Randomize DNS table order (#2438)

Signed-off-by: Daniel Gray <dngray@privacyguides.org>

theme/assets/javascripts/randomize-element.js

@@ -0,0 +1,65 @@
+/**
+ * @overview Randomizes the order of an HTML element's children.
+ * @author Jonah Aragon <jonah@triplebit.net>
+ * @license
+ * Copyright (c) 2024 Jonah Aragon
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+// Fetch global data from meta tag
+let globalData = document.querySelector("#global-data");
+
+if (globalData.dataset.randomizeElement) {
+  // Get elements to be randomized from meta tag in HTML
+  let randomizeElement = globalData.dataset.randomizeElement;
+  console.log("Randomizing child elements of " + randomizeElement);
+
+  // Get all elements to be randomized
+  let randomizeChildren = document.querySelectorAll(randomizeElement);
+  let randomizeArray = Array.from(randomizeChildren);
+
+  // Handle multiple elements to be randomized
+  for (const element of randomizeArray) {
+    let selector = " > *";
+    if (globalData.dataset.randomizeElementSelector) {
+      selector = globalData.dataset.randomizeElementSelector
+    }
+
+    // Select all direct children of element
+    let children = element.querySelectorAll(randomizeElement + selector);
+
+    // Randomize rows (simple, probably not efficient)
+    let randomChildren = Array.from(children)
+      .map(value => ({ value, sort: Math.random() }))
+      .sort((a, b) => a.sort - b.sort)
+      .map(({ value }) => value);
+
+    // Replace each element with randomly selected element
+    for (let i = 0; i < children.length; i++) {
+      let child = randomChildren[i].cloneNode(true);
+      child.classList.add("randomized");
+      let parent = children[i].parentNode;
+      parent.insertBefore(child, children[i]);
+      children[i].remove();
+    }
+
+  }
+
+}