemail-user/thesis-code (GitHub returned 404 Not Found for GET /repos/noemail-user/thesis-code/branches/master)",
      stacktrace: [
        "AnonymousError: branch_not_found\n    at GitHubStream.getBranchCommit (/app/build/core/source/GitHubStream.js:212:19)\n    at async Repository.updateIfNeeded (/app/build/core/Repository.js:488:27)\n    at async Repository.anonymize (/app/build/core/Repository.js:531:9)\n    at async default (/app/build/queue/processes/downloadRepository.js:41:9)\n    at async Worker.processJob (/app/node_modules/bullmq/dist/cjs/classes/worker.js:463:28)",
        "AnonymousError: branch_not_found\n    at GitHubStream.getBranchCommit (/app/build/core/source/GitHubStream.js:212:19)",
      ] }),
    job("failed", "dl-benchmark-2026-retry", { ageMin: 300, attemptsMade: 1, failedReason: "repository_too_big" }),
    job("completed", "anonymous_github-C72C", { ageMin: 15, progress: { status: "ready", percent: 100 }, durationMs: 12800 }),
    job("completed", "JarSift", { ageMin: 120, durationMs: 640 }),
  ],
  remove: [
    job("active", "crypto-airdrop", { ageMin: 1 }),
    job("completed", "old-paper-artifact", { ageMin: 2000, durationMs: 230 }),
  ],
  cache: [],
};
const metricsPoints = (queue, range) => {
  const minutes = { "1h": 60, "6h": 360, "24h": 1440, "7d": 10080 }[range] || 60;
  const now = Math.floor(Date.now() / 60000) * 60000;
  const quiet = queue === "cache"; // paused queue: flat zero line
  return Array.from({ length: minutes }, (_, i) => {
    const t = now - (minutes - 1 - i) * 60000;
    const completed = quiet ? 0 : Math.max(0, Math.round(2 + 2 * Math.sin(i / 17) + (i % 37 === 0 ? 9 : 0)));
    const failed = quiet ? 0 : i % 53 === 0 ? 2 : 0;
    return { ts: t, completed, failed, avgMs: completed + failed ? 1800 + (i % 13) * 250 : 0 };
  });
};

// ---- Errors (logger ring entries: { ts, level, module, message, raw })

const errorEntries = [
  [0.02, "error", "streamer", "anonymous error", { name: "AnonymousError", message: "file_not_found", httpStatus: 500, detail: "dl-benchmark-2026", url: "/api/repo/dl-benchmark-2026/file/data/train/part-00031.parquet", cause: { name: "Error", message: "ENOENT: no such file or directory, open '/data/repos/dl-benchmark-2026/data/train/part-00031.parquet'", stack: "Error: ENOENT: no such file or directory, open '/data/repos/dl-benchmark-2026/data/train/part-00031.parquet'\n    at async open (node:internal/fs/promises:639:25)\n    at async FileSystem.read (/app/build/core/storage/FileSystem.js:58:22)\n    at async AnonymizedFile.content (/app/build/core/AnonymizedFile.js:301:24)" } }],
  [0.05, "warn", "github", "GitHub API rate limit low", { name: "HttpError", message: "API rate limit exceeded for installation ID 41234567.", status: 403, url: "https://api.github.com/repos/bob-lab/graph-mining/git/trees/c40da900ab12?recursive=1", method: "GET" }],
  [0.1, "error", "download", "anonymous error", { name: "AnonymousError", message: "repository_too_big", httpStatus: 500, detail: JSON.stringify({ repoId: "dl-benchmark-2026", size: 12241827840, limit: 8589934592, fullName: "alice-research/dl-benchmark" }) }],
  [0.3, "error", "streamer", "anonymous error", { name: "AnonymousError", message: "file_not_found", httpStatus: 500, detail: "dl-benchmark-2026", url: "/api/repo/dl-benchmark-2026/file/data/train/part-00032.parquet" }],
