Add name triple utils

package-lock.json

@@ -1276,6 +1276,11 @@
         "supports-color": "^2.0.0"
       }
     },
+    "chance": {
+      "version": "1.0.16",
+      "resolved": "https://registry.npmjs.org/chance/-/chance-1.0.16.tgz",
+      "integrity": "sha512-2bgDHH5bVfAXH05SPtjqrsASzZ7h90yCuYT2z4mkYpxxYvJXiIydBFzVieVHZx7wLH1Ag2Azaaej2/zA1XUrNQ=="
+    },
     "chardet": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz",

package.json

@@ -20,6 +20,7 @@
     "eslint-plugin-react": "^7.10.0"
   },
   "dependencies": {
+    "chance": "^1.0.16",
     "matrix-appservice-bridge": "^1.6.1",
     "matrix-js-sdk": "^0.10.9",
     "npm": "^6.4.1",

utils/usernameTriplets/core.js

@@ -0,0 +1,27 @@
+const adjectives = require('./adjectives');
+const animals = require('./animals');
+const { randGen, seededRandNth } = require('./random');
+
+const pickRandom = (gen, vector) => seededRandNth(gen, vector);
+
+const buildGfy = publicKey => {
+  const gen = randGen(publicKey);
+  const firstAdjective = pickRandom(gen, adjectives);
+  const secondAdjective = pickRandom(gen, adjectives);
+  const animal = pickRandom(gen, animals);
+  return `${firstAdjective} ${secondAdjective} ${animal}`;
+};
+
+const generateGfy = publicKey => {
+  if (publicKey === null || publicKey === '0') {
+    return 'Unknown';
+  }
+
+  if (typeof publicKey === 'undefined') {
+    return buildGfy(new Date().getTime());
+  }
+
+  return buildGfy(publicKey);
+};
+
+module.exports = { generateGfy };

utils/usernameTriplets/random.js

@@ -0,0 +1,9 @@
+const Chance = require('chance');
+
+const randGen = seed => new Chance(seed);
+
+const seededRandInt = (gen, n) => gen.integer({ min: 0, max: n - 1 });
+
+const seededRandNth = (gen, coll) => coll[seededRandInt(gen, coll.length)];
+
+module.exports = { randGen, seededRandNth };