<?php
/**
 * Meta Boxes support for custom post types
 *
 * @package WordPress
 * @subpackage ThemeREX Addons
 * @since v1.1
 */

// Don't load directly
if ( ! defined( 'TRX_ADDONS_VERSION' ) ) {
	die( '-1' );
}


// Return true if current screen need to load options scripts and styles
if ( !function_exists( 'trx_addons_meta_box_need_options' ) ) {
	add_filter('trx_addons_filter_need_options', 'trx_addons_meta_box_need_options');
	function trx_addons_meta_box_need_options($need = false) {
		if (!$need) {
			// If current screen is 'Edit Page' with one of ThemeREX Addons custom post types
			$screen = function_exists('get_current_screen') ? get_current_screen() : false;
			$need = is_object($screen) && $screen->id==$screen->post_type && trx_addons_meta_box_is_registered($screen->post_type);
		}
		return $need;
	}
}

// Register meta box fields array for the specified post type
if (!function_exists('trx_addons_meta_box_register')) {
	function trx_addons_meta_box_register($post_type, $meta_box) {
		if (!empty($post_type)) {
			global $TRX_ADDONS_STORAGE;
			$TRX_ADDONS_STORAGE['post_types'][] = $post_type;
			$TRX_ADDONS_STORAGE["meta_box_{$post_type}"] = apply_filters('trx_addons_filter_meta_box_fields', $meta_box, $post_type);
		}
	}
}

// Check if meta box for the specified post type is registered
if (!function_exists('trx_addons_meta_box_is_registered')) {
	function trx_addons_meta_box_is_registered($post_type) {
		global $TRX_ADDONS_STORAGE;
		return !empty($TRX_ADDONS_STORAGE['post_types']) && in_array($post_type, $TRX_ADDONS_STORAGE['post_types']);
	}
}

// Return meta box fields array for the specified post type
if (!function_exists('trx_addons_meta_box_get')) {
	function trx_addons_meta_box_get($post_type) {
		global $TRX_ADDONS_STORAGE;
		return isset($TRX_ADDONS_STORAGE["meta_box_{$post_type}"]) ? $TRX_ADDONS_STORAGE["meta_box_{$post_type}"] : array();
	}
}

// Add meta box
if (!function_exists('trx_addons_meta_box_add')) {
    add_action('add_meta_boxes', 'trx_addons_meta_box_add');
    function trx_addons_meta_box_add() {
        global $post_type;
        if (trx_addons_meta_box_is_registered($post_type)) {
            add_meta_box('trx_addons_meta_box',
                            esc_html__('Item Options', 'trx_addons'),
                            'trx_addons_meta_box_show',
                            $post_type,
                            apply_filters('trx_addons_filter_add_meta_box_context', 'advanced', $post_type),
                            apply_filters('trx_addons_filter_add_meta_box_priority', 'default', $post_type)
                        );
        }
        // Custom theme-specific meta-boxes
        $boxes = apply_filters('trx_addons_filter_override_options', array());
        if (is_array($boxes)) {
            foreach ($boxes as $box) {
                $box = trx_addons_array_merge(array('',            // id
                                                    '',            // title
                                                    '',            // callback
                                                    null,        // screen
                                                    'advanced',    // context
                                                    'default',    // priority
                                                    null        // callbacks
                                                    ),
                                                $box);
                add_meta_box($box[0], $box[1], $box[2], $box[3], $box[4], $box[5], $box[6]);
            }
        }
    }
}

// Callback function to show fields in meta box
if (!function_exists('trx_addons_meta_box_show')) {
	function trx_addons_meta_box_show() {
		global $post, $post_type;
		if (trx_addons_meta_box_is_registered($post_type)) {
			// Load saved options 
			$options = get_post_meta($post->ID, 'trx_addons_options', true);
			$meta_box = trx_addons_meta_box_get($post_type);
			foreach ($meta_box as $k=>$v) {
				if (isset($meta_box[$k]['std']))
					$meta_box[$k]['val'] = isset($options[$k]) ? $options[$k] : $meta_box[$k]['std'];
			}
			?>
			<div class="trx_addons_options">
				<input type="hidden" name="meta_box_post_nonce" value="<?php echo esc_attr(wp_create_nonce(admin_url())); ?>" />
				<input type="hidden" name="meta_box_post_type" value="<?php echo esc_attr($post_type); ?>" />
				<?php trx_addons_options_show_fields($meta_box, $post_type); ?>
			</div>
			<?php		
		}
	}
}

// Save data from meta box
if (!function_exists('trx_addons_meta_box_save')) {
	add_action('save_post', 'trx_addons_meta_box_save');
	function trx_addons_meta_box_save($post_id) {

		// verify nonce
		if ( !wp_verify_nonce( trx_addons_get_value_gp('meta_box_post_nonce'), admin_url() ) )
			return $post_id;

		// check autosave
		if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
			return $post_id;
		}

		$post_type = isset($_POST['meta_box_post_type']) ? $_POST['meta_box_post_type'] : $_POST['post_type'];
		if (!trx_addons_meta_box_is_registered($post_type)) {
			return $post_id;
		}

		// check permissions
		$capability = 'post';
		$post_types = get_post_types( array( 'name' => $post_type), 'objects' );
		if (!empty($post_types) && is_array($post_types)) {
			foreach ($post_types  as $type) {
				$capability = $type->capability_type;
				break;
			}
		}
		if (!current_user_can('edit_'.($capability), $post_id)) {
			return $post_id;
		}

		// Save meta
		$options = array();
		$meta_box = trx_addons_meta_box_get($post_type);
		foreach ($meta_box as $k=>$v) {
			// Skip options without value (section, info, etc.)
			if (!isset($v['std'])) continue;
			// Get option value from POST
			$options[$k] = trx_addons_options_get_field_value($k, $v);
			if ($k == 'icon' && strtolower($options[$k]) == 'none') $options[$k] = '';
		}
		update_post_meta($post_id, 'trx_addons_options', apply_filters('trx_addons_filter_save_post_options', $options, $post_id, $post_type));
	}
}
?>