fix: weapp uuid error.

Author: onerain88

src/InstallationController.js

@@ -10,7 +10,12 @@
  */
 
 import Storage from './Storage';
-const uuidv4 = require('uuid/v4');
+let uuidv4 = null;
+if (process.env.PARSE_BUILD === 'weapp') {
+  uuidv4 = require('./uuid.weapp');
+} else {
+  uuidv4 = require('uuid/v4');
+}
 
 let iidCache = null;
 

src/uuid.weapp.js

@@ -0,0 +1,17 @@
+function uuid() {
+  const s = [];
+  const hexDigits = '0123456789abcdef';
+
+  for (let i = 0; i < 36; i++) {
+    s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
+  }
+
+  s[14] = '4'; // bits 12-15 of the time_hi_and_version field to 0010
+  s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
+  s[8] = s[13] = s[18] = s[23] = '-';
+
+  const uuid = s.join('');
+  return uuid;
+}
+
+module.exports = uuid;