Get outbound likes/boosts and their undos working

26 files changed, 460 insertions, 101 deletions

diff --git a/README.md b/README.md
index e7846e3..435aa54 100644
--- a/README.md
+++ b/README.md
@@ -39,14 +39,14 @@ the less sure I am about it.
 - [ ] Set post visibility
 - [x] Receive posts
 - [ ] Handle received post visibility
-- [ ] Receive post deletions
+- [x] Receive post deletions
 - [x] Set content warnings on posts
 - [ ] Show content warnings on posts
 - [ ] Attach images to posts
 - [ ] Receive images on posts
-- [ ] Create boosts
+- [x] Create boosts
 - [x] Receive boosts
-- [ ] Create likes
+- [x] Create likes
 - [x] Receive likes
 - [x] Create follows
 - [ ] Undo follows
diff --git a/activities/admin.py b/activities/admin.py
index 947a596..a025230 100644
--- a/activities/admin.py
+++ b/activities/admin.py
@@ -6,25 +6,42 @@ from activities.models import FanOut, Post, PostInteraction, TimelineEvent
 @admin.register(Post)
 class PostAdmin(admin.ModelAdmin):
     list_display = ["id", "state", "author", "created"]
-    raw_id_fields = ["to", "mentions"]
+    raw_id_fields = ["to", "mentions", "author"]
     actions = ["force_fetch"]
+    readonly_fields = ["created", "updated", "object_json"]
 
     @admin.action(description="Force Fetch")
     def force_fetch(self, request, queryset):
         for instance in queryset:
             instance.debug_fetch()
 
+    @admin.display(description="ActivityPub JSON")
+    def object_json(self, instance):
+        return instance.to_ap()
+
 
 @admin.register(TimelineEvent)
 class TimelineEventAdmin(admin.ModelAdmin):
     list_display = ["id", "identity", "created", "type"]
-    raw_id_fields = ["identity", "subject_post", "subject_identity"]
+    raw_id_fields = [
+        "identity",
+        "subject_post",
+        "subject_identity",
+        "subject_post_interaction",
+    ]
 
 
 @admin.register(FanOut)
 class FanOutAdmin(admin.ModelAdmin):
     list_display = ["id", "state", "state_attempted", "type", "identity"]
-    raw_id_fields = ["identity", "subject_post"]
+    raw_id_fields = ["identity", "subject_post", "subject_post_interaction"]
+    readonly_fields = ["created", "updated"]
+    actions = ["force_execution"]
+
+    @admin.action(description="Force Execution")
+    def force_execution(self, request, queryset):
+        for instance in queryset:
+            instance.transition_perform("new")
 
 
 @admin.register(PostInteraction)
diff --git a/activities/models/__init__.py b/activities/models/__init__.py
index a0680ad..48ba879 100644
--- a/activities/models/__init__.py
+++ b/activities/models/__init__.py
@@ -1,4 +1,4 @@
-from .fan_out import FanOut  # noqa
-from .post import Post  # noqa
-from .post_interaction import PostInteraction  # noqa
+from .fan_out import FanOut, FanOutStates  # noqa
+from .post import Post, PostStates  # noqa
+from .post_interaction import PostInteraction, PostInteractionStates  # noqa
 from .timeline_event import TimelineEvent  # noqa
diff --git a/activities/models/fan_out.py b/activities/models/fan_out.py
index dbe86c0..771be19 100644
--- a/activities/models/fan_out.py
+++ b/activities/models/fan_out.py
@@ -38,6 +38,40 @@ class FanOutStates(StateGraph):
                     key_id=post.author.public_key_id,
                 )
             return cls.sent
+        # Handle boosts/likes
+        elif fan_out.type == FanOut.Types.interaction:
+            interaction = await fan_out.subject_post_interaction.afetch_full()
+            if fan_out.identity.local:
+                # Make a timeline event directly
+                await sync_to_async(TimelineEvent.add_post_interaction)(
+                    identity=fan_out.identity,
+                    interaction=interaction,
+                )
+            else:
+                # Send it to the remote inbox
+                await HttpSignature.signed_request(
+                    uri=fan_out.identity.inbox_uri,
+                    body=canonicalise(interaction.to_ap()),
+                    private_key=interaction.identity.private_key,
+                    key_id=interaction.identity.public_key_id,
+                )
+        # Handle undoing boosts/likes
+        elif fan_out.type == FanOut.Types.undo_interaction:
+            interaction = await fan_out.subject_post_interaction.afetch_full()
+            if fan_out.identity.local:
+                # Delete any local timeline events
+                await sync_to_async(TimelineEvent.delete_post_interaction)(
+                    identity=fan_out.identity,
+                    interaction=interaction,
+                )
+            else:
+                # Send an undo to the remote inbox
+                await HttpSignature.signed_request(
+                    uri=fan_out.identity.inbox_uri,
+                    body=canonicalise(interaction.to_undo_ap()),
+                    private_key=interaction.identity.private_key,
+                    key_id=interaction.identity.public_key_id,
+                )
         else:
             raise ValueError(f"Cannot fan out with type {fan_out.type}")
 
