randomize

src/js/browser.js

@@ -1,8 +1,17 @@
 import {createElem as el} from './elem.js';
+import { PseudoRandom } from './random.js';
 
+const r = new PseudoRandom();
 const tocElem = document.querySelector('#toc');
 const toc = await (await fetch('toc.json')).json();
 
+const seed = parseInt(sessionStorage.getItem('seed') || (Math.random() * 0x7FFF_FFFF));
+sessionStorage.setItem('seed', seed);
+r.reset(seed);
+
+toc.forEach(v => v.rank = r.rand());
+toc.sort((a, b) => a.rank - b.rank);
+
 for (const {id, name, username, avatarUrl, screenshotURL} of toc) {
   const artUrl = `art/${id}`;
   tocElem.appendChild(el('div', [

src/js/main.js

@@ -980,14 +980,6 @@ define([
       };
     }
 
-    document.querySelectorAll('.parentLink').forEach(elem => {
-      elem.addEventListener('click', function(event) {
-        if (parent) {
-          parent.location.href = this.href;
-        }
-      });
-    });
-
     var notifier = new Notifier({
       timeout: 7.5,
       container: document.body,
@@ -2145,6 +2137,14 @@ define([
       }
     }
 
+    document.querySelectorAll('.parentLink').forEach(elem => {
+      elem.addEventListener('click', function(event) {
+        if (parent) {
+          parent.location.href = this.href;
+        }
+      });
+    });
+
     vs.setSettings(settings, options);
   }
 

src/js/random.js

@@ -0,0 +1,47 @@
+const RANDOM_RANGE = Math.pow(2, 32);
+
+export class PseudoRandom {
+  #randomSeed = 0;
+
+  /**
+   * Returns a deterministic pseudo random number between 0 and 1
+   * @return {number} a random number between 0 and 1
+   */
+  random() {
+    return (this.#randomSeed =
+            (134775813 * this.#randomSeed + 1) %
+            RANDOM_RANGE) / RANDOM_RANGE;
+  };
+
+  /**
+   * Reset the pseudo random number generator (whit optional seed)
+   * @param {number} [seed] 
+   */
+  reset(seed = 0) {
+    this.#randomSeed = seed;
+  }
+
+  /**
+   * Return a random number between 0 and n (but not n)
+   * @param {number} [min]
+   * @param {number} [max]
+   */
+  rand(min, max) {
+    if (min === undefined) {
+      min = 0;
+      max = 1;
+    } else if (max === undefined) {
+      max = min;
+      min = 0;
+    }
+    return min + this.random() * (max - min);
+  }
+
+  /**
+   * Return a random integer between 0 and n-1
+   * @param {number} n
+   */
+  randInt(min, max) {
+    return Math.floor(this.rand(min, max));
+  }
+}