Fix merge conflict

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -515,15 +515,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp restrict_reblogs(query, _), do: query
 
-  # Only search through last 100_000 activities by default
-  defp restrict_recent(query, %{"whole_db" => true}), do: query
-
-  defp restrict_recent(query, _) do
-    since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
-
-    from(activity in query, where: activity.id > ^since)
-  end
-
   defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
     blocks = info.blocks || []
     domain_blocks = info.domain_blocks || []
@@ -574,7 +565,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     |> restrict_actor(opts)
     |> restrict_type(opts)
     |> restrict_favorited_by(opts)
-    |> restrict_recent(opts)
     |> restrict_blocked(opts)
     |> restrict_media(opts)
     |> restrict_visibility(opts)

lib/pleroma/web/activity_pub/activity_pub_controller.ex

@@ -54,6 +54,36 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     end
   end
 
+  def object_likes(conn, %{"uuid" => uuid, "page" => page}) do
+    with ap_id <- o_status_url(conn, :object, uuid),
+         %Object{} = object <- Object.get_cached_by_ap_id(ap_id),
+         {_, true} <- {:public?, ActivityPub.is_public?(object)},
+         likes <- Utils.get_object_likes(object) do
+      {page, _} = Integer.parse(page)
+
+      conn
+      |> put_resp_header("content-type", "application/activity+json")
+      |> json(ObjectView.render("likes.json", ap_id, likes, page))
+    else
+      {:public?, false} ->
+        {:error, :not_found}
+    end
+  end
+
+  def object_likes(conn, %{"uuid" => uuid}) do
+    with ap_id <- o_status_url(conn, :object, uuid),
+         %Object{} = object <- Object.get_cached_by_ap_id(ap_id),
+         {_, true} <- {:public?, ActivityPub.is_public?(object)},
+         likes <- Utils.get_object_likes(object) do
+      conn
+      |> put_resp_header("content-type", "application/activity+json")
+      |> json(ObjectView.render("likes.json", ap_id, likes))
+    else
+      {:public?, false} ->
+        {:error, :not_found}
+    end
+  end
+
   def activity(conn, %{"uuid" => uuid}) do
     with ap_id <- o_status_url(conn, :activity, uuid),
          %Activity{} = activity <- Activity.normalize(ap_id),
@@ -204,6 +234,15 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     end
   end
 
+  def handle_user_activity(user, %{"type" => "Like"} = params) do
+    with %Object{} = object <- Object.normalize(params["object"]),
+         {:ok, activity, _object} <- ActivityPub.like(user, object) do
+      {:ok, activity}
+    else
+      _ -> {:error, "Can't like object"}
+    end
+  end
+
   def handle_user_activity(_, _) do
     {:error, "Unhandled activity type"}
   end

lib/pleroma/web/activity_pub/mrf/no_placeholder_text_policy.ex

@@ -0,0 +1,29 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.NoPlaceholderTextPolicy do
+  @behaviour Pleroma.Web.ActivityPub.MRF
+
+  @impl true
+  def filter(
+        %{
+          "type" => "Create",
+          "object" => %{"content" => content, "attachment" => _attachment} = child_object
+        } = object
+      )
+      when content in [".", "<p>.</p>"] do
+    child_object =
+      child_object
+      |> Map.put("content", "")
+
+    object =
+      object
+      |> Map.put("object", child_object)
+
+    {:ok, object}
+  end
+
+  @impl true
+  def filter(object), do: {:ok, object}
+end

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -629,6 +629,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> add_mention_tags
     |> add_emoji_tags
     |> add_attributed_to
+    |> add_likes
     |> prepare_attachments
     |> set_conversation
     |> set_reply_to_uri
@@ -641,7 +642,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   #  internal -> Mastodon
   #  """
 
-  def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
+  def prepare_outgoing(%{"type" => "Create", "object" => object} = data) do
     object =
       object
       |> prepare_object
@@ -788,6 +789,22 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> Map.put("attributedTo", attributedTo)
   end
 
+  def add_likes(%{"id" => id, "like_count" => likes} = object) do
+    likes = %{
+      "id" => "#{id}/likes",
+      "first" => "#{id}/likes?page=1",
+      "type" => "OrderedCollection",
+      "totalItems" => likes
+    }
+
+    object
+    |> Map.put("likes", likes)
+  end
+
+  def add_likes(object) do
+    object
+  end
+
   def prepare_attachments(object) do
     attachments =
       (object["attachment"] || [])
@@ -803,7 +820,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   defp strip_internal_fields(object) do
     object
     |> Map.drop([
-      "likes",
       "like_count",
       "announcements",
       "announcement_count",

lib/pleroma/web/activity_pub/utils.ex

@@ -231,6 +231,27 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     Repo.one(query)
   end
 
