增加 自定义导航栏模块

services/portal_navigation.go

@@ -0,0 +1,80 @@
+package services
+
+import (
+	"NetworkAuth/models"
+	"strings"
+
+	"gorm.io/gorm"
+)
+
+const portalNavigationAdminPath = "admin"
+const portalNavigationAdminSort = 999
+
+// NormalizePortalNavigation 规范化门户导航数据
+// 统一清理首尾空白，并处理首页与排序约束
+func NormalizePortalNavigation(item *models.PortalNavigation) {
+	item.Name = strings.TrimSpace(item.Name)
+	item.Path = strings.TrimSpace(item.Path)
+	if item.Sort < 0 {
+		item.Sort = 0
+	}
+	if item.IsHome {
+		item.IsHidden = false
+	}
+}
+
+// IsPortalNavigationAdminEntry 判断是否为管理员入口
+// 管理员入口属于系统保留导航项，不允许修改基础信息
+func IsPortalNavigationAdminEntry(item models.PortalNavigation) bool {
+	return strings.EqualFold(strings.TrimSpace(item.Path), portalNavigationAdminPath)
+}
+
+// LockPortalNavigationProtectedFields 锁定系统保留导航字段
+// 管理员入口仅允许调整隐藏状态，其余字段保持系统固定值
+func LockPortalNavigationProtectedFields(item *models.PortalNavigation, exists models.PortalNavigation) {
+	switch IsPortalNavigationAdminEntry(exists) {
+	case true:
+		item.Name = "管理员登录"
+		item.Path = portalNavigationAdminPath
+		item.Sort = portalNavigationAdminSort
+		item.IsHome = false
+		item.IsExternal = false
+	default:
+		return
+	}
+}
+
+// SavePortalNavigation 保存门户导航
+// 当当前记录被设置为门户首页时，会自动取消其他记录的首页状态
+func SavePortalNavigation(db *gorm.DB, item *models.PortalNavigation, exists ...models.PortalNavigation) error {
+	if len(exists) > 0 {
+		LockPortalNavigationProtectedFields(item, exists[0])
+	}
+	NormalizePortalNavigation(item)
+
+	return db.Transaction(func(tx *gorm.DB) error {
+		if item.IsHome {
+			query := tx.Model(&models.PortalNavigation{}).Where("is_home = ?", true)
+			if item.ID > 0 {
+				query = query.Where("id <> ?", item.ID)
+			}
+			if err := query.Update("is_home", false).Error; err != nil {
+				return err
+			}
+		}
+
+		switch {
+		case item.ID == 0:
+			return tx.Create(item).Error
+		default:
+			return tx.Model(&models.PortalNavigation{}).Where("id = ?", item.ID).Updates(map[string]interface{}{
+				"name":        item.Name,
+				"path":        item.Path,
+				"sort":        item.Sort,
+				"is_home":     item.IsHome,
+				"is_hidden":   item.IsHidden,
+				"is_external": item.IsExternal,
+			}).Error
+		}
+	})
+}