@@ -50,6 +84,7 @@ class FanOut(StatorModel):
     class Types(models.TextChoices):
         post = "post"
         interaction = "interaction"
+        undo_interaction = "undo_interaction"
 
     state = StateField(FanOutStates)
 
diff --git a/activities/models/post.py b/activities/models/post.py
index 74b335b..22e6412 100644
--- a/activities/models/post.py
+++ b/activities/models/post.py
@@ -2,7 +2,7 @@ from typing import Dict, Optional
 
 import httpx
 import urlman
-from django.db import models
+from django.db import models, transaction
 from django.utils import timezone
 
 from activities.models.fan_out import FanOut
@@ -99,7 +99,12 @@ class Post(StatorModel):
 
     class urls(urlman.Urls):
         view = "{self.author.urls.view}posts/{self.id}/"
-        object_uri = "{self.author.urls.actor}posts/{self.id}/"
+        view_nice = "{self.author.urls.view_nice}posts/{self.id}/"
+        object_uri = "{self.author.actor_uri}posts/{self.id}/"
+        action_like = "{view}like/"
+        action_unlike = "{view}unlike/"
+        action_boost = "{view}boost/"
+        action_unboost = "{view}unboost/"
 
         def get_scheme(self, url):
             return "https"
@@ -130,16 +135,17 @@ class Post(StatorModel):
     def create_local(
         cls, author: Identity, content: str, summary: Optional[str] = None
     ) -> "Post":
-        post = cls.objects.create(
-            author=author,
-            content=content,
-            summary=summary or None,
-            sensitive=bool(summary),
-            local=True,
-        )
-        post.object_uri = post.author.actor_uri + f"posts/{post.id}/"
-        post.url = post.object_uri
-        post.save()
+        with transaction.atomic():
+            post = cls.objects.create(
+                author=author,
+                content=content,
+                summary=summary or None,
+                sensitive=bool(summary),
+                local=True,
+            )
+            post.object_uri = post.urls.object_uri
+            post.url = post.urls.view_nice
+            post.save()
         return post
 
     ### ActivityPub (outbound) ###
@@ -179,7 +185,7 @@ class Post(StatorModel):
             "content": self.safe_content,
             "to": "as:Public",
             "as:sensitive": self.sensitive,
-            "url": self.urls.view.full(),  # type: ignore
+            "url": self.urls.view_nice if self.local else self.url,
         }
         if self.summary:
             value["summary"] = self.summary
@@ -257,7 +263,7 @@ class Post(StatorModel):
                         create=True,
                         update=True,
                     )
-            raise ValueError(f"Cannot find Post with URI {object_uri}")
+            raise cls.DoesNotExist(f"Cannot find Post with URI {object_uri}")
 
     @classmethod
     def handle_create_ap(cls, data):
@@ -275,6 +281,22 @@ class Post(StatorModel):
         # Force it into fanned_out as it's not ours
         post.transition_perform(PostStates.fanned_out)
 
+    @classmethod
+    def handle_delete_ap(cls, data):
+        """
+        Handles an incoming create request
+        """
+        # Find our post by ID if we have one
+        try:
+            post = cls.by_object_uri(data["object"]["id"])
+        except cls.DoesNotExist:
+            # It's already been deleted
+            return
+        # Ensure the actor on the request authored the post
+        if not post.author.actor_uri == data["actor"]:
+            raise ValueError("Actor on delete does not match object")
+        post.delete()
+
     def debug_fetch(self):
         """
         Fetches the Post from its original URL again and updates us with it
diff --git a/activities/models/post_interaction.py b/activities/models/post_interaction.py
index 151ab45..ea95cdf 100644
--- a/activities/models/post_interaction.py
+++ b/activities/models/post_interaction.py
@@ -14,9 +14,13 @@ from users.models.identity import Identity
 
 class PostInteractionStates(StateGraph):
     new = State(try_interval=300)
-    fanned_out = State()
+    fanned_out = State(externally_progressed=True)
+    undone = State(try_interval=300)
+    undone_fanned_out = State()
 
     new.transitions_to(fanned_out)
+    fanned_out.transitions_to(undone)
+    undone.transitions_to(undone_fanned_out)
 
