feat(config): 本地config文件缺失时使用默认配置

backend/internal/config/loadconfig.go

@@ -1,8 +1,9 @@
 package config
 
 import (
-	"io/ioutil"
-
+	"fmt"
+	"os"
+	"errors"
 	"gopkg.in/yaml.v3"
 )
 
@@ -40,15 +41,54 @@ type RabbitMQConfig struct {
 }
 
 func Load(filename string) (Config, error) {
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
-		return Config{}, err
+		return Config{}, fmt.Errorf("failed to read config file: %w", err)
 	}
 
 	var cfg Config
 	if err := yaml.Unmarshal(data, &cfg); err != nil {
-		return Config{}, err
+		return Config{}, fmt.Errorf("parse config %s: %w", filename, err)
 	}
 
 	return cfg, nil
 }
+
+// bool用来表示是否使用了默认配置，true表示使用了默认配置
+func LoadLocalDev(filename string) (Config, bool, error) {
+	cfg, err := Load(filename)
+	if err == nil {
+		return cfg, false, nil
+	}
+	if errors.Is(err, os.ErrNotExist) {
+		return DefaultLocalConfig(), true, nil
+	}
+	return Config{}, false, err
+}
+
+func DefaultLocalConfig() Config {
+	return Config{
+		Server: ServerConfig{
+			Port: 8080,
+		},
+		Database: DatabaseConfig{
+			Host:     "localhost",
+			Port:     3306,
+			User:	 "root",
+			Password: "123456",
+			DBName:   "feedsystem",
+		},
+		Redis: RedisConfig{
+			Host:     "localhost",
+			Port:     6379,
+			Password: "123456",
+			DB:       0,
+		},
+		RabbitMQ: RabbitMQConfig{
+			Host:     "localhost",
+			Port:     5672,
+			Username: "admin",
+			Password: "password123",
+		},
+	}
+}