scripts-greasemonkey: add Invidious Instance Changer

1 files changed, 179 insertions, 0 deletions

diff --git a/scripts-greasemonkey/invidious_changer.user.js b/scripts-greasemonkey/invidious_changer.user.js
new file mode 100644
index 0000000..aaa9ff6
--- /dev/null
+++ b/scripts-greasemonkey/invidious_changer.user.js
@@ -0,0 +1,179 @@
+// ==UserScript==
+// @name        Invidious Instance Changer
+// @namespace   InvidiousChanger
+// @author      Cyberdevil
+// @license     GPL version 3 or any later version::: https://www.gnu.org/licenses/gpl-3.0.html
+// @description Menu UI Invidious instances changer
+// @homepageURL https://libregit.spks.xyz/heckyel/book/src/branch/master/scripts-greasemonkey
+// @include     https://*
+// @version     0.0.3
+// @grant       GM.setValue
+// @grant       GM.getValue
+// @grant       GM.xmlhttpRequest
+// ==/UserScript==
+
+// Console Style - Debug
+let consoleCSS = 'background: #000; color: #00FF00; padding: 0px 7px; border: 1px solid #00FF00; line-height: 16px;';
+
+// BETWEEN HERE and ..
+if (GM_getValue('invidious.instances.isUpdating') === true) { return; }
+
+const instancesStr = GM_getValue('invidious.instances');
+if (!instancesStr){ // First time fetching instances list.
+  updateInstances();
+  return;
+}
+
+let instances = instancesStr.split(';');
+if (instances.indexOf(window.location.host) < 0) { return; }
+// .. BETWEEN HERE is run on every request, so keep it minimal.
+
+
+let lastUpdated = GM_getValue('invidious.instances.lastUpdate');
+let diffHours = (Date.now() - lastUpdated) / (1000 * 60 * 60);
+//let diffMins = (Date.now() - lastUpdated) / (1000 * 60);
+
+// Update instances
+if (diffHours > 24) {
+  updateInstances();
+}
+
+function updateInstances() {
+  GM_setValue('invidious.instances.isUpdating', true);
+  GM_xmlhttpRequest ({
+    method: 'GET',
+    url   : 'https://instances.invidio.us/instances.json',
+    onload: function (request) {
+      if(request.readyState == 4) {
+	if(request.status == 200) {
+	  processJson(JSON.parse(request.responseText));
+	  saveInstances();
+	}
+	GM_setValue('invidious.instances.isUpdating', false);
+      }
+    }
+  });
+}
+
+function processJson(json) {
+  let newList = [];
+  for (i in json) {
+    if (json[i][1]['type'] != 'https') {
+      continue;
+    }
+    if (!json[i][1]['monitor']) {
+      continue;
+    }
+    if( json[i][1]['monitor']['statusClass'] != 'success') {
+      continue;
+    }
+
+    newList.push(json[i][1]['uri']);
+    console.log(json[i][0]);
+  }
+  instances = newList;
+}
+
+function saveInstances() {
+  let str = '';
+  for (i in instances) {
+    let url = new URL(instances[i]);
+    str = str.concat(url.host).concat(";");
+    console.log(url.host);
+  }
+  str = str.substr(0,str.length-1)
+  console.log(str);
+  GM_setValue('invidious.instances.lastUpdate', Date.now());
+  GM_setValue('invidious.instances', str);
+}
+
+function getRandomInstance() {
+  let newInstances = instances
+  newInstances.splice (newInstances.indexOf(parsedUrl.host), 1); // remove current instance.
+  let random = Math.floor(Math.random() * newInstances.length)
+  return newInstances[Math.floor(Math.random() * newInstances.length)];
+}
+
+function generateRandomUrl(args) {
+  return generateUrl(getRandomInstance(), args);
+}
+
+function generateUrl(host, args) {
+  let url = "https://".concat(host.concat("/"));
+  url = url.concat(args);
+  return url;
+}
+
+// --- UI stuff
+const parsedUrl = new URL(window.location);
+// -- UI methods
+function go() {
+  // Change instance
+  const args = parsedUrl.pathname.substr(1, parsedUrl.pathname.length).concat(parsedUrl.search);
+  const url = generateUrl(instanceSelect.item(instanceSelect.selectedIndex).text, args);
+  replaceUrl(url);
+}
+
+function random() {
+  // Change to random instance
+  const args = parsedUrl.pathname.substr(1, parsedUrl.pathname.length).concat(parsedUrl.search);
+  const url = generateRandomUrl(args);
+  replaceUrl(url);
+}
+
+function replaceUrl(url) {
+  window.location.replace(url);
+}
+
+// -- UI elements
+// - Main div
+let mainDiv = document.createElement("div");
+mainDiv.style.width = "200px";
+mainDiv.style.position = "fixed";
+mainDiv.style.top = 0;
+
+// - Combobox
+let instanceSelect = document.createElement("select");
+instanceSelect.style.color = "#fff";
+instanceSelect.style.background = "#232323";
+instanceSelect.style.border = "1px solid #a0a0a0";
+for (i in instances) {
+  if (instances[i] == parsedUrl.host) {
+    // Skip current instance
+    continue;
+  }
+  let option = document.createElement("option");
+  option.text = instances[i];
+  instanceSelect.add(option);
+}
+
+// - Go button
+let goButton = document.createElement("input");
+goButton.style.color = "#fff";
+goButton.style.background = " #232323";
+goButton.style.border = "1px solid #a0a0a0";
+goButton.setAttribute("type", "button");
+goButton.setAttribute("value", "Go");
+goButton.addEventListener("click", go, false);
+
+// - Random button
+let randomButton = document.createElement("input");
+randomButton.style.color = "#fff";
+randomButton.style.background = " #232323";
+randomButton.style.border = "1px solid #a0a0a0";
+randomButton.setAttribute("type", "button");
+randomButton.setAttribute("value", "Random");
+randomButton.addEventListener("click", random, false);
+
+// - Add stuff
+mainDiv.appendChild(instanceSelect);
+mainDiv.appendChild(goButton);
+mainDiv.appendChild(randomButton);
+document.body.appendChild(mainDiv);
+
+function statuscheck(){
+  // Console Feedback
+  console.log("%cUSERSCRIPT | " + GM_info.script.name + " " + GM_info.script.version + " | successfully initialized", consoleCSS);
+}
+
+statuscheck();