Moved route definitions into env wrapped check, webpackified embed

client/coral-embed/src/index.js

@@ -0,0 +1,119 @@
+import pym from 'pym.js';
+
+// This function should return value of window.Coral
+const Coral = {};
+const Talk = Coral.Talk = {};
+
+// build the URL to load in the pym iframe
+function buildStreamIframeUrl(talkBaseUrl, asset) {
+  let iframeUrl = [
+    talkBaseUrl,
+    (talkBaseUrl.match(/\/$/) ? '' : '/'), // make sure no double-'/' if opts.talk already ends with '/'
+    'embed/stream?asset_url=',
+    encodeURIComponent(asset)
+  ].join('');
+  return iframeUrl;
+}
+
+// Set up postMessage listeners/handlers on the pymParent
+// e.g. to resize the iframe, and navigate the host page
+function configurePymParent(pymParent, assetUrl) {
+  let notificationOffset = 200;
+  let ready = false;
+
+  // Resize parent iframe height when child height changes
+  pymParent.onMessage('height', function(height) {
+
+    // TODO: In local testing, this is firing nonstop. Maybe there's a bug on the inside?
+    // Or it's by design of pym... but that's very wasteful of CPU and DOM reflows (jank)
+    pymParent.el.querySelector('iframe').height = `${height  }px`;
+  });
+
+  // Helps child show notifications at the right scrollTop
+  pymParent.onMessage('getPosition', function() {
+    let position = viewport().height + document.body.scrollTop;
+
+    if (position > notificationOffset) {
+      position = position - notificationOffset;
+    }
+
+    pymParent.sendMessage('position', position);
+  });
+
+  // Tell child when parent's DOMContentLoaded
+  pymParent.onMessage('childReady', function () {
+    const interval = setInterval(function () {
+      if (ready) {
+        window.clearInterval(interval);
+
+        // @todo - It's weird to me that this is sent here in addition to the iframe URL. Could it just be in one place?
+        pymParent.sendMessage('DOMContentLoaded', assetUrl);
+      }
+    }, 100);
+  });
+
+  // When end-user clicks link in iframe, open it in parent context
+  pymParent.onMessage('navigate', function (url) {
+    window.open(url, '_blank').focus();
+  });
+
+  // wait till images and other iframes are loaded before scrolling the page.
+  // or do we want to be more aggressive and scroll when we hit DOM ready?
+  document.addEventListener('DOMContentLoaded', function () {
+    ready = true;
+  });
+
+  // get dimensions of viewport
+  const viewport = () => {
+    let e = window, a = 'inner';
+    if ( !( 'innerWidth' in window ) ){
+      a = 'client';
+      e = document.documentElement || document.body;
+    }
+    return {
+      width : e[`${a}Width`],
+      height : e[`${a}Height`]
+    };
+  };
+}
+
+/**
+ * Render a Talk stream
+ * @param {HTMLElement} el - Element to render the stream in
+ * @param {Object} opts - Configuration options for talk
+ * @param {String} opts.talk - Talk base URL
+ * @param {String} [opts.title] - Title of Stream (rendered in iframe)
+ * @param {String} [opts.asset] - parent Asset ID or URL. Comments in the
+ * stream will replies to this asset
+ */
+Talk.render = function (el, opts) {
+  if ( ! el) {
+    throw new Error('Please provide Coral.Talk.render() the HTMLElement you want to render Talk in.');
+  }
+  if (typeof el !== 'object') {
+    throw new Error(`Coral.Talk.render() expected HTMLElement but got ${el} (${typeof el})`);
+  }
+  opts = opts || {};
+
+  // @todo infer this URL without explicit user input (if possible, may have to be added at build/render time of this script)
+  if (! opts.talk) {
+    throw new Error('Coral.Talk.render() expects opts.talk as the Talk Base URL');
+  }
+
+  // ensure el has an id, as pym can't directly accept the HTMLElement
+  if (!el.id) {
+    el.id = `_${Math.random()}`;
+  }
+
+  let asset = opts.asset || window.location;
+  let pymParent = new pym.Parent(el.id, buildStreamIframeUrl(opts.talk, asset), {
+    title: opts.title,
+    asset_url: asset,
+    id: `${el.id}_iframe`,
+    name: `${el.id}_iframe`
+  });
+
+  configurePymParent(pymParent, asset);
+};
+
+export default Coral;