<?php
// exit if accessed directly
if ( ! defined( 'ABSPATH' ) )
	exit;

/**
 * Post_Views_Counter_Dashboard class.
 *
 * @class Post_Views_Counter_Dashboard
 */
class Post_Views_Counter_Dashboard {

	private $widget_items = [];

	/**
	 * Class constructor.
	 *
	 * @return void
	 */
	public function __construct() {
		// actions
		add_action( 'admin_init', [ $this, 'init_admin_dashboard' ] );
	}

	/**
	 * Dashboard initialization.
	 *
	 * @global string $pagenow
	 *
	 * @return void
	 */
	public function init_admin_dashboard() {
		global $pagenow;

		// setup widget items
		$this->setup_widget_items();

		// do it only on dashboard page
		if ( $pagenow === 'index.php' ) {
			// filter user_can_see_stats
			if ( ! apply_filters( 'pvc_user_can_see_stats', current_user_can( 'publish_posts' ) ) )
				return;

			add_action( 'wp_dashboard_setup', [ $this, 'wp_dashboard_setup' ], 1 );
			add_action( 'admin_enqueue_scripts', [ $this, 'admin_scripts_styles' ] );
		// ajax endpoints
		} elseif ( $pagenow === 'admin-ajax.php' ) {
			add_action( 'wp_ajax_pvc_dashboard_post_most_viewed', [ $this, 'dashboard_post_most_viewed' ] );
			add_action( 'wp_ajax_pvc_dashboard_post_views_chart', [ $this, 'dashboard_post_views_chart' ] );
			add_action( 'wp_ajax_pvc_dashboard_user_options', [ $this, 'update_dashboard_user_options' ] );
		}
	}

	/**
	 * Add dashboard widget.
	 *
	 * @return void
	 */
	public function wp_dashboard_setup() {
		// add dashboard widget
		wp_add_dashboard_widget( 'pvc_dashboard', __( 'Post Views Counter', 'post-views-counter' ), [ $this, 'dashboard_widget' ] );
	}

	/**
	 * Enqueue admin scripts and styles.
	 *
	 * @return void
	 */
	public function admin_scripts_styles() {
		// get main instance
		$pvc = Post_Views_Counter();

		// styles
		wp_enqueue_style( 'pvc-admin-dashboard', POST_VIEWS_COUNTER_URL . '/css/admin-dashboard.min.css', [], $pvc->defaults['version'] );
		wp_enqueue_style( 'pvc-microtip', POST_VIEWS_COUNTER_URL . '/assets/microtip/microtip.min.css', [], '1.0.0' );

		// scripts
		wp_enqueue_script( 'pvc-admin-dashboard', POST_VIEWS_COUNTER_URL . '/js/admin-dashboard.js', [ 'jquery', 'pvc-chartjs' ], $pvc->defaults['version'], true );

		// prepare script data
		$script_data = [
			'ajaxURL'	=> admin_url( 'admin-ajax.php' ),
			'nonce'		=> wp_create_nonce( 'pvc-dashboard-widget' ),
			'nonceUser'	=> wp_create_nonce( 'pvc-dashboard-user-options' )
		];

		wp_add_inline_script( 'pvc-admin-dashboard', 'var pvcArgs = ' . wp_json_encode( $script_data ) . ";\n", 'before' );
	}

	/**
	 * Setup dashboard widget items.
	 *
	 * @return void
	 */
	private function setup_widget_items() {
		// standard items
		$items = [
			[
				'id'			=> 'post-views',
				'title'			=> __( 'Post Views', 'post-views-counter' ),
				'description'	=> __( 'Displays the chart of most viewed post types for a selected time period.', 'post-views-counter' ),
				'content'		=> '<canvas id="pvc-post-views-chart" height="' . (int) $this->calculate_canvas_size( Post_Views_Counter()->options['general']['post_types_count'] ) . '"></canvas>',
				'position'		=> 2
			],
			[
				'id'			=> 'post-most-viewed',
				'title'			=> __( 'Top Posts', 'post-views-counter' ),
				'description'	=> __( 'Displays the list of most viewed posts and pages on your website.', 'post-views-counter' ),
				'content'		=> '<div id="pvc-post-most-viewed-content" class="pvc-table-responsive"></div>',
				'position'		=> 3
			]
		];