     @classmethod
     async def handle_new(cls, instance: "PostInteraction"):
@@ -31,26 +35,74 @@ class PostInteractionStates(StateGraph):
             ):
                 if follow.source.local or follow.target.local:
                     await FanOut.objects.acreate(
-                        identity_id=follow.source_id,
                         type=FanOut.Types.interaction,
-                        subject_post=interaction,
+                        identity_id=follow.source_id,
+                        subject_post=interaction.post,
+                        subject_post_interaction=interaction,
                     )
         # Like: send a copy to the original post author only
         elif interaction.type == interaction.Types.like:
             await FanOut.objects.acreate(
-                identity_id=interaction.post.author_id,
                 type=FanOut.Types.interaction,
-                subject_post=interaction,
+                identity_id=interaction.post.author_id,
+                subject_post=interaction.post,
+                subject_post_interaction=interaction,
             )
         else:
             raise ValueError("Cannot fan out unknown type")
-        # And one for themselves if they're local
-        if interaction.identity.local:
+        # And one for themselves if they're local and it's a boost
+        if (
+            interaction.type == PostInteraction.Types.boost
+            and interaction.identity.local
+        ):
             await FanOut.objects.acreate(
                 identity_id=interaction.identity_id,
                 type=FanOut.Types.interaction,
-                subject_post=interaction,
+                subject_post=interaction.post,
+                subject_post_interaction=interaction,
+            )
+        return cls.fanned_out
+
+    @classmethod
+    async def handle_undone(cls, instance: "PostInteraction"):
+        """
+        Creates all needed fan-out objects to undo a PostInteraction.
+        """
+        interaction = await instance.afetch_full()
+        # Undo Boost: send a copy to all people who follow this user
+        if interaction.type == interaction.Types.boost:
+            async for follow in interaction.identity.inbound_follows.select_related(
+                "source", "target"
+            ):
+                if follow.source.local or follow.target.local:
+                    await FanOut.objects.acreate(
+                        type=FanOut.Types.undo_interaction,
+                        identity_id=follow.source_id,
+                        subject_post=interaction.post,
+                        subject_post_interaction=interaction,
+                    )
+        # Undo Like: send a copy to the original post author only
+        elif interaction.type == interaction.Types.like:
+            await FanOut.objects.acreate(
+                type=FanOut.Types.undo_interaction,
+                identity_id=interaction.post.author_id,
+                subject_post=interaction.post,
+                subject_post_interaction=interaction,
+            )
+        else:
+            raise ValueError("Cannot fan out unknown type")
+        # And one for themselves if they're local and it's a boost
+        if (
+            interaction.type == PostInteraction.Types.boost
+            and interaction.identity.local
+        ):
+            await FanOut.objects.acreate(
+                identity_id=interaction.identity_id,
+                type=FanOut.Types.undo_interaction,
+                subject_post=interaction.post,
+                subject_post_interaction=interaction,
             )
+        return cls.undone_fanned_out
 
 
 class PostInteraction(StatorModel):
@@ -95,6 +147,35 @@ class PostInteraction(StatorModel):
     class Meta:
         index_together = [["type", "identity", "post"]]
 
+    ### Display helpers ###
+
+    @classmethod
+    def get_post_interactions(cls, posts, identity):
+        """
+        Returns a dict of {interaction_type: set(post_ids)} for all the posts
+        and the given identity, for use in templates.
+        """
+        # Bulk-fetch any interactions
+        ids_with_interaction_type = cls.objects.filter(
+            identity=identity,
+            post_id__in=[post.pk for post in posts],
+            type__in=[cls.Types.like, cls.Types.boost],
+            state__in=[PostInteractionStates.new, PostInteractionStates.fanned_out],
+        ).values_list("post_id", "type")
+        # Make it into the return dict
+        result = {}
+        for post_id, interaction_type in ids_with_interaction_type:
+            result.setdefault(interaction_type, set()).add(post_id)
+        return result
+
+    @classmethod
+    def get_event_interactions(cls, events, identity):
+        """
+        Returns a dict of {interaction_type: set(post_ids)} for all the posts
+        within the events and the given identity, for use in templates.
+        """
+        return cls.get_post_interactions([e.subject_post for e in events], identity)
+
     ### Async helpers ###
 
     async def afetch_full(self):
@@ -111,6 +192,9 @@ class PostInteraction(StatorModel):
         """
         Returns the AP JSON for this object
         """
+        # Create an object URI if we don't have one
+        if self.object_uri is None:
+            self.object_uri = self.identity.actor_uri + f"#{self.type}/{self.id}"
         if self.type == self.Types.boost:
             value = {
                 "type": "Announce",
@@ -132,6 +216,18 @@ class PostInteraction(StatorModel):
             raise ValueError("Cannot turn into AP")
         return value
 
