tods-validate/web/index.html at migrate-dev-deps-pep735 · ghzhost/tods-validate · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <!--
      Content-Security-Policy: restricts network access to the two origins
      the playground actually needs: cdn.jsdelivr.net (Pyodide runtime, wasm,
      and its bundled packages) and files.pythonhosted.org / pypi.org
      (micropip fetching the tods-validate wheel and its metadata).
      'wasm-unsafe-eval' is required for Pyodide's WebAssembly execution;
      'unsafe-inline' is required for the inline <script> and <style> below.
    -->
    <meta
      http-equiv="Content-Security-Policy"
      content="default-src 'none'; script-src 'self' 'unsafe-inline' 'wasm-unsafe-eval' https://cdn.jsdelivr.net; style-src 'self' 'unsafe-inline'; connect-src https://cdn.jsdelivr.net https://files.pythonhosted.org https://pypi.org; img-src 'self' data:; frame-src 'self'; worker-src blob:; child-src blob:;"
    />
    <title>tods-validate playground</title>
    <style>
      :root {
        color-scheme: light dark;
        --background: #ffffff;
        --foreground: #111827;
        --muted: #4b5563;
        --border: #9ca3af;
      }
      @media (prefers-color-scheme: dark) {
        :root {
          --background: #111827;
          --foreground: #f9fafb;
          --muted: #d1d5db;
          --border: #6b7280;
        }
      }
      body {
        font: 16px/1.5 system-ui, sans-serif;
        max-width: 56rem;
        margin: 2rem auto;
        padding: 0 1rem;
        color: var(--foreground);
        background: var(--background);
      }
      h1 { margin-bottom: 0.25rem; }
      .lede { color: var(--muted); margin-top: 0; }
      .panel {
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 1rem;
        margin: 1rem 0;
      }
      button {
        font: inherit;
        padding: 0.5rem 1rem;
        border-radius: 6px;
        border: 1px solid #888;
        cursor: pointer;
      }
      button:disabled { opacity: 0.65; cursor: progress; }
      :focus-visible { outline: 3px solid currentColor; outline-offset: 3px; }
      #status { color: var(--muted); }
      iframe#report {
        width: 100%;
        min-height: 24rem;
        border: 1px solid var(--border);
        border-radius: 8px;
        margin-top: 1rem;
      }
      code { background: rgba(127, 127, 127, 0.15); padding: 0 0.25rem; border-radius: 3px; }
    </style>
  </head>
  <body>
    <main>
      <h1>tods-validate playground</h1>
      <p class="lede">
        Validate a Transit Operational Data Standard (TODS) feed in your browser.
        Nothing is uploaded: the validator runs entirely on your machine via
        Pyodide (WebAssembly), so it is safe for non-public operational data.
      </p>

      <div class="panel">
        <p id="files-help">
        Choose your TODS <code>.txt</code> files, and the companion GTFS files if
        you have them (select them all together):
        </p>
        <label for="files"><strong>Feed files</strong></label>
        <input type="file" id="files" aria-describedby="files-help" multiple />
        <button id="run" disabled>Validate</button>
        <p id="status" role="status">Loading Python (this takes a few seconds the first time)…</p>
      </div>

      <h2 id="report-heading" tabindex="-1">Validation report</h2>
      <iframe
        id="report"
        title="Validation report"
        sandbox="allow-same-origin"
        srcdoc="<p>Validation results will appear here after you select feed files.</p>"
      ></iframe>
    </main>

    <footer>
      <p id="footer-version"></p>
      <p>
        <a href="https://ko-fi.com/T6T6GMYTU" target="_blank" rel="noopener noreferrer"
          >Support this work on Ko-fi</a
        >
      </p>
    </footer>

    <!-- Pyodide runtime. Update the version to the current Pyodide release,
         and regenerate the integrity hash to match (SEC-20 / A11Y-17 note in
         the standards audit): `curl -sSL <url> | openssl dgst -sha384 -binary
         | openssl base64 -A`, prefixed with `sha384-`. -->
    <script
      src="https://cdn.jsdelivr.net/pyodide/v0.26.4/full/pyodide.js"
      integrity="sha384-i3R37b3tF+HWudsUf1VSEOY2YxwSNMqY8DQa9Z0O3xh+NkJ9o+yjcGyIi5huj+nB"
      crossorigin="anonymous"
    ></script>
    <script>
      // Keep in sync with the pinned wheel version below and the Pyodide
      // <script> tag's src/integrity above when bumping either.
      const TODS_VALIDATE_VERSION = "0.10.0";
      const PYODIDE_VERSION = "v0.26.4";

      const status = document.getElementById("status");
      const runBtn = document.getElementById("run");
      const filesInput = document.getElementById("files");
      const report = document.getElementById("report");
      const reportHeading = document.getElementById("report-heading");
      const footerVersion = document.getElementById("footer-version");
      const selected = new Map(); // filename -> Uint8Array
      let pyodide;

      footerVersion.textContent = `tods-validate ${TODS_VALIDATE_VERSION} · Pyodide ${PYODIDE_VERSION}`;

      async function boot() {
        pyodide = await loadPyodide();
        await pyodide.loadPackage("micropip");
        const micropip = pyodide.pyimport("micropip");
        await micropip.install(`tods-validate==${TODS_VALIDATE_VERSION}`);
        status.textContent = `Ready — validating with tods-validate ${TODS_VALIDATE_VERSION} on Pyodide ${PYODIDE_VERSION}. Choose your feed files, then click Validate.`;
        runBtn.disabled = false;
      }

      filesInput.addEventListener("change", async (event) => {
        selected.clear();
        for (const file of event.target.files) {
          selected.set(file.name, new Uint8Array(await file.arrayBuffer()));
        }
        status.textContent = `${selected.size} file(s) selected.`;
      });

      runBtn.addEventListener("click", async () => {
        if (selected.size === 0) {
          status.textContent = "Select your feed files first.";
          return;
        }
        status.textContent = "Validating…";
        try {
          pyodide.FS.mkdir("/feed");
        } catch (_) {
          /* already exists from a previous run */
        }
        for (const [name, bytes] of selected) {
          pyodide.FS.writeFile("/feed/" + name, bytes);
        }
        try {
          const html = await pyodide.runPythonAsync(`
from tods_validate.api import validate_feed
from tods_validate.report import render_html
result = validate_feed("/feed")
render_html(result.findings, "your feed")
`);
          report.srcdoc = html;
          status.textContent = "Done.";
          // Move focus to the report heading so keyboard/screen-reader users
          // are taken to the newly rendered report.
          reportHeading.focus();
        } catch (err) {
          status.textContent = "Validation error: " + err;
        } finally {
          for (const name of selected.keys()) {
            try {
              pyodide.FS.unlink("/feed/" + name);
            } catch (_) {
              /* ignore */
            }
          }
        }
      });

      if (new URLSearchParams(window.location.search).has("a11y-static")) {
        status.textContent = "Static accessibility audit mode.";
      } else {
        boot().catch((err) => {
          status.textContent = "Failed to load Python: " + err;
        });
      }
    </script>
  </body>
</html>