From bfe40e4cb658252b51fbcc713d7e1afa77a7030b Mon Sep 17 00:00:00 2001
From: Amit Upreti <a.u.aua937@gmail.com>
Date: Fri, 10 Mar 2023 14:31:55 -0500
Subject: [PATCH] send email to host,cohost

Whenever a host adds or removes a cohost to the event, email notification are sent to a) host and b) the added/removed cohost
---
 physionet-django/events/views.py         | 16 +++++++---
 physionet-django/notification/utility.py | 39 ++++++++++++++++++++++++
 2 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/physionet-django/events/views.py b/physionet-django/events/views.py
index 4d40d49ce8..75a89c2d5c 100644
--- a/physionet-django/events/views.py
+++ b/physionet-django/events/views.py
@@ -262,8 +262,12 @@ def manage_co_hosts(request):
                 return JsonResponse({'error': 'User is not a cohost of this event'}, status=403)
             participant.is_cohost = False
             participant.save()
-
-            # placeholder for notification to cohost that they have been removed and to host that they removed a cohost
+            # notify the cohost that their cohost permission has been removed
+            notification.notify_event_cohost_cohost_status_change(request=request, cohost=participant.user, event=event,
+                                                                  status='Remove cohost')
+            # notify the host that they have removed a cohost
+            notification.notify_event_host_cohost_status_change(request=request, cohost=participant.user, event=event,
+                                                                status='Remove cohost')
 
             return JsonResponse({'success': 'Cohost removed successfully'})
         elif 'Make cohost' in request.POST.get('submit'):
@@ -271,8 +275,12 @@ def manage_co_hosts(request):
                 return JsonResponse({'error': 'User is already a cohost of this event'}, status=403)
             participant.is_cohost = True
             participant.save()
-
-            # placeholder for notification to cohost that they have been added and to host that they added a cohost
+            # notify the cohost that they have been added as a cohost for the event
+            notification.notify_event_cohost_cohost_status_change(request=request, cohost=participant.user, event=event,
+                                                                  status='Make cohost')
+            # notify the host that they have added a cohost for the event
+            notification.notify_event_host_cohost_status_change(request=request, cohost=participant.user, event=event,
+                                                                status='Make cohost')
 
             return JsonResponse({'success': 'Cohost added successfully'})
 
diff --git a/physionet-django/notification/utility.py b/physionet-django/notification/utility.py
index a2b2ceee22..efe6cebfb7 100644
--- a/physionet-django/notification/utility.py
+++ b/physionet-django/notification/utility.py
@@ -985,6 +985,45 @@ def notify_participant_event_decision(request, user, event, decision, comment_to
     send_mail(subject, body, settings.DEFAULT_FROM_EMAIL, [user.email], fail_silently=False)
 
 
+def notify_event_cohost_cohost_status_change(request, cohost, event, status='Make cohost'):
+    """
+    Send email to co-host about their cohost status change for the event.
+    """
+    subject = f"{settings.SITE_NAME} Event Cohost Status Change"
+    context = {
+        'name': cohost.get_full_name(),
+        'domain': get_current_site(request),
+        'url_prefix': get_url_prefix(request),
+        'event_title': event.title,
+        'event_url': reverse('event_detail', args=[event.slug]),
+        'status': status,
+        'SITE_NAME': settings.SITE_NAME,
+    }
+    body = loader.render_to_string('events/email/event_cohost_cohost_status_change.html', context)
+    # Not resend the email if there was an integrity error
+    send_mail(subject, body, settings.DEFAULT_FROM_EMAIL, [cohost.email], fail_silently=False)
+
+
+def notify_event_host_cohost_status_change(request, cohost, event, status='Make cohost'):
+    """
+    Send email to host about cohost status change for the event.
+    """
+    subject = f"{settings.SITE_NAME} Event Cohost Status Change"
+    context = {
+        'host_name': event.host.get_full_name(),
+        'cohost_name': cohost.get_full_name(),
+        'domain': get_current_site(request),
+        'url_prefix': get_url_prefix(request),
+        'event_title': event.title,
+        'event_url': reverse('event_detail', args=[event.slug]),
+        'status': status,
+        'SITE_NAME': settings.SITE_NAME,
+    }
+    body = loader.render_to_string('events/email/event_host_cohost_status_change.html', context)
+    # Not resend the email if there was an integrity error
+    send_mail(subject, body, settings.DEFAULT_FROM_EMAIL, [cohost.email], fail_silently=False)
+
+
 def notify_event_participant_application(request, user, registered_user, event):
     """
     Send email to host and co-host about new registration request on event.