X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fweb%2Factivity_pub%2Futils.ex;h=266667f8109720ee05ae35374800147eaddf3b31;hb=833161b5d21f85e2276cd0cee3e148ecbe6e1f05;hp=ac20a282266b635ab17cbbe681e23c2e6031bbe7;hpb=d5a13c10ac6a9a5f8dbb1932ffc85260f079a2dc;p=akkoma

diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index ac20a2822..6a89374d0 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -1,12 +1,110 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Web.ActivityPub.Utils do
-  alias Pleroma.{Repo, Web, Object, Activity, User}
+  alias Pleroma.Repo
+  alias Pleroma.Web
+  alias Pleroma.Object
+  alias Pleroma.Activity
+  alias Pleroma.User
+  alias Pleroma.Notification
   alias Pleroma.Web.Router.Helpers
   alias Pleroma.Web.Endpoint
-  alias Ecto.{Changeset, UUID}
+  alias Ecto.Changeset
+  alias Ecto.UUID
+
   import Ecto.Query
 
+  require Logger
+
+  @supported_object_types ["Article", "Note", "Video", "Page"]
+
+  # Some implementations send the actor URI as the actor field, others send the entire actor object,
+  # so figure out what the actor's URI is based on what we have.
+  def get_ap_id(object) do
+    case object do
+      %{"id" => id} -> id
+      id -> id
+    end
+  end
+
+  def normalize_params(params) do
+    Map.put(params, "actor", get_ap_id(params["actor"]))
+  end
+
+  def determine_explicit_mentions(%{"tag" => tag} = _object) when is_list(tag) do
+    tag
+    |> Enum.filter(fn x -> is_map(x) end)
+    |> Enum.filter(fn x -> x["type"] == "Mention" end)
+    |> Enum.map(fn x -> x["href"] end)
+  end
+
+  def determine_explicit_mentions(%{"tag" => tag} = object) when is_map(tag) do
+    Map.put(object, "tag", [tag])
+    |> determine_explicit_mentions()
+  end
+
+  def determine_explicit_mentions(_), do: []
+
+  defp recipient_in_collection(ap_id, coll) when is_binary(coll), do: ap_id == coll
+  defp recipient_in_collection(ap_id, coll) when is_list(coll), do: ap_id in coll
+  defp recipient_in_collection(_, _), do: false
+
+  def recipient_in_message(ap_id, params) do
+    cond do
+      recipient_in_collection(ap_id, params["to"]) ->
+        true
+
+      recipient_in_collection(ap_id, params["cc"]) ->
+        true
+
+      recipient_in_collection(ap_id, params["bto"]) ->
+        true
+
+      recipient_in_collection(ap_id, params["bcc"]) ->
+        true
+
+      # if the message is unaddressed at all, then assume it is directly addressed
+      # to the recipient
+      !params["to"] && !params["cc"] && !params["bto"] && !params["bcc"] ->
+        true
+
+      true ->
+        false
+    end
+  end
+
+  defp extract_list(target) when is_binary(target), do: [target]
+  defp extract_list(lst) when is_list(lst), do: lst
+  defp extract_list(_), do: []
+
+  def maybe_splice_recipient(ap_id, params) do
+    need_splice =
+      !recipient_in_collection(ap_id, params["to"]) &&
+        !recipient_in_collection(ap_id, params["cc"])
+
+    cc_list = extract_list(params["cc"])
+
+    if need_splice do
+      params
+      |> Map.put("cc", [ap_id | cc_list])
+    else
+      params
+    end
+  end
+
+  def make_json_ld_header do
+    %{
+      "@context" => [
+        "https://www.w3.org/ns/activitystreams",
+        "#{Web.base_url()}/schemas/litepub-0.1.jsonld"
+      ]
+    }
+  end
+
   def make_date do
-    DateTime.utc_now() |> DateTime.to_iso8601
+    DateTime.utc_now() |> DateTime.to_iso8601()
   end
 
   def generate_activity_id do
@@ -18,25 +116,58 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def generate_object_id do
-    Helpers.o_status_url(Endpoint, :object, UUID.generate)
+    Helpers.o_status_url(Endpoint, :object, UUID.generate())
   end
 
   def generate_id(type) do
-    "#{Web.base_url()}/#{type}/#{UUID.generate}"
+    "#{Web.base_url()}/#{type}/#{UUID.generate()}"
+  end
+
+  def get_notified_from_object(%{"type" => type} = object) when type in @supported_object_types do
+    fake_create_activity = %{
+      "to" => object["to"],
+      "cc" => object["cc"],
+      "type" => "Create",
+      "object" => object
+    }
+
+    Notification.get_notified_from_activity(%Activity{data: fake_create_activity}, false)
+  end
+
+  def get_notified_from_object(object) do
+    Notification.get_notified_from_activity(%Activity{data: object}, false)
+  end
+
+  def create_context(context) do
+    context = context || generate_id("contexts")
+    changeset = Object.context_mapping(context)
+
+    case Repo.insert(changeset) do
+      {:ok, object} ->
+        object
+
+      # This should be solved by an upsert, but it seems ecto
+      # has problems accessing the constraint inside the jsonb.
+      {:error, _} ->
+        Object.get_cached_by_ap_id(context)
+    end
   end
 
