Implement save method in playerservice to update existing player entities

backend/playerService.go

@@ -39,6 +39,36 @@ func (ps *PlayerService) Query(query PlayerServiceQuery) ([]Player, error) {
 	return res, nil
 }
 
+func (ps *PlayerService) Save(player Player) (Player, error) {
+	log.Printf("Saving player %s", player.Name)
+	res, err := ps.db.writeConn.Exec("insert into player (name, guild) values (?, ?) on conflict (name) do update set guild = ?", player.Name, player.Guild.ID, player.Guild.ID)
+	if err != nil {
+		return player, fmt.Errorf("failed to update player: %v", err)
+	}
+
+	id := player.ID
+	if id == 0 {
+		id, err = res.LastInsertId()
+		if err != nil {
+			return player, fmt.Errorf("failed to get last insert id: %v", err)
+		}
+	}
+	log.Printf("Updated player %s with id %d", player.Name, id)
+
+	qres, err := ps.Query(PlayerServiceQuery{ID: &id})
+	if err != nil {
+		return player, fmt.Errorf("failed getting player for id %d: %v", id, err)
+	}
+	if len(qres) > 1 {
+		return player, fmt.Errorf("more than one player found for id %d", id)
+	}
+	if len(qres) == 0 {
+		return player, fmt.Errorf("no player found for id %d", id)
+	}
+
+	return qres[0], nil
+}
+
 func (ps *PlayerService) Create(name string, guild Guild) (Player, error) {
 	log.Printf("Creating player %s in guild %s", name, guild.Name)
 	player := Player{}