feat: implement initial GoDump backup service with management web UI and MySQL support

config/config.go

@@ -0,0 +1,99 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type AuthConfig struct {
+	Enabled  bool   `yaml:"enabled"`
+	Username string `yaml:"username"`
+	Password string `yaml:"password"`
+}
+
+type Config struct {
+	Server    ServerConfig     `yaml:"server"`
+	Auth      AuthConfig       `yaml:"auth"`
+	Logging   LoggingConfig    `yaml:"logging"`
+	Instances []InstanceConfig `yaml:"instances"`
+}
+
+type ServerConfig struct {
+	Port int `yaml:"port"`
+}
+
+type LoggingConfig struct {
+	File string `yaml:"file"`
+}
+
+type InstanceConfig struct {
+	Name          string `yaml:"name"`
+	Host          string `yaml:"host"`
+	Port          int    `yaml:"port"`
+	User          string `yaml:"user"`
+	Password      string `yaml:"password"`
+	BackupDir     string `yaml:"backup_dir"`
+	RetentionDays int    `yaml:"retention_days"`
+	Schedule      string `yaml:"schedule"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var cfg Config
+	if err := yaml.Unmarshal(data, &cfg); err != nil {
+		return nil, err
+	}
+
+	return &cfg, nil
+}
+
+func GenerateDefaultConfig(path string) error {
+	defaultCfg := Config{
+		Server: ServerConfig{
+			Port: 8080,
+		},
+		Auth: AuthConfig{
+			Enabled:  false,
+			Username: "admin",
+			Password: "password",
+		},
+		Logging: LoggingConfig{
+			File: "",
+		},
+		Instances: []InstanceConfig{
+			{
+				Name:          "primary",
+				Host:          "127.0.0.1",
+				Port:          3306,
+				User:          "backup",
+				Password:      "secret",
+				BackupDir:     "/backups/primary",
+				RetentionDays: 14,
+				Schedule:      "0 2 * * *",
+			},
+		},
+	}
+
+	data, err := yaml.Marshal(&defaultCfg)
+	if err != nil {
+		return err
+	}
+
+	// Make sure the directory exists
+	dir := os.Args[0]
+	for i := len(path) - 1; i >= 0 && !os.IsPathSeparator(path[i]); i-- {
+		dir = path[:i]
+	}
+	if dir != "" {
+		if err := os.MkdirAll(dir, 0755); err != nil {
+			return err
+		}
+	}
+
+	return os.WriteFile(path, data, 0644)
+}