+    def to_undo_ap(self) -> Dict:
+        """
+        Returns the AP JSON to undo this object
+        """
+        object = self.to_ap()
+        return {
+            "id": object["id"] + "/undo",
+            "type": "Undo",
+            "actor": self.identity.actor_uri,
+            "object": object,
+        }
+
     ### ActivityPub (inbound) ###
 
     @classmethod
diff --git a/activities/models/timeline_event.py b/activities/models/timeline_event.py
index 6dba32c..29dec19 100644
--- a/activities/models/timeline_event.py
+++ b/activities/models/timeline_event.py
@@ -114,3 +114,20 @@ class TimelineEvent(models.Model):
                 subject_identity_id=interaction.identity_id,
                 subject_post_interaction=interaction,
             )[0]
+
+    @classmethod
+    def delete_post_interaction(cls, identity, interaction):
+        if interaction.type == interaction.Types.like:
+            cls.objects.filter(
+                identity=identity,
+                type=cls.Types.liked,
+                subject_post_id=interaction.post_id,
+                subject_identity_id=interaction.identity_id,
+            ).delete()
+        elif interaction.type == interaction.Types.boost:
+            cls.objects.filter(
+                identity=identity,
+                type__in=[cls.Types.boosted, cls.Types.boost],
+                subject_post_id=interaction.post_id,
+                subject_identity_id=interaction.identity_id,
+            ).delete()
diff --git a/activities/views/posts.py b/activities/views/posts.py
new file mode 100644
index 0000000..ece7cf3
--- /dev/null
+++ b/activities/views/posts.py
@@ -0,0 +1,102 @@
+from django.shortcuts import get_object_or_404, redirect, render
+from django.utils.decorators import method_decorator
+from django.views.generic import TemplateView, View
+
+from activities.models import PostInteraction, PostInteractionStates
+from users.decorators import identity_required
+from users.shortcuts import by_handle_or_404
+
+
+class Post(TemplateView):
+
+    template_name = "activities/post.html"
+
+    def get_context_data(self, handle, post_id):
+        identity = by_handle_or_404(self.request, handle, local=False)
+        post = get_object_or_404(identity.posts, pk=post_id)
+        return {
+            "identity": identity,
+            "post": post,
+            "interactions": PostInteraction.get_post_interactions(
+                [post],
+                self.request.identity,
+            ),
+        }
+
+
+@method_decorator(identity_required, name="dispatch")
+class Like(View):
+    """
+    Adds/removes a like from the current identity to the post
+    """
+
+    undo = False
+
+    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)
+        if self.undo:
+            # Undo any likes on the post
+            for interaction in PostInteraction.objects.filter(
+                type=PostInteraction.Types.like,
+                identity=request.identity,
+                post=post,
+            ):
+                interaction.transition_perform(PostInteractionStates.undone)
+        else:
+            # Make a like on this post if we didn't already
+            PostInteraction.objects.get_or_create(
+                type=PostInteraction.Types.like,
+                identity=request.identity,
+                post=post,
+            )
+        # Return either a redirect or a HTMX snippet
+        if request.htmx:
+            return render(
+                request,
+                "activities/_like.html",
+                {
+                    "post": post,
+                    "interactions": {"like": set() if self.undo else {post.pk}},
+                },
+            )
+        return redirect(post.urls.view)
+
+
+@method_decorator(identity_required, name="dispatch")
+class Boost(View):
+    """
+    Adds/removes a boost from the current identity to the post
+    """
+
+    undo = False
+
+    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)
+        if self.undo:
+            # Undo any boosts on the post
+            for interaction in PostInteraction.objects.filter(
+                type=PostInteraction.Types.boost,
+                identity=request.identity,
+                post=post,
+            ):
+                interaction.transition_perform(PostInteractionStates.undone)
+        else:
+            # Make a boost on this post if we didn't already
+            PostInteraction.objects.get_or_create(
+                type=PostInteraction.Types.boost,
+                identity=request.identity,
+                post=post,
+            )
+        # Return either a redirect or a HTMX snippet
+        if request.htmx:
+            return render(
+                request,
+                "activities/_boost.html",
+                {
+                    "post": post,
+                    "interactions": {"boost": set() if self.undo else {post.pk}},
+                },
+            )
+        return redirect(post.urls.view)
diff --git a/activities/views/timelines.py b/activities/views/timelines.py
index 9be988d..c59c3b6 100644
--- a/activities/views/timelines.py
+++ b/activities/views/timelines.py
@@ -4,7 +4,7 @@ from django.template.defaultfilters import linebreaks_filter
 from django.utils.decorators import method_decorator
 from django.views.generic import FormView, TemplateView
 
