refactor(backend): split project write responsibilities

backend/internal/logic/files/service.go

@@ -1,16 +1,21 @@
 package files
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"os"
 	"path/filepath"
 	"strings"
 	"time"
+
+	"gorm.io/gorm"
+	"senlinai-agent/backend/internal/models"
 )
 
 type Service struct {
 	root string
+	db   *gorm.DB
 }
 
 type StoredFile struct {
@@ -19,10 +24,16 @@ type StoredFile struct {
 	AbsolutePath string
 }
 
-func NewService(root string) *Service {
-	return &Service{root: root}
+// NewService 集中持有存储根目录；任何服务端本地路径都只能由该服务构造。
+func NewService(root string, databases ...*gorm.DB) *Service {
+	var database *gorm.DB
+	if len(databases) > 0 {
+		database = databases[0]
+	}
+	return &Service{root: root, db: database}
 }
 
+// Save 清理客户端文件名，并只返回供持久化的相对路径；绝对路径不得进入 API DTO。
 func (s *Service) Save(projectID uint, originalName string, content io.Reader) (StoredFile, error) {
 	cleanName := filepath.Base(strings.ReplaceAll(strings.TrimSpace(originalName), "\\", "/"))
 	if cleanName == "." || cleanName == "" {
@@ -43,3 +54,38 @@ func (s *Service) Save(projectID uint, originalName string, content io.Reader) (
 	}
 	return StoredFile{OriginalName: cleanName, RelativePath: relative, AbsolutePath: absolute}, nil
 }
+
+func (s *Service) database() *gorm.DB {
+	if s.db != nil {
+		return s.db
+	}
+	return models.DBService
+}
+
+var (
+	ErrSourceTitleRequired = errors.New("source title is required")
+	ErrSourcePathRequired  = errors.New("source file path is required")
+)
+
+// CreateSource 只持久化 Save 产生的相对路径，不接受 handler 自行拼接本地路径。
+func (s *Service) CreateSource(ownerID uint, project *models.SenlinAgentProject, title string, stored StoredFile) (*models.SenlinAgentSource, error) {
+	title = strings.TrimSpace(title)
+	if title == "" {
+		title = stored.OriginalName
+	}
+	if title == "" {
+		return nil, ErrSourceTitleRequired
+	}
+	relativePath := filepath.ToSlash(strings.TrimSpace(stored.RelativePath))
+	if relativePath == "" || filepath.IsAbs(relativePath) {
+		return nil, ErrSourcePathRequired
+	}
+	source := &models.SenlinAgentSource{
+		ProjectID: project.ID, ProjectIdentity: project.Identity, CreatedBy: ownerID,
+		Kind: "file", Title: title, FilePath: relativePath,
+	}
+	if err := s.database().Create(source).Error; err != nil {
+		return nil, err
+	}
+	return source, nil
+}