Merge branch 'conversations_three' into 'develop'

Conversations once more.

See merge request pleroma/pleroma!1119

priv/repo/migrations/20190408123347_create_conversations.exs

@@ -0,0 +1,26 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Repo.Migrations.CreateConversations do
+  use Ecto.Migration
+
+  def change do
+    create table(:conversations) do
+      add(:ap_id, :string, null: false)
+      timestamps()
+    end
+
+    create table(:conversation_participations) do
+      add(:user_id, references(:users, type: :uuid, on_delete: :delete_all))
+      add(:conversation_id, references(:conversations, on_delete: :delete_all))
+      add(:read, :boolean, default: false)
+
+      timestamps()
+    end
+
+    create index(:conversation_participations, [:conversation_id])
+    create unique_index(:conversation_participations, [:user_id, :conversation_id])
+    create unique_index(:conversations, [:ap_id])
+  end
+end

priv/repo/migrations/20190410152859_add_participation_updated_at_index.exs

@@ -0,0 +1,7 @@
+defmodule Pleroma.Repo.Migrations.AddParticipationUpdatedAtIndex do
+  use Ecto.Migration
+
+  def change do
+    create index(:conversation_participations, ["updated_at desc"])
+  end
+end