  [0.4, "error", "api", "unhandled error", { name: "TypeError", message: "Cannot read properties of undefined (reading 'repositoryName')", stack: "TypeError: Cannot read properties of undefined (reading 'repositoryName')\n    at Repository.toJSON (/app/build/core/Repository.js:1127:38)\n    at JSON.stringify (<anonymous>)\n    at ServerResponse.json (/app/node_modules/express/lib/response.js:263:14)\n    at /app/build/server/routes/admin.js:912:17\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)" }],
  [0.8, "warn", "api", "anonymous error", { name: "AnonymousError", message: "invalid_terms_format", httpStatus: 400, url: "/api/repo/new-paper/", method: "POST", detail: "Terms must be an array of non-empty strings; received a single string of 2,048 characters containing newlines, which usually means the terms were pasted into the wrong field." }],
  [1.5, "error", "streamer", "anonymous error", { name: "AnonymousError", message: "file_not_found", httpStatus: 500, detail: "dl-benchmark-2026", url: "/api/repo/dl-benchmark-2026/file/README.md" }],
  [2, "error", "queue", "job failed", { name: "AnonymousError", message: "branch_not_found", httpStatus: 404, detail: "b4751b8e-6139-4a94-84f8-646106435809" }],
  [3.4, "warn", "mongo", "slow query", { name: "MongoServerSelectionError", message: "Server selection timed out after 30000 ms", code: "ETIMEDOUT" }],
  [5, "error", "storage", "s3 put failed", { name: "S3ServiceException", message: "SlowDown: Please reduce your request rate.", status: 503, url: "https://s3.eu-west-1.amazonaws.com/anon-cache/repos/graph-mining-A91B/src/main.py" }],
  [6, "warn", "github", "GitHub API rate limit low", { name: "HttpError", message: "API rate limit exceeded for installation ID 41234567.", status: 403, url: "https://api.github.com/repos/bob-lab/fuzz-harness", method: "GET" }],
  [9, "error", "api", "anonymous error", { name: "AnonymousError", message: "repository_expired", httpStatus: 410, detail: "JarSift", url: "/api/repo/JarSift/files" }],
  [14, "warn", "streamer", "client aborted", { name: "Error", message: "aborted", code: "ECONNRESET", url: "/api/repo/runtime-repair-experiments-very-long-identifier-for-the-icse-artifact-track-2ff4/zip" }],
  [20, "error", "api", "unhandled error", { name: "RangeError", message: "Maximum call stack size exceeded", stack: "RangeError: Maximum call stack size exceeded\n    at anonymizeContent (/app/build/core/anonymize-utils.js:88:18)\n    at anonymizeContent (/app/build/core/anonymize-utils.js:102:16)\n    at anonymizeContent (/app/build/core/anonymize-utils.js:102:16)\n    at anonymizeContent (/app/build/core/anonymize-utils.js:102:16)" }],
  [23, "warn", "conference", "billing webhook", { message: "Stripe webhook signature mismatch for event evt_1Q2w3E4r5T6y7U8i (conference ICSE26-AE)" }],
  [23.5, "error", "streamer", "anonymous error", { name: "AnonymousError", message: "file_not_found", httpStatus: 500, detail: "graph-mining-A91B", url: "/api/repo/graph-mining-A91B/file/docs/very/deeply/nested/folder/structure/that/keeps/going/and/going/index.html" }],
].map(([hoursAgo, level, module, message, detail]) => ({
  ts: new Date(Date.now() - hoursAgo * HOUR).toISOString(),
