add migration for lowercase version of emails and username

migrations/20151021_usernames_emails_lowercase.js

@@ -0,0 +1,63 @@
+/*
+ * Migrate email to lowerCase version and add auth.local.lowerCaseUsername email
+ */
+
+var mongo = require('mongoskin');
+var async = require('async');
+
+var dbserver = 'url';
+var dbname = 'dbname';
+var countUsers = 0;
+
+var db = mongo.db(dbserver + '/' + dbname + '?auto_reconnect');
+var dbUsers = db.collection('users');
+
+console.log('Begins work on db');
+
+function findUsers(gt){
+  var query = {};
+  if(gt) query._id = {$gt: gt};
+
+  console.log(query)
+
+  dbUsers.find(query, {
+    fields: {_id: 1, auth: 1},
+    limit: 10000,
+    sort: {
+      _id: 1
+    }
+  }).toArray(function(err, users){
+    if(err) throw err;
+
+    var lastUser = null;
+    if(users.length === 10000){
+      lastUser = users[users.length - 1];
+    }
+
+    async.eachLimit(users, 20, function(user, cb){
+      countUsers++;
+      console.log('User: ', countUsers, user._id);
+
+      var update = {
+        $set: {};
+      };
+
+      if(user.auth && user.auth.local) {
+        if(user.auth.local.username) update['$set']['auth.local.lowerCaseUsername'] = user.auth.local.username.toLowerCase();
+        if(user.auth.local.email) update['$set']['auth.local.email'] = user.auth.local.email.toLowerCase();
+      }
+
+      dbUsers.update({
+        _id: user._id
+      }, update, cb);
+    }, function(err){
+      if(err) throw err;
+
+      if(lastUser && lastUser._id){
+        findUsers(lastUser._id);
+      }
+    });
+  });
+};
+
+findUsers();