-from activities.models import Post, TimelineEvent
+from activities.models import Post, PostInteraction, TimelineEvent
 from users.decorators import identity_required
 
 
@@ -33,7 +33,7 @@ class Home(FormView):
 
     def get_context_data(self):
         context = super().get_context_data()
-        context["events"] = (
+        context["events"] = list(
             TimelineEvent.objects.filter(
                 identity=self.request.identity,
                 type__in=[TimelineEvent.Types.post, TimelineEvent.Types.boost],
@@ -41,7 +41,9 @@ class Home(FormView):
             .select_related("subject_post", "subject_post__author")
             .order_by("-created")[:100]
         )
-
+        context["interactions"] = PostInteraction.get_event_interactions(
+            context["events"], self.request.identity
+        )
         context["current_page"] = "home"
         return context
 
diff --git a/core/signatures.py b/core/signatures.py
index 0959333..8b52c1a 100644
--- a/core/signatures.py
+++ b/core/signatures.py
@@ -115,15 +115,11 @@ class HttpSignature:
         if "HTTP_DIGEST" in request.META:
             expected_digest = HttpSignature.calculate_digest(request.body)
             if request.META["HTTP_DIGEST"] != expected_digest:
-                print("Wrong digest")
                 raise VerificationFormatError("Digest is incorrect")
         # Verify date header
         if "HTTP_DATE" in request.META and not skip_date:
             header_date = parse_http_date(request.META["HTTP_DATE"])
             if abs(timezone.now().timestamp() - header_date) > 60:
-                print(
-                    f"Date mismatch - they sent {header_date}, now is {timezone.now().timestamp()}"
-                )
                 raise VerificationFormatError("Date is too far away")
         # Get the signature details
         if "HTTP_SIGNATURE" not in request.META:
@@ -186,7 +182,6 @@ class HttpSignature:
         )
         del headers["(request-target)"]
         async with httpx.AsyncClient() as client:
-            print(f"Calling {method} {uri}")
             response = await client.request(
                 method,
                 uri,
diff --git a/requirements.txt b/requirements.txt
index 1c09acd..ce82854 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ gunicorn~=20.1.0
 psycopg2~=2.9.5
 bleach~=5.0.1
 pydantic~=1.10.2
+django-htmx~=1.13.0
diff --git a/static/css/style.css b/static/css/style.css
index 59590ef..9eaec2f 100644
--- a/static/css/style.css
+++ b/static/css/style.css
@@ -528,6 +528,23 @@ h1.identity small {
     margin: 12px 0 4px 0;
 }
 
+.post .actions {
+    padding-left: 64px;
+}
+
+.post .actions a {
+    cursor: pointer;
+    color: var(--color-text-dull);
+}
+
+.post .actions a:hover {
+    color: var(--color-text-main);
+}
+
+.post .actions a.active {
+    color: var(--color-highlight);
+}
+
 .boost-banner {
     padding: 0 0 3px 5px;
 }
diff --git a/static/js/htmx.min.js b/static/js/htmx.min.js
new file mode 100755
index 0000000..293df11
--- /dev/null
+++ b/static/js/htmx.min.js
@@ -0,0 +1 @@
+(function(e,t){if(typeof define==="function"&&define.amd){define([],t)}else{e.htmx=e.htmx||t()}})(typeof self!=="undefined"?self:this,function(){return function(){"use strict";var W={onLoad:t,process:mt,on:X,off:F,trigger:Q,ajax:or,find:R,findAll:O,closest:N,values:function(e,t){var r=jt(e,t||"post");return r.values},remove:q,addClass:L,removeClass:T,toggleClass:H,takeClass:A,defineExtension:dr,removeExtension:vr,logAll:C,logger:null,config:{historyEnabled:true,historyCacheSize:10,refreshOnHistoryMiss:false,defaultSwapStyle:"innerHTML",defaultSwapDelay:0,defaultSettleDelay:20,includeIndicatorStyles:true,indicatorClass:"htmx-indicator",requestClass:"htmx-request",addedClass:"htmx-added",settlingClass:"htmx-settling",swappingClass:"htmx-swapping",allowEval:true,inlineScriptNonce:"",attributesToSettle:["class","style","width","height"],withCredentials:false,timeout:0,wsReconnectDelay:"full-jitter",disableSelector:"[hx-disable], 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diff --git a/stator/graph.py b/stator/graph.py
index 00ef1c4..ef81d75 100644
--- a/stator/graph.py
+++ b/stator/graph.py
@@ -11,6 +11,7 @@ class StateGraph:
     choices: ClassVar[List[Tuple[object, str]]]
     initial_state: ClassVar["State"]
     terminal_states: ClassVar[Set["State"]]
+    automatic_states: ClassVar[Set["State"]]
 