  level,
  module,
  message,
  raw: [message, detail],
}));
const errorStats = (() => {
  const hourNow = Math.floor(Date.now() / HOUR) * HOUR;
  const buckets = Array.from({ length: 24 }, (_, i) => {
    const spike = i === 20 ? 6 : 1; // an incident a few hours ago
    return { hour: hourNow - (23 - i) * HOUR + HOUR, error: Math.round((1 + (i % 4)) * spike), warn: 3 + (i % 6), info: i % 3 === 0 ? 0 : 8 + (i % 5) };
  });
  const severity = { error: 0, warn: 0, info: 0 };
  buckets.forEach((b) => { severity.error += b.error; severity.warn += b.warn; severity.info += b.info; });
  const last24h = severity.error + severity.warn + severity.info;
  return { available: true, last24h, prev24h: Math.round(last24h * 0.74), severity, unique: { error: 7, warn: 4, info: 3 }, buckets, dropped: 12 };
})();

const adminTokens = [
  { id: oid(700), name: "ci-deploy", createdAt: ago(200), lastUsedAt: ago(0.01) },
  { id: oid(701), name: "local laptop (never used)", createdAt: ago(3) },
];

const ok = (req, res) => res.json({ ok: true });
app.get("/api/admin/overview", (req, res) => res.json(overview));
app.get("/api/admin/performance", (req, res) => res.json(performanceFor(Number(req.query.minutes))));
// Shape of GET /api/admin/cache (cacheMetricsReport + blob-cache stats()).
const CACHE_BUCKETS = [0.1, 1, 10, 100, 1000, 10000];
const cacheRow = (name, traffic, count, bytes, msEach, bucket) => {
  const row = { name, traffic, count, bytes, ms: msEach * count };
  for (let i = 0; i <= CACHE_BUCKETS.length; i++) row["b" + i] = i === bucket ? Math.ceil(count * 0.9) : i === bucket + 1 ? Math.floor(count * 0.1) : 0;
  return row;
};
const cacheFor = (minutes) => {
  const k = ({ 15: 0.25, 60: 1, 1440: 18, 10080: 110 })[minutes] || 1;
  const n = (v) => Math.max(1, Math.round(v * k));
  return {
    available: true, windowMinutes: [15, 60, 1440, 10080].includes(minutes) ? minutes : 60, sampledAt: Date.now() - 6000, lastFlush: Date.now() - 6000, dropped: 0,
    enabled: true, filesystemSupported: true, latencyBucketsMs: CACHE_BUCKETS,
    source: { blobs: 18240, originalBytes: 61.2 * 1024 * MB, storedBytes: 19.4 * 1024 * MB, allocatedBytes: 21.7 * 1024 * MB, activeReaders: 14, decisions: 0, reservedBytes: 96 * MB, budgetBytes: 50 * 1024 * MB, maxObjectBytes: 32 * MB, oldestAccess: Date.now() - 21 * DAY },
    results: { blobs: 5210, originalBytes: 3.1 * 1024 * MB, storedBytes: 0.9 * 1024 * MB, allocatedBytes: 1.1 * 1024 * MB, activeReaders: 3, decisions: 40211, reservedBytes: 0, budgetBytes: 512 * MB, maxObjectBytes: 32 * MB, oldestAccess: Date.now() - 9 * DAY },
    rows: [
      cacheRow("compress", "file", n(210), n(210) * 48000, 7.8, 2),
      cacheRow("decision_hit", "file", n(8120), n(8120) * 62000, 0, 0),
      cacheRow("decision_miss", "file", n(640), n(640) * 54000, 0, 0),
      cacheRow("decompress", "file", n(7930), n(7930) * 61000, 0.31, 1),
      cacheRow("inspected_changed", "file", n(410), n(410) * 22000, 3.4, 2),
      cacheRow("inspected_unchanged", "file", n(230), n(230) * 18000, 1.1, 2),
      cacheRow("rewrite_changed", "file", n(410), n(410) * 22000, 47.9, 3),
      cacheRow("source_hit", "file", n(7710), n(7710) * 64000, 0, 0),
      cacheRow("source_miss", "file", n(1050), n(1050) * 71000, 0, 0),
