task_track/backend/internal/handler/task/delete_task_attachment.go

package task

import (
	"net/http"
	"os"
	"strconv"

	"task-track-backend/model"
	"task-track-backend/pkg/database"

	"github.com/gin-gonic/gin"
)

func (h *TaskHandler) DeleteTaskAttachment(c *gin.Context) {
	// 获取任务ID
	taskIDStr := c.Param("id")
	taskID, err := strconv.ParseUint(taskIDStr, 10, 32)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的任务ID"})
		return
	}

	// 获取附件ID
	attachmentIDStr := c.Param("attachment_id")
	attachmentID, err := strconv.ParseUint(attachmentIDStr, 10, 32)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的附件ID"})
		return
	}

	db := database.GetDB()

	// 检查任务是否存在
	var existingTask model.Task
	if err := db.First(&existingTask, uint(taskID)).Error; err != nil {
		if err.Error() == "record not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "任务不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "查询任务失败"})
		return
	}

	// 检查附件是否存在且属于该任务
	var existingAttachment model.TaskAttachment
	if err := db.Where("id = ? AND task_id = ?", uint(attachmentID), uint(taskID)).
		First(&existingAttachment).Error; err != nil {
		if err.Error() == "record not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "附件不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "查询附件失败"})
		return
	}

	// 删除物理文件
	if err := os.Remove(existingAttachment.FilePath); err != nil {
		// 即使文件删除失败，也继续删除数据库记录
		// 记录日志但不返回错误
	}

	// 删除数据库记录
	if err := db.Delete(&existingAttachment).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除附件失败"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "附件删除成功"})
}