From b02cbdfad9710662ca9b2e543952cee36f74b7cd Mon Sep 17 00:00:00 2001
From: Helena Rasche <hxr@hx42.org>
Date: Wed, 1 Sep 2021 15:48:51 +0200
Subject: [PATCH] Implement news webhook to handle release announcements

---
 config/plugins/webhooks/news/config.yml |   7 ++
 config/plugins/webhooks/news/script.js  | 103 ++++++++++++++++++++++++
 config/plugins/webhooks/news/styles.css |  28 +++++++
 3 files changed, 138 insertions(+)
 create mode 100644 config/plugins/webhooks/news/config.yml
 create mode 100644 config/plugins/webhooks/news/script.js
 create mode 100644 config/plugins/webhooks/news/styles.css

diff --git a/config/plugins/webhooks/news/config.yml b/config/plugins/webhooks/news/config.yml
new file mode 100644
index 00000000000..9c35b671c8c
--- /dev/null
+++ b/config/plugins/webhooks/news/config.yml
@@ -0,0 +1,7 @@
+id: news
+type:
+  - masthead
+activate: true
+
+icon: fa-bell
+tooltip: See the Galaxy Release Notes
diff --git a/config/plugins/webhooks/news/script.js b/config/plugins/webhooks/news/script.js
new file mode 100644
index 00000000000..0931a9f5c49
--- /dev/null
+++ b/config/plugins/webhooks/news/script.js
@@ -0,0 +1,103 @@
+function removeNewsOverlay() {
+  document.getElementById("news-container").style.visibility = "hidden";
+}
+
+function showNewsOverlay() {
+  document.getElementById("news-container").style.visibility = "visible";
+  newsSeen();
+}
+
+function newsSeen() {
+  var el = document.getElementById("news-unseen-pip");
+  el.parentNode.removeChild(el);
+  window.localStorage.setItem(
+    "galaxy-news-seen-release",
+    Galaxy.config.version_major
+  );
+}
+
+function newsUnseen() {
+  let econtainer = document.getElementById("news").children[0];
+  econtainer.insertAdjacentHTML(
+    "beforeend",
+    `
+        <span id="news-unseen-pip" class="nav-note fa fa-circle"></span>
+        `
+  );
+}
+
+function addNewsIframe() {
+  let currentGalaxyVersion = Galaxy.config.version_major;
+  let releaseNotes = `https://docs.galaxyproject.org/en/master/releases/${currentGalaxyVersion}_announce_user.html`;
+  let lastSeenVersion = window.localStorage.getItem("galaxy-news-seen-release");
+  // Check that they've seen the current version's release notes.
+  if (lastSeenVersion != currentGalaxyVersion) {
+    newsUnseen();
+  }
+
+  document.querySelector("body.full-content").insertAdjacentHTML(
+    "afterbegin",
+    `
+            <div id="news-container" style="visibility: hidden">
+                <div id="news-screen-overlay"></div>
+                <div id="news-screen">
+                    <div id="news-header">
+                        <iframe id="news-embed" src="${releaseNotes}" width="80%" height="80%"></iframe>
+                    </div>
+                </div>
+            </div>`
+  );
+
+  // Clicking outside of GTN closes it
+  document.getElementById("news-screen").addEventListener("click", () => {
+    removeNewsOverlay();
+  });
+}
+
+/* The masthead icon may not exist yet when this webhook executes; we need this to wait for that to happen.
+ * elementReady function from gist:
+ * https://gist.github.com/jwilson8767/db379026efcbd932f64382db4b02853e
+ */
+function elementReadyNews(selector) {
+  return new Promise((resolve, reject) => {
+    let el = document.querySelector(selector);
+    if (el) {
+      resolve(el);
+    }
+    new MutationObserver((mutationRecords, observer) => {
+      // Query for elements matching the specified selector
+      Array.from(document.querySelectorAll(selector)).forEach(element => {
+        resolve(element);
+        //Once we have resolved we don't need the observer anymore.
+        observer.disconnect();
+      });
+    }).observe(document.documentElement, {
+      childList: true,
+      subtree: true
+    });
+  });
+}
+
+elementReadyNews("#news a").then(el => {
+  // External stuff may also have attached a click handler here (vue-based masthead)
+  // replace with a clean copy of the node to remove all that cruft.
+  clean = el.cloneNode(true);
+  el.parentNode.replaceChild(clean, el);
+
+  // This gets added by default.
+  addNewsIframe();
+
+  clean.addEventListener("click", e => {
+    e.preventDefault();
+    e.stopPropagation();
+    showNewsOverlay();
+  });
+});
+
+// Remove the overlay on escape button click
+document.addEventListener("keydown", e => {
+  // Check for escape button - "27"
+  if (e.which === 27 || e.keyCode === 27) {
+    removeNewsOverlay();
+  }
+});
diff --git a/config/plugins/webhooks/news/styles.css b/config/plugins/webhooks/news/styles.css
new file mode 100644
index 00000000000..7ac3231209d
--- /dev/null
+++ b/config/plugins/webhooks/news/styles.css
@@ -0,0 +1,28 @@
+#news-screen {
+	position: fixed;
+	z-index: 202;
+	width:100%;
+	height:100%;
+}
+
+#news-screen-overlay {
+	position: fixed;
+	top:0;
+	left:0;
+	background: rgba(224, 224, 224, 0.75);
+	z-index: 201;
+	width:100%;
+	height:100%;
+	opacity: 2;
+}
+
+#news-header {
+	position: fixed;
+	height: 100%;
+	width: 100%;
+	z-index: 203;
+	display: flex;
+	justify-content: center;
+	flex-direction: column;
+	align-items: center;
+}