      cacheRow("source_hit", "website", n(1320), n(1320) * 12000, 0, 0),
      cacheRow("source_miss", "website", n(88), n(88) * 15000, 0, 0),
      cacheRow("source_hit", "zip", n(36), n(36) * 4.1 * MB, 0, 0),
      cacheRow("source_bypass", "monitor", n(540), 0, 0, 0),
      cacheRow("result_fill", "background", n(120), n(120) * 21000, 12.5, 2),
    ],
  };
};
app.get("/api/admin/cache", (req, res) => res.json(cacheFor(Number(req.query.minutes))));
app.get("/api/admin/stats", (req, res) => res.json({
  statusBreakdown: overview.repos.statusBreakdown, totalStorage: overview.repos.totalStorage,
  recentErrors24h: overview.repos.recentErrors24h, totalUsers: overview.users.total, totalConferences: adminConferences.length,
}));
app.get("/api/admin/repos", (req, res) => {
  let rows = adminRepos;
  if (req.query.owner) {
    const u = adminUsers.find((x) => x.username === req.query.owner);
    rows = u ? rows.filter((r) => r.owner === u._id) : [];
  }
  if (req.query.conference) rows = rows.filter((r) => r.conference === req.query.conference);
  res.json(page(req, rows, true));
});
app.get("/api/admin/repos/:repoId/github", (req, res) => {
  const r = adminRepos.find((x) => x.repoId === req.params.repoId) || adminRepos[0];
  const [owner, repo] = r.source.repositoryName.split("/");
  res.json({
    source: { owner, repo, branch: r.source.branch, commit: r.source.commit },
    repository: { fullName: r.source.repositoryName, private: true, archived: false, disabled: false, defaultBranch: "main", description: "Replication package", stargazers: 3, watchers: 3, forks: 0, openIssues: 1, size: 48213, language: "Python", license: "MIT", createdAt: ago(400), updatedAt: ago(2), pushedAt: ago(2), htmlUrl: "https://github.com/" + r.source.repositoryName, topics: [] },
    branchError: r.status === "error" ? "Branch not found" : undefined,
    rateLimit: { remaining: 4123, limit: 5000, reset: ahead(0.03) },
  });
});
app.delete("/api/admin/repos/:repoId", (req, res) => res.json({ status: "ready" }));
app.get("/api/admin/users", (req, res) => {
  const rows = adminUsers.map((u) => {
    const { repositories, ...rest } = u;
    return Object.assign(rest, { repositories, repoCount: repositories.length });
  });
  res.json(page(req, rows, false));
});
app.get("/api/admin/users/:username/repos", (req, res) => {
  const u = adminUsers.find((x) => x.username === req.params.username);
  if (!u) return res.status(404).json({ error: "user_not_found" });
  res.json(adminRepos.filter((r) => r.owner === u._id).map(repoView));
});
app.get("/api/admin/users/:username", (req, res) => {
  const u = adminUsers.find((x) => x.username === req.params.username);
  if (!u) return res.status(404).json({ error: "user_not_found" });
  res.json(Object.assign({}, u, { repositories: githubRepos(u) }));
});
app.post("/api/admin/users/:username/ban", (req, res) => res.json({ ok: true, reposQueued: 2 }));
app.post("/api/admin/users/:username/:action", ok);
app.get("/api/user/:username/all_repositories", (req, res) => {
  const u = adminUsers.find((x) => x.username === req.params.username) || adminUsers[0];
  res.json(githubRepos(u));
});
app.get("/api/admin/tokens", (req, res) => res.json(adminTokens));
