# Server Actions Contract: Policy Search

**Feature**: 001-global-policy-search  
**Type**: Next.js Server Actions

---

## Overview

Server Actions for the Global Policy Search feature. These actions are called directly from React Server Components and Client Components without API routes.

---

## Action: searchPolicySettings

**File**: `lib/actions/policySettings.ts`

### Signature

```typescript
'use server';

export async function searchPolicySettings(
  searchTerm: string
): Promise<SearchResult>;
```

### Input

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `searchTerm` | string | Yes | Search query (min 2 chars) |

### Output

```typescript
interface SearchResult {
  success: boolean;
  data?: PolicySettingSearchResult[];
  error?: string;
  totalCount?: number;
}

interface PolicySettingSearchResult {
  id: string;
  policyName: string;
  policyType: string;
  settingName: string;
  settingValue: string;
  lastSyncedAt: Date;
}
```

### Behavior

1. **Authentication**: Validates user session via `getUserAuth()`
2. **Tenant Isolation**: Extracts `tenantId` from session, filters all queries
3. **Search**: Case-insensitive search on `settingName` and `settingValue`
4. **Limit**: Returns max 100 results, sorted by `settingName`

### Error Responses

| Condition | Response |
|-----------|----------|
| Not authenticated | `{ success: false, error: 'Unauthorized' }` |
| Search term < 2 chars | `{ success: false, error: 'Search term too short' }` |
| No tenant ID in session | `{ success: false, error: 'Tenant not found' }` |
| Database error | `{ success: false, error: 'Search failed' }` |

### Example Usage (Client Component)

```typescript
'use client';

import { searchPolicySettings } from '@/lib/actions/policySettings';
import { useState, useTransition } from 'react';

function SearchForm() {
  const [results, setResults] = useState([]);
  const [isPending, startTransition] = useTransition();

  const handleSearch = (formData: FormData) => {
    const query = formData.get('query') as string;
    startTransition(async () => {
      const result = await searchPolicySettings(query);
      if (result.success) {
        setResults(result.data ?? []);
      }
    });
  };

  return (
    <form action={handleSearch}>
      <input name="query" placeholder="Search settings..." />
      <button type="submit" disabled={isPending}>
        {isPending ? 'Searching...' : 'Search'}
      </button>
    </form>
  );
}
```

---

## Action: getPolicySettingById

**File**: `lib/actions/policySettings.ts`

### Signature

```typescript
'use server';

export async function getPolicySettingById(
  id: string
): Promise<GetSettingResult>;
```

### Input

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `id` | string | Yes | Policy setting ID (CUID2) |

### Output

```typescript
interface GetSettingResult {
  success: boolean;
  data?: PolicySetting;
  error?: string;
}
```

### Behavior

1. **Authentication**: Validates user session
2. **Tenant Isolation**: Ensures setting belongs to user's tenant
3. **Return**: Full policy setting record or null

---

## Action: getRecentPolicySettings

**File**: `lib/actions/policySettings.ts`

### Signature

```typescript
'use server';

export async function getRecentPolicySettings(
  limit?: number
): Promise<RecentSettingsResult>;
```

### Input

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `limit` | number | No | 20 | Max results (1-100) |

### Output

```typescript
interface RecentSettingsResult {
  success: boolean;
  data?: PolicySettingSearchResult[];
  error?: string;
}
```

### Behavior

1. **Authentication**: Validates user session
2. **Tenant Isolation**: Filters by `tenantId`
3. **Sort**: By `lastSyncedAt` descending
4. **Limit**: Capped at 100

---

## Security Invariants

All Server Actions MUST:

1. ✅ Call `getUserAuth()` at the start
2. ✅ Return `{ success: false, error: 'Unauthorized' }` if no session
3. ✅ Extract `tenantId` from session
4. ✅ Include `tenantId` in ALL database queries (WHERE clause)
5. ✅ Never expose settings from other tenants
6. ✅ Validate and sanitize all input parameters

---

## Type Exports

```typescript
// lib/actions/policySettings.ts

export type {
  SearchResult,
  GetSettingResult,
  RecentSettingsResult,
  PolicySettingSearchResult,
};
```