     def __init_subclass__(cls) -> None:
         # Collect state memebers
@@ -30,6 +31,7 @@ class StateGraph:
                 )
         # Check the graph layout
         terminal_states = set()
+        automatic_states = set()
         initial_state = None
         for state in cls.states.values():
             # Check for multiple initial states
@@ -65,10 +67,12 @@ class StateGraph:
                         raise ValueError(
                             f"State '{state}' does not have a handler method ({state.handler_name})"
                         )
+                    automatic_states.add(state)
         if initial_state is None:
             raise ValueError("The graph has no initial state")
         cls.initial_state = initial_state
         cls.terminal_states = terminal_states
+        cls.automatic_states = automatic_states
         # Generate choices
         cls.choices = [(name, name) for name in cls.states.keys()]
 
diff --git a/stator/models.py b/stator/models.py
index b2cc681..df385dd 100644
--- a/stator/models.py
+++ b/stator/models.py
@@ -105,9 +105,11 @@ class StatorModel(models.Model):
         """
         with transaction.atomic():
             selected = list(
-                cls.objects.filter(state_locked_until__isnull=True, state_ready=True)[
-                    :number
-                ].select_for_update()
+                cls.objects.filter(
+                    state_locked_until__isnull=True,
+                    state_ready=True,
+                    state__in=cls.state_graph.automatic_states,
+                )[:number].select_for_update()
             )
             cls.objects.filter(pk__in=[i.pk for i in selected]).update(
                 state_locked_until=lock_expiry
@@ -144,7 +146,9 @@ class StatorModel(models.Model):
         # If it's a manual progression state don't even try
         # We shouldn't really be here in this case, but it could be a race condition
         if current_state.externally_progressed:
-            print("Externally progressed state!")
+            print(
+                f"Warning: trying to progress externally progressed state {self.state}!"
+            )
             return None
         try:
             next_state = await current_state.handler(self)
@@ -183,7 +187,7 @@ class StatorModel(models.Model):
             state_changed=timezone.now(),
             state_attempted=None,
             state_locked_until=None,
-            state_ready=False,
+            state_ready=True,
         )
 
     atransition_perform = sync_to_async(transition_perform)
diff --git a/takahe/settings/base.py b/takahe/settings/base.py
index 4808d97..e45133d 100644
--- a/takahe/settings/base.py
+++ b/takahe/settings/base.py
@@ -12,6 +12,7 @@ INSTALLED_APPS = [
     "django.contrib.sessions",
     "django.contrib.messages",
     "django.contrib.staticfiles",
+    "django_htmx",
     "core",
     "activities",
     "users",
@@ -26,6 +27,7 @@ MIDDLEWARE = [
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "django_htmx.middleware.HtmxMiddleware",
     "users.middleware.IdentityMiddleware",
 ]
 
diff --git a/takahe/urls.py b/takahe/urls.py
index bebd63a..a87ec87 100644
--- a/takahe/urls.py
+++ b/takahe/urls.py
@@ -1,7 +1,7 @@
 from django.contrib import admin
 from django.urls import path
 
