Merge branch 'develop' into feature/database-compaction

lib/pleroma/activity.ex

@@ -1,18 +1,76 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Activity do
   use Ecto.Schema
-  alias Pleroma.{Repo, Activity, Notification, Object}
-  import Ecto.{Query, Changeset}
+
+  alias Pleroma.Activity
+  alias Pleroma.Notification
+  alias Pleroma.Object
+  alias Pleroma.Repo
+
+  import Ecto.Changeset
+  import Ecto.Query
+
+  @type t :: %__MODULE__{}
+  @primary_key {:id, Pleroma.FlakeId, autogenerate: true}
+
+  # https://github.com/tootsuite/mastodon/blob/master/app/models/notification.rb#L19
+  @mastodon_notification_types %{
+    "Create" => "mention",
+    "Follow" => "follow",
+    "Announce" => "reblog",
+    "Like" => "favourite"
+  }
+
+  @mastodon_to_ap_notification_types for {k, v} <- @mastodon_notification_types,
+                                         into: %{},
+                                         do: {v, k}
 
   schema "activities" do
     field(:data, :map)
     field(:local, :boolean, default: true)
     field(:actor, :string)
-    field(:recipients, {:array, :string})
+    field(:recipients, {:array, :string}, default: [])
     has_many(:notifications, Notification, on_delete: :delete_all)
 
+    # Attention: this is a fake relation, don't try to preload it blindly and expect it to work!
+    # The foreign key is embedded in a jsonb field.
+    #
+    # To use it, you probably want to do an inner join and a preload:
+    #
+    # ```
+    # |> join(:inner, [activity], o in Object,
+    #      on: fragment("(?->>'id') = COALESCE((?)->'object'->> 'id', (?)->>'object')",
+    #        o.data, activity.data, activity.data))
+    # |> preload([activity, object], [object: object])
+    # ```
+    #
+    # As a convenience, Activity.with_preloaded_object() sets up an inner join and preload for the
+    # typical case.
+    has_one(:object, Object, on_delete: :nothing, foreign_key: :id)
+
     timestamps()
   end
 
+  def with_preloaded_object(query) do
+    query
+    |> join(
+      :inner,
+      [activity],
+      o in Object,
+      on:
+        fragment(
+          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
+          o.data,
+          activity.data,
+          activity.data
+        )
+    )
+    |> preload([activity, object], object: object)
+  end
+
   def get_by_ap_id(ap_id) do
     Repo.one(
       from(
@@ -29,25 +87,45 @@ defmodule Pleroma.Activity do
     |> unique_constraint(:ap_id, name: :activities_unique_apid_index)
   end
 
-  # TODO:
-  # Go through these and fix them everywhere.
-  # Wrong name, only returns create activities
-  def all_by_object_ap_id_q(ap_id) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-          activity.data,
-          activity.data,
-          ^to_string(ap_id)
-        ),
-      where: fragment("(?)->>'type' = 'Create'", activity.data)
+  def get_by_ap_id_with_object(ap_id) do
+    Repo.one(
+      from(
+        activity in Activity,
+        where: fragment("(?)->>'id' = ?", activity.data, ^to_string(ap_id)),
+        left_join: o in Object,
+        on:
+          fragment(
+            "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
+            o.data,
+            activity.data,
+            activity.data
+          ),
+        preload: [object: o]
+      )
     )
   end
 
-  # Wrong name, returns all.
-  def all_non_create_by_object_ap_id_q(ap_id) do
+  def get_by_id(id) do
+    Repo.get(Activity, id)
+  end
+
+  def get_by_id_with_object(id) do
+    from(activity in Activity,
+      where: activity.id == ^id,
+      inner_join: o in Object,
+      on:
+        fragment(
+          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
+          o.data,
+          activity.data,
+          activity.data
+        ),
+      preload: [object: o]
+    )
+    |> Repo.one()
+  end
+
+  def by_object_ap_id(ap_id) do
     from(
       activity in Activity,
       where:
@@ -60,12 +138,7 @@ defmodule Pleroma.Activity do
     )
   end
 
-  # Wrong name plz fix thx
-  def all_by_object_ap_id(ap_id) do
-    Repo.all(all_by_object_ap_id_q(ap_id))
-  end
-
-  def create_activity_by_object_id_query(ap_ids) do
+  def create_by_object_ap_id(ap_ids) when is_list(ap_ids) do
     from(
       activity in Activity,
       where:
@@ -79,19 +152,66 @@ defmodule Pleroma.Activity do
     )
   end
 
