Use PDF link renderer to preview letters

Depends on and implements:
- [x] https://github.com/alphagov/notifications-utils/pull/84
- [ ] https://github.com/alphagov/notifications-utils/pull/86

app/main/views/send.py

@@ -20,6 +20,7 @@ from flask_login import login_required, current_user
 from notifications_utils.columns import Columns
 from notifications_utils.template import Template
 from notifications_utils.recipients import RecipientCSV, first_column_headings, validate_and_format_phone_number
+from notifications_utils.renderers import EmailPreview, SMSPreview, LetterPDFLink
 
 from app.main import main
 from app.main.forms import CsvUploadForm, ChooseTimeForm, get_next_days_until, get_furthest_possible_scheduled_time

app/utils.py

@@ -8,7 +8,7 @@ import unicodedata
 from flask import (abort, current_app, session, request, redirect, url_for)
 from flask_login import current_user
 
-from notifications_utils.renderers import SMSPreview, EmailPreview, LetterPreview
+from notifications_utils.renderers import SMSPreview, EmailPreview, LetterPDFLink
 
 import pyexcel
 import pyexcel.ext.io
@@ -233,5 +233,5 @@ def get_renderer(template_type, service, show_recipient, expand_emails=False):
             sender=service['sms_sender'],
             show_recipient=show_recipient
         ),
-        'letter': LetterPreview(),
+        'letter': LetterPDFLink(service['id']),
     }[template_type]

requirements.txt

@@ -22,4 +22,4 @@ wand==0.4.4
 
 git+https://github.com/alphagov/notifications-python-client.git@3.0.1#egg=notifications-python-client==3.0.1
 
-git+https://github.com/alphagov/notifications-utils.git@11.0.2#egg=notifications-utils==11.0.2
+git+https://github.com/alphagov/notifications-utils.git@11.1.0#egg=notifications-utils==11.1.0