		// filter items, do not allow to remove main items
		$new_items = apply_filters( 'pvc_dashboard_widget_items', [] );

		// any new items?
		if ( is_array( $new_items ) && ! empty( $new_items ) ) {
			foreach ( $new_items as $item ) {
				// add new item
				array_push( $items, $item );
			}
		}

		// sort dashboard items by position
		array_multisort( array_column( $items, 'position' ), SORT_ASC, SORT_NUMERIC, $items );

		// set widget items
		$this->widget_items = $items;
	}

	/**
	 * Calculate canvas height based on number of legend items.
	 *
	 * @param array $data
	 * @param bool $expression
	 * @return int
	 */
	public function calculate_canvas_size( $data, $expression = true ) {
		if ( $expression && ! empty( $data ) ) {
			// treat every 4 legend items as 1 line - 23 pixels
			$height = 23 * ( (int) ceil( count( $data ) / 4 ) - 1 );
		} else
			$height = 0;

		return (int) ( 170 + $height );
	}

	/**
	 * Render dashboard widget.
	 *
	 * @return void
	 */
	public function dashboard_widget() {
		// get user options
		$user_options = get_user_meta( get_current_user_id(), 'pvc_dashboard', true );

		// empty options?
		if ( empty( $user_options ) || ! is_array( $user_options ) )
			$user_options = [];

		// sanitize options
		$user_options = map_deep( $user_options, 'sanitize_text_field' );

		// get menu items
		$menu_items = ! empty( $user_options['menu_items'] ) ? $user_options['menu_items'] : [];

		// generate months
		$months_html = wp_kses_post( $this->generate_months( current_time( 'timestamp', false ) ) );

		// get widget items
		$items = $this->widget_items;

		$html = '
		<div id="pvc-dashboard-accordion" class="pvc-accordion">';

		foreach ( $items as $item ) {
			$html .= $this->generate_dashboard_widget_item( $item, $menu_items, $months_html );
		}

		$html .= '
		</div>';

		echo $html;
	}

	/**
	 * Generate dashboard widget item HTML.
	 *
	 * @param array $item
	 * @param array $menu_items
	 * @param string $esc_months_html
	 * @return string
	 */
	public function generate_dashboard_widget_item( $item, $menu_items, $esc_months_html ) {
		// get allowed html tags
		$allowed_html = wp_kses_allowed_html( 'post' );
		$allowed_html['canvas'] = [
			'id' => [],
			'height' => []
		];

		return '
		<div id="pvc-' . esc_attr( $item['id'] ) . '" class="pvc-accordion-item' . ( in_array( $item['id'], $menu_items, true ) ? ' pvc-collapsed' : '' ) . '">
			<div class="pvc-accordion-header">
				<div class="pvc-accordion-toggle"><span class="pvc-accordion-title">' . esc_html( $item['title'] ) . '</span><span class="pvc-tooltip" aria-label="' . esc_html( $item['description'] ) . '" data-microtip-position="top" data-microtip-size="large" role="tooltip"><span class="pvc-tooltip-icon"></span></span></div>
				<!--
				<div class="pvc-accordion-actions">
					<a href="javascript:void(0);" class="pvc-accordion-action dashicons dashicons-admin-generic"></a>
				</div>
				-->
			</div>
			<div class="pvc-accordion-content">
				<div class="pvc-dashboard-container loading">
					<div class="pvc-data-container">
						' . wp_kses( $item['content'], $allowed_html ) . '
						<span class="spinner"></span>
					</div>
					<div class="pvc-months">' . $esc_months_html . '</div>
				</div>
			</div>
		</div>';
	}

	/**
	 * Render dashboard widget with post views.
	 *
	 * @return void
	 */
	public function dashboard_post_views_chart() {
		if ( ! apply_filters( 'pvc_user_can_see_stats', current_user_can( 'publish_posts' ) ) || ! check_ajax_referer( 'pvc-dashboard-widget', 'nonce' ) )
			wp_die( __( 'You do not have permission to access this page.', 'post-views-counter' ) );

