core: backend for group invitations UI (status, db, updates) (#815)

src/Simplex/Chat/Migrations/M20220715_groups_chat_item_id.hs

@@ -0,0 +1,12 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Migrations.M20220715_groups_chat_item_id where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20220715_groups_chat_item_id :: Query
+m20220715_groups_chat_item_id =
+  [sql|
+ALTER TABLE groups ADD COLUMN chat_item_id INTEGER DEFAULT NULL REFERENCES chat_items ON DELETE SET NULL;
+|]

src/Simplex/Chat/Migrations/chat_schema.sql

@@ -117,7 +117,8 @@ CREATE TABLE groups(
   group_profile_id INTEGER REFERENCES group_profiles ON DELETE SET NULL, -- shared group profile
   inv_queue_info BLOB,
   created_at TEXT CHECK(created_at NOT NULL),
-  updated_at TEXT CHECK(updated_at NOT NULL), -- received
+  updated_at TEXT CHECK(updated_at NOT NULL),
+  chat_item_id INTEGER DEFAULT NULL REFERENCES chat_items ON DELETE SET NULL, -- received
   FOREIGN KEY(user_id, local_display_name)
   REFERENCES display_names(user_id, local_display_name)
   ON DELETE CASCADE