Show post images

README.md

@@ -43,7 +43,8 @@ the less sure I am about it.
 - [x] Receive post edits
 - [x] Set content warnings on posts
 - [x] Show content warnings on posts
-- [ ] Receive images on posts
+- [x] Receive images on posts
+- [x] Receive reply info
 - [x] Create boosts
 - [x] Receive boosts
 - [x] Create likes
@@ -77,6 +78,7 @@ the less sure I am about it.
 - [ ] Attach images to posts
 - [ ] Edit posts
 - [ ] Delete posts
+- [ ] Fetch remote post images locally and thumbnail
 - [ ] Show follow pending states
 - [ ] Manual approval of followers
 - [ ] Reply threading on post creation

activities/admin.py

@@ -1,6 +1,17 @@
 from django.contrib import admin
 
-from activities.models import FanOut, Post, PostInteraction, TimelineEvent
+from activities.models import (
+    FanOut,
+    Post,
+    PostAttachment,
+    PostInteraction,
+    TimelineEvent,
+)
+
+
+class PostAttachmentInline(admin.StackedInline):
+    model = PostAttachment
+    extra = 0
 
 
 @admin.register(Post)
@@ -8,6 +19,8 @@ class PostAdmin(admin.ModelAdmin):
     list_display = ["id", "state", "author", "created"]
     raw_id_fields = ["to", "mentions", "author"]
     actions = ["force_fetch"]
+    search_fields = ["content"]
+    inlines = [PostAttachmentInline]
     readonly_fields = ["created", "updated", "object_json"]
 
     @admin.action(description="Force Fetch")

activities/migrations/0008_postattachment.py

@@ -0,0 +1,69 @@
+# Generated by Django 4.1.3 on 2022-11-17 05:42
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import activities.models.post_attachment
+import stator.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("activities", "0007_post_edited"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="PostAttachment",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("state_ready", models.BooleanField(default=True)),
+                ("state_changed", models.DateTimeField(auto_now_add=True)),
+                ("state_attempted", models.DateTimeField(blank=True, null=True)),
+                ("state_locked_until", models.DateTimeField(blank=True, null=True)),
+                (
+                    "state",
+                    stator.models.StateField(
+                        choices=[("new", "new"), ("fetched", "fetched")],
+                        default="new",
+                        graph=activities.models.post_attachment.PostAttachmentStates,
+                        max_length=100,
+                    ),
+                ),
+                ("mimetype", models.CharField(max_length=200)),
+                (
+                    "file",
+                    models.FileField(
+                        blank=True, null=True, upload_to="attachments/%Y/%m/%d/"
+                    ),
+                ),
+                ("remote_url", models.CharField(blank=True, max_length=500, null=True)),
+                ("name", models.TextField(blank=True, null=True)),
+                ("width", models.IntegerField(blank=True, null=True)),
+                ("height", models.IntegerField(blank=True, null=True)),
+                ("focal_x", models.IntegerField(blank=True, null=True)),
+                ("focal_y", models.IntegerField(blank=True, null=True)),
+                ("blurhash", models.TextField(blank=True, null=True)),
+                (
+                    "post",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="attachments",
+                        to="activities.post",
+                    ),
+                ),
+            ],
+            options={
+                "abstract": False,
+            },
+        ),
+    ]

activities/models/__init__.py

@@ -1,4 +1,5 @@
 from .fan_out import FanOut, FanOutStates  # noqa
 from .post import Post, PostStates  # noqa
+from .post_attachment import PostAttachment, PostAttachmentStates  # noqa
 from .post_interaction import PostInteraction, PostInteractionStates  # noqa
 from .timeline_event import TimelineEvent  # noqa

activities/models/post.py

@@ -146,6 +146,9 @@ class Post(StatorModel):
     def __str__(self):
         return f"{self.author} #{self.id}"
 
+    def get_absolute_url(self):
+        return self.urls.view
+
     @property
     def safe_content(self):
         return sanitize_post(self.content)
@@ -244,11 +247,12 @@ class Post(StatorModel):
                 raise KeyError(f"No post with ID {data['id']}", data)
         if update or created:
             post.content = sanitize_post(data["content"])
-            post.summary = data.get("summary", None)
+            post.summary = data.get("summary")
             post.sensitive = data.get("as:sensitive", False)
-            post.url = data.get("url", None)
-            post.published = parse_ld_date(data.get("published", None))
-            post.edited = parse_ld_date(data.get("updated", None))
+            post.url = data.get("url")
+            post.published = parse_ld_date(data.get("published"))
+            post.edited = parse_ld_date(data.get("updated"))
+            post.in_reply_to = data.get("inReplyTo")
             # Mentions and hashtags
             post.hashtags = []
             for tag in get_list(data, "tag"):
@@ -270,6 +274,26 @@ class Post(StatorModel):
             for target in targets:
                 if target.lower() == "as:public":
                     post.visibility = Post.Visibilities.public
+            # Attachments
+            # These have no IDs, so we have to wipe them each time
+            post.attachments.all().delete()
+            for attachment in get_list(data, "attachment"):
+                if "http://joinmastodon.org/ns#focalPoint" in attachment:
+                    focal_x, focal_y = attachment[
+                        "http://joinmastodon.org/ns#focalPoint"
+                    ]["@list"]
+                else:
+                    focal_x, focal_y = None, None
+                post.attachments.create(
+                    remote_url=attachment["url"],
+                    mimetype=attachment["mediaType"],
+                    name=attachment.get("name"),
+                    width=attachment.get("width"),
+                    height=attachment.get("height"),
+                    blurhash=attachment.get("http://joinmastodon.org/ns#blurhash"),
+                    focal_x=focal_x,
+                    focal_y=focal_y,
+                )
             post.save()
         return post
 
