# 业务路由推荐 — 类图

> 数据模型 + 服务类 + API 类的完整定义

```mermaid
classDiagram
    direction LR

    %% ===== 数据模型 =====
    class BusinessContact {
        +id: int
        +name: str
        +gender: str
        +department: str
        +position: str
        +responsibility: str
        +extension: str
        +service_area: str
        +wecom_userid: str
        +avatar_url: str
        +business_category: str
        +is_active: bool
        +created_at: datetime
        +updated_at: datetime
    }

    class RoutingEvent {
        +id: int
        +conversation_id: str
        +employee_id: str
        +message_content: str
        +business_category: str
        +routing_confidence: float
        +contact_id: int
        +contact_name: str
        +is_clicked: bool
        +created_at: datetime
    }

    %% ===== 服务类 =====
    class RoutingService {
        -ROUTING_PREFILTER_KEYWORDS: list~str~
        -ROUTING_KEYWORD_TO_CATEGORY: dict~str, str~
        -ROUTING_CONFIDENCE_THRESHOLD: float
        +keyword_prefilter(text: str) bool
        +async detect_routing_intent(text: str, employee_id: str) dict
        -async _call_dify_unified_intent(text: str, employee_id: str) dict
        -_fallback_routing_detect(text: str) tuple
        +async get_contact_by_category(category: str, db: AsyncSession) BusinessContact
        +async get_contacts(category: str, keyword: str, db: AsyncSession) list~BusinessContact~
        +async send_contact_card(db, conversation, employee_id, contact, reason) Message
        -async _create_routing_text_message(db, conversation, reason, category) Message
        -async _create_system_hint_message(db, conversation) Message
        +async record_routing_event(db, conversation_id, employee_id, content, category, confidence, contact) RoutingEvent
        -async _push_via_ws(employee_id, conversation, messages) None
    }

    %% ===== API 类 =====
    class RoutingAPI {
        +GET /api/h5/routing/contact
        +GET /api/routing/contacts
        +POST /api/conversations/{id}/send-contact-card
    }

    class ApprovalAPI {
        +POST /api/approval/detect-intent
        -async _call_dify_approval_intent(text, employee_id) dict
    }

    %% ===== Schema 类 =====
    class ApprovalDetectIntentResponse {
        +is_approval_request: bool
        +confidence: float
        +approval_type: str|None
        +source: str
        +intent_type: str
        +business_category: str|None
        +routing_confidence: float
    }

    class ContactCardResponse {
        +id: int
        +name: str
        +gender: str
        +department: str
        +position: str
        +responsibility: str
        +extension: str
        +service_area: str
        +wecom_userid: str
        +avatar_url: str
        +business_category: str
    }

    class SendContactCardRequest {
        +contact_id: int
        +reason: str
    }

    %% ===== 现有类（引用） =====
    class Message {
        +id: str
        +conversation_id: str
        +sender_type: str
        +msg_type: str
        +content: str
        +extra_data: dict
    }

    class H5AiTask {
        +async process_h5_ai_reply(conversation_id, employee_id, content, dify_conversation_id)
        -async _handle_routing(db, conversation, employee_id, content) bool
        -async _handle_byod_query(db, conversation, employee_id, content)
        -async _persist_and_push(db, conversation, employee_id, content, ...)
    }

    class WSManager {
        +async broadcast(data: dict)
        +async broadcast_to_employees(employee_ids: list~str~, data: dict)
    }

    class DifyAPI {
        POST /v1/chat-messages
        +inputs: dict
        +query: str
        +response_mode: "blocking"
        +user: str
    }

    %% ===== 关系 =====
    BusinessContact "1" --> RoutingEvent : contact_id FK

    RoutingService --> BusinessContact : 查询/创建
    RoutingService --> RoutingEvent : 记录
    RoutingService --> Message : 创建contact_card消息
    RoutingService --> WSManager : WS推送
    RoutingService --> DifyAPI : 调用统一意图识别
    RoutingService ..> ApprovalDetectIntentResponse : 解析响应

    RoutingAPI --> RoutingService : 调用
    RoutingAPI ..> ContactCardResponse : 返回
    RoutingAPI ..> SendContactCardRequest : 接收

    ApprovalAPI ..> ApprovalDetectIntentResponse : 返回(扩展)
    ApprovalAPI --> DifyAPI : 调用(同一Dify应用)

    H5AiTask --> RoutingService : 调用_handle_routing
    H5AiTask --> Message : 创建AI消息
    H5AiTask --> WSManager : WS推送

    %% ===== 样式 =====
    style BusinessContact fill:#e8f5e9,stroke:#07C160
    style RoutingEvent fill:#e8f5e9,stroke:#07C160
    style RoutingService fill:#fff3e0,stroke:#ff9800
    style RoutingAPI fill:#e3f2fd,stroke:#1976d2
    style ApprovalAPI fill:#e3f2fd,stroke:#1976d2
    style ApprovalDetectIntentResponse fill:#f3e5f5,stroke:#9c27b0
    style ContactCardResponse fill:#f3e5f5,stroke:#9c27b0
    style SendContactCardRequest fill:#f3e5f5,stroke:#9c27b0
    style Message fill:#f5f5f5,stroke:#9e9e9e
    style H5AiTask fill:#fce4ec,stroke:#e91e63
    style WSManager fill:#f5f5f5,stroke:#9e9e9e
    style DifyAPI fill:#e0f7fa,stroke:#00acc1
```

