# Forms Feature Implementation

## Overview
Complete implementation of GoHighLevel Forms management feature with AJAX loading, shortcode generation, and click-to-copy functionality.

## Files Modified/Created

### 1. **src/Core/MenuManager.php**
**Added:**
- AJAX handler registration: `wp_ajax_ghl_crm_get_forms` (line 59)
- Forms submenu item in admin menu (lines 127-135)
- Forms case in SPA router (lines 327-329)
- `get_forms_data()` method (lines 625-639)
- `handle_get_forms()` AJAX handler (lines 530-575)

**Functionality:**
- Registers forms submenu with hash routing: `ghl-crm-admin#/forms`
- Handles SPA view loading for forms page
- AJAX endpoint for fetching forms from GHL API
- Security: nonce verification, permission checks, connection validation

### 2. **src/API/Resources/FormsResource.php** (NEW)
**Purpose:** Handles all GoHighLevel Forms API operations

**Methods:**
- `get_forms($force_refresh)` - Fetch all forms with caching (30 min)
- `get_form($form_id)` - Fetch single form by ID
- `clear_cache()` - Clear forms cache
- `get_submission_count($form_id)` - Get form submission count
- `process_forms($forms)` - Normalize multiple forms data
- `process_form($form)` - Normalize single form data

**Features:**
- Transient caching for 30 minutes
- Automatic data normalization
- Error handling with APIException
- Cache-first approach with force refresh option

### 3. **templates/admin/forms.php** (CREATED EARLIER)
**Purpose:** Forms management interface

**Features:**
- Connection verification check
- Loading/error states
- AJAX-based form loading
- Forms list with metadata display
- Shortcode generation: `[ghl_form id="xxx"]`
- Click-to-copy shortcode functionality
- Refresh button
- Empty state message

**JavaScript:**
- FormsManager object with methods:
  - `init()` - Initialize and load forms
  - `bindEvents()` - Bind UI event handlers
  - `loadForms()` - AJAX call to fetch forms
  - `renderForms(forms)` - Render forms list HTML
  - `showError(message)` - Display error messages
  - `copyShortcode()` - Copy to clipboard functionality
  - `escapeHtml(text)` - Security helper

### 4. **templates/admin/spa-app.php** (MODIFIED EARLIER)
**Added:**
- Forms navigation tab with icon (lines 44-47)
- Route: `#/forms`
- Icon: `fa-solid fa-file-lines`

## Data Flow

### Loading Forms:
1. User navigates to Forms tab via menu or URL hash
2. SPA router loads forms.php template
3. Template checks connection status
4. JavaScript triggers AJAX call to `ghl_crm_get_forms`
5. MenuManager::handle_get_forms() validates and calls FormsResource
6. FormsResource checks cache → API → normalizes data
7. JSON response returns forms array
8. JavaScript renders forms with shortcodes

### API Structure:
```
GET /locations/{location_id}/forms
Response: {
  forms: [
    {
      id: string,
      name: string,
      locationId: string,
      submissions: number,
      createdAt: string,
      updatedAt: string,
      fields: array,
      settings: object
    }
  ]
}
```

## Security Features

1. **Nonce Verification:**
   - AJAX: `ghl_crm_forms_nonce`
   - SPA routing: `ghl_crm_spa_nonce`

2. **Permission Checks:**
   - `manage_options` capability required
   - Connection verification before API calls

3. **Input Sanitization:**
   - All user inputs sanitized
   - HTML escaping in template output
   - JavaScript escapeHtml() for dynamic content

4. **Output Escaping:**
   - All template strings use `esc_html__()`, `esc_attr_e()`, `esc_js()`
   - Dynamic content escaped via JavaScript

## Caching Strategy

- **Cache Key:** `ghl_crm_forms_list`
- **Duration:** 1800 seconds (30 minutes)
- **Storage:** WordPress transients
- **Invalidation:** Manual refresh button or force_refresh parameter

## Next Steps (Not Yet Implemented)

### 1. Form Rendering Shortcode
Create `[ghl_form id="xxx"]` shortcode handler:
- Fetch form schema from GHL API
- Render form HTML with fields
- Handle form styling
- Add frontend JavaScript for interactions

### 2. Form Submission Handler
- Create AJAX endpoint for form submissions
- Validate and sanitize form data
- POST to GHL Forms API
- Handle success/error responses
- Show confirmation messages

### 3. Form Preview
- Add preview functionality to "Preview" button
- Modal or new tab with form rendering
- Test form without submission

### 4. Form Analytics
- Display submission statistics
- Last submission date
- Conversion rates
- Integration with GHL analytics

## Testing Checklist

- [ ] Forms menu item appears in admin
- [ ] Forms tab accessible via hash routing
- [ ] Connection check displays correctly
- [ ] Forms load via AJAX without errors
- [ ] Empty state displays when no forms
- [ ] Error states display properly
- [ ] Shortcode click-to-copy works
- [ ] Refresh button reloads forms
- [ ] Cache expires after 30 minutes
- [ ] Forms display with correct metadata
- [ ] No PHP errors in logs
- [ ] No JavaScript console errors
- [ ] Nonce verification works
- [ ] Permission checks prevent unauthorized access

## Code Quality

- ✅ PSR-4 autoloading compliant
- ✅ WordPress coding standards
- ✅ PHPDoc blocks for all methods
- ✅ Type declarations (strict_types=1)
- ✅ Security: sanitization, escaping, nonces
- ✅ Error handling with exceptions
- ✅ ABSPATH check in all PHP files
- ✅ Singleton pattern for MenuManager
- ✅ Dependency injection for Client
- ✅ Clean separation of concerns

## API Endpoints Used

### Current:
- `GET /locations/{location_id}/forms` - List all forms

### Future (for shortcode):
- `GET /locations/{location_id}/forms/{form_id}` - Get single form
- `POST /locations/{location_id}/forms/{form_id}/submissions` - Submit form

## Configuration

No additional configuration required. Uses existing:
- API token/OAuth credentials
- Location ID
- Connection verification

## Performance Optimizations

1. **Caching:** 30-minute transient cache reduces API calls
2. **Lazy Loading:** Forms only loaded when tab accessed
3. **AJAX:** No page reloads, instant navigation
4. **Minimal DOM:** Efficient HTML rendering
5. **Cache-First:** Check cache before API call

## Error Handling

1. **Connection Not Verified:** Displays warning message with link to settings
2. **API Errors:** Shows user-friendly error messages
3. **Empty Forms:** Displays helpful empty state
4. **AJAX Failures:** Shows error with "AJAX error" prefix
5. **Exceptions:** Caught and converted to JSON error responses

## Multisite Compatibility

- ✅ Uses site-specific options
- ✅ Transients scoped to current site
- ✅ No global state pollution
- ✅ Works with `switch_to_blog()`

## Localization

All strings wrapped in translation functions:
- `__()` for return values
- `esc_html_e()` for echo output
- `esc_html__()` for escaped output
- Text domain: `ghl-crm-integration`

## Dependencies

- WordPress 5.0+
- GoHighLevel account with forms
- Active GHL connection (OAuth or API key)
- jQuery (WordPress core)
- Font Awesome icons (already loaded)