@@ -308,9 +332,13 @@ class Post(StatorModel):
                 raise ValueError("Create actor does not match its Post object", data)
             # Create it
             post = cls.by_ap(data["object"], create=True, update=True)
-            # Make timeline events for followers
-            for follow in Follow.objects.filter(target=post.author, source__local=True):
-                TimelineEvent.add_post(follow.source, post)
+            # Make timeline events for followers if it's not a reply
+            # TODO: _do_ show replies to people we follow somehow
+            if not post.in_reply_to:
+                for follow in Follow.objects.filter(
+                    target=post.author, source__local=True
+                ):
+                    TimelineEvent.add_post(follow.source, post)
             # Make timeline events for mentions if they're local
             for mention in post.mentions.all():
                 if mention.local:

activities/models/post_attachment.py

@@ -0,0 +1,55 @@
+from django.db import models
+
+from stator.models import State, StateField, StateGraph, StatorModel
+
+
+class PostAttachmentStates(StateGraph):
+    new = State(try_interval=30000)
+    fetched = State()
+
+    new.transitions_to(fetched)
+
+    @classmethod
+    async def handle_new(cls, instance):
+        # TODO: Fetch images to our own media storage
+        pass
+
+
+class PostAttachment(StatorModel):
+    """
+    An attachment to a Post. Could be an image, a video, etc.
+    """
+
+    post = models.ForeignKey(
+        "activities.post",
+        on_delete=models.CASCADE,
+        related_name="attachments",
+    )
+
+    state = StateField(graph=PostAttachmentStates)
+
+    mimetype = models.CharField(max_length=200)
+
+    # File may not be populated if it's remote and not cached on our side yet
+    file = models.FileField(upload_to="attachments/%Y/%m/%d/", null=True, blank=True)
+
+    remote_url = models.CharField(max_length=500, null=True, blank=True)
+
+    # This is the description for images, at least
+    name = models.TextField(null=True, blank=True)
+
+    width = models.IntegerField(null=True, blank=True)
+    height = models.IntegerField(null=True, blank=True)
+    focal_x = models.IntegerField(null=True, blank=True)
+    focal_y = models.IntegerField(null=True, blank=True)
+    blurhash = models.TextField(null=True, blank=True)
+
+    def is_image(self):
+        return self.mimetype in [
+            "image/apng",
+            "image/avif",
+            "image/gif",
+            "image/jpeg",
+            "image/png",
+            "image/webp",
+        ]

activities/views/posts.py

@@ -36,7 +36,9 @@ class Like(View):
 
     def post(self, request, handle, post_id):
         identity = by_handle_or_404(self.request, handle, local=False)
-        post = get_object_or_404(identity.posts, pk=post_id)
+        post = get_object_or_404(
+            identity.posts.prefetch_related("attachments"), pk=post_id
+        )
         if self.undo:
             # Undo any likes on the post
             for interaction in PostInteraction.objects.filter(

activities/views/timelines.py

@@ -39,6 +39,7 @@ class Home(FormView):
                 type__in=[TimelineEvent.Types.post, TimelineEvent.Types.boost],
             )
             .select_related("subject_post", "subject_post__author")
+            .prefetch_related("subject_post__attachments")
             .order_by("-created")[:100]
         )
         context["interactions"] = PostInteraction.get_event_interactions(
@@ -66,6 +67,7 @@ class Local(TemplateView):
         context["posts"] = (
             Post.objects.filter(visibility=Post.Visibilities.public, author__local=True)
             .select_related("author")
+            .prefetch_related("attachments")
             .order_by("-created")[:100]
         )
         context["current_page"] = "local"
@@ -82,6 +84,7 @@ class Federated(TemplateView):
         context["posts"] = (
             Post.objects.filter(visibility=Post.Visibilities.public)
             .select_related("author")
+            .prefetch_related("attachments")
             .order_by("-created")[:100]
         )
         context["current_page"] = "federated"

static/css/style.css

@@ -570,6 +570,22 @@ h1.identity small {
     margin: 12px 0 4px 0;
 }
 
+.post .attachments {
+    margin: 10px 0 10px 64px;
+}
+
+.post .attachments a.image {
+    display: inline-block;
+    border: 3px solid var(--color-bg-menu);
+    border-radius: 3px;
+}
+
+.post .attachments a.image img {
+    display: inline-block;
+    max-width: 200px;
+    max-height: 200px;
+}
+
 .post .actions {
     padding-left: 64px;
 }

templates/activities/_post.html

@@ -41,6 +41,16 @@
         {{ post.safe_content }}
     </div>
 
+    {% if post.attachments.exists %}
+        <div class="attachments">
+            {% for attachment in post.attachments.all %}
+                {% if attachment.is_image %}
+                    <a href="{{ attachment.remote_url }}" class="image"><img src="{{ attachment.remote_url }}" title="{{ attachment.name }}"></a>
+                {% endif %}
+            {% endfor %}
+        </div>
+    {% endif %}
+
     {% if request.identity %}
     <div class="actions">
         {% include "activities/_like.html" %}