first commit

app/main/api/internal/logic/authorization/downloadauthorizationdocumentlogic.go

@@ -0,0 +1,51 @@
+package authorization
+
+import (
+	"context"
+	"errors"
+
+	"hm-server/app/main/api/internal/svc"
+	"hm-server/app/main/api/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type DownloadAuthorizationDocumentLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+func NewDownloadAuthorizationDocumentLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DownloadAuthorizationDocumentLogic {
+	return &DownloadAuthorizationDocumentLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *DownloadAuthorizationDocumentLogic) DownloadAuthorizationDocument(req *types.DownloadAuthorizationDocumentReq) (resp *types.DownloadAuthorizationDocumentResp, err error) {
+	// 1. 从数据库获取授权书信息
+	authDoc, err := l.svcCtx.AuthorizationDocumentModel.FindOne(l.ctx, req.DocumentId)
+	if err != nil {
+		logx.Errorf("获取授权书失败: documentId=%d, error=%v", req.DocumentId, err)
+		return nil, err
+	}
+
+	// 2. 检查授权书状态
+	if authDoc.Status != "active" {
+		logx.Errorf("授权书状态异常: documentId=%d, status=%s", req.DocumentId, authDoc.Status)
+		return nil, errors.New("授权书不可用")
+	}
+
+	// 3. 构建完整文件URL
+	fullFileURL := l.svcCtx.AuthorizationService.GetFullFileURL(authDoc.FileUrl)
+
+	// 4. 构建响应
+	resp = &types.DownloadAuthorizationDocumentResp{
+		FileName: authDoc.FileName,
+		FileUrl:  fullFileURL,
+	}
+
+	return resp, nil
+}