app.post("/api/admin/tokens", (req, res) => res.json({ id: oid(799), name: "new token", createdAt: new Date().toISOString(), token: "agh_mock_0123456789abcdef0123456789abcdef" }));
app.delete("/api/admin/tokens/:id", (req, res) => res.json({ removed: 1 }));
app.get("/api/admin/conferences", (req, res) => res.json(page(req, adminConferences, false)));
app.delete("/api/admin/conferences/:id", ok);
app.get("/api/admin/queues/metrics", (req, res) => {
  const queue = String(req.query.queue || "download");
  const range = String(req.query.range || "1h");
  res.json({ queue, range, points: metricsPoints(queue, range) });
});
app.get("/api/admin/queues", (req, res) => {
  const selected = QUEUES.some((q) => q.key === req.query.queue) ? req.query.queue : "download";
  const search = String(req.query.search || "").toLowerCase();
  const jobs = queueJobs[selected].filter((j) => !search || j.id.toLowerCase().includes(search) || j.name.toLowerCase().includes(search));
  res.json({ queues: QUEUES, selectedQueue: selected, jobs });
});
app.post("/api/admin/queues/pause-all", ok);
app.post("/api/admin/queue/:name/retry-failed", (req, res) => res.json({ retried: 2, total: 2 }));
app.post("/api/admin/queue/:name/:action", ok);
app.delete("/api/admin/queue/:name/:id", ok);
app.get("/api/admin/errors", (req, res) => {
  const offset = Math.max(0, parseInt(req.query.offset, 10) || 0);
  const limit = Math.min(5000, Math.max(1, parseInt(req.query.limit, 10) || 250));
  res.json({ entries: errorEntries.slice(offset, offset + limit), offset, limit, total: errorEntries.length, max: 5000, available: true });
});
app.get("/api/admin/errors/stats", (req, res) => res.json(errorStats));
app.delete("/api/admin/errors", (req, res) => res.json({ ok: true, cleared: errorEntries.length, hourlyCleared: 48 }));

// ---- Admin billing (/api/admin/billing/*) --------------------------------
// Grants as stored in Mongo (BillingGrant), summarized the way
// src/core/billing/report.ts does: a paper pack's three grants are one sale,
// revenue is the Stripe list price per currency (minor units).
// Cookies: mock_billing_empty=1 (no sales), mock_billing_norevenue=1 (Stripe
// not configured), mock_billing_slow=1 (summary never answers: loading state).
const BILLING_PLANS = [
  ["author_monthly", "Author monthly", "subscription"], ["author_annual", "Author annual", "subscription"],
  ["author_pass", "Live updates", "repository"], ["repo_extend", "Extended expiration", "repository"], ["repo_never", "Never expire", "repository"],
  ["repo_slot", "Extra repository", "repository"], ["repo_pack", "Paper pack", "repository"],
  ["conference_workshop", "Workshop", "conference"], ["conference", "Conference", "conference"], ["conference_large", "Large conference", "conference"],
];
const BILLING_PRICES = {
  author_monthly: { eur: 500, interval: "month" }, author_annual: { eur: 4800, interval: "year" }, author_pass: { eur: 400 },
  repo_extend: { eur: 300 }, repo_never: { eur: 1500 }, repo_slot: { eur: 300 }, repo_pack: { eur: 800 },
  conference_workshop: { eur: 9900 }, conference: { eur: 29900 }, conference_large: { usd: 64900 }, // a price in another currency stays apart
};
const NEVER = "9999-12-31T00:00:00.000Z";
const billingGrants = (() => {
  // Deterministic pseudo-random sales over 14 months, denser recently.