-from activities.views import timelines
+from activities.views import posts, timelines
 from core import views as core
 from stator import views as stator
 from users.views import activitypub, auth, identity
@@ -12,14 +12,20 @@ urlpatterns = [
     path("notifications/", timelines.Notifications.as_view()),
     path("local/", timelines.Local.as_view()),
     path("federated/", timelines.Federated.as_view()),
-    # Authentication
-    path("auth/login/", auth.Login.as_view()),
-    path("auth/logout/", auth.Logout.as_view()),
     # Identity views
     path("@<handle>/", identity.ViewIdentity.as_view()),
     path("@<handle>/actor/", activitypub.Actor.as_view()),
     path("@<handle>/actor/inbox/", activitypub.Inbox.as_view()),
     path("@<handle>/action/", identity.ActionIdentity.as_view()),
+    # Posts
+    path("@<handle>/posts/<int:post_id>/", posts.Post.as_view()),
+    path("@<handle>/posts/<int:post_id>/like/", posts.Like.as_view()),
+    path("@<handle>/posts/<int:post_id>/unlike/", posts.Like.as_view(undo=True)),
+    path("@<handle>/posts/<int:post_id>/boost/", posts.Boost.as_view()),
+    path("@<handle>/posts/<int:post_id>/unboost/", posts.Boost.as_view(undo=True)),
+    # Authentication
+    path("auth/login/", auth.Login.as_view()),
+    path("auth/logout/", auth.Logout.as_view()),
     # Identity selection
     path("@<handle>/activate/", identity.ActivateIdentity.as_view()),
     path("identity/select/", identity.SelectIdentity.as_view()),
diff --git a/templates/activities/_boost.html b/templates/activities/_boost.html
index 601466e..8e90045 100644
--- a/templates/activities/_boost.html
+++ b/templates/activities/_boost.html
@@ -1,28 +1,9 @@
-{% load static %}
-{% load activity_tags %}
-<div class="post">
-
-    {% if post.author.icon_uri %}
-        <img src="{{post.author.icon_uri}}" class="icon">
-    {% else %}
-        <img src="{% static "img/unknown-icon-128.png" %}" class="icon">
-    {% endif %}
-
-    <time>
-        <a href="{{ post.url }}">
-            {% if post.published %}
-                {{ post.published | timedeltashort }}
-            {% else %}
-                {{ post.created | timedeltashort }}
-            {% endif %}
-        </a>
-    </time>
-
-    <a href="{{ post.author.urls.view }}" class="handle">
-        {{ post.author.name_or_handle }} <small>@{{ post.author.handle }}</small>
+{% if post.pk in interactions.boost %}
+    <a title="Unboost" class="active" hx-post="{{ post.urls.action_unboost }}" hx-swap="outerHTML">
+        <i class="fa-solid fa-retweet"></i>
     </a>
-
-    <div class="content">
-        {{ post.safe_content }}
-    </div>
-</div>
+{% else %}
+    <a title="Boost" hx-post="{{ post.urls.action_boost }}" hx-swap="outerHTML">
+        <i class="fa-solid fa-retweet"></i>
+    </a>
+{% endif %}
diff --git a/templates/activities/_like.html b/templates/activities/_like.html
new file mode 100644
index 0000000..8eec8cd
--- /dev/null
+++ b/templates/activities/_like.html
@@ -0,0 +1,9 @@
+{% if post.pk in interactions.like %}
+    <a title="Unlike" class="active" hx-post="{{ post.urls.action_unlike }}" hx-swap="outerHTML">
+        <i class="fa-solid fa-star"></i>
+    </a>
+{% else %}
+    <a title="Like" hx-post="{{ post.urls.action_like }}" hx-swap="outerHTML">
+        <i class="fa-solid fa-star"></i>
+    </a>
+{% endif %}
diff --git a/templates/activities/_post.html b/templates/activities/_post.html
index bf4b189..ac21c42 100644
--- a/templates/activities/_post.html
+++ b/templates/activities/_post.html
@@ -25,4 +25,11 @@
     <div class="content">
         {{ post.safe_content }}
     </div>
+
+    {% if request.identity %}
+    <div class="actions">
+        {% include "activities/_like.html" %}
+        {% include "activities/_boost.html" %}
+    </div>
+    {% endif %}
 </div>
diff --git a/templates/activities/post.html b/templates/activities/post.html
new file mode 100644
index 0000000..b44df40
--- /dev/null
+++ b/templates/activities/post.html
@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+
+{% block title %}Post by {{ post.author.name_or_handle }}{% endblock %}
+
+{% block content %}
+    <nav>
+        <a href="." class="selected">Post</a>
+    </nav>
+
+    <section class="columns">
+
+        <div class="left-column">
+            {% include "activities/_post.html" %}
+        </div>
+
+    </section>
+{% endblock %}
diff --git a/templates/base.html b/templates/base.html
index d50fdcf..e465f05 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -9,9 +9,10 @@
     <link rel="stylesheet" href="{% static "fonts/raleway/raleway.css" %}" type="text/css" />
     <link rel="stylesheet" href="{% static "fonts/font_awesome/all.min.css" %}" type="text/css" />
     <script src="{% static "js/hyperscript.min.js" %}"></script>
+    <script src="{% static "js/htmx.min.js" %}"></script>
     {% block extra_head %}{% endblock %}
 </head>
-<body class="{% block body_class %}{% endblock %}">
+<body class="{% block body_class %}{% endblock %}" hx-headers='{"X-CSRFToken": "{{ csrf_token }}"}'>
 
     <main>
         <header>
diff --git a/users/admin.py b/users/admin.py
index e52e41c..dfd72e7 100644
--- a/users/admin.py
+++ b/users/admin.py
@@ -23,12 +23,17 @@ class IdentityAdmin(admin.ModelAdmin):
     list_display = ["id", "handle", "actor_uri", "state", "local"]
     raw_id_fields = ["users"]
     actions = ["force_update"]
+    readonly_fields = ["actor_json"]
 
     @admin.action(description="Force Update")
     def force_update(self, request, queryset):
         for instance in queryset:
             instance.transition_perform("outdated")
 
