feat(push notification):send notification

 - add follow model for user follower
 - add notification app
 - add notifications on installed apps
 - add notifications view

[finishes #161254670]

.travis.yml

@@ -20,6 +20,8 @@ script:
   - python3 manage.py migrate profiles
   - python3 manage.py makemigrations article
   - python3 manage.py migrate article
+  - python3 manage.py makemigrations notifications
+  - python3 manage.py migrate notifications
   - python3 manage.py makemigrations report
   - python3 manage.py migrate report
   - python3 manage.py makemigrations

authors/apps/article/likes_dislike_views.py

@@ -2,13 +2,16 @@
 from rest_framework.views import APIView
 from rest_framework.response import Response
 from rest_framework import status
+from ..authentication.renderers import UserJSONRenderer
 from rest_framework.permissions import IsAuthenticated
-
 from authors.apps.article.renderers import FavoriteJSONRenderer
 from authors.apps.article.serializers import FavoriteSerializer,\
     ArticleSerializer
+from .serializers import RateArticleSerializer
+from .models import RateArticle
 from .models import (Article,
                      LikeDislikeArticle, Favorite)
+from rest_framework.generics import CreateAPIView
 
 
 LOOKUP_FIELD = 'slug'
@@ -141,7 +144,7 @@ def post(self, request, **kwargs):
             return Response(
                 {"response": disliked_article_response},
                 status=status.HTTP_200_OK)
-        except Exception as e:
+        except Exception:
             LikeDislikeArticle(
                 liker=disliker,
                 article=disliked_article,
@@ -151,6 +154,39 @@ def post(self, request, **kwargs):
                 status=status.HTTP_200_OK)
 
 
+class Rate(CreateAPIView):
+    permission_classes = (IsAuthenticated,)
+    renderer_classes = (UserJSONRenderer,)
+    serializer_class = RateArticleSerializer
+
+    def post(self, request, **kwargs):
+        """
+        rate user view
+        """
+        data = request.data.get('user', {})
+        serializer = self.serializer_class(data=data)
+        serializer.validate(data=data)
+        serializer.is_valid(raise_exception=True)
+        rate_article = None
+        try:
+            article = Article.objects.get(slug=data['slug'])
+        except Exception:
+            return Response({"response": "Article not found"},
+                            status=status.HTTP_204_NO_CONTENT)
+        rater = request.user
+        try:
+            rate_article = RateArticle.objects.get(
+                rater=rater, article=article)
+            rate_article.rate = data["rate"]
+            rate_article.save()
+            return Response({"response": "successfully rated"},
+                            status=status.HTTP_200_OK)
+        except Exception:
+            RateArticle(
+                rater=rater, article=article, rate=data["rate"]).save()
+            return Response(data={"response": "sucessfully rated"},
+                            status=status.HTTP_200_OK)
+
 class FavoriteAPIView(APIView):
     serializer_class = FavoriteSerializer
     permission_classes = (IsAuthenticated,)

authors/apps/article/send_notifiactions.py

@@ -0,0 +1,69 @@
+from ..profiles.models import UserProfile, Follow
+from django.template.loader import render_to_string
+from django.core.mail import send_mail
+from .models import Article, Favorite
+from authors.settings import DEFAULT_DOMAIN, EMAIL_HOST_USER
+
+from ..notifications.models import NotificationsFollower, NotificationsArticle
+
+
+def send_article_notification(slug, data, request):
+    """
+    send email to article favourites
+    """
+    try:
+        article = Article.objects.get(slug=slug)
+        subscribers = Favorite.objects.filter(article=article)
+        for subscriber in subscribers:
+            message = request.user.username + " commented on this article "
+            link = DEFAULT_DOMAIN + '/api/article/detail/' + \
+                article.slug
+            msg = render_to_string('article_alert.html', {
+                'user': subscriber.user.username,
+                "link": link,
+                "message": message,
+                "comment": data["body"]
+            })
+            send_mail('Authors Heaven New Article!',
+                      'New Comment!!!!',
+                      EMAIL_HOST_USER,
+                      [subscriber.user.email],
+                      html_message=msg,
+                      fail_silently=False)
+            NotificationsArticle(
+                subscriber_id=subscriber.pk,
+                article_id=article.pk).save()
+    except Exception as error:
+        print(str(error))
+
+
+def send_followers_notification(instance, request, user):
+    """
+    send email to user following the author
+    """
+    try:
+        profile = UserProfile.objects.get(user=user)
+        followers = Follow.objects.filter(follower=profile)
+        article = Article.objects.get(title=instance["title"])
+        for follower in followers:
+            message = article.user.username + " published new article "
+            link = DEFAULT_DOMAIN + '/api/article/detail/' + \
+                article.slug
+            follower_message = render_to_string('followee_alert.html', {
+                'user': follower.followee.user.username,
+                "link": link,
+                "message": message,
+                "title": instance["title"]
+            })
+            send_mail('Authors Heaven New Article!',
+                      'New Article!!!!',
+                      EMAIL_HOST_USER,
+                      [follower.followee.user.email],
+                      html_message=follower_message,
+                      fail_silently=False)
+            NotificationsFollower(
+                follower=profile,
+                followee=follower.followee,
+                article=article).save()
+    except Exception as error:
+        print(str(error))

authors/apps/article/serializers.py

@@ -4,15 +4,13 @@
 native Python datatypes that can then
 be easily rendered into JSON, XML or other content types.'''
 import math
-
 from rest_framework import serializers
 from django.apps import apps
 from rest_framework.validators import UniqueTogetherValidator
-
-from authors.apps.profiles.models import UserProfile
-
 from .models import RateArticle, Comments, CommentHistory, Favorite
 from authors.apps.profiles.serializers import ProfileListSerializer
+from authors.apps.profiles.models import UserProfile
+
 