  let seed = 7;
  const rand = () => { seed = (seed * 16807) % 2147483647; return seed / 2147483647; };
  const owners = adminUsers.filter((u) => u.status === "active");
  const repos = ["anonymous_github-C72C", "icse24-artifact-7B1D", "JarSift", "runtime-repair-experiments-very-long-identifier-2ff4", "replication-package-5E1A"];
  const out = [];
  const weights = [["author_monthly", 14], ["author_annual", 6], ["author_pass", 10], ["repo_extend", 8], ["repo_never", 6], ["repo_slot", 7], ["repo_pack", 9], ["conference_workshop", 2], ["conference", 2], ["conference_large", 1]];
  const total = weights.reduce((n, [, w]) => n + w, 0);
  const pick = () => { let r = rand() * total; for (const [id, w] of weights) { if ((r -= w) < 0) return id; } return "repo_slot"; };
  for (let i = 0; i < 150; i++) {
    const days = Math.floor(Math.pow(rand(), 1.6) * 420);
    const plan = pick(), owner = owners[Math.floor(rand() * owners.length)];
    const purchasedAt = ago(days + rand());
    const base = { owner: owner._id, purchasedAt, status: "paid", revoked: false, cancelAtPeriodEnd: false };
    const id = (rand().toString(36).slice(2, 10));
    if (plan.startsWith("author_") && plan !== "author_pass") {
      const period = plan === "author_annual" ? 365 : 30;
      const ended = rand() < 0.25 && days > 40;
      const until = ended ? ago(Math.max(1, days - period * 2)) : ahead(period - (days % period) || 1);
      out.push({ ...base, _id: "sub_" + id, scope: "user:" + owner._id, planId: plan, subscription: true, status: ended ? "canceled" : rand() < 0.06 ? "past_due" : "active", until, cancelAtPeriodEnd: !ended && rand() < 0.18 });
    } else if (plan === "repo_pack") {
      const repo = repos[Math.floor(rand() * repos.length)];
      for (const part of ["repo_slot", "author_pass", "repo_extend"]) out.push({ ...base, _id: "cs_" + id + ":" + part, scope: "repo:" + repo, planId: part, pack: true, until: part === "repo_slot" ? NEVER : ago(days - (part === "author_pass" ? 180 : 365)) });
    } else if (plan.startsWith("conference")) {
      out.push({ ...base, _id: "cs_" + id, scope: "conference:" + ["FSE25", "ICSE26-AE", "FSE23"][Math.floor(rand() * 3)], planId: plan, until: ago(days - 160) });
    } else {
      const length = { author_pass: 180, repo_extend: 365 }[plan];
      out.push({ ...base, _id: "cs_" + id, scope: "repo:" + repos[Math.floor(rand() * repos.length)], planId: plan, until: length ? ago(days - length) : NEVER });
    }
  }
  // Reversals: a recent refund, an older dispute.
  const oneOffs = out.filter((g) => g._id.startsWith("cs_") && !g.pack);
  Object.assign(oneOffs[2], { revoked: true, revocationReason: "full_refund", revokedAt: ago(3) });
  Object.assign(oneOffs[9], { revoked: true, revocationReason: "dispute", revokedAt: ago(40) });
  Object.assign(oneOffs[14], { revoked: true, revocationReason: "full_refund", revokedAt: ago(12) });
  return out.sort((a, b) => b.purchasedAt.localeCompare(a.purchasedAt));
})();
const billingUsable = (g, now) => !g.revoked && g.until > now && ["active", "paid", "past_due"].includes(g.status);
const billingFamily = (planId) => (BILLING_PLANS.find((p) => p[0] === planId) || [])[2] || "repository";
function billingSales(grants) {
  const sales = new Map();
  for (const g of grants) {
    const key = g.pack ? g._id.split(":")[0] : g._id;
    const sale = sales.get(key) || { plan: g.pack ? "repo_pack" : g.planId, purchasedAt: g.purchasedAt, revoked: false, active: false, cancel: false };
    const now = new Date().toISOString();
    sale.revoked = sale.revoked || g.revoked; sale.reason = sale.reason || g.revocationReason; sale.revokedAt = sale.revokedAt || g.revokedAt;