		// get period
		$period = isset( $_POST['period'] ) ? preg_replace( '/[^a-z0-9_|]/', '', $_POST['period'] ) : 'this_month';

		// get post types
		$post_types = Post_Views_Counter()->options['general']['post_types_count'];

		// get dashboard user options
		$user_options = $this->get_dashboard_user_options( get_current_user_id(), 'post_types' );

		// get current date
		$now = getdate( current_time( 'timestamp', get_option( 'gmt_offset' ) ) );

		// get colors
		$colors = Post_Views_Counter()->functions->get_colors();

		// set chart labels
		switch ( $period ) {
			case 'this_week':
//TODO
				$data = [
					'design'	=> [
						'fill'					=> true,
						'backgroundColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 0.2)',
						'borderColor'			=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'borderWidth'			=> 1.2,
						'borderDash'			=> [],
						'pointBorderColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'pointBackgroundColor'	=> 'rgba(255, 255, 255, 1)',
						'pointBorderWidth'		=> 1.2
					]
				];

				$data['data']['datasets'][0]['label'] = __( 'Post Views', 'post-views-counter' );
				$data['data']['datasets'][0]['post_type'] = '_pvc_total_views';

				for ( $day = 0; $day <= 6; $day++ ) {
					$date = strtotime( $now['mday'] . '-' . $now['mon'] . '-' . $now['year'] . ' + ' . $day . ' days - ' . $now['wday'] . ' days' );
					$query = new WP_Query(
						wp_parse_args(
							[
								'post_type'			=> $post_types,
								'posts_per_page'	=> -1,
								'paged'				=> false,
								'orderby'			=> 'post_views',
								'suppress_filters'	=> false,
								'no_found_rows'		=> true
							],
							[
								'views_query' => [
									'year'	=> date( 'Y', $date ),
									'month'	=> date( 'n', $date ),
									'day'	=> date( 'd', $date )
								]
							]
						)
					);

					$data['data']['labels'][] = date_i18n( 'j', $date );
					$data['data']['dates'][] = date_i18n( get_option( 'date_format' ), $date );
					$data['data']['datasets'][0]['data'][] = $query->total_views;
					$data['data']['datasets'][$day]['data'][] = $query->total_views;
				}
				break;

			case 'this_year':
				$data = [
					'design'	=> [
						'fill'					=> true,
						'backgroundColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 0.2)',
						'borderColor'			=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'borderWidth'			=> 1.2,
						'borderDash'			=> [],
						'pointBorderColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'pointBackgroundColor'	=> 'rgba(255, 255, 255, 1)',
						'pointBorderWidth'		=> 1.2
					]
				];

				$data['data']['datasets'][0]['label'] = __( 'Total Views', 'post-views-counter' );
				$data['data']['datasets'][0]['post_type'] = '_pvc_total_views';
				$data['data']['datasets'][0]['hidden'] = in_array( '_pvc_total_views', $user_options, true );
				$data['data']['datasets'][0]['data'] = [];

				$sum = [];

				// any post types?
				if ( ! empty( $post_types ) ) {
					// reindex post types
					$post_types = array_combine( range( 1, count( $post_types ) ), array_values( $post_types ) );

					$post_type_data = [];

					foreach ( $post_types as $id => $post_type ) {
						$post_type_obj = get_post_type_object( $post_type );

						// unrecognized post type? (mainly from deactivated plugins)
						if ( empty( $post_type_obj ) )
							$label = $post_type;
						else
							$label = $post_type_obj->labels->name;

						$data['data']['datasets'][$id]['label'] = $label;
						$data['data']['datasets'][$id]['post_type'] = $post_type;
						$data['data']['datasets'][$id]['hidden'] = in_array( $post_type, $user_options, true );
						$data['data']['datasets'][$id]['data'] = [];

