move styles and scripts into directories

script/shuffle.ts

@@ -0,0 +1,66 @@
+function group<A>(subject: A[], keepTogether: A[][]): A[][] {
+  type Value = {array: A[], added: boolean};
+
+  let groups: Map<A, Value> = new Map;
+  for (const xs of keepTogether) {
+    let value = {array: xs, added: false};
+    for (const x of xs) { groups.set(x, value); }
+  }
+
+  let res = [];
+
+  for (const x of subject) {
+    let group = groups.get(x);
+    if (group?.added) { continue; }
+    else if (group) {
+      group.added = true;
+      res.push(group.array);
+    } else {
+      res.push([x]);
+    }
+  }
+
+  return res;
+}
+
+function shuffle<A>(subject: A[]): A[] {
+  let res = Array.from(subject);
+
+  for (let i = 0; i < res.length - 2; ++i) {
+    const j = i + Math.floor(Math.random() * (res.length - i));
+    if (i != j) {
+      const k = res[i]!;
+      res[i] = res[j]!;
+      res[j] = k;
+    }
+  }
+
+  return res;
+}
+
+function groupedShuffle<A>(subject: A[], keepTogether: A[][]): A[] {
+  let groups = group(subject, keepTogether);
+  return shuffle(groups).flat();
+}
+
+function shuffleAll() {
+  let groups = [group('myno', 'abyss')];
+
+  for (const elem of Array.from(document.getElementsByClassName('shuffle'))) {
+    let shuffled = groupedShuffle(Array.from(elem.children), groups);
+
+    elem.innerHTML = '';
+    for (const child of shuffled) {
+      elem.appendChild(child);
+    }
+  }
+
+  function group(...xs: string[]) {
+    let elements = xs.map(x => document.getElementById(x));
+    return elements.every(x => x) ? elements as HTMLElement[] : [];
+  }
+}
+
+document.addEventListener('DOMContentLoaded', shuffleAll);
+
+export {};