feat: 添加种子数据初始化功能，重构多个处理程序以简化错误响应和用户验证

pkg/database/seed.go

@@ -0,0 +1,156 @@
+package database
+
+import (
+	"carrotskin/internal/model"
+
+	"go.uber.org/zap"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+)
+
+// 默认管理员配置
+const (
+	defaultAdminUsername = "admin"
+	defaultAdminEmail    = "admin@example.com"
+	defaultAdminPassword = "admin123456" // 首次登录后请立即修改
+)
+
+// defaultSystemConfigs 默认系统配置
+var defaultSystemConfigs = []model.SystemConfig{
+	{Key: "site_name", Value: "CarrotSkin", Description: "网站名称", Type: model.ConfigTypeString, IsPublic: true},
+	{Key: "site_description", Value: "一个优秀的Minecraft皮肤站", Description: "网站描述", Type: model.ConfigTypeString, IsPublic: true},
+	{Key: "registration_enabled", Value: "true", Description: "是否允许用户注册", Type: model.ConfigTypeBoolean, IsPublic: true},
+	{Key: "checkin_reward", Value: "10", Description: "签到奖励积分", Type: model.ConfigTypeInteger, IsPublic: true},
+	{Key: "texture_download_reward", Value: "1", Description: "材质被下载奖励积分", Type: model.ConfigTypeInteger, IsPublic: false},
+	{Key: "max_textures_per_user", Value: "50", Description: "每个用户最大材质数量", Type: model.ConfigTypeInteger, IsPublic: false},
+	{Key: "max_profiles_per_user", Value: "5", Description: "每个用户最大角色数量", Type: model.ConfigTypeInteger, IsPublic: false},
+	{Key: "default_avatar", Value: "", Description: "默认头像URL", Type: model.ConfigTypeString, IsPublic: true},
+}
+
+// defaultCasbinRules 默认Casbin权限规则
+var defaultCasbinRules = []model.CasbinRule{
+	// 管理员拥有所有权限
+	{PType: "p", V0: "admin", V1: "*", V2: "*"},
+	// 普通用户权限
+	{PType: "p", V0: "user", V1: "texture", V2: "create"},
+	{PType: "p", V0: "user", V1: "texture", V2: "read"},
+	{PType: "p", V0: "user", V1: "texture", V2: "update_own"},
+	{PType: "p", V0: "user", V1: "texture", V2: "delete_own"},
+	{PType: "p", V0: "user", V1: "profile", V2: "create"},
+	{PType: "p", V0: "user", V1: "profile", V2: "read"},
+	{PType: "p", V0: "user", V1: "profile", V2: "update_own"},
+	{PType: "p", V0: "user", V1: "profile", V2: "delete_own"},
+	{PType: "p", V0: "user", V1: "user", V2: "update_own"},
+	// 角色继承：admin 继承 user 的所有权限
+	{PType: "g", V0: "admin", V1: "user"},
+}
+
+// Seed 初始化种子数据
+func Seed(logger *zap.Logger) error {
+	db, err := GetDB()
+	if err != nil {
+		return err
+	}
+
+	logger.Info("开始初始化种子数据...")
+
+	// 初始化默认管理员用户
+	if err := seedAdminUser(db, logger); err != nil {
+		return err
+	}
+
+	// 初始化系统配置
+	if err := seedSystemConfigs(db, logger); err != nil {
+		return err
+	}
+
+	// 初始化Casbin权限规则
+	if err := seedCasbinRules(db, logger); err != nil {
+		return err
+	}
+
+	logger.Info("种子数据初始化完成")
+	return nil
+}
+
+// seedAdminUser 初始化默认管理员用户
+func seedAdminUser(db *gorm.DB, logger *zap.Logger) error {
+	// 检查是否已存在管理员用户
+	var count int64
+	if err := db.Model(&model.User{}).Where("role = ?", "admin").Count(&count).Error; err != nil {
+		logger.Error("检查管理员用户失败", zap.Error(err))
+		return err
+	}
+
+	// 如果已存在管理员，跳过创建
+	if count > 0 {
+		logger.Info("管理员用户已存在，跳过创建")
+		return nil
+	}
+
+	// 加密密码
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(defaultAdminPassword), bcrypt.DefaultCost)
+	if err != nil {
+		logger.Error("密码加密失败", zap.Error(err))
+		return err
+	}
+
+	// 创建默认管理员
+	admin := &model.User{
+		Username: defaultAdminUsername,
+		Email:    defaultAdminEmail,
+		Password: string(hashedPassword),
+		Role:     "admin",
+		Status:   1,
+		Points:   0,
+	}
+
+	if err := db.Create(admin).Error; err != nil {
+		logger.Error("创建管理员用户失败", zap.Error(err))
+		return err
+	}
+
+	logger.Info("默认管理员用户创建成功",
+		zap.String("username", defaultAdminUsername),
+		zap.String("email", defaultAdminEmail),
+	)
+	logger.Warn("请立即登录并修改默认管理员密码！默认密码请查看源码中的 defaultAdminPassword 常量")
+
+	return nil
+}
+
+// seedSystemConfigs 初始化系统配置
+func seedSystemConfigs(db *gorm.DB, logger *zap.Logger) error {
+	for _, config := range defaultSystemConfigs {
+		// 使用 FirstOrCreate 避免重复插入
+		var existing model.SystemConfig
+		result := db.Where("key = ?", config.Key).First(&existing)
+		if result.Error == gorm.ErrRecordNotFound {
+			if err := db.Create(&config).Error; err != nil {
+				logger.Error("创建系统配置失败", zap.String("key", config.Key), zap.Error(err))
+				return err
+			}
+			logger.Info("创建系统配置", zap.String("key", config.Key))
+		}
+	}
+	return nil
+}
+
+// seedCasbinRules 初始化Casbin权限规则
+func seedCasbinRules(db *gorm.DB, logger *zap.Logger) error {
+	for _, rule := range defaultCasbinRules {
+		// 检查规则是否已存在
+		var existing model.CasbinRule
+		query := db.Where("ptype = ? AND v0 = ? AND v1 = ? AND v2 = ?", rule.PType, rule.V0, rule.V1, rule.V2)
+		result := query.First(&existing)
+		if result.Error == gorm.ErrRecordNotFound {
+			if err := db.Create(&rule).Error; err != nil {
+				logger.Error("创建Casbin规则失败", zap.String("ptype", rule.PType), zap.Error(err))
+				return err
+			}
+			logger.Info("创建Casbin规则", zap.String("ptype", rule.PType), zap.String("v0", rule.V0), zap.String("v1", rule.V1))
+		}
+	}
+	return nil
+}
+