基本功能复刻完成

internal/handler/admin_gift_card_api.go

@@ -0,0 +1,107 @@
+package handler
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"math/rand"
+	"net/http"
+	"strings"
+	"time"
+	"xboard-go/internal/database"
+	"xboard-go/internal/model"
+
+	"github.com/gin-gonic/gin"
+)
+
+// AdminGiftCardFetch handles fetching of gift card templates and batch info.
+func AdminGiftCardFetch(c *gin.Context) {
+	id := c.Query("id")
+	if id != "" {
+		var template model.GiftCardTemplate
+		if err := database.DB.Where("id = ?", id).First(&template).Error; err != nil {
+			Fail(c, http.StatusNotFound, "Template not found")
+			return
+		}
+		Success(c, template)
+		return
+	}
+
+	var data []model.GiftCardTemplate
+	database.DB.Order("sort ASC, id DESC").Find(&data)
+	Success(c, data)
+}
+
+// AdminGiftCardSave creates or updates a gift card template.
+func AdminGiftCardSave(c *gin.Context) {
+	var payload model.GiftCardTemplate
+	if err := c.ShouldBindJSON(&payload); err != nil {
+		Fail(c, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if payload.ID > 0 {
+		if err := database.DB.Model(&model.GiftCardTemplate{}).Where("id = ?", payload.ID).Updates(payload).Error; err != nil {
+			Fail(c, http.StatusInternalServerError, "failed to update template")
+			return
+		}
+	} else {
+		payload.Status = true
+		if err := database.DB.Create(&payload).Error; err != nil {
+			Fail(c, http.StatusInternalServerError, "failed to create template")
+			return
+		}
+	}
+
+	Success(c, true)
+}
+
+// AdminGiftCardGenerate batches generation of codes for a template.
+func AdminGiftCardGenerate(c *gin.Context) {
+	var payload struct {
+		TemplateID int    `json:"template_id"`
+		Count      int    `json:"count"`
+		Prefix     string `json:"prefix"`
+		ExpiresAt  int64  `json:"expires_at"`
+	}
+	if err := c.ShouldBindJSON(&payload); err != nil || payload.TemplateID <= 0 || payload.Count <= 0 {
+		Fail(c, http.StatusBadRequest, "template_id and count are required")
+		return
+	}
+
+	batchID := fmt.Sprintf("batch_%d", time.Now().Unix())
+	prefix := payload.Prefix
+	if prefix == "" {
+		prefix = "GC"
+	}
+
+	tx := database.DB.Begin()
+	for i := 0; i < payload.Count; i++ {
+		code := generateGiftCode(prefix)
+		item := model.GiftCardCode{
+			TemplateID: payload.TemplateID,
+			Code:       code,
+			BatchID:    batchID,
+			Status:     0, // Unused
+			MaxUsage:   1,
+			ExpiresAt:  &payload.ExpiresAt,
+		}
+		if payload.ExpiresAt == 0 {
+			item.ExpiresAt = nil
+		}
+		if err := tx.Create(&item).Error; err != nil {
+			tx.Rollback()
+			Fail(c, http.StatusInternalServerError, "failed to generate codes")
+			return
+		}
+	}
+	tx.Commit()
+
+	Success(c, gin.H{"batch_id": batchID})
+}
+
+func generateGiftCode(prefix string) string {
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	hash := md5.Sum([]byte(fmt.Sprintf("%d%d", time.Now().UnixNano(), r.Int63())))
+	return prefix + strings.ToUpper(hex.EncodeToString(hash[:])[:12])
+}