Merge pull request #453 in RMS/api-main-service from red-develop to RMSv2

* commit '125712fa':
  bulk create user

app/helper/email_service/sender.py

 import os
-from django.core.mail import send_mail
+from django.core.mail import send_mail, EmailMessage
 
 from app.entities import models
 from django.conf import settings
+from django.core import mail as email_connection
+from django.db import transaction
+
+
+@transaction.atomic
+def batch_email_users(args):
+    # print(args[0])
+    connection = email_connection.get_connection()
+    messages = []
+    connection.open()
+
+
+    for data in args[0].iterator():
+        name = data['name']
+        username = data['username']
+        password = data['password']
+        recipient = data['email']
+        admin = args[1]
+        F = open(os.path.join(settings.EMAIL_TEMPLATES_ROOT, 'RMS-NEWUSER.html'), 'r')
+
+        FC = F.read()
+
+        FC = FC.replace('{name}', name)
+        FC = FC.replace('{username}', username)
+        FC = FC.replace('{password}', password)
+        FC = FC.replace('{url}', settings.FRONT_END_URL + '/cms/profile')
+        send_mail(
+            subject='Resource Management System: Welcome!',
+            message='',
+            from_email=settings.EMAIL_DEFAULT_SENDER,
+            recipient_list=(recipient,),
+            html_message=FC,
+            fail_silently=False
+        )
+        models.UserHistory.objects.filter(username=username).update(sent=True)
+    connection.close()
+    return True
+
+
+def batch_email_admin(args):
+    filename = args[0]
+    recipient = args[1]
+
+    email = EmailMessage(
+        'Resource Management System: Bulk Users!',
+        'kindly see the attach file.',
+        settings.EMAIL_DEFAULT_SENDER,
+        [recipient]
+    )
+    email.attach_file(filename)
+    email.send()
+    os.remove(filename)
 
 
 def account_created(args):