add getUserById helper in http delete old connections code from http

database.go

@@ -42,8 +42,8 @@ func DbInit(ctx context.Context) {
 			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
 			requestor_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 			recipient_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-		    state TINYINT NOT NULL DEFAULT 0
-			created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+		    state SMALLINT NOT NULL DEFAULT 0,
+			created_at TIMESTAMP NOT NULL DEFAULT NOW()
 		)
 	`)
 	if err != nil {
@@ -173,10 +173,10 @@ func DbConnectionSave(ctx context.Context, conn *Connection) error {
 	`, conn.RequestorId, conn.RecipientId, conn.State, conn.CreatedAt).Scan(&conn.Id)
 }
 
-func DbConnectionGetBelongingToUser(ctx context.Context, user *User) error {
+func DbConnectionsGetBelongingToUser(ctx context.Context, user *User) error {
 	rows, err := dbConn.Query(ctx, `
 		SELECT id, requestor_id, recipient_id, state, created_at
-		FROM connections
+		FROM user_connections
 		WHERE requestor_id = $1 OR recipient_id = $1
 	`, user.Id)
 	if err != nil {
@@ -195,10 +195,16 @@ func DbConnectionGetBelongingToUser(ctx context.Context, user *User) error {
 		}
 		user.Connections[conn.Id] = conn
 	}
-
 	return rows.Err()
 }
 
+func DbConnectionSet(ctx context.Context, conn *Connection) error {
+	_, err := dbConn.Exec(ctx, `
+		UPDATE user_connections SET state = $1 WHERE id = $2
+	`, conn.State, conn.Id)
+	return err
+}
+
 func DbGroupSave(ctx context.Context, group *Group) error {
 	err := dbConn.QueryRow(ctx, `
 		INSERT INTO chat_groups (name, creator_id, owner_id, enable_client_colors, color_red, color_green, color_blue, created_at)