+  @doc """
+  Returns like activities targeting an object
+  """
+  def get_object_likes(%{data: %{"id" => id}}) do
+    query =
+      from(
+        activity in Activity,
+        # this is to use the index
+        where:
+          fragment(
+            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
+            activity.data,
+            activity.data,
+            ^id
+          ),
+        where: fragment("(?)->>'type' = 'Like'", activity.data)
+      )
+
+    Repo.all(query)
+  end
+
   def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
     data = %{
       "type" => "Like",

lib/pleroma/web/activity_pub/views/object_view.ex

@@ -35,4 +35,38 @@ defmodule Pleroma.Web.ActivityPub.ObjectView do
 
     Map.merge(base, additional)
   end
+
+  def render("likes.json", ap_id, likes, page) do
+    collection(likes, "#{ap_id}/likes", page)
+    |> Map.merge(Pleroma.Web.ActivityPub.Utils.make_json_ld_header())
+  end
+
+  def render("likes.json", ap_id, likes) do
+    %{
+      "id" => "#{ap_id}/likes",
+      "type" => "OrderedCollection",
+      "totalItems" => length(likes),
+      "first" => collection(likes, "#{ap_id}/likes", 1)
+    }
+    |> Map.merge(Pleroma.Web.ActivityPub.Utils.make_json_ld_header())
+  end
+
+  def collection(collection, iri, page) do
+    offset = (page - 1) * 10
+    items = Enum.slice(collection, offset, 10)
+    items = Enum.map(items, fn object -> Transmogrifier.prepare_object(object.data) end)
+    total = length(collection)
+
+    map = %{
+      "id" => "#{iri}?page=#{page}",
+      "type" => "OrderedCollectionPage",
+      "partOf" => iri,
+      "totalItems" => total,
+      "orderedItems" => items
+    }
+
+    if offset < total do
+      Map.put(map, "next", "#{iri}?page=#{page + 1}")
+    end
+  end
 end

lib/pleroma/web/common_api/common_api.ex

@@ -103,7 +103,14 @@ defmodule Pleroma.Web.CommonAPI do
              attachments,
              tags,
              get_content_type(data["content_type"]),
-             true
+             Enum.member?(
+               [true, "true"],
+               Map.get(
+                 data,
+                 "no_attachment_links",
+                 Pleroma.Config.get([:instance, :no_attachment_links], false)
+               )
+             )
            ),
          context <- make_context(inReplyTo),
          cw <- data["spoiler_text"],

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -341,7 +341,6 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     params =
       params
       |> Map.put("in_reply_to_status_id", params["in_reply_to_id"])
-      |> Map.put("no_attachment_links", true)
 
     idempotency_key =
       case get_req_header(conn, "idempotency-key") do
@@ -824,9 +823,9 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     json(conn, res)
   end
 
-  def favourites(%{assigns: %{user: user}} = conn, _) do
+  def favourites(%{assigns: %{user: user}} = conn, params) do
     params =
-      %{}
+      params
       |> Map.put("type", "Create")
       |> Map.put("favorited_by", user.ap_id)
       |> Map.put("blocking_user", user)
@@ -836,6 +835,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.reverse()
 
     conn
+    |> add_link_headers(:favourites, activities)
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -32,6 +32,19 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     end)
   end
 
+  defp get_user(ap_id) do
+    cond do
+      user = User.get_cached_by_ap_id(ap_id) ->
+        user
+
+      user = User.get_by_guessed_nickname(ap_id) ->
+        user
+
+      true ->
+        User.error_user(ap_id)
+    end
+  end
+
   def render("index.json", opts) do
     replied_to_activities = get_replied_to_activities(opts.activities)
 
