first commit

config/config.go

@@ -0,0 +1,124 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Server   ServerConfig   `yaml:"server"`
+	Database DatabaseConfig `yaml:"database"`
+	World    WorldConfig    `yaml:"world"`
+	Network  NetworkConfig  `yaml:"network"`
+	Log      LogConfig      `yaml:"log"`
+}
+
+type DatabaseConfig struct {
+	Host         string        `yaml:"host"`
+	Port         int           `yaml:"port"`
+	User         string        `yaml:"user"`
+	Password     string        `yaml:"password"`
+	DBName       string        `yaml:"dbname"`
+	MaxConns     int32         `yaml:"max_conns"`
+	MinConns     int32         `yaml:"min_conns"`
+	SaveInterval time.Duration `yaml:"save_interval"`
+}
+
+func (d *DatabaseConfig) DSN() string {
+	return fmt.Sprintf("postgres://%s:%s@%s:%d/%s?sslmode=disable",
+		d.User, d.Password, d.Host, d.Port, d.DBName)
+}
+
+type ServerConfig struct {
+	Host string `yaml:"host"`
+	Port int    `yaml:"port"`
+}
+
+type WorldConfig struct {
+	TickRate   int       `yaml:"tick_rate"`
+	AOI        AOIConfig `yaml:"aoi"`
+	MaxPlayers int       `yaml:"max_players"`
+}
+
+type AOIConfig struct {
+	Enabled   bool    `yaml:"enabled"`
+	CellSize  float32 `yaml:"cell_size"`
+	ViewRange int     `yaml:"view_range"`
+}
+
+type NetworkConfig struct {
+	WriteBufferSize  int           `yaml:"write_buffer_size"`
+	ReadBufferSize   int           `yaml:"read_buffer_size"`
+	SendChannelSize  int           `yaml:"send_channel_size"`
+	HeartbeatInterval time.Duration `yaml:"heartbeat_interval"`
+	HeartbeatTimeout  time.Duration `yaml:"heartbeat_timeout"`
+	MaxMessageSize   int64         `yaml:"max_message_size"`
+}
+
+type LogConfig struct {
+	Level string `yaml:"level"`
+}
+
+func (c *Config) TickInterval() time.Duration {
+	return time.Second / time.Duration(c.World.TickRate)
+}
+
+func (c *ServerConfig) Address() string {
+	return fmt.Sprintf("%s:%d", c.Host, c.Port)
+}
+
+func Load(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read config file: %w", err)
+	}
+
+	cfg := defaultConfig()
+	if err := yaml.Unmarshal(data, cfg); err != nil {
+		return nil, fmt.Errorf("parse config file: %w", err)
+	}
+
+	return cfg, nil
+}
+
+func defaultConfig() *Config {
+	return &Config{
+		Server: ServerConfig{
+			Host: "0.0.0.0",
+			Port: 8080,
+		},
+		World: WorldConfig{
+			TickRate:   20,
+			MaxPlayers: 5000,
+			AOI: AOIConfig{
+				Enabled:   true,
+				CellSize:  50.0,
+				ViewRange: 2,
+			},
+		},
+		Database: DatabaseConfig{
+			Host:         "localhost",
+			Port:         5432,
+			User:         "postgres",
+			Password:     "postgres",
+			DBName:       "mmorpg",
+			MaxConns:     50,
+			MinConns:     5,
+			SaveInterval: 60 * time.Second,
+		},
+		Network: NetworkConfig{
+			WriteBufferSize:   4096,
+			ReadBufferSize:    4096,
+			SendChannelSize:   256,
+			HeartbeatInterval: 5 * time.Second,
+			HeartbeatTimeout:  15 * time.Second,
+			MaxMessageSize:    8192,
+		},
+		Log: LogConfig{
+			Level: "info",
+		},
+	}
+}