   @doc """
   Enqueues an activity for federation if it's local
   """
   def maybe_federate(%Activity{local: true} = activity) do
-    priority = case activity.data["type"] do
-                 "Delete" -> 10
-                 "Create" -> 1
-                 _ -> 5
-               end
-    Pleroma.Web.Federator.enqueue(:publish, activity, priority)
+    priority =
+      case activity.data["type"] do
+        "Delete" -> 10
+        "Create" -> 1
+        _ -> 5
+      end
+
+    Pleroma.Web.Federator.publish(activity, priority)
     :ok
   end
+
   def maybe_federate(_), do: :ok
 
   @doc """
@@ -44,12 +175,17 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   also adds it to an included object
   """
   def lazy_put_activity_defaults(map) do
-    map = map
-    |> Map.put_new_lazy("id", &generate_activity_id/0)
-    |> Map.put_new_lazy("published", &make_date/0)
+    %{data: %{"id" => context}, id: context_id} = create_context(map["context"])
+
+    map =
+      map
+      |> Map.put_new_lazy("id", &generate_activity_id/0)
+      |> Map.put_new_lazy("published", &make_date/0)
+      |> Map.put_new("context", context)
+      |> Map.put_new("context_id", context_id)
 
     if is_map(map["object"]) do
-      object = lazy_put_object_defaults(map["object"])
+      object = lazy_put_object_defaults(map["object"], map)
       %{map | "object" => object}
     else
       map
@@ -59,20 +195,24 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   @doc """
   Adds an id and published date if they aren't there.
   """
-  def lazy_put_object_defaults(map) do
+  def lazy_put_object_defaults(map, activity \\ %{}) do
     map
     |> Map.put_new_lazy("id", &generate_object_id/0)
     |> Map.put_new_lazy("published", &make_date/0)
+    |> Map.put_new("context", activity["context"])
+    |> Map.put_new("context_id", activity["context_id"])
   end
 
   @doc """
   Inserts a full object if it is contained in an activity.
   """
-  def insert_full_object(%{"object" => object_data}) when is_map(object_data) do
+  def insert_full_object(%{"object" => %{"type" => type} = object_data})
+      when is_map(object_data) and type in @supported_object_types do
     with {:ok, _} <- Object.create(object_data) do
       :ok
     end
   end
+
   def insert_full_object(_), do: :ok
 
   def update_object_in_activities(%{data: %{"id" => id}} = object) do
@@ -80,8 +220,9 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     # Update activities that already had this. Could be done in a seperate process.
     # Alternatively, just don't do this and fetch the current object each time. Most
     # could probably be taken from cache.
-    relevant_activities = Activity.all_by_object_ap_id(id)
-    Enum.map(relevant_activities, fn (activity) ->
+    relevant_activities = Activity.get_all_create_by_object_ap_id(id)
+
+    Enum.map(relevant_activities, fn activity ->
       new_activity_data = activity.data |> Map.put("object", object.data)
       changeset = Changeset.change(activity, data: new_activity_data)
       Repo.update(changeset)
@@ -94,21 +235,52 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   Returns an existing like if a user already liked an object
   """
   def get_existing_like(actor, %{data: %{"id" => id}}) do
-    query = from activity in Activity,
-      where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
-      # this is to use the index
-      where: fragment("coalesce((?)->'object'->>'id', (?)->>'object') = ?", activity.data, activity.data, ^id),
-      where: fragment("(?)->>'type' = 'Like'", activity.data)
+    query =
+      from(
+        activity in Activity,
+        where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
+        # this is to use the index
+        where:
+          fragment(
+            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
+            activity.data,
+            activity.data,
+            ^id
+          ),
+        where: fragment("(?)->>'type' = 'Like'", activity.data)
+      )
 
     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",
       "actor" => ap_id,
       "object" => id,
       "to" => [actor.follower_address, object.data["actor"]],
+      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
       "context" => object.data["context"]
     }
 
