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Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-backend/app/services/inbound/service_service.py

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+from app import db
+from app.models.inbound.service import StockService
+from app.models.material_base import MaterialBase
+from datetime import datetime, timedelta
+import re
+
+
+class ServiceService:
+    """服务权益库存业务逻辑"""
+
+    SKU_PREFIX = 'SRV'
+    SKU_DATE_FORMAT = '%Y%m%d'
+    SKU_SUFFIX_LEN = 4
+
+    @classmethod
+    def _generate_sku(cls):
+        """生成唯一SKU，格式 SRV-YYYYMMDD-XXXX"""
+        today_str = datetime.now().strftime(cls.SKU_DATE_FORMAT)
+        prefix = f'{cls.SKU_PREFIX}-{today_str}-'
+        # 查找今天已有的最大后缀
+        max_sku = db.session.query(db.func.max(StockService.sku)).filter(
+            StockService.sku.like(f'{prefix}%')
+        ).scalar()
+        if not max_sku:
+            suffix_num = 1
+        else:
+            # 提取后缀数字
+            suffix_part = max_sku.replace(prefix, '')
+            match = re.match(r'^(\d+)', suffix_part)
+            suffix_num = int(match.group(1)) if match else 0
+            suffix_num += 1
+        # 格式化为4位数字，左侧补零
+        suffix = str(suffix_num).zfill(cls.SKU_SUFFIX_LEN)
+        return f'{prefix}{suffix}'
+
+    @classmethod
+    def create_service(cls, data):
+        """创建服务权益记录"""
+        # 检查基础物料是否存在
+        base = MaterialBase.query.get(data.get('base_id'))
+        if not base:
+            raise ValueError('基础物料不存在')
+        # 生成SKU
+        sku = cls._generate_sku()
+        service = StockService(
+            base_id=data['base_id'],
+            sku=sku,
+            sale_price=data['sale_price'],
+            provider_name=data['provider_name'],
+            description=data.get('description', '')
+        )
+        db.session.add(service)
+        db.session.commit()
+        return service
+
+    @classmethod
+    def get_service(cls, service_id):
+        """获取单个服务权益"""
+        service = StockService.query.filter_by(id=service_id, is_deleted=False).first()
+        if not service:
+            raise ValueError('服务权益记录不存在')
+        return service
+
+    @classmethod
+    def update_service(cls, service_id, data):
+        """更新服务权益记录"""
+        service = cls.get_service(service_id)
+        # 不允许修改 base_id 和 sku（业务上不允许变更基础物料）
+        if 'sale_price' in data:
+            service.sale_price = data['sale_price']
+        if 'provider_name' in data:
+            service.provider_name = data['provider_name']
+        if 'description' in data:
+            service.description = data.get('description', '')
+        service.updated_at = datetime.now()
+        db.session.commit()
+        return service
+
+    @classmethod
+    def delete_service(cls, service_id):
+        """软删除服务权益"""
+        service = cls.get_service(service_id)
+        service.is_deleted = True
+        service.updated_at = datetime.now()
+        db.session.commit()
+        return True
+
+    @classmethod
+    def get_service_list(cls, page=1, per_page=20, keyword=None,
+                         start_date=None, end_date=None, provider_name=None):
+        """分页查询服务权益列表"""
+        query = StockService.query.filter_by(is_deleted=False)
+        # 关键词搜索：可搜索 SKU 或 关联物料名称
+        if keyword:
+            # 子查询查找物料名称匹配的 base_id
+            subquery = MaterialBase.query.filter(
+                MaterialBase.name.ilike(f'%{keyword}%')
+            ).subquery()
+            query = query.filter(
+                db.or_(
+                    StockService.sku.ilike(f'%{keyword}%'),
+                    StockService.base_id.in_([row.id for row in db.session.query(subquery.c.id)])
+                )
+            )
+        if start_date:
+            start = datetime.strptime(start_date, '%Y-%m-%d')
+            query = query.filter(StockService.created_at >= start)
+        if end_date:
+            end = datetime.strptime(end_date, '%Y-%m-%d')
+            # 包含当天
+            end = end + timedelta(days=1) - timedelta(seconds=1)
+            query = query.filter(StockService.created_at <= end)
+        if provider_name:
+            query = query.filter(StockService.provider_name.ilike(f'%{provider_name}%'))
+        # 总数
+        total = query.count()
+        # 分页
+        items = query.order_by(StockService.created_at.desc())\
+                     .offset((page - 1) * per_page)\
+                     .limit(per_page).all()
+        return {
+            'items': [item.to_dict() for item in items],
+            'total': total,
+            'page': page,
+            'per_page': per_page
+        }