dev: add ddns create, edit and batch delete api (#444)

cmd/dashboard/controller/controller.go

@@ -1,6 +1,7 @@
 package controller
 
 import (
+	"errors"
 	"fmt"
 	"log"
 	"net/http"
@@ -55,15 +56,20 @@ func routers(r *gin.Engine) {
 	api := r.Group("api/v1")
 	api.POST("/login", authMiddleware.LoginHandler)
 
-	unrequiredAuth := api.Group("", unrquiredAuthMiddleware(authMiddleware))
-	unrequiredAuth.GET("/ws/server", serverStream)
-	unrequiredAuth.GET("/server-group", listServerGroup)
+	optionalAuth := api.Group("", optionalAuthMiddleware(authMiddleware))
+	optionalAuth.GET("/ws/server", commonHandler[any](serverStream))
+	optionalAuth.GET("/server-group", commonHandler[[]model.ServerGroup](listServerGroup))
+	optionalAuth.GET("/ddns", listDDNS) // TODO
 
 	auth := api.Group("", authMiddleware.MiddlewareFunc())
 	auth.GET("/refresh_token", authMiddleware.RefreshHandler)
-	auth.PATCH("/server/:id", editServer)
+	auth.PATCH("/server/:id", commonHandler[any](editServer))
 
-	api.DELETE("/batch-delete/server", batchDeleteServer)
+	auth.POST("/ddns", commonHandler[any](newDDNS))
+	auth.PATCH("/ddns/:id", commonHandler[any](editDDNS))
+
+	api.POST("/batch-delete/server", commonHandler[any](batchDeleteServer))
+	api.POST("/batch-delete/ddns", commonHandler[any](batchDeleteDDNS))
 
 	// 通用页面
 	// cp := commonPage{r: r}
@@ -147,3 +153,45 @@ func recordPath(c *gin.Context) {
 	}
 	c.Set("MatchedPath", url)
 }
+
+func newErrorResponse[T any](err error) model.CommonResponse[T] {
+	return model.CommonResponse[T]{
+		Success: false,
+		Error:   err.Error(),
+	}
+}
+
+type handlerFunc func(c *gin.Context) error
+
+// There are many error types in gorm, so create a custom type to represent all
+// gorm errors here instead
+type gormError struct {
+	msg string
+	a   []interface{}
+}
+
+func newGormError(format string, args ...interface{}) error {
+	return &gormError{
+		msg: format,
+		a:   args,
+	}
+}
+
+func (ge *gormError) Error() string {
+	return fmt.Sprintf(ge.msg, ge.a...)
+}
+
+func commonHandler[T any](handler handlerFunc) func(*gin.Context) {
+	return func(c *gin.Context) {
+		if err := handler(c); err != nil {
+			if _, ok := err.(*gormError); ok {
+				log.Printf("NEZHA>> gorm error: %v", err)
+				c.JSON(http.StatusOK, newErrorResponse[T](errors.New("database error")))
+				return
+			} else {
+				c.JSON(http.StatusOK, newErrorResponse[T](err))
+				return
+			}
+		}
+	}
+}