implement payroll generator v0.9

service/data-hub/business-engine/internal/config/config.go

@@ -0,0 +1,39 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	Port        string
+	LogLevel    string
+	DatabaseURL string `mapstructure:"databaseUrl"`
+	// SurchargeRules []models.SurchargeRule `mapstructure:"surchargeRules"`
+}
+
+func Load() (*Config, error) {
+	viper.AddConfigPath(".")
+	viper.AddConfigPath("/etc/business-engine/")
+	viper.SetConfigName("config")
+	viper.SetConfigType("yaml")
+
+	viper.AutomaticEnv()
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			return nil, fmt.Errorf("failed to read config file: %w", err)
+		}
+	}
+
+	viper.BindEnv("databaseUrl", "DATABASE_URL")
+
+	var cfg Config
+	if err := viper.Unmarshal(&cfg); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal config: %w", err)
+	}
+	return &cfg, nil
+}