qortal-web-builder/qortal-web-app/public/embed-bridge-relay.js

/** Relay qortalRequest from embedded child iframes (websites) to Hub via Qortal Web. */
(function () {
  function isChildFrameSource(src) {
    if (!src || src === window) return false;
    try {
      var ifr = document.getElementsByTagName('iframe');
      for (var i = 0; i < ifr.length; i++) {
        if (ifr[i].contentWindow === src) return true;
      }
    } catch (e) {
      return false;
    }
    return false;
  }

  window.addEventListener('message', function (ev) {
    if (!ev || !ev.data) return;
    if (!ev.ports || !ev.ports[0]) return;
    if (typeof ev.data.action !== 'string' || !ev.data.action) return;
    if (!isChildFrameSource(ev.source)) return;

    var port = ev.ports[0];
    function replyRes(res) {
      try {
        port.postMessage({ result: res, error: null });
      } catch (e) {}
    }
    function replyErr(err) {
      var msg;
      if (err == null) msg = 'Unknown error';
      else if (typeof err === 'string') msg = err;
      else if (err && typeof err === 'object' && 'message' in err) msg = String(err.message);
      else msg = String(err);
      try {
        port.postMessage({ result: null, error: { message: msg } });
      } catch (e) {}
    }

    if (typeof window.qortalRequest === 'function') {
      var clean = {};
      for (var k in ev.data) {
        if (Object.prototype.hasOwnProperty.call(ev.data, k) && k !== 'requestedHandler') clean[k] = ev.data[k];
      }
      var run =
        typeof window.qortalRequestWithNoTimeout === 'function'
          ? window.qortalRequestWithNoTimeout(clean)
          : window.qortalRequest(clean);
      run.then(replyRes, function (e) {
        replyErr(e);
      });
      return;
    }
    if (window.top && window.top !== window) {
      try {
        window.top.postMessage(ev.data, '*', [port]);
      } catch (e) {
        replyErr(e);
      }
      return;
    }
    replyErr('No Qortal bridge on this page for embedded website');
  });
})();