Lists

activities/services/post.py

@@ -1,5 +1,7 @@
 import logging
 
+from django.db.models import OuterRef
+
 from activities.models import (
     Post,
     PostInteraction,
@@ -18,11 +20,11 @@ class PostService:
     """
 
     @classmethod
-    def queryset(cls):
+    def queryset(cls, include_reply_to_author=False):
         """
         Returns the base queryset to use for fetching posts efficiently.
         """
-        return (
+        qs = (
             Post.objects.not_hidden()
             .prefetch_related(
                 "attachments",
@@ -34,6 +36,13 @@ class PostService:
                 "author__domain",
             )
         )
+        if include_reply_to_author:
+            qs = qs.annotate(
+                in_reply_to_author_id=Post.objects.filter(
+                    object_uri=OuterRef("in_reply_to")
+                ).values("author_id")[:1]
+            )
+        return qs
 
     def __init__(self, post: Post):
         self.post = post

activities/services/timeline.py

@@ -8,7 +8,8 @@ from activities.models import (
     TimelineEvent,
 )
 from activities.services import PostService
-from users.models import Identity
+from users.models import Identity, List
+from users.services import IdentityService
 
 
 class TimelineService:
@@ -152,3 +153,30 @@ class TimelineService:
             .filter(bookmarks__identity=self.identity)
             .order_by("-id")
         )
+
+    def for_list(self, alist: List) -> models.QuerySet[Post]:
+        """
+        Return posts from members of `alist`, filtered by the lists replies policy.
+        """
+        assert self.identity  # Appease mypy
+        # We only need to include this if we need to filter on it.
+        include_author = alist.replies_policy == "followed"
+        members = alist.members.all()
+        queryset = PostService.queryset(include_reply_to_author=include_author)
+        match alist.replies_policy:
+            case "list":
+                # The default is to show posts (and replies) from list members.
+                criteria = models.Q(author__in=members)
+            case "none":
+                # Don't show any replies, just original posts from list members.
+                criteria = models.Q(author__in=members) & models.Q(
+                    in_reply_to__isnull=True
+                )
+            case "followed":
+                # Show posts from list members OR from accounts you follow replying to
+                # posts by list members.
+                criteria = models.Q(author__in=members) | (
+                    models.Q(author__in=IdentityService(self.identity).following())
+                    & models.Q(in_reply_to_author_id__in=members)
+                )
+        return queryset.filter(criteria).order_by("-id")

api/schemas.py

@@ -407,11 +407,15 @@ class Announcement(Schema):
 class List(Schema):
     id: str
     title: str
-    replies_policy: Literal[
-        "followed",
-        "list",
-        "none",
-    ]
+    replies_policy: Literal["followed", "list", "none"]
+    exclusive: bool
+
+    @classmethod
+    def from_list(
+        cls,
+        list_instance: users_models.List,
+    ) -> "List":
+        return cls(**list_instance.to_mastodon_json())
 
 
 class Preferences(Schema):

api/urls.py

@@ -44,6 +44,7 @@ urlpatterns = [
     path("v1/accounts/<id>/following", accounts.account_following),
     path("v1/accounts/<id>/followers", accounts.account_followers),
     path("v1/accounts/<id>/featured_tags", accounts.account_featured_tags),
+    path("v1/accounts/<id>/lists", accounts.account_lists),
     # Announcements
     path("v1/announcements", announcements.announcement_list),
     path("v1/announcements/<pk>/dismiss", announcements.announcement_dismiss),
@@ -67,7 +68,29 @@ urlpatterns = [
     path("v1/instance/peers", instance.peers),
     path("v2/instance", instance.instance_info_v2),
     # Lists
-    path("v1/lists", lists.get_lists),
+    path(
+        "v1/lists",
+        methods(
+            get=lists.get_lists,
+            post=lists.create_list,
+        ),
+    ),
+    path(
+        "v1/lists/<id>",
+        methods(
+            get=lists.get_list,
+            put=lists.update_list,
+            delete=lists.delete_list,
+        ),
+    ),
+    path(
+        "v1/lists/<id>/accounts",
+        methods(
+            get=lists.get_accounts,
+            post=lists.add_accounts,
+            delete=lists.delete_accounts,
+        ),
+    ),
     # Markers
     path(
         "v1/markers",
@@ -134,6 +157,7 @@ urlpatterns = [
     path("v1/timelines/home", timelines.home),
     path("v1/timelines/public", timelines.public),
     path("v1/timelines/tag/<hashtag>", timelines.hashtag),
+    path("v1/timelines/list/<list_id>", timelines.list_timeline),
     path("v1/conversations", timelines.conversations),
     path("v1/favourites", timelines.favourites),
     # Trends