@@ -116,10 +288,13 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def update_element_in_object(property, element, object) do
-    with new_data <- object.data |> Map.put("#{property}_count", length(element)) |> Map.put("#{property}s", element),
+    with new_data <-
+           object.data
+           |> Map.put("#{property}_count", length(element))
+           |> Map.put("#{property}s", element),
          changeset <- Changeset.change(object, data: new_data),
-         {:ok, object} <- Repo.update(changeset),
-          _ <- update_object_in_activities(object) do
+         {:ok, object} <- Object.update_and_set_cache(changeset),
+         _ <- update_object_in_activities(object) do
       {:ok, object}
     end
   end
@@ -129,77 +304,284 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
-    with likes <- [actor | (object.data["likes"] || [])] |> Enum.uniq do
+    likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
+
+    with likes <- [actor | likes] |> Enum.uniq() do
       update_likes_in_object(likes, object)
     end
   end
 
   def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
-    with likes <- (object.data["likes"] || []) |> List.delete(actor) do
+    likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
+
+    with likes <- likes |> List.delete(actor) do
       update_likes_in_object(likes, object)
     end
   end
 
   #### Follow-related helpers
 
+  @doc """
+  Updates a follow activity's state (for locked accounts).
+  """
+  def update_follow_state(
+        %Activity{data: %{"actor" => actor, "object" => object, "state" => "pending"}} = activity,
+        state
+      ) do
+    try do
+      Ecto.Adapters.SQL.query!(
+        Repo,
+        "UPDATE activities SET data = jsonb_set(data, '{state}', $1) WHERE data->>'type' = 'Follow' AND data->>'actor' = $2 AND data->>'object' = $3 AND data->>'state' = 'pending'",
+        [state, actor, object]
+      )
+
+      activity = Repo.get(Activity, activity.id)
+      {:ok, activity}
+    rescue
+      e ->
+        {:error, e}
+    end
+  end
+
+  def update_follow_state(%Activity{} = activity, state) do
+    with new_data <-
+           activity.data
+           |> Map.put("state", state),
+         changeset <- Changeset.change(activity, data: new_data),
+         {:ok, activity} <- Repo.update(changeset) do
+      {:ok, activity}
+    end
+  end
+
   @doc """
   Makes a follow activity data for the given follower and followed
   """
-  def make_follow_data(%User{ap_id: follower_id}, %User{ap_id: followed_id}, activity_id) do
+  def make_follow_data(
+        %User{ap_id: follower_id},
+        %User{ap_id: followed_id} = _followed,
+        activity_id
+      ) do
     data = %{
       "type" => "Follow",
       "actor" => follower_id,
       "to" => [followed_id],
-      "object" => followed_id
+      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
+      "object" => followed_id,
+      "state" => "pending"
     }
 
-    if activity_id, do: Map.put(data, "id", activity_id), else: data
+    data = if activity_id, do: Map.put(data, "id", activity_id), else: data
+
+    data
   end
 
-  def fetch_latest_follow(%User{ap_id: follower_id},
-                          %User{ap_id: followed_id}) do
-    query = from activity in Activity,
-      where: fragment("? @> ?", activity.data, ^%{type: "Follow", actor: follower_id,
-                                                  object: followed_id}),
-      order_by: [desc: :id],
-      limit: 1
+  def fetch_latest_follow(%User{ap_id: follower_id}, %User{ap_id: followed_id}) do
+    query =
+      from(
+        activity in Activity,
+        where:
+          fragment(
+            "? ->> 'type' = 'Follow'",
+            activity.data
+          ),
+        where: activity.actor == ^follower_id,
+        where:
+          fragment(
+            "? @> ?",
+            activity.data,
+            ^%{object: followed_id}
+          ),
+        order_by: [desc: :id],
+        limit: 1
+      )
+
     Repo.one(query)
   end
 
