Feature/likes and views

projects/managers.py

@@ -42,17 +42,21 @@ def get_projects_for_list_view(self):
         )
 
     def get_user_projects_for_list_view(self):
-        return self.get_queryset().prefetch_related(
-            Prefetch(
-                "industry",
-                queryset=Industry.objects.only("name").all(),
-            ),
-            Prefetch(
-                "leader",
-                queryset=CustomUser.objects.only("id").all(),
-            ),
-            Prefetch("collaborator_set"),
-        ).distinct()
+        return (
+            self.get_queryset()
+            .prefetch_related(
+                Prefetch(
+                    "industry",
+                    queryset=Industry.objects.only("name").all(),
+                ),
+                Prefetch(
+                    "leader",
+                    queryset=CustomUser.objects.only("id").all(),
+                ),
+                Prefetch("collaborator_set"),
+            )
+            .distinct()
+        )
 
     def get_projects_for_detail_view(self):
         return (
@@ -66,6 +70,9 @@ def check_if_owns_any_projects(self, user) -> bool:
         # I don't think this should work but the function has no usages, so I'll let it be
         return user.leader_projects.exists()
 
+    def get_projects_from_list_of_ids(self, ids):
+        return self.get_queryset().filter(id__in=ids)
+
 
 class AchievementManager(Manager):
     def get_achievements_for_list_view(self):

projects/migrations/0010_project_views_count.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.3 on 2023-01-21 14:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projects", "0009_remove_project_short_description"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="project",
+            name="views_count",
+            field=models.PositiveIntegerField(default=0),
+        ),
+    ]

projects/models.py

@@ -65,6 +65,12 @@ class Project(models.Model):
 
     objects = ProjectManager()
 
+    views_count = models.PositiveIntegerField(default=0)
+
+    def increment_views_count(self):
+        self.views_count += 1
+        self.save()
+
     def get_short_description(self) -> Optional[str]:
         return self.description[:90] if self.description else None
 

projects/serializers.py

@@ -4,6 +4,7 @@
 from industries.models import Industry
 from projects.models import Project, Achievement, Collaborator
 from projects.validators import validate_project
+from users.models import LikesOnProject
 from vacancy.serializers import ProjectVacancyListSerializer
 
 
@@ -65,6 +66,7 @@ class ProjectDetailSerializer(serializers.ModelSerializer):
     vacancies = ProjectVacancyListSerializer(many=True, read_only=True)
     short_description = serializers.SerializerMethodField()
     industry_id = serializers.IntegerField(required=False)
+    likes_count = serializers.SerializerMethodField(method_name="count_likes")
 
     def validate(self, data):
         super().validate(data)
@@ -74,6 +76,9 @@ def validate(self, data):
     def get_short_description(cls, project):
         return project.get_short_description()
 
+    def count_likes(self, project):
+        return LikesOnProject.objects.filter(project=project, is_liked=True).count()
+
     def update(self, instance, validated_data):
         instance = super().update(instance, validated_data)
         instance.save()
@@ -99,12 +104,20 @@ class Meta:
             "vacancies",
             "datetime_created",
             "datetime_updated",
+            "views_count",
+            "likes_count",
+        ]
+        read_only_fields = [
+            "leader",
+            "views_count",
+            "datetime_created",
+            "datetime_updated",
         ]
-        read_only_fields = ["leader"]
 
 
 class ProjectListSerializer(serializers.ModelSerializer):
     collaborators = serializers.SerializerMethodField(method_name="get_collaborators")
+    likes_count = serializers.SerializerMethodField(method_name="count_likes")
     collaborator_count = serializers.SerializerMethodField(
         method_name="get_collaborator_count"
     )
@@ -120,6 +133,9 @@ def get_short_description(cls, project):
     def get_collaborator_count(cls, obj):
         return len(obj.collaborator_set.all())
 
+    def count_likes(self, obj):
+        return LikesOnProject.objects.filter(project=obj, is_liked=True).count()
+
     def get_collaborators(self, obj):
         max_collaborator_count = 4
         return CollaboratorSerializer(
@@ -142,6 +158,7 @@ class Meta:
             "collaborators",
             "vacancies",
             "datetime_created",
+            "likes_count",
         ]
 
         read_only_fields = [

projects/urls.py

@@ -9,12 +9,14 @@
     ProjectCollaborators,
     ProjectCountView,
     ProjectVacancyResponses,
+    SetLikeOnProject,
 )
 
 app_name = "projects"
 
 urlpatterns = [
     path("", ProjectList.as_view()),
+    path("<int:pk>/like/", SetLikeOnProject.as_view()),
     path("<int:pk>/collaborators/", ProjectCollaborators.as_view()),
     path("<int:pk>/", ProjectDetail.as_view()),
     path("count/", ProjectCountView.as_view()),

projects/views.py

@@ -20,6 +20,7 @@
     AchievementDetailSerializer,
     ProjectCollaboratorSerializer,
 )
+from users.models import LikesOnProject
 from vacancy.models import VacancyResponse
 from vacancy.serializers import VacancyResponseListSerializer
 
