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+# openEuler Copilot Framework AppCenter 设计文档
+
+## 1. 整体设计
+
+AppCenter 是 openEuler Copilot Framework 的应用中心模块, 主要提供以下功能:
+
+- 应用的 CRUD 操作 (创建、读取、更新、删除)
+- 应用收藏管理
+- 最近使用应用记录
+- 应用搜索与过滤
+- 应用发布管理
+
+### 1.1 核心组件
+
+- AppCenter Manager: 应用中心管理器, 提供应用相关的核心业务逻辑
+- AppCenter Router: 提供 HTTP API 接口
+- MongoDB: 存储应用数据
+
+## 2. 数据结构
+
+### 2.1 App 数据模型
+
+![App 数据模型](./uml/appcenter/DB%20AppPool%20数据模型.png)
+
+### 2.2 User 数据模型
+
+![User 数据模型](./uml/appcenter/DB%20User%20数据模型.png)
+
+## 3. 接口设计
+
+### 3.1 HTTP API
+
+| 路径 | 方法 | 描述 |
+|------|------|------|
+| `/api/app` | `GET` | 获取应用列表 |
+| `/api/app` | `POST` | 创建/更新应用 |
+| `/api/app/recent` | `GET` | 获取最近使用应用 |
+| `/api/app/{appId}` | `GET` | 获取应用详情 |
+| `/api/app/{appId}` | `DELETE` | 删除应用 |
+| `/api/app/{appId}` | `POST` | 发布应用 |
+| `/api/app/{appId}` | `PUT` | 修改应用收藏状态 |
+
+## 4. 核心流程
+
+### 4.1 创建应用流程
+
+![创建应用流程](./uml/appcenter/API%20创建应用.png)
+
+### 4.2 应用搜索流程
+
+![应用搜索流程](./uml/appcenter/API%20搜索应用.png)
+
+### 4.3 获取最近使用的应用流程
+
+![获取最近使用的应用流程](./uml/appcenter/API%20获取最近使用的应用.png)
+
+### 4.4 获取应用详情流程
+
+![获取应用详情流程](./uml/appcenter/API%20获取应用详情.png)
+
+### 4.5 删除应用流程
+
+![删除应用流程](./uml/appcenter/API%20删除应用.png)
+
+### 4.6 发布应用流程
+
+![发布应用流程](./uml/appcenter/API%20发布应用.png)
+
+### 4.7 更改应用收藏状态流程
+
+![更改应用收藏状态流程](./uml/appcenter/API%20收藏应用.png)
+
+## 5. 主要功能实现
+
+### 5.1 应用搜索与过滤
+
+支持以下搜索类型:
+
+- 全文搜索 (名称、描述、作者)
+- 按名称搜索
+- 按描述搜索
+- 按作者搜索
+
+### 5.2 应用收藏管理
+
+- 支持收藏/取消收藏应用
+- 记录用户收藏列表
+- 支持获取收藏应用列表
+
+### 5.3 最近使用记录
+
+- 记录应用使用次数和最后使用时间
+- 支持获取最近使用应用列表
+- 按最后使用时间排序
+
+## 6. 安全性设计
+
+- 接口鉴权: 依赖 `verify_user` 中间件进行用户认证
+- CSRF 防护: 使用 `verify_csrf_token` 中间件
+- 权限控制: 应用删除、发布等操作需验证用户身份
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diff --git a/docs/design/uml/appcenter/api_create_app.puml b/docs/design/uml/appcenter/api_create_app.puml
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+@startuml API 创建应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: POST /api/app
+Router -> Manager: create_app()
+Manager -> MongoDB: insert app data
+MongoDB --> Manager: return app_id
+Manager --> Router: return app_id
+Router --> User: return success response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_delete_app.puml b/docs/design/uml/appcenter/api_delete_app.puml
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+@startuml API 删除应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+participant "FlowManager" as FlowManager
+database MongoDB
+
+User -> Router: DELETE /api/app/{appId}
+Router -> Manager: fetch_app_data_by_id()
+MongoDB --> Manager: return app data
+Router -> Router: verify author
+Router -> FlowManager: delete_flow_by_app_and_flow_id()
+FlowManager -> MongoDB: delete flows
+Router -> Manager: delete_app()
+Manager -> MongoDB: start transaction
+Manager -> MongoDB: delete app
+Manager -> MongoDB: update user app_usage
+MongoDB -> MongoDB: commit transaction
+Manager --> Router: return result
+Router --> User: return response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_fav_app.puml b/docs/design/uml/appcenter/api_fav_app.puml
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+@startuml API 收藏应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: PUT /api/app/{appId}
+Router -> Manager: modify_favorite_app()
+Manager -> MongoDB: find app
+MongoDB --> Manager: return app data
+Manager -> Manager: verify favorite status
+Manager -> MongoDB: update favorites array
+Manager --> Router: return ModFavAppFlag
+Router --> User: return response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_fetch_app_data.puml b/docs/design/uml/appcenter/api_fetch_app_data.puml
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+@startuml API 获取应用详情
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: GET /api/app/{appId}
+Router -> Manager: fetch_app_data_by_id()
