course-login/index.html at main · ldilab/course-login · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Course Login</title>

    <script src="https://accounts.google.com/gsi/client" async defer></script>

    <style>
      body {
        font-family: Arial, sans-serif;
        max-width: 680px;
        margin: 60px auto;
        padding: 0 20px;
        color: #222;
      }

      .card {
        border: 1px solid #ddd;
        border-radius: 12px;
        padding: 24px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
      }

      .error {
        border-color: #e5b2b2;
        background: #fff6f6;
      }

      h1 {
        margin-top: 0;
        font-size: 28px;
      }

      .muted {
        color: #666;
      }

      code {
        background: #f5f5f5;
        padding: 2px 5px;
        border-radius: 4px;
      }

      .course-list {
        margin-top: 16px;
        padding-left: 20px;
      }

      #googleSignInButton {
        margin-top: 18px;
      }
    </style>
  </head>

  <body>
    <div class="card" id="app">
      <h1>Course Login</h1>
      <p class="muted">Loading...</p>
    </div>

    <script>
      const GOOGLE_CLIENT_ID = '934616809748-lf1o5mrqq34c3vefb8mhlup2nbghi743.apps.googleusercontent.com';

      const COURSE_CONFIGS = {
        'samsung-ds-2026': {
          title: 'Samsung Electronics DS Course',
          description: 'Sign in with the Google account registered for the Samsung Electronics DS course.',
          appsScriptUrl: 'https://script.google.com/macros/s/AKfycby9EA8ECBtCH8lW78SC8lDVPLPdxSbeKdcIJSElfgh3ZQ0fqF0J23T479g-icfhWQuo/exec',
        },

        'sct-2026-spring': {
          title: '삼성물산(건설부문)--서울대 AI/Data 심화과정',
          description: 'Sign in with a Google account to access the course page. First-time users will be asked to identify themselves by name and team number.',
          appsScriptUrl: 'https://script.google.com/macros/s/AKfycbzh0WKDRYex8glKqjVSKclxr1IBe3AXtzNpv5wz9Nmu7SbgtUy_7T_SnzY6ATHRb6Tc/exec',
        },
      };

      function escapeHtml(value) {
        return String(value ?? '')
          .replaceAll('&', '&amp;')
          .replaceAll('<', '&lt;')
          .replaceAll('>', '&gt;')
          .replaceAll('"', '&quot;')
          .replaceAll("'", '&#039;');
      }

      function getCourseKey() {
        const params = new URLSearchParams(window.location.search);
        return params.get('course') || '';
      }

      function getCourseConfig() {
        const courseKey = getCourseKey();
        return COURSE_CONFIGS[courseKey] || null;
      }

      function renderError(message) {
        document.getElementById('app').className = 'card error';
        document.getElementById('app').innerHTML = `
          <h1>Course Login</h1>
          <p>${escapeHtml(message || 'Invalid course link.')}</p>
          <p class="muted">
            Please use the course link provided by the instructor.
          </p>
        `;
      }

      function renderUnknownCourse(courseKey) {
        renderError('Invalid course link.');
      }

      function renderLoginPage() {
        const courseKey = getCourseKey();
        const course = getCourseConfig();

        if (!course) {
          renderUnknownCourse(courseKey);
          return;
        }

        if (
          !GOOGLE_CLIENT_ID ||
          GOOGLE_CLIENT_ID === 'PASTE_YOUR_GOOGLE_CLIENT_ID_HERE'
        ) {
          renderError('GOOGLE_CLIENT_ID is not configured.');
          return;
        }

        if (
          !course.appsScriptUrl ||
          course.appsScriptUrl.startsWith('PASTE_')
        ) {
          renderError(`Apps Script URL is not configured for course: ${courseKey}`);
          return;
        }

        document.title = course.title;

        document.getElementById('app').className = 'card';
        document.getElementById('app').innerHTML = `
          <h1>${escapeHtml(course.title)}</h1>
          <p>${escapeHtml(course.description)}</p>
          <p class="muted">
            After sign-in, you will be redirected to the course viewer.
          </p>

          <div id="googleSignInButton"></div>

          <p class="muted">
            If you have multiple Google accounts, choose the one listed in the course roster.
          </p>
        `;

        initializeGoogleSignIn();
      }

      function initializeGoogleSignIn() {
        if (!window.google || !google.accounts || !google.accounts.id) {
          setTimeout(initializeGoogleSignIn, 100);
          return;
        }

        google.accounts.id.initialize({
          client_id: GOOGLE_CLIENT_ID,
          callback: handleCredentialResponse,
        });

        google.accounts.id.renderButton(
          document.getElementById('googleSignInButton'),
          {
            type: 'standard',
            theme: 'outline',
            size: 'large',
            text: 'signin_with',
            shape: 'rectangular',
            logo_alignment: 'left',
          }
        );
      }

      function handleCredentialResponse(response) {
        const courseKey = getCourseKey();
        const course = getCourseConfig();

        if (!course) {
          renderUnknownCourse(courseKey);
          return;
        }

        if (!response || !response.credential) {
          renderError('Google sign-in did not return a credential.');
          return;
        }

        document.getElementById('app').innerHTML = `
          <h1>${escapeHtml(course.title)}</h1>
          <p>Signing in...</p>
        `;

        const form = document.createElement('form');
        form.method = 'POST';
        form.action = course.appsScriptUrl;

        const tokenInput = document.createElement('input');
        tokenInput.type = 'hidden';
        tokenInput.name = 'idToken';
        tokenInput.value = response.credential;

        const courseInput = document.createElement('input');
        courseInput.type = 'hidden';
        courseInput.name = 'course';
        courseInput.value = courseKey;

        form.appendChild(tokenInput);
        form.appendChild(courseInput);
        document.body.appendChild(form);
        form.submit();
      }

      window.onload = renderLoginPage;
    </script>
  </body>
</html>