# API 接口文档

## 概述

PR-Helper 提供 RESTful JSON API 和 SSE 流式端点。所有 API 都需要认证（除登录/注册外）。

## 认证

### 会话认证

- 基于 Cookie 的会话
- Cookie 名称: `pr_session`
- 有效期: 7 天
- HttpOnly: true

### 认证头

所有受保护的 API 需要有效的会话 Cookie。

## 公开端点

### 登录页面

```
GET /login
```

返回登录页面 HTML。

### 注册页面

```
GET /register
```

返回注册页面 HTML。

### 用户登录

```
POST /api/auth/login
Content-Type: application/json

{
  "email": "user@example.com",
  "password": "password123"
}
```

**响应**:

```json
{
  "message": "登录成功"
}
```

**错误**:

```json
{
  "error": "邮箱或密码错误"
}
```

### 用户注册

```
POST /api/auth/register
Content-Type: application/json

{
  "email": "user@example.com",
  "password": "password123"
}
```

**响应**:

```json
{
  "message": "注册成功"
}
```

### 用户登出

```
POST /api/auth/logout
```

**响应**:

```json
{
  "message": "已登出"
}
```

## 页面端点

### 首页

```
GET /
```

返回首页 HTML（仓库列表）。

### 仓库详情页

```
GET /repo/:id
```

返回仓库详情页 HTML（Git 图形、差异查看器等）。

### 设置页

```
GET /settings
```

返回设置页面 HTML。

## 仓库管理 API

### 获取仓库列表

```
GET /api/repos
```

**响应**:

```json
[
  {
    "id": 1,
    "url": "https://github.com/user/repo.git",
    "local_path": "data/repos/user_repo.git_1234567890",
    "size_bytes": 1048576,
    "cloned_at": "2024-01-01T00:00:00Z",
    "last_used": "2024-01-01T12:00:00Z",
    "auth_type": "none"
  }
]
```

### 克隆仓库

```
POST /api/repos
Content-Type: application/json

{
  "url": "https://github.com/user/repo.git",
  "auth_type": "none",
  "credential": ""
}
```

**认证类型**:

- `none`: 无认证
- `https`: HTTPS 基本认证（credential = "username:password"）

**响应 (SSE 流)**:

```
event: progress
data: {"step":"开始克隆","current":0,"total":0}

event: progress
data: {"step":"克隆完成","current":1,"total":1}

event: done
data: {"repo_id":1,"branches":["main","dev"],"tags":["v1.0"],"commit_num":100}
```

### 删除仓库

```
DELETE /api/repos/:id
```

**响应**:

```json
{
  "message": "仓库已删除"
}
```

### 清理仓库缓存

```
POST /api/repos/:id/cleanup
```

删除并重新克隆仓库。

**响应 (SSE 流)**:

```
event: progress
data: {"step":"清理完成"}

event: progress
data: {"step":"开始克隆"}

event: done
data: {"repo_id":1}
```

### 拉取更新

```
POST /api/repos/:id/pull
```

**响应 (SSE 流)**:

```
event: progress
data: {"step":"拉取完成"}

event: done
data: {"commit_num":105,"branches":["main","dev"]}
```

### 获取 Git 图形

```
GET /api/repos/:id/graph
```

**响应**:

```json
{
  "commits": [
    {
      "hash": "abc123...",
      "short_hash": "abc1234",
      "message": "feat: add new feature",
      "author": "John Doe",
      "email": "john@example.com",
      "timestamp": "2024-01-01T12:00:00Z",
      "parent_ids": ["def456..."]
    }
  ],
  "refs": [
    {
      "name": "main",
      "hash": "abc123...",
      "is_head": true,
      "is_tag": false
    },
    {
      "name": "v1.0",
      "hash": "abc123...",
      "is_head": false,
      "is_tag": true
    }
  ],
  "edges": [
    {
      "source": "abc123...",
      "target": "def456..."
    }
  ]
}
```

### 获取引用列表

```
GET /api/repos/:id/refs
```

**响应**:

```json
[
  {
    "name": "main",
    "hash": "abc123...",
    "is_head": true,
    "is_tag": false
  },
  {
    "name": "v1.0",
    "hash": "abc123...",
    "is_head": false,
    "is_tag": true
  }
]
```

### 获取提交列表

```
GET /api/repos/:id/commits?ref=main&limit=50
```

**参数**:

| 参数 | 类型 | 必需 | 说明 |
|------|------|------|------|
| ref | string | 否 | 分支/标签名（默认 HEAD） |
| limit | int | 否 | 最大提交数（默认 50） |

**响应**:

```json
[
  {
    "hash": "abc123...",
    "short_hash": "abc1234",
    "message": "feat: add new feature",
    "author": "John Doe",
    "email": "john@example.com",
    "timestamp": "2024-01-01T12:00:00Z",
    "parent_ids": ["def456..."]
  }
]
```

### 获取差异

```
GET /api/repos/:id/diff?base=main&head=feature
```

**参数**:

| 参数 | 类型 | 必需 | 说明 |
|------|------|------|------|
| base | string | 是 | 基准分支/标签/提交 |
| head | string | 是 | 目标分支/标签/提交 |
| per_file | bool | 否 | 是否按文件返回 |

