feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/domain/template/internal/dal/template.go

@@ -0,0 +1,129 @@
+/*
+ * 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 dal
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"gorm.io/gorm"
+
+	"github.com/coze-dev/coze-studio/backend/domain/template/entity"
+	"github.com/coze-dev/coze-studio/backend/domain/template/internal/dal/model"
+	"github.com/coze-dev/coze-studio/backend/domain/template/internal/dal/query"
+	"github.com/coze-dev/coze-studio/backend/infra/contract/idgen"
+)
+
+var (
+	once              sync.Once
+	singletonTemplate *TemplateImpl
+)
+
+type TemplateImpl struct {
+	IDGen idgen.IDGenerator
+	query *query.Query
+}
+
+func NewTemplateDAO(db *gorm.DB, idGen idgen.IDGenerator) *TemplateImpl {
+	once.Do(func() {
+		singletonTemplate = &TemplateImpl{
+			IDGen: idGen,
+			query: query.Use(db),
+		}
+	})
+
+	return singletonTemplate
+}
+
+// Create implements TemplateRepository.Create
+func (t *TemplateImpl) Create(ctx context.Context, template *model.Template) (int64, error) {
+	if template.ID == 0 {
+		id, err := t.IDGen.GenID(ctx)
+		if err != nil {
+			return 0, err
+		}
+		template.ID = id
+	}
+
+	err := t.query.Template.WithContext(ctx).Create(template)
+	if err != nil {
+		return 0, err
+	}
+
+	return template.ID, nil
+}
+
+// List lists templates with filters
+func (t *TemplateImpl) List(ctx context.Context, filter *entity.TemplateFilter, page *entity.Pagination, orderByField string) ([]*model.Template, int64, error) {
+	res := t.query.Template
+
+	q := res.WithContext(ctx)
+
+	// Add filter conditions
+	if filter != nil {
+		if filter.AgentID != nil {
+			q = q.Where(res.AgentID.Eq(*filter.AgentID))
+		}
+
+		if filter.SpaceID != nil {
+			q = q.Where(res.SpaceID.Eq(*filter.SpaceID))
+		}
+
+		if filter.ProductEntityType != nil {
+			q = q.Where(res.ProductEntityType.Eq(*filter.ProductEntityType))
+		}
+	}
+
+	// Get total count
+	count, err := q.Count()
+	if err != nil {
+		return nil, 0, fmt.Errorf("count templates failed: %v", err)
+	}
+
+	// Apply pagination
+	limit := int64(50) // default limit
+	if page != nil && page.Limit > 0 {
+		limit = int64(page.Limit)
+	}
+
+	offset := 0
+	if page != nil && page.Offset > 0 {
+		offset = page.Offset
+	}
+
+	if len(orderByField) > 0 {
+		switch orderByField {
+		case "created_at":
+			q = q.Order(res.CreatedAt.Desc())
+		case "heat":
+			q = q.Order(res.Heat.Desc())
+		default:
+			q = q.Order(res.CreatedAt.Desc())
+		}
+	} else {
+		q = q.Order(res.CreatedAt.Desc())
+	}
+
+	// Execute query with pagination
+	records, err := q.Limit(int(limit)).Offset(offset).Find()
+	if err != nil {
+		return nil, 0, fmt.Errorf("list templates failed: %v", err)
+	}
+
+	return records, count, nil
+}