feat: Inital commit

internal/config/config.go

@@ -0,0 +1,42 @@
+package config
+
+import (
+	"log"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	GCPProjectID string `mapstructure:"gcp_project_id"`
+	Telegram     struct {
+		Token   string  `mapstructure:"token"`
+		ChatIDs []int64 `mapstructure:"chat_ids"`
+	} `mapstructure:"telegram"`
+}
+
+func Load() (Config, error) {
+	viper.SetConfigName("config")
+	viper.SetConfigType("yaml")
+	viper.AddConfigPath(".")
+
+	viper.SetEnvPrefix("CRAWLER")
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	viper.AutomaticEnv()
+
+	var cfg Config
+	if err := viper.ReadInConfig(); err != nil {
+		// If the error is that the file wasn't found, that's okay. Log it and continue.
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			log.Println("ℹ️ No 'config.yaml' file found. Relying on environment variables or flags.")
+		} else {
+			// For any other error (e.g., malformed YAML), return the error.
+			return cfg, err
+		}
+	}
+
+	if err := viper.Unmarshal(&cfg); err != nil {
+		return cfg, err
+	}
+	return cfg, nil
+}