-  def get_create_activity_by_object_ap_id(ap_id) when is_binary(ap_id) do
-    create_activity_by_object_id_query([ap_id])
+  def create_by_object_ap_id(ap_id) when is_binary(ap_id) do
+    from(
+      activity in Activity,
+      where:
+        fragment(
+          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
+          activity.data,
+          activity.data,
+          ^to_string(ap_id)
+        ),
+      where: fragment("(?)->>'type' = 'Create'", activity.data)
+    )
+  end
+
+  def create_by_object_ap_id(_), do: nil
+
+  def get_all_create_by_object_ap_id(ap_id) do
+    Repo.all(create_by_object_ap_id(ap_id))
+  end
+
+  def get_create_by_object_ap_id(ap_id) when is_binary(ap_id) do
+    create_by_object_ap_id(ap_id)
     |> Repo.one()
   end
 
-  def get_create_activity_by_object_ap_id(_), do: nil
+  def get_create_by_object_ap_id(_), do: nil
 
-  def normalize(obj) when is_map(obj), do: normalize(obj["id"])
-  def normalize(ap_id) when is_binary(ap_id), do: get_by_ap_id(ap_id)
-  def normalize(_), do: nil
+  def create_by_object_ap_id_with_object(ap_id) when is_binary(ap_id) do
+    from(
+      activity in Activity,
+      where:
+        fragment(
+          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
+          activity.data,
+          activity.data,
+          ^to_string(ap_id)
+        ),
+      where: fragment("(?)->>'type' = 'Create'", activity.data),
+      inner_join: o in Object,
+      on:
+        fragment(
+          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
+          o.data,
+          activity.data,
+          activity.data
+        ),
+      preload: [object: o]
+    )
+  end
+
+  def create_by_object_ap_id_with_object(_), do: nil
+
+  def get_create_by_object_ap_id_with_object(ap_id) do
+    ap_id
+    |> create_by_object_ap_id_with_object()
+    |> Repo.one()
+  end
 
   defp get_in_reply_to_activity_from_object(%Object{data: %{"inReplyTo" => ap_id}}) do
-    get_create_activity_by_object_ap_id(ap_id)
+    get_create_by_object_ap_id_with_object(ap_id)
   end
 
   defp get_in_reply_to_activity_from_object(_), do: nil
@@ -99,4 +219,92 @@ defmodule Pleroma.Activity do
   def get_in_reply_to_activity(%Activity{data: %{"object" => object}}) do
     get_in_reply_to_activity_from_object(Object.normalize(object))
   end
+
+  def normalize(obj) when is_map(obj), do: get_by_ap_id_with_object(obj["id"])
+  def normalize(ap_id) when is_binary(ap_id), do: get_by_ap_id_with_object(ap_id)
+  def normalize(_), do: nil
+
+  def delete_by_ap_id(id) when is_binary(id) do
+    by_object_ap_id(id)
+    |> select([u], u)
+    |> Repo.delete_all()
+    |> elem(1)
+    |> Enum.find(fn
+      %{data: %{"type" => "Create", "object" => %{"id" => ap_id}}} -> ap_id == id
+      _ -> nil
+    end)
+  end
+
+  def delete_by_ap_id(_), do: nil
+
+  for {ap_type, type} <- @mastodon_notification_types do
+    def mastodon_notification_type(%Activity{data: %{"type" => unquote(ap_type)}}),
+      do: unquote(type)
+  end
+
+  def mastodon_notification_type(%Activity{}), do: nil
+
+  def from_mastodon_notification_type(type) do
+    Map.get(@mastodon_to_ap_notification_types, type)
+  end
+
+  def all_by_actor_and_id(actor, status_ids \\ [])
+  def all_by_actor_and_id(_actor, []), do: []
+
+  def all_by_actor_and_id(actor, status_ids) do
+    Activity
+    |> where([s], s.id in ^status_ids)
+    |> where([s], s.actor == ^actor)
+    |> Repo.all()
+  end
+
+  def increase_replies_count(nil), do: nil
+
+  def increase_replies_count(object_ap_id) do
+    from(a in create_by_object_ap_id(object_ap_id),
+      update: [
+        set: [
+          data:
+            fragment(
+              """
+              jsonb_set(?, '{object, repliesCount}',
+                (coalesce((?->'object'->>'repliesCount')::int, 0) + 1)::varchar::jsonb, true)
+              """,
+              a.data,
+              a.data
+            )
+        ]
+      ]
+    )
+    |> Repo.update_all([])
+    |> case do
+      {1, [activity]} -> activity
+      _ -> {:error, "Not found"}
+    end
+  end
+
+  def decrease_replies_count(nil), do: nil
+
+  def decrease_replies_count(object_ap_id) do
+    from(a in create_by_object_ap_id(object_ap_id),
+      update: [
+        set: [
+          data:
+            fragment(
+              """
+              jsonb_set(?, '{object, repliesCount}',
+                (greatest(0, (?->'object'->>'repliesCount')::int - 1))::varchar::jsonb, true)
+              """,
+              a.data,
+              a.data
+            )
+        ]
+      ]
+    )
+    |> Repo.update_all([])
+    |> case do
+      {1, [activity]} -> activity
+      _ -> {:error, "Not found"}
+    end
+  end
 end