feat: Support for Chat Flow & Agent Support for binding a single chat flow (#765)

Co-authored-by: Yu Yang <72337138+tomasyu985@users.noreply.github.com>
Co-authored-by: zengxiaohui <csu.zengxiaohui@gmail.com>
Co-authored-by: lijunwen.gigoo <lijunwen.gigoo@bytedance.com>
Co-authored-by: lvxinyu.1117 <lvxinyu.1117@bytedance.com>
Co-authored-by: liuyunchao.0510 <liuyunchao.0510@bytedance.com>
Co-authored-by: haozhenfei <37089575+haozhenfei@users.noreply.github.com>
Co-authored-by: July <jiangxujin@bytedance.com>
Co-authored-by: tecvan-fe <fanwenjie.fe@bytedance.com>

backend/domain/upload/internal/dal/dao/files.go

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dao
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+
+	"github.com/coze-dev/coze-studio/backend/domain/upload/entity"
+	"github.com/coze-dev/coze-studio/backend/domain/upload/internal/dal/model"
+	"github.com/coze-dev/coze-studio/backend/domain/upload/internal/dal/query"
+	"github.com/coze-dev/coze-studio/backend/pkg/lang/slices"
+)
+
+type FilesDAO struct {
+	DB    *gorm.DB
+	Query *query.Query
+}
+
+func NewFilesDAO(db *gorm.DB) *FilesDAO {
+	return &FilesDAO{
+		DB:    db,
+		Query: query.Use(db),
+	}
+}
+
+func (dao *FilesDAO) Create(ctx context.Context, file *entity.File) error {
+	f := dao.fromEntityToModel(file)
+	return dao.Query.Files.WithContext(ctx).Create(f)
+}
+
+func (dao *FilesDAO) BatchCreate(ctx context.Context, files []*entity.File) error {
+	if len(files) == 0 {
+		return nil
+	}
+	return dao.Query.Files.WithContext(ctx).CreateInBatches(slices.Transform(files, dao.fromEntityToModel), len(files))
+}
+
+func (dao *FilesDAO) Delete(ctx context.Context, id int64) error {
+	_, err := dao.Query.Files.WithContext(ctx).Where(dao.Query.Files.ID.Eq(id)).Delete()
+	return err
+}
+
+func (dao *FilesDAO) GetByID(ctx context.Context, id int64) (*entity.File, error) {
+	file, err := dao.Query.Files.WithContext(ctx).Where(dao.Query.Files.ID.Eq(id)).First()
+	if err != nil {
+		return nil, err
+	}
+	return dao.fromModelToEntity(file), nil
+}
+
+func (dao *FilesDAO) MGetByIDs(ctx context.Context, ids []int64) ([]*entity.File, error) {
+	if len(ids) == 0 {
+		return nil, nil
+	}
+	files, err := dao.Query.Files.WithContext(ctx).Where(dao.Query.Files.ID.In(ids...)).Find()
+	if err != nil {
+		return nil, err
+	}
+	return slices.Transform(files, dao.fromModelToEntity), nil
+}
+
+func (dao *FilesDAO) fromModelToEntity(model *model.Files) *entity.File {
+	if model == nil {
+		return nil
+	}
+	return &entity.File{
+		ID:            model.ID,
+		Name:          model.Name,
+		FileSize:      model.FileSize,
+		TosURI:        model.TosURI,
+		Status:        entity.FileStatus(model.Status),
+		Comment:       model.Comment,
+		Source:        entity.FileSource(model.Source),
+		CreatorID:     model.CreatorID,
+		CozeAccountID: model.CozeAccountID,
+		ContentType:   model.ContentType,
+		CreatedAt:     model.CreatedAt,
+		UpdatedAt:     model.UpdatedAt,
+	}
+}
+
+func (dao *FilesDAO) fromEntityToModel(entity *entity.File) *model.Files {
+	return &model.Files{
+		ID:            entity.ID,
+		Name:          entity.Name,
+		FileSize:      entity.FileSize,
+		TosURI:        entity.TosURI,
+		Status:        int32(entity.Status),
+		Comment:       entity.Comment,
+		Source:        int32(entity.Source),
+		CreatorID:     entity.CreatorID,
+		CozeAccountID: entity.CozeAccountID,
+		ContentType:   entity.ContentType,
+		CreatedAt:     entity.CreatedAt,
+		UpdatedAt:     entity.UpdatedAt,
+	}
+}