Add manifest.json, icons and install button, flatten client/src

client/js/utils/color.js

@@ -0,0 +1,42 @@
+/* eslint-disable no-bitwise */
+import { hsluvToHex } from 'hsluv';
+
+//
+// github.com/sindresorhus/fnv1a
+//
+const OFFSET_BASIS_32 = 2166136261;
+
+const fnv1a = string => {
+  let hash = OFFSET_BASIS_32;
+
+  for (let i = 0; i < string.length; i++) {
+    hash ^= string.charCodeAt(i);
+
+    // 32-bit FNV prime: 2**24 + 2**8 + 0x93 = 16777619
+    // Using bitshift for accuracy and performance. Numbers in JS suck.
+    hash +=
+      (hash << 1) + (hash << 4) + (hash << 7) + (hash << 8) + (hash << 24);
+  }
+
+  return hash >>> 0;
+};
+
+const colors = [];
+
+for (let i = 0; i < 72; i++) {
+  colors[i] = hsluvToHex([i * 5, 40, 50]);
+  colors[i + 72] = hsluvToHex([i * 5, 70, 50]);
+  colors[i + 144] = hsluvToHex([i * 5, 100, 50]);
+}
+
+const cache = {};
+
+export default function stringToRGB(str) {
+  if (cache[str]) {
+    return cache[str];
+  }
+
+  const color = colors[fnv1a(str) % colors.length];
+  cache[str] = color;
+  return color;
+}