♻️ Refactor uuid impl module.

Make it crossplatform (browser, nodejs, jvm).

common/uxbox/common/uuid.cljc

@@ -14,7 +14,7 @@
      (:require [clj-uuid :as impl]
                [clojure.core :as c])
      :cljs
-     (:require ["./uuid_impl.js" :as impl]
+     (:require [uxbox.common.uuid-impl :as impl]
                [cljs.core :as c])))
 
 (def zero #uuid "00000000-0000-0000-0000-000000000000")

common/uxbox/common/uuid_impl.js

@@ -1,4 +1,4 @@
-/*
+/**
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
@@ -10,32 +10,43 @@
  */
 "use strict";
 
-import cljs from "goog:cljs.core";
+goog.require("cljs.core");
+goog.provide("uxbox.common.uuid_impl");
 
-const global = goog.global;
-const crypto = global.crypto;
+goog.scope(function() {
+  const core = cljs.core;
+  const self = uxbox.common.uuid_impl;
 
-function fill(buf) {
+  const fill = (() => {
+    if (typeof window === "object") {
+      return (buf) => {
+        window.crypto.getRandomValues(buf);
+        return buf;
+      };
+    } else if (typeof self === "object") {
+      return (buf) => {
+        self.crypto.getRandomValues(buf);
+        return buf;
+      };
+    } else if (typeof require === "function") {
+      const crypto = require("crypto");
+      return (buf) => {
         crypto.getRandomValues(buf);
         return buf;
       };
-
-// NOTE: NodeJS compatibility
-if (typeof require === "function") {
-  global.crypto = require("crypto");
-}
-
-if (global.crypto === undefined) {
+    } else {
+      // FALLBACK
       console.warn("No high quality RNG available, switching back to Math.random.");
 
-  fill = function(buf) {
+      return (buf) => {
         for (let i = 0, r; i < buf.length; i++) {
           if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
           buf[i] = r >>> ((i & 0x03) << 3) & 0xff;
         }
         return buf;
+      };
     }
-}
+  })();
 
   /*
    * The MIT License (MIT)
@@ -88,11 +99,11 @@ function toHexString(buf) {
 
   const buff = new Uint8Array(16);
 
-export function v4() {
+  function v4() {
     fill(buff);
     buff[6] = (buff[6] & 0x0f) | 0x40;
     buff[8] = (buff[8] & 0x3f) | 0x80;
-  return cljs.uuid(toHexString(buff));
+    return core.uuid(toHexString(buff));
   }
 
   let initialized = false;
@@ -101,7 +112,7 @@ let clockseq;
   let lastms = 0;
   let lastns = 0;
 
-export function v1() {
+  function v1() {
     let cs = clockseq;
 
     if (!initialized) {
@@ -179,5 +190,9 @@ export function v1() {
       buff[i + n] = node[n];
     }
 
-  return cljs.uuid(toHexString(buff));
+    return core.uuid(toHexString(buff));
   }
+
+  self.v1 = v1;
+  self.v4 = v4;
+});