**响应 (统一差异)**:

```json
{
  "diff": "diff --git a/main.go b/main.go\n..."
}
```

**响应 (按文件)**:

```json
[
  {
    "filename": "main.go",
    "patch": "diff --git a/main.go b/main.go\n..."
  }
]
```

## PR 生成 API

### 生成 PR 描述

```
POST /api/repos/:id/generate
Content-Type: application/json

{
  "base": "main",
  "head": "feature"
}
```

**响应 (SSE 流)**:

```
event: content
data: {"content":"# 标题\n\n"}

event: content
data: {"content":"**类型**: feat\n\n"}

event: content
data: {"content":"## 概述\n..."}

event: done
data: {"content":""}
```

## 代码审查 API

### 执行代码审查

```
POST /api/repos/:id/review
Content-Type: application/json

{
  "base": "main",
  "head": "feature",
  "top_n": 20,
  "concurrency": 5
}
```

**参数**:

| 参数 | 类型 | 必需 | 说明 |
|------|------|------|------|
| base | string | 是 | 基准分支 |
| head | string | 是 | 目标分支 |
| top_n | int | 否 | 审查文件数上限（默认 20） |
| concurrency | int | 否 | 并发数（默认 5） |

**响应 (SSE 流)**:

```
event: start
data: {"total_files":30,"reviewed_files":20,"top_n":20}

event: file_start
data: {"file":"main.go","index":1,"total":20}

event: content
data: {"content":"..."}

event: suggestion
data: {"file":"main.go","severity":"warning","content":"..."}

event: file_end
data: {"file":"main.go"}

event: summary
data: {"score":7,"overall":"...","findings":"...","recommendations":"..."}

event: analysis_saved
data: {"analysis_id":1}

event: done
data: {"content":""}
```

### 获取审查历史

```
GET /api/repos/:id/review/analyses
```

**响应**:

```json
[
  {
    "id": 1,
    "base_ref": "main",
    "head_ref": "feature",
    "created_at": "2024-01-01T12:00:00Z"
  }
]
```

### 获取单个审查结果

```
GET /api/repos/:id/review/analyses/:aid
```

**响应**:

```json
{
  "id": 1,
  "base_ref": "main",
  "head_ref": "feature",
  "created_at": "2024-01-01T12:00:00Z",
  "result": {
    "file_reviews": [...],
    "summary": {...},
    "top_n": 20
  }
}
```

### 保存审查笔记

```
POST /api/repos/:id/review/notes
Content-Type: application/json

{
  "analysis_id": 1,
  "scope": "file",
  "scope_key": "main.go",
  "content": "这个文件需要重构"
}
```

**scope 类型**:

| scope | scope_key | 说明 |
|-------|-----------|------|
| overall | (空) | 整体笔记 |
| file | 文件名 | 文件级笔记 |
| suggestion | 建议 ID | 建议级笔记 |

**响应**:

```json
{
  "id": 1,
  "analysis_id": 1,
  "scope": "file",
  "scope_key": "main.go",
  "content": "这个文件需要重构",
  "created_at": "2024-01-01T12:00:00Z",
  "updated_at": "2024-01-01T12:00:00Z"
}
```

### 获取审查笔记

```
GET /api/repos/:id/review/notes?analysis_id=1&scope=file
```

**参数**:

| 参数 | 类型 | 必需 | 说明 |
|------|------|------|------|
| analysis_id | int | 是 | 分析 ID |
| scope | string | 否 | 过滤作用域 |

**响应**:

```json
[
  {
    "id": 1,
    "analysis_id": 1,
    "scope": "file",
    "scope_key": "main.go",
    "content": "这个文件需要重构",
    "created_at": "2024-01-01T12:00:00Z",
    "updated_at": "2024-01-01T12:00:00Z"
  }
]
```

## 设置 API

### 获取设置

```
GET /api/settings
```

**响应**:

```json
{
  "llm.endpoint": "https://api.deepseek.com",
  "llm.api_key": "sk-...",
  "llm.model": "deepseek-v4-pro",
  "review.top_n": "20",
  "review.concurrency": "5",
  "cache.max_age_days": "7",
  "cache.max_size_mb": "5000"
}
```

### 更新设置

```
PUT /api/settings
Content-Type: application/json

{
  "llm.endpoint": "https://api.openai.com",
  "llm.api_key": "sk-...",
  "llm.model": "gpt-4"
}
```

**响应**:

```json
{
  "message": "设置已更新"
}
```

## 错误响应

### 格式

```json
{
  "error": "错误信息"
}
```

### 常见状态码

| 状态码 | 说明 |
|--------|------|
| 200 | 成功 |
| 400 | 请求参数错误 |
| 401 | 未认证 |
| 404 | 资源不存在 |
| 500 | 服务器内部错误 |

## SSE 协议

### 事件格式

```
event: {event_name}
data: {json_data}

```

- 每个事件以 `event:` 开头
- 数据以 `data:` 开头
- 事件之间用空行分隔
- 数据必须是有效的 JSON

### 客户端实现

```javascript
SSE.post(url, body, {
    eventName: (data) => {
        // 处理事件
    },
    error: (data) => {
        // 处理错误
    },
    done: () => {
        // 流结束
    }
});
```

### 中断请求

```javascript
const controller = SSE.post(url, body, handlers);
// 中断
controller.abort();
```

## 限流

当前无速率限制。建议在反向代理层实现限流。

## CORS

当前不支持跨域请求。仅限同源访问。