						// get month views
						$post_type_data[$id] = array_values(
							pvc_get_views(
								[
									'fields'		=> 'date=>views',
									'post_type'		=> $post_type,
									'views_query'	=> [
										'year'	=> date( 'Y' ),
										'month'	=> '',
										'week'	=> '',
										'day'	=> ''
									]
								]
							)
						);
					}

					foreach ( $post_type_data as $post_type_id => $post_views ) {
						foreach ( $post_views as $id => $views ) {
							// generate chart data for specific post types
							$data['data']['datasets'][$post_type_id]['data'][] = $views;

							if ( ! array_key_exists( $id, $sum ) )
								$sum[$id] = 0;

							$sum[$id] += $views;
						}
					}
				}

				// this month all days
				for ( $i = 1; $i <= 12; $i++ ) {
					// generate chart data
					$data['data']['labels'][] = $i;
					$data['data']['dates'][] = date_i18n( 'F Y', strtotime( date( 'Y' ) . '-' . str_pad( $i, 2, '0', STR_PAD_LEFT ) . '-01' ) );
					$data['data']['datasets'][0]['data'][] = ( array_key_exists( $i - 1, $sum ) ? $sum[$i - 1] : 0 );
				}
				break;

			case 'this_month':
			default:
				// convert period
				$time = $this->period2timestamp( $period );

				// get date chunks
				$date = explode( ' ', date( "m Y t F", $time ) );

				$data = [
					'months'	=> $this->generate_months( $time ),
					'design'	=> [
						'fill'					=> true,
						'backgroundColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 0.2)',
						'borderColor'			=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'borderWidth'			=> 1.2,
						'borderDash'			=> [],
						'pointBorderColor'		=> 'rgba(' . $colors['r'] . ',' . $colors['g'] . ',' . $colors['b'] . ', 1)',
						'pointBackgroundColor'	=> 'rgba(255, 255, 255, 1)',
						'pointBorderWidth'		=> 1.2
					]
				];

				$data['data']['datasets'][0]['label'] = __( 'Total Views', 'post-views-counter' );
				$data['data']['datasets'][0]['post_type'] = '_pvc_total_views';
				$data['data']['datasets'][0]['hidden'] = in_array( '_pvc_total_views', $user_options, true );
				$data['data']['datasets'][0]['data'] = [];

				$sum = [];

				// any post types?
				if ( ! empty( $post_types ) ) {
					// reindex post types
					$post_types = array_combine( range( 1, count( $post_types ) ), array_values( $post_types ) );

					$post_type_data = [];

					foreach ( $post_types as $id => $post_type ) {
						$post_type_obj = get_post_type_object( $post_type );

						// unrecognized post type? (mainly from deactivated plugins)
						if ( empty( $post_type_obj ) )
							$label = $post_type;
						else
							$label = $post_type_obj->labels->name;

						$data['data']['datasets'][$id]['label'] = $label;
						$data['data']['datasets'][$id]['post_type'] = $post_type;
						$data['data']['datasets'][$id]['hidden'] = in_array( $post_type, $user_options, true );
						$data['data']['datasets'][$id]['data'] = [];

						// get month views
						$post_type_data[$id] = array_values(
							pvc_get_views(
								[
									'fields'		=> 'date=>views',
									'post_type'		=> $post_type,
									'views_query'	=> [
										'year'			=> $date[1],
										'month'			=> $date[0],
										'week'			=> '',
										'day'			=> '',
										'hide_empty'	=> true
									]
								]
							)
						);
					}

					foreach ( $post_type_data as $post_type_id => $post_views ) {
						foreach ( $post_views as $id => $views ) {
							// generate chart data for specific post types
							$data['data']['datasets'][$post_type_id]['data'][] = $views;

							if ( ! array_key_exists( $id, $sum ) )
								$sum[$id] = 0;

