Add conversations API (#8832)

* Add conversations API

* Add web UI for conversations

* Add test for conversations API

* Add tests for ConversationAccount

* Improve web UI

* Rename ConversationAccount to AccountConversation

* Remove conversations on block and mute

* Change last_status_id to be a denormalization of status_ids

* Add optimistic locking

1 files changed, 14 insertions, 0 deletions

diff --git a/db/migrate/20180929222014_create_account_conversations.rb b/db/migrate/20180929222014_create_account_conversations.rb
new file mode 100644
index 000000000..53fa137e1
--- /dev/null
+++ b/db/migrate/20180929222014_create_account_conversations.rb
@@ -0,0 +1,14 @@
+class CreateAccountConversations < ActiveRecord::Migration[5.2]
+  def change
+    create_table :account_conversations do |t|
+      t.belongs_to :account, foreign_key: { on_delete: :cascade }
+      t.belongs_to :conversation, foreign_key: { on_delete: :cascade }
+      t.bigint :participant_account_ids, array: true, null: false, default: []
+      t.bigint :status_ids, array: true, null: false, default: []
+      t.bigint :last_status_id, null: true, default: nil
+      t.integer :lock_version, null: false, default: 0
+    end
+
+    add_index :account_conversations, [:account_id, :conversation_id, :participant_account_ids], unique: true, name: 'index_unique_conversations'
+  end
+end