    sale.active = sale.active || billingUsable(g, now); sale.cancel = sale.cancel || g.cancelAtPeriodEnd;
    sales.set(key, sale);
  }
  return [...sales.values()];
}
function billingSummary(req) {
  const cookie = req.headers.cookie || "";
  const empty = /mock_billing_empty=1/.test(cookie), revenue = !/mock_billing_norevenue=1/.test(cookie);
  const period = ["7d", "30d", "90d", "12m", "all"].includes(req.query.period) ? req.query.period : "30d";
  const days = { "7d": 7, "30d": 30, "90d": 90, "12m": 365 }[period];
  const now = new Date(), since = days ? new Date(now - days * DAY) : null;
  const sales = empty ? [] : billingSales(billingGrants);
  const inPeriod = (date) => date && (!since || new Date(date) >= since);
  const money = (list, fn = () => 1) => { if (!revenue) return {}; const m = {}; for (const s of list) { const [currency, amount] = Object.entries(BILLING_PRICES[s.plan]).find(([k]) => k !== "interval"); m[currency] = Math.round((m[currency] || 0) + amount * fn(s)); } return m; };
  const subs = sales.filter((s) => s.active && billingFamily(s.plan) === "subscription");
  const reversals = sales.filter((s) => s.revoked && inPeriod(s.revokedAt));
  const unit = period === "12m" ? "week" : period === "all" ? "month" : "day";
  const trunc = (d) => { const x = new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth(), unit === "month" ? 1 : d.getUTCDate())); if (unit === "week") x.setUTCDate(x.getUTCDate() - ((x.getUTCDay() + 6) % 7)); return x; };
  const next = (d) => { const x = new Date(d); if (unit === "month") x.setUTCMonth(x.getUTCMonth() + 1); else x.setUTCDate(x.getUTCDate() + (unit === "week" ? 7 : 1)); return x; };
  const first = since || (sales.length ? new Date(sales.reduce((m, s) => s.purchasedAt < m ? s.purchasedAt : m, sales[0].purchasedAt)) : null);
  const series = [];
  if (first) {
    const buckets = new Map();
    for (let d = trunc(first); d <= now; d = next(d)) { const b = { date: d.toISOString(), subscription: 0, repository: 0, conference: 0 }; buckets.set(d.getTime(), b); series.push(b); }
    for (const s of sales) if (inPeriod(s.purchasedAt)) { const b = buckets.get(trunc(new Date(s.purchasedAt)).getTime()); if (b) b[billingFamily(s.plan)]++; }
  }
  const periodSales = sales.filter((s) => inPeriod(s.purchasedAt));
  return {
    period, since, now, bucket: unit,
    subscriptions: { active: subs.length, monthly: subs.filter((s) => s.plan === "author_monthly").length, annual: subs.filter((s) => s.plan === "author_annual").length,
      cancelling: subs.filter((s) => s.cancel).length, mrr: money(subs, (s) => s.plan === "author_annual" ? 1 / 12 : 1) },
    sales: { count: periodSales.length, revenue: money(periodSales) },
    allTime: { count: sales.length, revenue: money(sales) },
    reversals: { refunds: reversals.filter((s) => s.reason !== "dispute").length, disputes: reversals.filter((s) => s.reason === "dispute").length, amount: money(reversals) },
    plans: BILLING_PLANS.map(([planId, name, family]) => {
      const of = (list) => list.filter((s) => s.plan === planId);
      return { planId, name, family, active: of(sales.filter((s) => s.active)).length, sales: of(periodSales).length, revenue: money(of(periodSales)), allTimeSales: of(sales).length, allTimeRevenue: money(of(sales)) };
    }),
    series,
    revenue: { available: revenue, reason: revenue ? null : "stripe_not_configured", missingSales: 0, basis: "list_price" },
    webhooks: empty
      ? { pending: 0, failed: 0, oldestPendingSeconds: 0, unresolved: 0, reconciliationFailed: 0, lastError: null, unreviewedRevocations: 0, latestRevocation: null }
