Projects news

core/admin.py

@@ -0,0 +1,14 @@
+from django.contrib import admin
+from core.models import Like, View
+
+
+@admin.register(Like)
+class LikeAdmin(admin.ModelAdmin):
+    list_display = ("id", "user", "content_type", "object_id", "content_object")
+    list_display_links = ("id", "user", "content_type", "object_id", "content_object")
+
+
+@admin.register(View)
+class ViewAdmin(admin.ModelAdmin):
+    list_display = ("id", "user", "content_type", "object_id", "content_object")
+    list_display_links = ("id", "user", "content_type", "object_id", "content_object")

core/migrations/0001_initial.py

@@ -0,0 +1,54 @@
+# Generated by Django 4.2 on 2023-06-08 20:05
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("contenttypes", "0002_remove_content_type_name"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Like",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("object_id", models.PositiveIntegerField()),
+                (
+                    "content_type",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="likes",
+                        to="contenttypes.contenttype",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="likes",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Лайк",
+                "verbose_name_plural": "Лайки",
+                "unique_together": {("user", "content_type", "object_id")},
+            },
+        ),
+    ]

core/migrations/0002_view.py

@@ -0,0 +1,53 @@
+# Generated by Django 4.2 on 2023-06-11 10:28
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("contenttypes", "0002_remove_content_type_name"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("core", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="View",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("object_id", models.PositiveIntegerField()),
+                (
+                    "content_type",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="views",
+                        to="contenttypes.contenttype",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="views",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "Просмотр",
+                "verbose_name_plural": "Просмотры",
+                "unique_together": {("user", "content_type", "object_id")},
+            },
+        ),
+    ]

core/models.py

@@ -0,0 +1,65 @@
+from django.contrib.auth import get_user_model
+from django.contrib.contenttypes.fields import GenericForeignKey
+from django.contrib.contenttypes.models import ContentType
+from django.db.models import Model
+from django.db import models
+
+User = get_user_model()
+
+
+class Like(Model):
+    """
+    Generic Like model based on contenttype
+    """
+
+    user = models.ForeignKey(
+        User,
+        on_delete=models.CASCADE,
+        related_name="likes",
+    )
+    content_type = models.ForeignKey(
+        ContentType,
+        on_delete=models.CASCADE,
+        related_name="likes",
+    )
+    object_id = models.PositiveIntegerField()
+    content_object = GenericForeignKey("content_type", "object_id")
+    # is liked?
+
+    class Meta:
+        unique_together = ("user", "content_type", "object_id")
+        verbose_name = "Лайк"
+        verbose_name_plural = "Лайки"
+
+    def __str__(self):
+        return f"Like<{self.user} - {self.content_object}>"
+
+
+class View(Model):
+    """
+    Generic View model based on contenttype
+
+    Indicates if user has viewed the object
+
+    """
+
+    user = models.ForeignKey(
+        User,
+        on_delete=models.CASCADE,
+        related_name="views",
+    )
+    content_type = models.ForeignKey(
+        ContentType,
+        on_delete=models.CASCADE,
+        related_name="views",
+    )
+    object_id = models.PositiveIntegerField()
+    content_object = GenericForeignKey("content_type", "object_id")
+
+    class Meta:
+        unique_together = ("user", "content_type", "object_id")
+        verbose_name = "Просмотр"
+        verbose_name_plural = "Просмотры"
+
+    def __str__(self):
+        return f"View<{self.user} - {self.content_object}>"

core/serializers.py

@@ -0,0 +1,9 @@
+from rest_framework import serializers
+
+
+class SetLikedSerializer(serializers.Serializer):
+    is_liked = serializers.BooleanField()
+
+
+class SetViewedSerializer(serializers.Serializer):
+    is_viewed = serializers.BooleanField()

