implemented delete tag functionality

controllers/DeleteTagController.go

@@ -0,0 +1,25 @@
+package controllers
+
+import (
+	"ch/kirari04/videocms/helpers"
+	"ch/kirari04/videocms/logic"
+	"ch/kirari04/videocms/models"
+
+	"github.com/labstack/echo/v4"
+)
+
+func DeleteTagController(c echo.Context) error {
+	// parse & validate request
+	var validator models.TagDeleteValidation
+	if status, err := helpers.Validate(c, &validator); err != nil {
+		return c.String(status, err.Error())
+	}
+
+	status, err := logic.DeleteTag(validator.TagID, validator.FileID, c.Get("UserID").(uint))
+
+	if err != nil {
+		return c.String(status, err.Error())
+	}
+
+	return c.NoContent(status)
+}

logic/DeleteTag.go

@@ -0,0 +1,39 @@
+package logic
+
+import (
+	"ch/kirari04/videocms/inits"
+	"ch/kirari04/videocms/models"
+	"errors"
+	"log"
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+func DeleteTag(tagId uint, fromLinkId uint, userId uint) (status int, err error) {
+	//check if requested folder exists (if set)
+	var link models.Link
+	if err := inits.DB.First(&link, fromLinkId).Error; err != nil {
+		return http.StatusBadRequest, errors.New("link doesn't exist")
+	}
+	if link.UserID != userId {
+		return http.StatusBadRequest, errors.New("link doesn't exist")
+	}
+
+	// check if tag exists
+	var tag models.Tag
+	if err := inits.DB.First(&tag, tagId).Error; err != nil {
+		return http.StatusBadRequest, errors.New("tag doesn't exist")
+	}
+
+	if tag.UserId != userId {
+		return http.StatusBadRequest, errors.New("tag doesn't exist")
+	}
+
+	if err := inits.DB.Model(&link).Association("Tags").Delete(&tag); err != nil {
+		log.Printf("Error removing tag: %v", err)
+		return http.StatusInternalServerError, echo.ErrInternalServerError
+	}
+
+	return http.StatusOK, nil
+}

models/Tag.go

@@ -25,3 +25,8 @@ type TagCreateValidation struct {
 	Name   string `validate:"required,min=1,max=120" json:"Name" form:"Name"`
 	FileID uint   `validate:"required,number" json:"FileID" form:"FileID"`
 }
+
+type TagDeleteValidation struct {
+	TagID  uint `validate:"required,number" json:"TagID" form:"TagID"`
+	FileID uint `validate:"required,number" json:"FileID" form:"FileID"`
+}

routes/api.go

@@ -53,6 +53,7 @@ func Api() {
 	protectedApi.GET("/files", controllers.ListFiles)
 	protectedApi.DELETE("/files", controllers.DeleteFilesController)
 	protectedApi.POST("/file/tag", controllers.CreateTagController)
+	protectedApi.DELETE("/file/tag", controllers.DeleteTagController)
 
 	protectedApi.GET("/account", controllers.GetAccount)
 	protectedApi.GET("/account/settings", controllers.GetUserSettingsController)