      : { pending: 2, failed: 1, oldestPendingSeconds: 140, unresolved: 0, reconciliationFailed: 0, unreviewedRevocations: 1, latestRevocation: { reason: "full_refund", createdAt: ago(3) },
        lastError: { type: "invoice.paid", state: "failed", error: "api_error:rate_limit", attempts: 12, receivedAt: ago(0.2) } },
  };
}
app.get("/api/admin/billing/summary", (req, res) => {
  if (/mock_billing_slow=1/.test(req.headers.cookie || "")) return; // never answers
  res.json(billingSummary(req));
});
app.get("/api/admin/billing/grants", (req, res) => {
  const now = new Date().toISOString();
  const word = (v) => typeof v === "string" && /^[a-z_]{1,40}$/.test(v) ? v : "";
  const plan = word(req.query.plan), status = word(req.query.status), state = word(req.query.state);
  const search = String(req.query.search || "").toLowerCase();
  const name = (g) => (adminUsers.find((u) => u._id === g.owner) || {}).username;
  const stateOf = (g) => g.revoked ? "revoked" : billingUsable(g, now) ? "active" : "expired";
  let rows = /mock_billing_empty=1/.test(req.headers.cookie || "") ? [] : billingGrants;
  rows = rows.filter((g) => (!plan || (plan === "repo_pack" ? g.pack : g.planId === plan)) && (!status || g.status === status) && (!search || (name(g) || "").toLowerCase().includes(search)));
  const stateCounts = { active: 0, expired: 0, revoked: 0 };
  for (const g of rows) stateCounts[stateOf(g)]++;
  if (state) rows = rows.filter((g) => stateOf(g) === state);
  const field = req.query.sort === "until" ? "until" : "purchasedAt", dir = req.query.direction === "asc" ? 1 : -1;
  rows = [...rows].sort((a, b) => dir * a[field].localeCompare(b[field]));
  const pageNo = Math.max(1, parseInt(req.query.page, 10) || 1), limit = Math.min(100, parseInt(req.query.limit, 10) || 25);
  const results = rows.slice((pageNo - 1) * limit, pageNo * limit).map((g) => {
    const [kind, id] = g.scope.split(/:(.*)/s);
    return { id: g._id.replace(/[^a-z0-9]/gi, "").slice(-12), user: name(g) || null, planId: g.planId, pack: !!g.pack, family: billingFamily(g.planId), subscription: !!g.subscription,
      status: g.status, state: stateOf(g), purchasedAt: g.purchasedAt, until: g.until === NEVER ? null : g.until, never: g.until === NEVER,
      cancelAtPeriodEnd: g.cancelAtPeriodEnd, revoked: g.revoked, revocationReason: g.revocationReason || null, revokedAt: g.revokedAt || null,
      scope: kind === "repo" || kind === "conference" ? { kind, id } : { kind: "account", id: null } };
  });
  res.json({ page: pageNo, limit, total: rows.length, results, stateCounts, statuses: [...new Set(billingGrants.map((g) => g.status))].sort() });
});

app.all("/api/{*rest}", (req, res) => res.status(404).json({ error: "not mocked: " + req.path }));

app.use((req, res, next) => {
  res.setHeader("Cache-Control", "no-store, max-age=0");
  next();
});
// index: false so "/" falls through to the placeholder-filled index.html below.
app.use(express.static(PUBLIC_DIR, { etag: false, cacheControl: false, index: false }));
// Like src/server/index.ts: a README's relative image (/r/<id>/figures/x.png,
// requested without text/html) redirects to the file endpoint.
app.get("/r/:repoId/{*rest}", (req, res, next) => {
  if ((req.headers.accept || "").includes("text/html")) return next();
  res.redirect(`/api/repo/${req.params.repoId}/file/${req.params.rest.join("/")}`);
});
app.get("/{*rest}", (req, res) => res.type("html").send(indexHtml()));

app.listen(PORT, () => {
  console.log(`mock ui  http://localhost:${PORT}/dashboard`);
});