core/services.py

@@ -0,0 +1,86 @@
+from django.contrib.auth import get_user_model
+from django.contrib.contenttypes.models import ContentType
+
+from core.models import Like, View
+
+User = get_user_model()
+
+
+def add_like(obj, user):
+    obj_type = ContentType.objects.get_for_model(obj)
+    like, is_created = Like.objects.get_or_create(
+        content_type=obj_type, object_id=obj.id, user=user
+    )
+    return like
+
+
+def remove_like(obj, user):
+    obj_type = ContentType.objects.get_for_model(obj)
+    Like.objects.filter(content_type=obj_type, object_id=obj.id, user=user).delete()
+
+
+def is_fan(obj, user) -> bool:
+    if not user.is_authenticated:
+        return False
+    obj_type = ContentType.objects.get_for_model(obj)
+    likes = Like.objects.filter(content_type=obj_type, object_id=obj.id, user=user)
+    return likes.exists()
+
+
+def get_fans(obj):
+    obj_type = ContentType.objects.get_for_model(obj)
+    return User.objects.filter(likes__content_type=obj_type, likes__object_id=obj.id)
+
+
+def get_likes_count(obj):
+    obj_type = ContentType.objects.get_for_model(obj)
+    return User.objects.filter(
+        likes__content_type=obj_type, likes__object_id=obj.id
+    ).count()
+
+
+def set_like(obj, user, is_liked):
+    if is_liked:
+        add_like(obj, user)
+    else:
+        remove_like(obj, user)
+
+
+def add_view(obj, user):
+    obj_type = ContentType.objects.get_for_model(obj)
+    view, is_created = View.objects.get_or_create(
+        content_type=obj_type, object_id=obj.id, user=user
+    )
+    return view
+
+
+def remove_view(obj, user):
+    obj_type = ContentType.objects.get_for_model(obj)
+    View.objects.filter(content_type=obj_type, object_id=obj.id, user=user).delete()
+
+
+def is_viewer(obj, user) -> bool:
+    if not user.is_authenticated:
+        return False
+    obj_type = ContentType.objects.get_for_model(obj)
+    views = View.objects.filter(content_type=obj_type, object_id=obj.id, user=user)
+    return views.exists()
+
+
+def get_viewers(obj):
+    obj_type = ContentType.objects.get_for_model(obj)
+    return User.objects.filter(views__content_type=obj_type, views__object_id=obj.id)
+
+
+def get_views_count(obj):
+    obj_type = ContentType.objects.get_for_model(obj)
+    return User.objects.filter(
+        views__content_type=obj_type, views__object_id=obj.id
+    ).count()
+
+
+def set_viewed(obj, user, is_viewed):
+    if is_viewed:
+        add_view(obj, user)
+    else:
+        remove_view(obj, user)

procollab/settings.py

@@ -75,6 +75,7 @@
     "debug_toolbar",
     "django_rest_passwordreset",
     # My apps
+    "core.apps.CoreConfig",
     "industries.apps.IndustriesConfig",
     "users.apps.UsersConfig",
     "projects.apps.ProjectsConfig",

projects/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from projects.models import Project, Achievement, Collaborator, ProjectLink
+from projects.models import Project, Achievement, Collaborator, ProjectLink, ProjectNews
 
 
 @admin.register(Project)
@@ -16,6 +16,20 @@ class ProjectAdmin(admin.ModelAdmin):
     )
 
 
+@admin.register(ProjectNews)
+class ProjectNewsAdmin(admin.ModelAdmin):
+    list_display = (
+        "id",
+        "project",
+        "datetime_created",
+    )
+    list_display_links = (
+        "id",
+        "project",
+        "datetime_created",
+    )
+
+
 @admin.register(Achievement)
 class AchievementAdmin(admin.ModelAdmin):
     list_display = ("id", "title", "status", "project")

projects/migrations/0013_projectnews.py

@@ -0,0 +1,46 @@
+# Generated by Django 4.2 on 2023-06-08 20:05
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projects", "0012_projectlink"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ProjectNews",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("text", models.TextField()),
+                (
+                    "datetime_created",
+                    models.DateTimeField(auto_now_add=True, verbose_name="Дата создания"),
+                ),
+                (
+                    "datetime_updated",
+                    models.DateTimeField(auto_now=True, verbose_name="Дата изменения"),
+                ),
+                ("views_count", models.PositiveIntegerField(default=0)),
+                (
+                    "project",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="news",
+                        to="projects.project",
+                    ),
+                ),
+            ],
+        ),
+    ]

projects/migrations/0014_alter_projectnews_options_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.2 on 2023-06-11 10:28
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projects", "0013_projectnews"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="projectnews",
+            options={
+                "verbose_name": "Новость проекта",
+                "verbose_name_plural": "Новости проекта",
+            },
+        ),
+        migrations.RemoveField(
+            model_name="projectnews",
+            name="views_count",
+        ),
+    ]