 TABLE = apps.get_model('article', 'Article')
 Profile = apps.get_model('profiles', 'UserProfile')
@@ -137,7 +135,9 @@ def get_time_to_read(self, body, images):
         image_view_time = 0
         if images:
             image_view_time = (len(images) * 0.25)
-        time_taken = math.ceil((len(list(body)) / 250) + image_view_time)
+        time_taken = 0
+        if body:
+            time_taken = math.ceil((len(list(body)) / 250) + image_view_time)
         if time_taken <= 1:
             return str(time_taken) + 'min'
         return str(time_taken) + 'mins'
@@ -146,7 +146,7 @@ def create(self, validated_data):
         instance = TABLE.objects.create(**validated_data)
         validated_data['slug'] = instance.slug
         validated_data['time_to_read'] = self.get_time_to_read(
-            instance.body, validated_data.get('images'),)
+            instance.body, validated_data.get('images'))
 
         return validated_data
 

authors/apps/article/templates/article_alert.html

@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style>
+.card {
+ box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
+ max-width: 600px;
+ margin: auto;
+ text-align: center;
+ font-family: arial;
+}
+
+.title {
+ color: grey;
+ font-size: 13px;
+ text-align: left;
+}
+
+button {
+ border: none;
+ outline: 0;
+ display: inline-block;
+ padding: 8px;
+ color: #000;;
+ background-color: #000;
+ text-align: center;
+ cursor: pointer;
+ width: 100%;
+ font-size: 18px;
+}
+
+a {
+ text-decoration: none;
+ font-size: 13px;
+ color: black;
+}
+
+button:hover, a:hover {
+ opacity: 0.7;
+}
+</style>
+</head>
+<body>
+
+<div class="card">
+    <p class="title">
+    Hi {{user}},<br></p>
+    <p class="title"> New Comment!!!! <a href={{ENVIRONMENT}}>
+    Authors Heaven</a>, the platform for
+    people with expressive ideas.</p>
+    <p class="title">{{message}}<a href={{link}}> {{comment}} </a>view it on Authors Haven</p>
+    <p><button></button>Authors Heavens. All Rights Reserved</p>
+</div>
+
+</body>
+</html>

authors/apps/article/templates/followee_alert.html

@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style>
+.card {
+ box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
+ max-width: 600px;
+ margin: auto;
+ text-align: center;
+ font-family: arial;
+}
+
+.title {
+ color: grey;
+ font-size: 13px;
+ text-align: left;
+}
+
+button {
+ border: none;
+ outline: 0;
+ display: inline-block;
+ padding: 8px;
+ color: #000;;
+ background-color: #000;
+ text-align: center;
+ cursor: pointer;
+ width: 100%;
+ font-size: 18px;
+}
+
+a {
+ text-decoration: none;
+ font-size: 13px;
+ color: black;
+}
+
+button:hover, a:hover {
+ opacity: 0.7;
+}
+</style>
+</head>
+<body>
+
+<div class="card">
+    <p class="title">
+    Hi {{user}},<br></p>
+    <p class="title"> New Article!!!! <a href={{ENVIRONMENT}}>
+    Authors Heaven</a>, the platform for
+    people with expressive ideas.</p>
+    <p class="title">{{message}}<a href={{link}}> {{title}} </a>view it on Authors Haven</p>
+    <p><button></button>Authors Heavens. All Rights Reserved</p>
+</div>
+
+</body>
+</html>

authors/apps/article/tests/base_like_test.py

@@ -44,7 +44,7 @@ def setUp(self):
         self.email = "test_user@gmail.com"
         self.name = "test"
         self.user = User(username=self.name, email=self.email)
-        self.user.set_password("@Winners11")
+        self.user.set_password("@Winffners11")
         self.user.save()
         self.user_id = User.objects.get(email=self.email).pk
         self.slug = "this-is-a-question"
@@ -78,3 +78,8 @@ def setUp(self):
         self.view_likes_url = os.environ["URL"] + "api/article/rate/"
         self.articles_url = os.environ["URL"] + "api/article/"
         self.create_articles_url = os.environ["URL"] + "api/article/create"
+        self.get_notifications = os.environ["URL"] + "api/notifications"
+        self.edit_notifications = os.environ["URL"] + "api/notifications" +\
+            "1" + "follower"
+        self.edit_notifications_2 = os.environ["URL"] + "api/notifications" +\
+            "1" + "unfollower"

authors/apps/article/urls.py

@@ -6,15 +6,15 @@
     ArticleDeleteAPIView,
     ArticleDetailAPIView,
     ArticleUpdateAPIView,
-    Rate,
     ArticleRate,
     CommentsListCreateView,
     CommentsUpdateDeleteAPIView,
     ArticleTags, CommentHistoryAPIView)
 from .likes_dislike_views import (
     Like,
     Dislike,
-    FavoriteAPIView
+    FavoriteAPIView,
+    Rate
 )
 
 schema_view = get_swagger_view(title="Article Comments")