搭建Go后端框架：数据模型、JWT鉴权、租户隔离、WebSocket、REST API路由

server/internal/handler/customer.go

@@ -0,0 +1,111 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"kefu-sys/server/internal/middleware"
+	"kefu-sys/server/internal/model"
+)
+
+type CustomerHandler struct{}
+
+func NewCustomerHandler() *CustomerHandler { return &CustomerHandler{} }
+
+func (h *CustomerHandler) List(c *gin.Context) {
+	tenantID := middleware.GetTenantID(c)
+	page, pageSize := middleware.GetPageParams(c)
+	search := c.Query("search")
+	status := c.Query("status")
+	source := c.Query("source")
+
+	var customers []model.Customer
+	var total int64
+
+	query := model.DB.Where("tenant_id = ?", tenantID)
+	if search != "" {
+		query = query.Where("name LIKE ? OR phone LIKE ? OR email LIKE ?", "%"+search+"%", "%"+search+"%", "%"+search+"%")
+	}
+	if status != "" {
+		query = query.Where("status = ?", status)
+	}
+	if source != "" {
+		query = query.Where("source = ?", source)
+	}
+
+	query.Model(&model.Customer{}).Count(&total)
+	query.Order("updated_at desc").Offset((page - 1) * pageSize).Limit(pageSize).Find(&customers)
+
+	middleware.JSONList(c, customers, total, page, pageSize)
+}
+
+func (h *CustomerHandler) Get(c *gin.Context) {
+	tenantID := middleware.GetTenantID(c)
+	id := c.Param("id")
+
+	var customer model.Customer
+	if err := model.DB.Where("id = ? AND tenant_id = ?", id, tenantID).First(&customer).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"code": 404, "message": "客户不存在"})
+		return
+	}
+
+	var sessions []model.Session
+	model.DB.Where("customer_id = ? AND tenant_id = ?", customer.ID, tenantID).
+		Order("created_at desc").Limit(20).Find(&sessions)
+
+	middleware.JSON(c, gin.H{"customer": customer, "sessions": sessions})
+}
+
+func (h *CustomerHandler) Create(c *gin.Context) {
+	var customer model.Customer
+	if err := c.ShouldBindJSON(&customer); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+
+	customer.TenantID = middleware.GetTenantID(c)
+
+	if err := model.DB.Create(&customer).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": "创建失败"})
+		return
+	}
+
+	middleware.JSON(c, customer)
+}
+
+func (h *CustomerHandler) Update(c *gin.Context) {
+	tenantID := middleware.GetTenantID(c)
+	id := c.Param("id")
+
+	var customer model.Customer
+	if err := model.DB.Where("id = ? AND tenant_id = ?", id, tenantID).First(&customer).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"code": 404, "message": "客户不存在"})
+		return
+	}
+
+	var updates map[string]interface{}
+	if err := c.ShouldBindJSON(&updates); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+
+	// 不允许修改 tenant_id
+	delete(updates, "tenant_id")
+	delete(updates, "id")
+
+	model.DB.Model(&customer).Updates(updates)
+	middleware.JSON(c, customer)
+}
+
+func (h *CustomerHandler) Delete(c *gin.Context) {
+	tenantID := middleware.GetTenantID(c)
+	id := c.Param("id")
+
+	result := model.DB.Where("id = ? AND tenant_id = ?", id, tenantID).Delete(&model.Customer{})
+	if result.RowsAffected == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"code": 404, "message": "客户不存在"})
+		return
+	}
+
+	middleware.JSON(c, gin.H{"message": "已删除"})
+}