Implement Notification Framework with Initial Email Support

JIRA: None

Notification/notifier objects are now created with title,
content, sender, associated resource, and recipient and there is
now support for emails at the very least to be sent as notifications.

Change-Id: I456cf0e901d9a1e2a1e7d187dcc03d28fca003fb
Signed-off-by: Sawyer Bergeron <sbergeron@iol.unh.edu>

7 files changed, 131 insertions, 0 deletions

diff --git a/src/notifier/__init__.py b/src/notifier/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/notifier/__init__.py
diff --git a/src/notifier/admin.py b/src/notifier/admin.py
new file mode 100644
index 0000000..cfbe778
--- /dev/null
+++ b/src/notifier/admin.py
@@ -0,0 +1,14 @@
+##############################################################################
+# Copyright (c) 2016 Max Breitenfeldt and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from django.contrib import admin
+
+from notifier.models import *
+
+admin.site.register(Notifier)
diff --git a/src/notifier/apps.py b/src/notifier/apps.py
new file mode 100644
index 0000000..da5d3b0
--- /dev/null
+++ b/src/notifier/apps.py
@@ -0,0 +1,14 @@
+##############################################################################
+# Copyright (c) 2016 Max Breitenfeldt and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from django.apps import AppConfig
+
+
+class NotifierConfig(AppConfig):
+    name = 'notifier'
diff --git a/src/notifier/dispatchers.py b/src/notifier/dispatchers.py
new file mode 100644
index 0000000..64be2a5
--- /dev/null
+++ b/src/notifier/dispatchers.py
@@ -0,0 +1,34 @@
+##############################################################################
+# Copyright (c) 2016 Max Breitenfeldt and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+from django.contrib import messages
+from django.core.mail import send_mail
+
+class DispatchHandler():
+
+    @receiver(pre_save, sender='notifier.Notifier')
+    def dispatch(sender, instance, *args, **kwargs):
+        try:
+            msg_type = getattr(DispatchHandler, instance.message_type)
+            msg_type(instance)
+        except AttributeError:
+            instance.msg_sent = 'no dispatcher by given name exists: sending by email'
+            email(instance)
+
+    def email(instance):
+        if instance.msg_sent != 'no dispatcher by given name exists: sending by email':
+            instance.msg_sent = 'by email'
+        send_mail(instance.title,instance.content + 
+            '\n\n This message pertains to the following resource: ' + 
+            instance.resource.name,instance.sender,[instance.user.email_addr], fail_silently=False)
+
+    def webnotification(instance):
+        instance.msg_sent='by web notification'
diff --git a/src/notifier/migrations/0001_initial.py b/src/notifier/migrations/0001_initial.py
new file mode 100644
index 0000000..78d2bad
--- /dev/null
+++ b/src/notifier/migrations/0001_initial.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10 on 2017-12-14 21:41
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+import fernet_fields.fields
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('account', '0002_userprofile_email_addr'),
+        ('dashboard', '0002_auto_20170505_0815'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Notifier',
+            fields=[
+                ('id', models.AutoField(primary_key=True, serialize=False)),
+                ('title', models.CharField(max_length=240)),
+                ('content', fernet_fields.fields.EncryptedTextField()),
+                ('sender', models.CharField(default='unknown', max_length=240)),
+                ('message_type', models.CharField(choices=[('email', 'Email'), ('webnotification', 'Web Notification')], default='email', max_length=240)),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='account.UserProfile')),
+            ],
+        ),
+    ]
diff --git a/src/notifier/migrations/__init__.py b/src/notifier/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/notifier/migrations/__init__.py
diff --git a/src/notifier/models.py b/src/notifier/models.py
new file mode 100644
index 0000000..9ebc6fc
--- /dev/null
+++ b/src/notifier/models.py
@@ -0,0 +1,38 @@
+##############################################################################
+# Copyright (c) 2016 Max Breitenfeldt and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from django.db import models
+from jira import JIRA, JIRAError
+from dashboard.models import Resource
+from booking.models import Booking
+from django.contrib.auth.models import User
+from account.models import UserProfile
+from django.contrib import messages
+from django.db.models.signals import pre_save
+from fernet_fields import EncryptedTextField
+
+class Notifier(models.Model):
+    id = models.AutoField(primary_key=True)
+    title = models.CharField(max_length=240)
+    content = EncryptedTextField()
+    user = models.ForeignKey(UserProfile, on_delete=models.CASCADE, null=True, blank=True)
+    sender = models.CharField(max_length=240, default='unknown')
+    message_type = models.CharField(max_length=240, default='email', choices=(
+        ('email','Email'), 
+        ('webnotification', 'Web Notification')))
+    msg_sent = ''
+
+    import notifier.dispatchers
+
+    def __str__(self):
+        return self.title
+
+    def getEmail(self):
+        return self.user.email_addr
+