first commit

pb_hooks/util.js

@@ -0,0 +1,13 @@
+module.exports = {
+  uuidv4() {
+    const uuid = new Array(36);
+    for (let i = 0; i < 36; i++) {
+      uuid[i] = Math.floor(Math.random() * 16)
+    }
+    uuid[14] = 4;
+    uuid[19] = uuid[19] &= ~(1 << 2);
+    uuid[19] = uuid[19] |= (1 << 3);
+    uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
+    return uuid.map(x => x.toString(16)).join('')
+  }
+}