+Manager -> MongoDB: find_one app
+MongoDB --> Manager: return app data
+Manager -> Manager: build app property
+Manager --> Router: return app details
+Router --> User: return response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_fetch_recent_app.puml b/docs/design/uml/appcenter/api_fetch_recent_app.puml
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+@startuml API 获取最近使用的应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: GET /api/app/recent
+Router -> Manager: get_recently_used_apps()
+Manager -> MongoDB: find user data
+MongoDB --> Manager: return user data
+Manager -> MongoDB: find app data
+MongoDB --> Manager: return app data
+Manager -> Manager: sort by last_used time
+Manager --> Router: return recent apps
+Router --> User: return response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_publish_app.puml b/docs/design/uml/appcenter/api_publish_app.puml
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+@startuml API 发布应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: POST /api/app/{appId}
+Router -> Manager: fetch_app_data_by_id()
+MongoDB --> Manager: return app data
+Router -> Router: verify author
+Router -> Manager: publish_app()
+Manager -> MongoDB: update published status
+Manager --> Router: return result
+Router --> User: return response
+@enduml
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diff --git a/docs/design/uml/appcenter/api_serach_app.puml b/docs/design/uml/appcenter/api_serach_app.puml
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+@startuml API 搜索应用
+actor User
+participant "AppCenter Router" as Router
+participant "AppCenter Manager" as Manager
+database MongoDB
+
+User -> Router: GET /api/app with filters
+Router -> Manager: fetch_all_apps()
+Manager -> Manager: build search filters
+Manager -> MongoDB: find with filters
+MongoDB --> Manager: return apps
+Manager -> Manager: build response items
+Manager --> Router: return app list
+Router --> User: return apps response
+@enduml
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diff --git a/docs/design/uml/appcenter/db_app_pool.puml b/docs/design/uml/appcenter/db_app_pool.puml
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+@startuml DB AppPool 数据模型
+class AppPool {
+  - id: str
+  - name: str  
+  - description: str
+  - author: str
+  - icon: str
+  - links: List[str]
+  - first_questions: List[str]
+  - history_len: int
+  - permission: Permission
+  - flows: List[Flow]
+  - favorites: List[str]
+  - published: bool
+  - created_at: datetime
+}
+
+class Permission {
+  - type: str
+  - users: List[str]
+}
+
+class AppData {
+  - app_id: str
+  - name: str
+  - description: str
+  - icon: str
+  - links: List[str]
+  - first_questions: List[str]
+  - history_len: int
+  - permission: Permission
+  - workflows: List[str]
+}
+
+class AppCenterCardItem {
+  - appId: str
+  - icon: str
+  - name: str
+  - description: str 
+  - author: str
+  - favorited: bool
+  - published: bool
+}
+
+AppPool --> Permission
+AppData --> Permission
+@enduml
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diff --git a/docs/design/uml/appcenter/db_user.puml b/docs/design/uml/appcenter/db_user.puml
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index 0000000000000000000000000000000000000000..f2e5b15881f66175846a2f3fb40ecd2090319e9e
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+@startuml DB User 数据模型
+class User {
+  _id: str
+  last_login: float
+  is_active: bool
+  is_whitelisted: bool
+  credit: int
+  api_key: Optional[str]
+  kb_id: Optional[str]
+  conversations: List[str]
+  domains: List[UserDomainData]
+  app_usage: Dict[str, AppUsageData]
+}
+
+class AppUsageData {
+  count: int
+  last_used: float
+}
+
+class UserDomainData {
+  name: str
+  count: int
+}
+
+User --> AppUsageData
+User --> UserDomainData
+@enduml
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