+    @admin.display(description="ActivityPub JSON")
+    def actor_json(self, instance):
+        return instance.to_ap()
+
 
 @admin.register(Follow)
 class FollowAdmin(admin.ModelAdmin):
diff --git a/users/models/identity.py b/users/models/identity.py
index 96e09c8..15caef4 100644
--- a/users/models/identity.py
+++ b/users/models/identity.py
@@ -102,8 +102,8 @@ class Identity(StatorModel):
         unique_together = [("username", "domain")]
 
     class urls(urlman.Urls):
+        view_nice = "{self._nice_view_url}"
         view = "/@{self.username}@{self.domain_id}/"
-        view_short = "/@{self.username}/"
         action = "{view}action/"
         activate = "{view}activate/"
 
@@ -118,6 +118,15 @@ class Identity(StatorModel):
             return self.handle
         return self.actor_uri
 
+    def _nice_view_url(self):
+        """
+        Returns the "nice" user URL if they're local, otherwise our general one
+        """
+        if self.local:
+            return f"https://{self.domain.uri_domain}/@{self.username}/"
+        else:
+            return f"/@{self.username}@{self.domain_id}/"
+
     ### Alternate constructors/fetchers ###
 
     @classmethod
@@ -182,6 +191,28 @@ class Identity(StatorModel):
         # TODO: Setting
         return self.data_age > 60 * 24 * 24
 
+    ### ActivityPub (boutbound) ###
+
+    def to_ap(self):
+        response = {
+            "id": self.actor_uri,
+            "type": "Person",
+            "inbox": self.actor_uri + "inbox/",
+            "preferredUsername": self.username,
+            "publicKey": {
+                "id": self.public_key_id,
+                "owner": self.actor_uri,
+                "publicKeyPem": self.public_key,
+            },
+            "published": self.created.strftime("%Y-%m-%dT%H:%M:%SZ"),
+            "url": self.urls.view_nice,
+        }
+        if self.name:
+            response["name"] = self.name
+        if self.summary:
+            response["summary"] = self.summary
+        return response
+
     ### Actor/Webfinger fetching ###
 
     @classmethod
diff --git a/users/models/inbox_message.py b/users/models/inbox_message.py
index 6dbf5e8..b9bcfb4 100644
--- a/users/models/inbox_message.py
+++ b/users/models/inbox_message.py
@@ -46,6 +46,14 @@ class InboxMessageStates(StateGraph):
                         raise ValueError(
                             f"Cannot handle activity of type undo.{unknown}"
                         )
+            case "delete":
+                match instance.message_object_type:
+                    case "tombstone":
+                        await sync_to_async(Post.handle_delete_ap)(instance.message)
+                    case unknown:
+                        raise ValueError(
+                            f"Cannot handle activity of type delete.{unknown}"
+                        )
             case unknown:
                 raise ValueError(f"Cannot handle activity of type {unknown}")
         return cls.processed
diff --git a/users/views/activitypub.py b/users/views/activitypub.py
index 1a709ac..f1abb06 100644
--- a/users/views/activitypub.py
+++ b/users/views/activitypub.py
@@ -52,13 +52,13 @@ class Webfinger(View):
             {
                 "subject": f"acct:{identity.handle}",
                 "aliases": [
-                    identity.urls.view_short.full(),
+                    identity.view_url,
                 ],
                 "links": [
                     {
                         "rel": "http://webfinger.net/rel/profile-page",
                         "type": "text/html",
-                        "href": identity.urls.view_short.full(),
+                        "href": identity.view_url,
                     },
                     {
                         "rel": "self",
@@ -77,28 +77,7 @@ class Actor(View):
 
     def get(self, request, handle):
         identity = by_handle_or_404(self.request, handle)
-        response = {
-            "@context": [
-                "https://www.w3.org/ns/activitystreams",
-                "https://w3id.org/security/v1",
-            ],
-            "id": identity.actor_uri,
-            "type": "Person",
-            "inbox": identity.actor_uri + "inbox/",
-            "preferredUsername": identity.username,
-            "publicKey": {
-                "id": identity.public_key_id,
-                "owner": identity.actor_uri,
-                "publicKeyPem": identity.public_key,
-            },
-            "published": identity.created.strftime("%Y-%m-%dT%H:%M:%SZ"),
-            "url": identity.urls.view_short.full(),
-        }
-        if identity.name:
-            response["name"] = identity.name
-        if identity.summary:
-            response["summary"] = identity.summary
-        return JsonResponse(canonicalise(response, include_security=True))
+        return JsonResponse(canonicalise(identity.to_ap(), include_security=True))
 
 
 @method_decorator(csrf_exempt, name="dispatch")