backend/internal/handler/captcha_handler.go

package handler

import (
	"carrotskin/internal/container"
	"net/http"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

// CaptchaHandler 验证码处理器
type CaptchaHandler struct {
	container *container.Container
	logger    *zap.Logger
}

// NewCaptchaHandler 创建CaptchaHandler实例
func NewCaptchaHandler(c *container.Container) *CaptchaHandler {
	return &CaptchaHandler{
		container: c,
		logger:    c.Logger,
	}
}

// CaptchaVerifyRequest 验证码验证请求
type CaptchaVerifyRequest struct {
	CaptchaID string `json:"captchaId" binding:"required"`
	Dx        int    `json:"dx" binding:"required"`
}

// Generate 生成验证码
// @Summary 生成滑动验证码
// @Description 生成滑动验证码图片
// @Tags captcha
// @Accept json
// @Produce json
// @Success 200 {object} map[string]interface{} "生成成功 {code: 200, data: {masterImage, tileImage, captchaId, y}}"
// @Failure 500 {object} map[string]interface{} "生成失败"
// @Router /api/v1/captcha/generate [get]
func (h *CaptchaHandler) Generate(c *gin.Context) {
	masterImg, tileImg, captchaID, y, err := h.container.CaptchaService.Generate(c.Request.Context())
	if err != nil {
		h.logger.Error("生成验证码失败", zap.Error(err))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "生成验证码失败",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 200,
		"data": gin.H{
			"masterImage": masterImg,
			"tileImage":   tileImg,
			"captchaId":   captchaID,
			"y":           y,
		},
	})
}

// Verify 验证验证码
// @Summary 验证滑动验证码
// @Description 验证用户滑动的偏移量是否正确
// @Tags captcha
// @Accept json
// @Produce json
// @Param request body CaptchaVerifyRequest true "验证请求"
// @Success 200 {object} map[string]interface{} "验证结果 {code: 200/400, msg: string}"
// @Failure 400 {object} map[string]interface{} "参数错误"
// @Router /api/v1/captcha/verify [post]
func (h *CaptchaHandler) Verify(c *gin.Context) {
	var req CaptchaVerifyRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误: " + err.Error(),
		})
		return
	}

	valid, err := h.container.CaptchaService.Verify(c.Request.Context(), req.Dx, req.CaptchaID)
	if err != nil {
		h.logger.Error("验证码验证失败",
			zap.String("captcha_id", req.CaptchaID),
			zap.Error(err),
		)
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "验证失败",
		})
		return
	}

	if valid {
		c.JSON(http.StatusOK, gin.H{
			"code": 200,
			"msg":  "验证成功",
		})
	} else {
		c.JSON(http.StatusOK, gin.H{
			"code": 400,
			"msg":  "验证失败，请重试",
		})
	}
}