@@ -79,6 +80,12 @@ class ProjectDetail(generics.RetrieveUpdateDestroyAPIView):
     permission_classes = [HasInvolvementInProjectOrReadOnly]
     serializer_class = ProjectDetailSerializer
 
+    def retrieve(self, request, *args, **kwargs):
+        instance = self.get_object()
+        instance.increment_views_count()
+        serializer = self.get_serializer(instance)
+        return Response(serializer.data)
+
     def put(self, request, pk, **kwargs):
         # bootleg version of updating achievements via project
         if request.data.get("achievements") is not None:
@@ -100,6 +107,29 @@ def put(self, request, pk, **kwargs):
         return super(ProjectDetail, self).put(request, pk)
 
 
+class SetLikeOnProject(APIView):
+    permission_classes = [IsAuthenticated]
+
+    def post(self, request, pk):
+        """
+        Set like on project
+
+        ---
+
+        Args:
+            request:
+            pk - project id
+
+        Returns:
+            Response
+
+        """
+        project = Project.objects.get(pk=pk)
+        LikesOnProject.objects.toggle_like(request.user, project)
+
+        return Response(ProjectListSerializer(project).data)
+
+
 class ProjectCountView(generics.GenericAPIView):
     queryset = Project.objects.get_projects_for_count_view()
     serializer_class = ProjectListSerializer

users/managers.py

@@ -60,3 +60,21 @@ def get_achievements_for_detail_view(self):
             .select_related("user")
             .only("id", "title", "status", "user")
         )
+
+
+class LikesOnProjectManager(Manager):
+    def get_likes_for_list_view(self):
+        return (
+            self.get_queryset()
+            .select_related("user")
+            .only("id", "user__id", "project__id")
+        )
+
+    def get_or_create(self, user, project):
+        return super().get_or_create(user=user, project=project)
+
+    def toggle_like(self, user, project):
+        like, created = self.get_or_create(user=user, project=project)
+        if not created:
+            like.toggle_like()
+        return like

users/migrations/0027_likesonproject.py

@@ -0,0 +1,52 @@
+# Generated by Django 4.1.3 on 2023-01-21 14:45
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projects", "0010_project_views_count"),
+        ("users", "0026_remove_member_preferred_industries_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="LikesOnProject",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("like", models.BooleanField(default=True)),
+                (
+                    "project",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="likes",
+                        to="projects.project",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="likes_on_projects",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Лайк на проект",
+                "verbose_name_plural": "Лайки на проекты",
+                "unique_together": {("user", "project")},
+            },
+        ),
+    ]

users/migrations/0028_rename_like_likesonproject_is_liked.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.3 on 2023-01-21 18:29
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("users", "0027_likesonproject"),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name="likesonproject",
+            old_name="like",
+            new_name="is_liked",
+        ),
+    ]

users/models.py

@@ -12,7 +12,11 @@
     VERBOSE_ROLE_TYPES,
     VERBOSE_USER_TYPES,
 )
-from users.managers import CustomUserManager, UserAchievementManager
+from users.managers import (
+    CustomUserManager,
+    UserAchievementManager,
+    LikesOnProjectManager,
+)
 from users.validators import user_birthday_validator
 
 
@@ -151,6 +155,45 @@ class Meta:
         abstract = True
 
 
+class LikesOnProject(models.Model):
+    """
+    LikesOnProject model
+
+    This model is used to store the user's likes on projects.
+
+    Attributes:
+        user: ForeignKey instance of user.
+        project: ForeignKey instance of project.
+    """
+
+    is_liked = models.BooleanField(default=True)
+
+    user = models.ForeignKey(
+        CustomUser,
+        on_delete=models.CASCADE,
+        related_name="likes_on_projects",
+    )
+    project = models.ForeignKey(
+        "projects.Project",
+        on_delete=models.CASCADE,
+        related_name="likes",
+    )
+
+    objects = LikesOnProjectManager()
+
+    def toggle_like(self):
+        self.is_liked = not self.is_liked
+        self.save()
+
+    def __str__(self):
+        return f"LikesOnProject<{self.id}>"
+
+    class Meta:
+        verbose_name = "Лайк на проект"
+        verbose_name_plural = "Лайки на проекты"
+        unique_together = ("user", "project")
+
+
 class Member(models.Model):
     """
     Member model

users/urls.py

@@ -14,6 +14,7 @@
     UserTypesView,
     VerifyEmail,
     LogoutView,
+    LikedProjectList,
 )
 
 app_name = "users"
@@ -24,6 +25,7 @@
     ),  # this url actually returns  mentors, experts and investors
     path("users/", UserList.as_view()),
     path("users/projects/", UserProjectsList.as_view()),
+    path("users/liked/", LikedProjectList.as_view()),
     path("users/roles/", UserAdditionalRolesView.as_view()),
     path("users/types/", UserTypesView.as_view()),
     path("users/<int:pk>/", UserDetail.as_view()),