api/views/accounts.py

@@ -373,3 +373,15 @@ def account_followers(
 def account_featured_tags(request: HttpRequest, id: str) -> list[schemas.FeaturedTag]:
     # Not implemented yet
     return []
+
+
+@scope_required("read:lists")
+@api_view.get
+def account_lists(request: HttpRequest, id: str) -> list[schemas.List]:
+    identity = get_object_or_404(
+        Identity.objects.exclude(restriction=Identity.Restriction.blocked), pk=id
+    )
+    return [
+        schemas.List.from_list(lst)
+        for lst in request.identity.lists.filter(members=identity)
+    ]

api/views/lists.py

@@ -1,12 +1,95 @@
+from typing import Literal
+
 from django.http import HttpRequest
-from hatchway import api_view
+from django.shortcuts import get_object_or_404
+from hatchway import Schema, api_view
 
 from api import schemas
 from api.decorators import scope_required
 
 
+class CreateList(Schema):
+    title: str
+    replies_policy: Literal["followed", "list", "none"] = "list"
+    exclusive: bool = False
+
+
+class UpdateList(Schema):
+    title: str | None
+    replies_policy: Literal["followed", "list", "none"] | None
+    exclusive: bool | None
+
+
 @scope_required("read:lists")
 @api_view.get
 def get_lists(request: HttpRequest) -> list[schemas.List]:
-    # We don't implement this yet
-    return []
+    return [schemas.List.from_list(lst) for lst in request.identity.lists.all()]
+
+
+@scope_required("write:lists")
+@api_view.post
+def create_list(request: HttpRequest, data: CreateList) -> schemas.List:
+    created = request.identity.lists.create(
+        title=data.title,
+        replies_policy=data.replies_policy,
+        exclusive=data.exclusive,
+    )
+    return schemas.List.from_list(created)
+
+
+@scope_required("read:lists")
+@api_view.get
+def get_list(request: HttpRequest, id: str) -> schemas.List:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    return schemas.List.from_list(alist)
+
+
+@scope_required("write:lists")
+@api_view.put
+def update_list(request: HttpRequest, id: str, data: UpdateList) -> schemas.List:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    if data.title:
+        alist.title = data.title
+    if data.replies_policy:
+        alist.replies_policy = data.replies_policy
+    if data.exclusive is not None:
+        alist.exclusive = data.exclusive
+    alist.save()
+    return schemas.List.from_list(alist)
+
+
+@scope_required("write:lists")
+@api_view.delete
+def delete_list(request: HttpRequest, id: str) -> dict:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    alist.delete()
+    return {}
+
+
+@scope_required("write:lists")
+@api_view.get
+def get_accounts(request: HttpRequest, id: str) -> list[schemas.Account]:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    return [schemas.Account.from_identity(ident) for ident in alist.members.all()]
+
+
+@scope_required("write:lists")
+@api_view.post
+def add_accounts(request: HttpRequest, id: str) -> dict:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    add_ids = request.PARAMS.get("account_ids")
+    for follow in request.identity.outbound_follows.filter(
+        target__id__in=add_ids
+    ).select_related("target"):
+        alist.members.add(follow.target)
+    return {}
+
+
+@scope_required("write:lists")
+@api_view.delete
+def delete_accounts(request: HttpRequest, id: str) -> dict:
+    alist = get_object_or_404(request.identity.lists, pk=id)
+    remove_ids = request.PARAMS.get("account_ids")
+    for ident in alist.members.filter(id__in=remove_ids):
+        alist.members.remove(ident)
+    return {}