   #### Announce-related helpers
 
+  @doc """
+  Retruns an existing announce activity if the notice has already been announced
+  """
+  def get_existing_announce(actor, %{data: %{"id" => id}}) do
+    query =
+      from(
+        activity in Activity,
+        where: activity.actor == ^actor,
+        # this is to use the index
+        where:
+          fragment(
+            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
+            activity.data,
+            activity.data,
+            ^id
+          ),
+        where: fragment("(?)->>'type' = 'Announce'", activity.data)
+      )
+
+    Repo.one(query)
+  end
+
   @doc """
   Make announce activity data for the given actor and object
   """
-  def make_announce_data(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object, activity_id) do
+  # for relayed messages, we only want to send to subscribers
+  def make_announce_data(
+        %User{ap_id: ap_id} = user,
+        %Object{data: %{"id" => id}} = object,
+        activity_id,
+        false
+      ) do
+    data = %{
+      "type" => "Announce",
+      "actor" => ap_id,
+      "object" => id,
+      "to" => [user.follower_address],
+      "cc" => [],
+      "context" => object.data["context"]
+    }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
+  end
+
+  def make_announce_data(
+        %User{ap_id: ap_id} = user,
+        %Object{data: %{"id" => id}} = object,
+        activity_id,
+        true
+      ) do
     data = %{
       "type" => "Announce",
       "actor" => ap_id,
       "object" => id,
       "to" => [user.follower_address, object.data["actor"]],
+      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
       "context" => object.data["context"]
     }
 
     if activity_id, do: Map.put(data, "id", activity_id), else: data
   end
 
-  def add_announce_to_object(%Activity{data: %{"actor" => actor}}, object) do
-    with announcements <- [actor | (object.data["announcements"] || [])] |> Enum.uniq do
+  @doc """
+  Make unannounce activity data for the given actor and object
+  """
+  def make_unannounce_data(
+        %User{ap_id: ap_id} = user,
+        %Activity{data: %{"context" => context}} = activity,
+        activity_id
+      ) do
+    data = %{
+      "type" => "Undo",
+      "actor" => ap_id,
+      "object" => activity.data,
+      "to" => [user.follower_address, activity.data["actor"]],
+      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
+      "context" => context
+    }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
+  end
+
+  def make_unlike_data(
+        %User{ap_id: ap_id} = user,
+        %Activity{data: %{"context" => context}} = activity,
+        activity_id
+      ) do
+    data = %{
+      "type" => "Undo",
+      "actor" => ap_id,
+      "object" => activity.data,
+      "to" => [user.follower_address, activity.data["actor"]],
+      "cc" => ["https://www.w3.org/ns/activitystreams#Public"],
+      "context" => context
+    }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
+  end
+
+  def add_announce_to_object(
+        %Activity{
+          data: %{"actor" => actor, "cc" => ["https://www.w3.org/ns/activitystreams#Public"]}
+        },
+        object
+      ) do
+    announcements =
+      if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
+
+    with announcements <- [actor | announcements] |> Enum.uniq() do
+      update_element_in_object("announcement", announcements, object)
+    end
+  end
+
+  def add_announce_to_object(_, object), do: {:ok, object}
+
+  def remove_announce_from_object(%Activity{data: %{"actor" => actor}}, object) do
+    announcements =
+      if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
+
+    with announcements <- announcements |> List.delete(actor) do
       update_element_in_object("announcement", announcements, object)
     end
   end
 
   #### Unfollow-related helpers
 
-  def make_unfollow_data(follower, followed, follow_activity) do
-    %{
+  def make_unfollow_data(follower, followed, follow_activity, activity_id) do
+    data = %{
       "type" => "Undo",
       "actor" => follower.ap_id,
       "to" => [followed.ap_id],
-      "object" => follow_activity.data["id"]
+      "object" => follow_activity.data
+    }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
+  end
+
+  #### Block-related helpers
+  def fetch_latest_block(%User{ap_id: blocker_id}, %User{ap_id: blocked_id}) do
+    query =
+      from(
+        activity in Activity,
+        where:
+          fragment(
+            "? ->> 'type' = 'Block'",
+            activity.data
+          ),
+        where: activity.actor == ^blocker_id,
+        where:
+          fragment(
+            "? @> ?",
+            activity.data,
+            ^%{object: blocked_id}
+          ),
+        order_by: [desc: :id],
+        limit: 1
+      )
+
+    Repo.one(query)
+  end
+
+  def make_block_data(blocker, blocked, activity_id) do
+    data = %{
+      "type" => "Block",
+      "actor" => blocker.ap_id,
+      "to" => [blocked.ap_id],
+      "object" => blocked.ap_id
     }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
   end
 
+  def make_unblock_data(blocker, blocked, block_activity, activity_id) do
+    data = %{
+      "type" => "Undo",
+      "actor" => blocker.ap_id,
+      "to" => [blocked.ap_id],
+      "object" => block_activity.data
+    }
+
+    if activity_id, do: Map.put(data, "id", activity_id), else: data
+  end
 
   #### Create-related helpers
 
@@ -208,7 +590,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
 
     %{
       "type" => "Create",
-      "to" => params.to |> Enum.uniq,
+      "to" => params.to |> Enum.uniq(),
       "actor" => params.actor.ap_id,
       "object" => params.object,
       "published" => published,