@@ -48,7 +61,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
         "status.json",
         %{activity: %{data: %{"type" => "Announce", "object" => object}} = activity} = opts
       ) do
-    user = User.get_cached_by_ap_id(activity.data["actor"])
+    user = get_user(activity.data["actor"])
     created_at = Utils.to_masto_date(activity.data["published"])
 
     reblogged = Activity.get_create_activity_by_object_ap_id(object)
@@ -93,7 +106,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   end
 
   def render("status.json", %{activity: %{data: %{"object" => object}} = activity} = opts) do
-    user = User.get_cached_by_ap_id(activity.data["actor"])
+    user = get_user(activity.data["actor"])
 
     like_count = object["like_count"] || 0
     announcement_count = object["announcement_count"] || 0
@@ -116,7 +129,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     created_at = Utils.to_masto_date(object["published"])
 
     reply_to = get_reply_to(activity, opts)
-    reply_to_user = reply_to && User.get_cached_by_ap_id(reply_to.data["actor"])
+    reply_to_user = reply_to && get_user(reply_to.data["actor"])
 
     content =
       object

lib/pleroma/web/rich_media/parser.ex

@@ -1,5 +1,9 @@
 defmodule Pleroma.Web.RichMedia.Parser do
-  @parsers [Pleroma.Web.RichMedia.Parsers.OGP, Pleroma.Web.RichMedia.Parsers.TwitterCard]
+  @parsers [
+    Pleroma.Web.RichMedia.Parsers.OGP,
+    Pleroma.Web.RichMedia.Parsers.TwitterCard,
+    Pleroma.Web.RichMedia.Parsers.OEmbed
+  ]
 
   if Mix.env() == :test do
     def parse(url), do: parse_url(url)

lib/pleroma/web/rich_media/parsers/oembed_parser.ex

@@ -0,0 +1,27 @@
+defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do
+  def parse(html, _data) do
+    with elements = [_ | _] <- get_discovery_data(html),
+         {:ok, oembed_url} <- get_oembed_url(elements),
+         {:ok, oembed_data} <- get_oembed_data(oembed_url) do
+      {:ok, oembed_data}
+    else
+      _e -> {:error, "No OEmbed data found"}
+    end
+  end
+
+  defp get_discovery_data(html) do
+    html |> Floki.find("link[type='application/json+oembed']")
+  end
+
+  defp get_oembed_url(nodes) do
+    {"link", attributes, _children} = nodes |> hd()
+
+    {:ok, Enum.into(attributes, %{})["href"]}
+  end
+
+  defp get_oembed_data(url) do
+    {:ok, %Tesla.Env{body: json}} = Pleroma.HTTP.get(url)
+
+    {:ok, Poison.decode!(json)}
+  end
+end

lib/pleroma/web/router.ex

@@ -431,6 +431,7 @@ defmodule Pleroma.Web.Router do
     get("/users/:nickname/followers", ActivityPubController, :followers)
     get("/users/:nickname/following", ActivityPubController, :following)
     get("/users/:nickname/outbox", ActivityPubController, :outbox)
+    get("/objects/:uuid/likes", ActivityPubController, :object_likes)
   end
 
   pipeline :activitypub_client do

lib/pleroma/web/twitter_api/views/activity_view.ex

@@ -101,20 +101,10 @@ defmodule Pleroma.Web.TwitterAPI.ActivityView do
         user
 
       true ->
-        error_user(ap_id)
+        User.error_user(ap_id)
     end
   end
 
-  defp error_user(ap_id) do
-    %User{
-      name: ap_id,
-      ap_id: ap_id,
-      info: %User.Info{},
-      nickname: "erroruser@example.com",
-      inserted_at: NaiveDateTime.utc_now()
-    }
-  end
-
   def render("index.json", opts) do
     context_ids = collect_context_ids(opts.activities)
     users = collect_users(opts.activities)

lib/pleroma/web/websub/websub.ex

@@ -121,6 +121,12 @@ defmodule Pleroma.Web.Websub do
     end
   end
 
+  def incoming_subscription_request(user, params) do
+    Logger.info("Unhandled WebSub request for #{user.nickname}: #{inspect(params)}")
+
+    {:error, "Invalid WebSub request"}
+  end
+
   defp get_subscription(topic, callback) do
     Repo.get_by(WebsubServerSubscription, topic: topic, callback: callback) ||
       %WebsubServerSubscription{}

lib/pleroma/web/websub/websub_controller.ex

@@ -67,6 +67,13 @@ defmodule Pleroma.Web.Websub.WebsubController do
     end
   end
 
+  def websub_subscription_confirmation(conn, params) do
+    Logger.info("Invalid WebSub confirmation request: #{inspect(params)}")
+
+    conn
+    |> send_resp(500, "Invalid parameters")
+  end
+
   def websub_incoming(conn, %{"id" => id}) do
     with "sha1=" <> signature <- hd(get_req_header(conn, "x-hub-signature")),
          signature <- String.downcase(signature),