api/views/timelines.py

@@ -1,4 +1,5 @@
 from django.http import HttpRequest
+from django.shortcuts import get_object_or_404
 from hatchway import ApiError, ApiResponse, api_view
 
 from activities.models import Post, TimelineEvent
@@ -159,3 +160,31 @@ def favourites(
         request=request,
         include_params=["limit"],
     )
+
+
+@scope_required("read:lists")
+@api_view.get
+def list_timeline(
+    request: HttpRequest,
+    list_id: str,
+    max_id: str | None = None,
+    since_id: str | None = None,
+    min_id: str | None = None,
+    limit: int = 20,
+) -> ApiResponse[list[schemas.Status]]:
+    alist = get_object_or_404(request.identity.lists, pk=list_id)
+    queryset = TimelineService(request.identity).for_list(alist)
+
+    paginator = MastodonPaginator()
+    pager: PaginationResult[Post] = paginator.paginate(
+        queryset,
+        min_id=min_id,
+        max_id=max_id,
+        since_id=since_id,
+        limit=limit,
+    )
+    return PaginatingApiResponse(
+        schemas.Status.map_from_post(pager.results, request.identity),
+        request=request,
+        include_params=["limit"],
+    )

users/admin.py

@@ -13,6 +13,7 @@ from users.models import (
     Identity,
     InboxMessage,
     Invite,
+    List,
     Marker,
     PasswordReset,
     Report,
@@ -213,6 +214,12 @@ class InviteAdmin(admin.ModelAdmin):
     list_display = ["id", "created", "token", "note"]
 
 
+@admin.register(List)
+class ListAdmin(admin.ModelAdmin):
+    list_display = ["id", "identity", "title", "replies_policy", "exclusive"]
+    autocomplete_fields = ["members"]
+
+
 @admin.register(Marker)
 class MarkerAdmin(admin.ModelAdmin):
     list_display = ["id", "identity", "timeline", "last_read_id", "updated_at"]

users/migrations/0024_list.py

@@ -0,0 +1,54 @@
+# Generated by Django 4.2.11 on 2024-04-19 01:03
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("users", "0023_marker"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="List",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("title", models.CharField(max_length=200)),
+                (
+                    "replies_policy",
+                    models.CharField(
+                        choices=[
+                            ("followed", "Followed"),
+                            ("list", "List Only"),
+                            ("none", "None"),
+                        ],
+                        max_length=10,
+                    ),
+                ),
+                ("exclusive", models.BooleanField()),
+                (
+                    "identity",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="lists",
+                        to="users.identity",
+                    ),
+                ),
+                (
+                    "members",
+                    models.ManyToManyField(
+                        blank=True, related_name="in_lists", to="users.identity"
+                    ),
+                ),
+            ],
+        ),
+    ]

users/models/__init__.py

@@ -7,6 +7,7 @@ from .hashtag_follow import HashtagFollow  # noqa
 from .identity import Identity, IdentityStates  # noqa
 from .inbox_message import InboxMessage, InboxMessageStates  # noqa
 from .invite import Invite  # noqa
+from .lists import List  # noqa
 from .marker import Marker  # noqa
 from .password_reset import PasswordReset  # noqa
 from .report import Report  # noqa

users/models/lists.py

@@ -0,0 +1,37 @@
+from django.db import models
+
+
+class List(models.Model):
+    """
+    A list of accounts.
+    """
+
+    class RepliesPolicy(models.TextChoices):
+        followed = "followed"
+        list_only = "list"
+        none = "none"
+
+    identity = models.ForeignKey(
+        "users.Identity",
+        on_delete=models.CASCADE,
+        related_name="lists",
+    )
+    title = models.CharField(max_length=200)
+    replies_policy = models.CharField(max_length=10, choices=RepliesPolicy.choices)
+    exclusive = models.BooleanField()
+    members = models.ManyToManyField(
+        "users.Identity",
+        related_name="in_lists",
+        blank=True,
+    )
+
+    def __str__(self):
+        return f"#{self.id}: {self.identity} → {self.title}"
+
+    def to_mastodon_json(self):
+        return {
+            "id": str(self.id),
+            "title": self.title,
+            "replies_policy": self.replies_policy,
+            "exclusive": self.exclusive,
+        }