Merge pull request #2344 from alphagov/html-response

Return rendered HTML when previewing a template

app/utils.py

@@ -3,7 +3,7 @@ from datetime import datetime, timedelta
 import pytz
 from flask import url_for
 from sqlalchemy import func
-from notifications_utils.template import SMSMessageTemplate, WithSubjectTemplate
+from notifications_utils.template import SMSMessageTemplate, WithSubjectTemplate, get_html_email_body
 from notifications_utils.timezones import convert_utc_to_bst
 
 local_timezone = pytz.timezone("Europe/London")
@@ -35,6 +35,18 @@ def get_template_instance(template, values):
     }[template['template_type']](template, values)
 
 
+def get_html_email_body_from_template(template_instance):
+    from app.models import EMAIL_TYPE
+
+    if template_instance.template_type != EMAIL_TYPE:
+        return None
+
+    return get_html_email_body(
+        template_instance.content,
+        template_instance.values,
+    )
+
+
 def get_london_midnight_in_utc(date):
     """
      This function converts date to midnight as BST (British Standard Time) to UTC,

app/v2/template/template_schemas.py

@@ -1,5 +1,6 @@
 from app.models import SMS_TYPE, TEMPLATE_TYPES
 from app.schema_validation.definitions import uuid, personalisation
+from app.utils import get_html_email_body_from_template
 
 
 get_template_by_id_request = {
@@ -65,9 +66,11 @@ post_template_preview_response = {
         "version": {"type": "integer"},
         "body": {"type": "string"},
         "subject": {"type": ["string", "null"]},
-        "postage": {"type": "string"}
+        "postage": {"type": "string"},
+        "html": {"type": ["string", "null"]},
     },
-    "required": ["id", "type", "version", "body"]
+    "required": ["id", "type", "version", "body"],
+    "additionalProperties": False,
 }
 
 
@@ -79,6 +82,7 @@ def create_post_template_preview_response(template, template_object):
         "type": template.template_type,
         "version": template.version,
         "body": str(template_object),
+        "html": get_html_email_body_from_template(template_object),
         "subject": subject,
         "postage": template.postage
     }

tests/app/v2/template/test_post_template.py

@@ -2,7 +2,7 @@ import pytest
 
 from flask import json
 
-from app.models import SMS_TYPE, TEMPLATE_TYPES
+from app.models import EMAIL_TYPE, SMS_TYPE, TEMPLATE_TYPES
 from tests import create_authorization_header
 from tests.app.db import create_template
 
@@ -16,36 +16,68 @@ valid_post = [
         "Some content",
         None,
         "Some subject",
-        "Some content"
+        "Some content",
+        (
+            '<p style="Margin: 0 0 20px 0; font-size: 19px; line-height: 25px; color: #0B0C0C;">'
+            'Some content'
+            '</p>'
+        ),
     ),
     (
         "Some subject",
         "Dear ((Name)), Hello. Yours Truly, The Government.",
         valid_personalisation,
         "Some subject",
-        "Dear Jo, Hello. Yours Truly, The Government."
+        "Dear Jo, Hello. Yours Truly, The Government.",
+        (
+            '<p style="Margin: 0 0 20px 0; font-size: 19px; line-height: 25px; color: #0B0C0C;">'
+            'Dear Jo, Hello. Yours Truly, The Government.'
+            '</p>'
+        ),
     ),
     (
         "Message for ((Name))",
         "Dear ((Name)), Hello. Yours Truly, The Government.",
         valid_personalisation,
         "Message for Jo",
-        "Dear Jo, Hello. Yours Truly, The Government."
+        "Dear Jo, Hello. Yours Truly, The Government.",
+        (
+            '<p style="Margin: 0 0 20px 0; font-size: 19px; line-height: 25px; color: #0B0C0C;">'
+            'Dear Jo, Hello. Yours Truly, The Government.'
+            '</p>'
+        ),
     ),
     (
         "Message for ((Name))",
         "Some content",
         valid_personalisation,
         "Message for Jo",
-        "Some content"
+        "Some content",
+        (
+            '<p style="Margin: 0 0 20px 0; font-size: 19px; line-height: 25px; color: #0B0C0C;">'
+            'Some content'
+            '</p>'
+        ),
     ),
 ]
 
 
 @pytest.mark.parametrize("tmp_type", TEMPLATE_TYPES)
-@pytest.mark.parametrize("subject,content,post_data,expected_subject,expected_content", valid_post)
+@pytest.mark.parametrize(
+    "subject,content,post_data,expected_subject,expected_content,expected_html",
+    valid_post
+)
 def test_valid_post_template_returns_200(
-        client, sample_service, tmp_type, subject, content, post_data, expected_subject, expected_content):
+    client,
+    sample_service,
+    tmp_type,
+    subject,
+    content,
+    post_data,
+    expected_subject,
+    expected_content,
+    expected_html,
+):
     template = create_template(
         sample_service,
         template_type=tmp_type,
@@ -64,8 +96,15 @@ def test_valid_post_template_returns_200(
     resp_json = json.loads(response.get_data(as_text=True))
 
     assert resp_json['id'] == str(template.id)
+
     if tmp_type != SMS_TYPE:
         assert expected_subject in resp_json['subject']
+
+    if tmp_type == EMAIL_TYPE:
+        assert resp_json['html'] == expected_html
+    else:
+        assert resp_json['html'] is None
+
     assert expected_content in resp_json['body']
 
 

tests/app/v2/template/test_template_schemas.py

@@ -71,17 +71,16 @@ valid_json_post_response = {
     'id': str(uuid.uuid4()),
     'type': 'email',
     'version': 1,
-    'created_by': 'someone@test.com',
-    'body': 'some body'
+    'body': 'some body',
 }
 
 valid_json_post_response_with_optionals = {
     'id': str(uuid.uuid4()),
     'type': 'email',
     'version': 1,
-    'created_by': 'someone@test.com',
     'body': "some body",
-    'subject': 'some subject'
+    'subject': 'some subject',
+    'html': '<p>some body</p>',
 }