137 lines
3.8 KiB
Go
137 lines
3.8 KiB
Go
package admin_promotion
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import (
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"context"
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"crypto/rand"
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"fmt"
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"math/big"
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"time"
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"hm-server/app/main/api/internal/svc"
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"hm-server/app/main/api/internal/types"
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"hm-server/app/main/model"
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"hm-server/common/ctxdata"
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"hm-server/common/xerr"
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"github.com/pkg/errors"
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"github.com/zeromicro/go-zero/core/logx"
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"github.com/zeromicro/go-zero/core/stores/sqlx"
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)
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type CreatePromotionLinkLogic struct {
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logx.Logger
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ctx context.Context
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svcCtx *svc.ServiceContext
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}
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func NewCreatePromotionLinkLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreatePromotionLinkLogic {
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return &CreatePromotionLinkLogic{
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Logger: logx.WithContext(ctx),
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ctx: ctx,
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svcCtx: svcCtx,
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}
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}
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// 生成6位随机字符串（大小写字母和数字）
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func generateRandomString() (string, error) {
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const (
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chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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length = 6
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)
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result := make([]byte, length)
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for i := 0; i < length; i++ {
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num, err := rand.Int(rand.Reader, big.NewInt(int64(len(chars))))
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if err != nil {
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return "", err
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}
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result[i] = chars[num.Int64()]
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}
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return string(result), nil
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}
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func (l *CreatePromotionLinkLogic) CreatePromotionLink(req *types.CreatePromotionLinkReq) (resp *types.CreatePromotionLinkResp, err error) {
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// 获取当前用户ID
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adminUserId, getUidErr := ctxdata.GetUidFromCtx(l.ctx)
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if getUidErr != nil {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "创建推广链接, 获取用户信息失败, %+v", getUidErr)
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}
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// 生成唯一URL
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var url string
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maxRetries := 5 // 最大重试次数
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for i := 0; i < maxRetries; i++ {
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// 生成6位随机字符串
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randomStr, err := generateRandomString()
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if err != nil {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "创建推广链接, 生成随机字符串失败, %+v", err)
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}
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// 检查URL是否已存在
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existLink, err := l.svcCtx.AdminPromotionLinkModel.FindOneByUrl(l.ctx, randomStr)
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if err != nil && !errors.Is(err, model.ErrNotFound) {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "创建推广链接, 检查URL是否存在失败, %+v", err)
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}
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if existLink != nil {
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continue // URL已存在，继续尝试
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}
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// URL可用
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url = randomStr
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break
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}
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if url == "" {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "创建推广链接失败, 多次尝试生成唯一URL均失败")
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}
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url = fmt.Sprintf("%s/%s", l.svcCtx.Config.AdminPromotion.URLDomain, url)
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// 创建推广链接
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link := &model.AdminPromotionLink{
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Name: req.Name,
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Url: url,
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AdminUserId: adminUserId,
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}
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var linkId int64
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err = l.svcCtx.AdminPromotionLinkModel.Trans(l.ctx, func(ctx context.Context, session sqlx.Session) error {
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result, err := l.svcCtx.AdminPromotionLinkModel.Insert(l.ctx, session, link)
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if err != nil {
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return fmt.Errorf("创建推广链接失败, %+v", err)
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}
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linkId, err = result.LastInsertId()
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if err != nil {
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return fmt.Errorf("获取推广链接ID失败, %+v", err)
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}
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// 创建总统计记录
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totalStats := &model.AdminPromotionLinkStatsTotal{
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LinkId: linkId,
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}
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_, err = l.svcCtx.AdminPromotionLinkStatsTotalModel.Insert(l.ctx, session, totalStats)
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if err != nil {
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return fmt.Errorf("创建推广链接总统计记录失败, %+v", err)
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}
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// 创建统计历史记录
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historyStats := &model.AdminPromotionLinkStatsHistory{
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LinkId: linkId,
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StatsDate: time.Now().Truncate(24 * time.Hour),
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}
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_, err = l.svcCtx.AdminPromotionLinkStatsHistoryModel.Insert(l.ctx, session, historyStats)
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if err != nil {
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return fmt.Errorf("创建推广链接统计历史记录失败, %+v", err)
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}
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return nil
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})
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if err != nil {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "创建推广链接失败, %+v", err)
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}
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return &types.CreatePromotionLinkResp{
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Id: linkId,
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Url: url,
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}, nil
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}
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