feat: allow personalization of the From name and email for each recipient (#1020)

* feat: allow personalization of the From name and email for each recipient

Author: Bilal Boussayoud

examples/helpers/README.md

@@ -28,12 +28,16 @@ For more information on parameters and usage, see [here](../mail/mail.py)
 
 ### Creating Personalizations
 
-To create personalizations, you need a dictionary to store all your email components. See example [here](https://github.com/sendgrid/sendgrid-python/blob/0b683169b08d3a7c204107cd333be33053297e74/examples/helpers/mail_example.py#L47)
-After creating a dictionary, you can go ahead and create a `Personalization` object. 
+The personalization helper can be used to create personalizations and customize various aspects of an email. See example [here](mail_example.py) in `build_multiple_emails_personalized()`, and refer [here](https://docs.sendgrid.com/for-developers/sending-email/personalizations) for more documentation.
 ```
  mock_personalization = Personalization()
-    for to_addr in personalization['to_list']:
-       mock_personalization.add_to(to_addr)
+ 
+ for to_addr in personalization['to_list']:
+   mock_personalization.add_to(to_addr)
+
+ mock_personalization.set_from(from_addr)
+ mock_personalization.add_cc(cc_addr)
+ # etc...
 ```
 
 ### Creating Attachments

examples/helpers/mail_example.py

@@ -13,7 +13,7 @@ def build_hello_email():
     from sendgrid import SendGridAPIClient
     from sendgrid.helpers.mail import Mail, From, To, Subject, PlainTextContent, HtmlContent, SendGridException
 
-    message = Mail(from_email=From('from@example.com.com', 'Example From Name'),
+    message = Mail(from_email=From('from@example.com', 'Example From Name'),
                 to_emails=To('to@example.com', 'Example To Name'),
                 subject=Subject('Sending with SendGrid is Fun'),
                 plain_text_content=PlainTextContent('and easy to do anywhere, even with Python'),
@@ -26,25 +26,30 @@ def build_hello_email():
     except SendGridException as e:
         print(e.message)
 
-    for cc_addr in personalization['cc_list']:
+    mock_personalization = Personalization()
+    personalization_dict = get_mock_personalization_dict()
+
+    for cc_addr in personalization_dict['cc_list']:
         mock_personalization.add_to(cc_addr)
 
-    for bcc_addr in personalization['bcc_list']:
+    for bcc_addr in personalization_dict['bcc_list']:
         mock_personalization.add_bcc(bcc_addr)
 
-    for header in personalization['headers']:
+    for header in personalization_dict['headers']:
         mock_personalization.add_header(header)
 
-    for substitution in personalization['substitutions']:
+    for substitution in personalization_dict['substitutions']:
         mock_personalization.add_substitution(substitution)
 
-    for arg in personalization['custom_args']:
+    for arg in personalization_dict['custom_args']:
         mock_personalization.add_custom_arg(arg)
 
-    mock_personalization.subject = personalization['subject']
-    mock_personalization.send_at = personalization['send_at']
-    return mock_personalization
+    mock_personalization.subject = personalization_dict['subject']
+    mock_personalization.send_at = personalization_dict['send_at']
+
+    message.add_personalization(mock_personalization)
 
+    return message
 
 def get_mock_personalization_dict():
     """Get a dict of personalization mock."""
@@ -78,6 +83,36 @@ def get_mock_personalization_dict():
     mock_pers['send_at'] = 1443636843
     return mock_pers
 
+def build_multiple_emails_personalized():
+    import json
+    from sendgrid.helpers.mail import Mail, From, To, Cc, Bcc, Subject, PlainTextContent, \
+        HtmlContent, SendGridException, Personalization
+
+    # Note that the domain for all From email addresses must match
+    message = Mail(from_email=From('from@example.com', 'Example From Name'),
+                subject=Subject('Sending with SendGrid is Fun'),
+                plain_text_content=PlainTextContent('and easy to do anywhere, even with Python'),
+                html_content=HtmlContent('<strong>and easy to do anywhere, even with Python</strong>'))
+
+    mock_personalization = Personalization()
+    mock_personalization.add_to(To('test@example.com', 'Example User 1'))
+    mock_personalization.add_cc(Cc('test1@example.com', 'Example User 2'))
+    message.add_personalization(mock_personalization)
+
+    mock_personalization_2 = Personalization()
+    mock_personalization_2.add_to(To('test2@example.com', 'Example User 3'))
+    mock_personalization_2.set_from(From('from@example.com', 'Example From Name 2'))
+    mock_personalization_2.add_bcc(Bcc('test3@example.com', 'Example User 4'))
+    message.add_personalization(mock_personalization_2)
+
+    try:
+        print(json.dumps(message.get(), sort_keys=True, indent=4))
+        return message.get()
+
+    except SendGridException as e:
+        print(e.message)
+
+    return message
 
 def build_attachment1():
     """Build attachment mock. Make sure your content is base64 encoded before passing into attachment.content.
@@ -308,6 +343,15 @@ def build_kitchen_sink():
 
     return message
 
+def send_multiple_emails_personalized():
+    # Assumes you set your environment variable:
+    # https://github.com/sendgrid/sendgrid-python/blob/HEAD/TROUBLESHOOTING.md#environment-variables-and-your-sendgrid-api-key
+    message = build_multiple_emails_personalized()
+    sendgrid_client = SendGridAPIClient(os.environ.get('SENDGRID_API_KEY'))
+    response = sendgrid_client.send(message=message)
+    print(response.status_code)
+    print(response.body)
+    print(response.headers)
 
 def send_hello_email():
     # Assumes you set your environment variable:
@@ -334,5 +378,8 @@ def send_kitchen_sink():
 ## this will actually send an email
 # send_hello_email()
 