## 字段详情

### BusinessContact（业务联系人）

| 属性 | 类型 | 说明 |
|------|------|------|
| id | int | PK, 自增 |
| name | str(50) | 联系人姓名 |
| gender | str(10) | male / female |
| department | str(100) | 部门名称（如「行政部」） |
| position | str(100) | 岗位（如「设备管理岗」） |
| responsibility | str(500) | 负责业务描述 |
| extension | str(20) | 分机号 |
| service_area | str(200) | 服务区域/办公地点 |
| wecom_userid | str(100) | 企微用户ID（openEnterpriseChat 用） |
| avatar_url | str(500) | 头像URL（空则用姓名首字渲染） |
| business_category | str(50) | 行政/人力资源/财务/法务/行政-物业 |
| is_active | bool | 是否启用（默认 true） |
| created_at | datetime | 创建时间 |
| updated_at | datetime | 更新时间 |

### RoutingEvent（路由命中统计 — P1）

| 属性 | 类型 | 说明 |
|------|------|------|
| id | int | PK, 自增 |
| conversation_id | str(36) | FK → conversations.id |
| employee_id | str(64) | 员工企微 UserID |
| message_content | str(500) | 触发路由的员工消息（截断） |
| business_category | str(50) | 识别的业务类别 |
| routing_confidence | float | 路由置信度 |
| contact_id | int | FK → business_contacts.id |
| contact_name | str(50) | 联系人姓名（冗余存储） |
| is_clicked | bool | 员工是否点击「联系TA」 |
| created_at | datetime | 创建时间 |

### RoutingService 方法说明

| 方法 | 签名 | 说明 |
|------|------|------|
| keyword_prefilter | (text: str) → bool | 非IT关键词预过滤，命中返回True |
| detect_routing_intent | async (text: str, employee_id: str) → dict | 调用Dify统一意图识别，返回路由判断结果 |
| _call_dify_unified_intent | async (text: str, employee_id: str) → dict | 调用Dify原生API（私有方法） |
| _fallback_routing_detect | (text: str) → tuple | Dify不可用时关键词降级兜底（私有） |
| get_contact_by_category | async (category: str, db) → BusinessContact | 按业务类别查询第一个有效联系人 |
| get_contacts | async (category: str, keyword: str, db) → list[BusinessContact] | 查询联系人列表（坐席端用） |
| send_contact_card | async (db, conversation, employee_id, contact, reason) → Message | 发送名片三段式消息（路由文本+名片+系统提示） |
| record_routing_event | async (db, ...) → RoutingEvent | 记录路由命中事件（P1统计） |