BDC Dynamic Content Manager Pro (WordPress Plugin)

class BDC_Dynamic_Content_Manager {
    private $option_name = 'bdc_dynamic_content';
    private $revisions_option_name = 'bdc_dynamic_content_revisions';
    private $max_revisions = 20;
    
    // Singleton pattern
    public static function get_instance() { /* ... */ }
    
    // Admin menu
    public function add_admin_menu() { /* ... */ }
    
    // Content management
    public function save_content($key, $value) { /* ... */ }
    
    // Revisions
    public function save_revision($key, $value) { /* ... */ }
    
    // REST API
    public function register_routes() { /* ... */ }
}

// Field type definitions
function bdc_render_field($field, $value) {
    switch ($field['type']) {
        case 'text':
            return '<input type="text" value="' . esc_attr($value) . '" />';
            
        case 'textarea':
            return '<textarea>' . esc_textarea($value) . '</textarea>';
            
        case 'color':
            return '<input type="color" value="' . esc_attr($value) . '" />';
            
        case 'date':
            return '<input type="date" value="' . esc_attr($value) . '" />';
            
        case 'code':
            return '<textarea class="code-editor">' . esc_textarea($value) . '</textarea>';
            
        case 'select':
            $options = $field['options'] ?? [];
            $html = '<select>';
            foreach ($options as $opt => $label) {
                $selected = ($value === $opt) ? 'selected' : '';
                $html .= '<option value="' . $opt . '" ' . $selected . '>' . $label . '</option>';
            }
            $html .= '</select>';
            return $html;
            
        case 'image':
            return bdc_render_image_upload($value);
            
        case ' repeater':
            return bdc_render_repeater($field, $value);
    }
}

function save_revision($key, $value) {
    $revisions = get_option($this->revisions_option_name, []);
    
    if (!isset($revisions[$key])) {
        $revisions[$key] = [];
    }
    
    // Add new revision
    $revisions[$key][] = [
        'content' => $value,
        'timestamp' => current_time('mysql'),
        'author' => get_current_user_id()
    ];
    
    // Keep only max revisions
    if (count($revisions[$key]) > $this->max_revisions) {
        $revisions[$key] = array_slice($revisions[$key], -$this->max_revisions);
    }
    
    update_option($this->revisions_option_name, $revisions);
}

function register_routes() {
    register_rest_route('bdc/v1', '/content', [
        'methods' => 'GET',
        'callback' => [$this, 'get_content'],
        'permission_callback' => '__return_true'
    ]);
    
    register_rest_route('bdc/v1', '/content/(?P<key>\w+)', [
        'methods' => 'GET',
        'callback' => [$this, 'get_content_by_key'],
        'permission_callback' => '__return_true'
    ]);
    
    register_rest_route('bdc/v1', '/content/(?P<key>\w+)', [
        'methods' => 'POST',
        'callback' => [$this, 'update_content'],
        'permission_callback' => function() {
            return current_user_can('manage_options');
        }
    ]);
}

function get_content(WP_REST_Request $request) {
    $content = get_option($this->option_name, []);
    return rest_ensure_response($content);
}

function register_elementor_widgets($widgets_manager) {
    require_once dirname(__FILE__) . '/widgets/dynamic-content-widget.php';
    $widgets_manager->register(new \BDC_Elementor_Widget());
}

function bdc_elementor_render($settings) {
    $content_key = $settings['bdc_content_key'];
    $content = get_option($this->option_name, []);
    
    if (isset($content[$content_key])) {
        return do_shortcode($content[$content_key]);
    }
    
    return '';
}

function export_content() {
    $content = get_option($this->option_name, []);
    $revisions = get_option($this->revisions_option_name, []);
    
    $export_data = [
        'content' => $content,
        'revisions' => $revisions,
        'exported' => current_time('mysql'),
        'version' => BDC_VERSION
    ];
    
    header('Content-Type: application/json');
    header('Content-Disposition: attachment; filename="bdc-export.json"');
    echo json_encode($export_data);
    exit;
}

function import_content($file) {
    $data = json_decode(file_get_contents($file), true);
    
    if (isset($data['content'])) {
        update_option($this->option_name, $data['content']);
    }
    
    if (isset($data['revisions'])) {
        update_option($this->revisions_option_name, $data['revisions']);
    }
}