Module: LinkIO::SmartRedirect

Defined in:
lib/linkio/smart_redirect.rb

Overview

Generates the HTML page that attempts to open the native app via its custom scheme and falls back to the app store after a timeout. This is a faithful port of the Node.js backend's generateSmartRedirectPage.

Class Method Summary collapse

Class Method Details

.page(app_scheme:, params:, store_url:, platform:, package_name:, timeout:) ⇒ String

Returns a complete HTML document.

Parameters:

  • app_scheme (String) —

    e.g. "rokart"

  • params (Hash) —

    parameters forwarded to the app link

  • store_url (String) —

    fallback store URL

  • platform (String) —

    Platform value

  • package_name (String) —

    Android package name (for the intent:// fallback)

  • timeout (Integer) —

    ms before falling back to the store

Returns:

  • (String) —

    a complete HTML document



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# File 'lib/linkio/smart_redirect.rb', line 17

def page(app_scheme:, params:, store_url:, platform:, package_name:, timeout:)
  query_string = Utils.encode_query(params)
  app_uri = "#{app_scheme}://link#{"?#{query_string}" unless query_string.empty?}"

  android_intent =
    if platform == Platform::ANDROID
      "intent://link#{"?#{query_string}" unless query_string.empty?}" \
        "#Intent;scheme=#{app_scheme};package=#{package_name};end"
    else
      ""
    end

  is_android = platform == Platform::ANDROID

  <<~HTML
    <!DOCTYPE html>
    <html>
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <title>Opening App...</title>
      <style>
        body {
          font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
          display: flex;
          justify-content: center;
          align-items: center;
          min-height: 100vh;
          margin: 0;
          background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
          color: white;
          text-align: center;
        }
        .container { padding: 20px; }
        .spinner {
          width: 50px;
          height: 50px;
          border: 3px solid rgba(255,255,255,0.3);
          border-radius: 50%;
          border-top-color: white;
          animation: spin 1s linear infinite;
          margin: 0 auto 20px;
        }
        @keyframes spin { to { transform: rotate(360deg); } }
        h1 { font-size: 24px; margin-bottom: 10px; }
        p { opacity: 0.9; margin-bottom: 20px; }
        .btn {
          display: inline-block;
          padding: 12px 24px;
          background: white;
          color: #667eea;
          text-decoration: none;
          border-radius: 8px;
          font-weight: 600;
          margin: 5px;
        }
      </style>
    </head>
    <body>
      <div class="container">
        <div class="spinner"></div>
        <h1>Opening App...</h1>
        <p>If the app doesn't open, tap below to download</p>
        <a href="#{store_url}" class="btn">Download App</a>
      </div>
      <script>
        (function() {
          var appUri = "#{app_uri}";
          var storeUrl = "#{store_url}";
          var timeout = #{timeout};
          var androidIntent = "#{android_intent}";
          var isAndroid = #{is_android};

          var startTime = Date.now();
          var hasFocus = true;

          // Track if user leaves the page (app opened)
          window.addEventListener('blur', function() { hasFocus = false; });
          window.addEventListener('pagehide', function() { hasFocus = false; });
          document.addEventListener('visibilitychange', function() {
            if (document.hidden) hasFocus = false;
          });

          // Try to open app
          var iframe = document.createElement('iframe');
          iframe.style.display = 'none';
          iframe.src = appUri;
          document.body.appendChild(iframe);

          // Also try direct location for some browsers
          setTimeout(function() {
            if (hasFocus) {
              window.location.href = appUri;
            }
          }, 100);

          // Android: try intent scheme as fallback
          if (isAndroid && androidIntent) {
            setTimeout(function() {
              if (hasFocus && Date.now() - startTime < timeout) {
                window.location.href = androidIntent;
              }
            }, 500);
          }

          // Fallback to store after timeout
          setTimeout(function() {
            if (hasFocus && Date.now() - startTime >= timeout - 100) {
              window.location.href = storeUrl;
            }
          }, timeout);
        })();
      </script>
    </body>
    </html>
  HTML
end