+## this will send multiple emails
+# send_multiple_emails_personalized()
+
 ## this will only send an email if you set SandBox Mode to False
 # send_kitchen_sink()

sendgrid/helpers/mail/personalization.py

@@ -6,6 +6,7 @@ class Personalization(object):
     def __init__(self):
         """Create an empty Personalization and initialize member variables."""
         self._tos = []
+        self._from_email = None
         self._ccs = []
         self._bccs = []
         self._subject = None
@@ -26,7 +27,10 @@ def add_email(self, email):
         if email_type.__name__ == 'Bcc':
             self.add_bcc(email)
             return
-        raise ValueError('Please use a To, Cc or Bcc object.')
+        if email_type.__name__ == 'From':
+            self.from_email = email
+            return
+        raise ValueError('Please use a To, From, Cc or Bcc object.')
 
     def _get_unique_recipients(self, recipients):
         unique_recipients = []
@@ -77,6 +81,17 @@ def add_to(self, email):
 
         self._tos.append(email.get())
 
+    @property
+    def from_email(self):
+        return self._from_email
+
+    @from_email.setter
+    def from_email(self, value):
+        self._from_email = value
+
+    def set_from(self, email):
+        self._from_email = email.get()
+
     @property
     def ccs(self):
         """A list of recipients who will receive copies of this email.
@@ -236,6 +251,10 @@ def get(self):
             if value:
                 personalization[key[:-1]] = value
 
+        from_value = getattr(self, 'from_email')
+        if from_value:
+            personalization['from'] = from_value
+
         for key in ['subject', 'send_at', 'dynamic_template_data']:
             value = getattr(self, key)
             if value:

test/test_mail_helpers.py

@@ -667,6 +667,15 @@ def test_personalization_add_email_filters_out_duplicate_to_emails_ignoring_case
 
         self.assertEqual([to_email.get()], p.tos)
 
+    def test_personalization_set_from_email(self):
+        self.maxDiff = None
+
+        p = Personalization()
+        from_email = From('test+from@example.com', 'Example From')
+        p.set_from(from_email)
+
+        self.assertEqual(from_email.get(), p.from_email)
+
     def test_personalization_filters_out_duplicate_cc_emails(self):
         self.maxDiff = None
 

use_cases/README.md

@@ -8,6 +8,7 @@ This directory provides examples for specific use cases of this library. Please
 * [Send a Single Email to a Single Recipient](send_a_single_email_to_a_single_recipient.md)
 * [Send a Single Email to Multiple Recipients](send_a_single_email_to_multiple_recipients.md)
 * [Send Multiple Emails to Multiple Recipients](send_multiple_emails_to_multiple_recipients.md)
+* [Send Multiple Emails with Personalizations](send_multiple_emails_personalizations.md)
 * [Kitchen Sink - an example with all settings used](kitchen_sink.md)
 * [Transactional Templates](transactional_templates.md)
 * [Attachments](attachment.md)

use_cases/send_multiple_emails_personalizations.md

@@ -0,0 +1,32 @@
+```python
+import os
+import json
+from sendgrid import SendGridAPIClient
+from sendgrid.helpers.mail import Mail, Personalization, From, To, Cc, Bcc
+
+# Note that the domain for all From email addresses must match
+message = Mail(
+    from_email=('from@example.com', 'Example From Name'),
+    subject='Sending with Twilio SendGrid is Fun',
+    html_content='<strong>and easy to do anywhere, even with Python</strong>')
+
+personalization1 = Personalization()
+personalization1.add_email(To('test0@example.com', 'Example Name 0'))
+personalization1.add_email(Cc('test1@example.com', 'Example Name 1'))
+message.add_personalization(personalization1)
+
+personalization2 = Personalization()
+personalization2.add_email(To('test2@example.com', 'Example Name 2'))
+personalization2.add_email(Bcc('test3@example.com', 'Example Name 3'))
+personalization2.add_email(From('from2@example.com', 'Example From Name 2'))
+message.add_personalization(personalization2)
+
+try:
+    sendgrid_client = SendGridAPIClient(os.environ.get('SENDGRID_API_KEY'))
+    response = sendgrid_client.send(message)
+    print(response.status_code)
+    print(response.body)
+    print(response.headers)
+except Exception as e:
+    print(e.message)
+```