							$sum[$id] += $views;
						}
					}
				}

				// this month all days
				for ( $i = 1; $i <= $date[2]; $i++ ) {
					// generate chart data
					$data['data']['labels'][] = ( $i % 2 === 0 ? '' : $i );
					$data['data']['dates'][] = date_i18n( get_option( 'date_format' ), strtotime( $date[1] . '-' . $date[0] . '-' . str_pad( $i, 2, '0', STR_PAD_LEFT ) ) );
					$data['data']['datasets'][0]['data'][] = ( array_key_exists( $i - 1, $sum ) ? $sum[$i - 1] : 0 );
				}
				break;
		}

		echo wp_json_encode( $data );

		exit;
	}

	/**
	 * Render dashboard widget with most viewed posts.
	 *
	 * @return void
	 */
	public function dashboard_post_most_viewed() {
		if ( ! apply_filters( 'pvc_user_can_see_stats', current_user_can( 'publish_posts' ) ) || ! check_ajax_referer( 'pvc-dashboard-widget', 'nonce' ) )
			wp_die( __( 'You do not have permission to access this page.', 'post-views-counter' ) );

		// get main instance
		$pvc = Post_Views_Counter();

		// get post types
		$post_types = $pvc->options['general']['post_types_count'];

		// get period
		$period = isset( $_POST['period'] ) ? preg_replace( '/[^a-z0-9_|]/', '', $_POST['period'] ) : 'this_month';

		// convert period
		$time = $this->period2timestamp( $period );

		// get date chunks
		$date = explode( ' ', date( "m Y t F", $time ) );

		// get stats
		$query_args = [
			'post_type'			=> $post_types,
			'posts_per_page'	=> 10,
			'paged'				=> false,
			'suppress_filters'	=> false,
			'no_found_rows'		=> true,
			'views_query'		=> [
				'year'			=> $date[1],
				'month'			=> $date[0],
				'hide_empty'	=> true
			]
		];

		$posts = pvc_get_most_viewed_posts( $query_args );

		$data = [
			'months'	=> $this->generate_months( $time ),
			'html'		=> ''
		];

		$html = '
		<table id="pvc-post-most-viewed-table" class="pvc-table pvc-table-hover">
			<thead>
				<tr>
					<th scope="col">#</th>
					<th scope="col">' . esc_html__( 'Post', 'post-views-counter' ) . '</th>
					<th scope="col">' . esc_html__( 'Views', 'post-views-counter' ) . '</th>
				</tr>
			</thead>
			<tbody>';

		if ( $posts ) {
			// active post types
			$active_post_types = [];

			foreach ( $posts as $index => $post ) {
				setup_postdata( $post );

				$html .= '
				<tr>
					<th scope="col">' . ( $index + 1 ) . '</th>';

				// check post type existence
				if ( array_key_exists( $post->post_type, $active_post_types ) )
					$post_type_exists = $active_post_types[$post->post_type];
				else
					$post_type_exists = $active_post_types[$post->post_type] = post_type_exists( $post->post_type );

				$title = get_the_title( $post );

				if ( $title === '' )
					$title = __( '(no title)' );

				// edit post link
				if ( $post_type_exists && current_user_can( 'edit_post', $post->ID ) ) {
					$html .= '
					<td><a href="' . esc_url( get_edit_post_link( $post->ID ) ) . '">' . esc_html( $title ) . '</a></td>';
				} else {
					$html .= '
					<td>' . esc_html( $title ). '</td>';
				}

				$html .= '
					<td>' . number_format_i18n( $post->post_views ) . '</td>
				</tr>';
			}
		} else {
			$html .= '
				<tr class="no-posts">
					<td colspan="3">' . esc_html__( 'No most viewed posts found.', 'post-views-counter' ) . '</td>
				</tr>';
		}

		$html .= '
			</tbody>
		</table>';

		$data['html'] = $html;

		echo wp_json_encode( $data );

		exit;
	}

	/**
	 * Generate dashboard widget months HTML.
	 *
	 * @param int $timestamp
	 * @return string
	 */
	public function generate_months( $timestamp ) {
		$dates = [
			explode( ' ', date( "m F Y", strtotime( "-1 months", $timestamp ) ) ),
			explode( ' ', date( "m F Y", $timestamp ) ),
			explode( ' ', date( "m F Y", strtotime( "+1 months", $timestamp ) ) )
		];

		$current = date( "Ym", current_time( 'timestamp', false ) );

		if ( (int) $current <= (int) ( $dates[1][2] . $dates[1][0] ) )
			$next = '<span class="next">' . $dates[2][1] . ' ' . $dates[2][2] . ' ›</span>';
		else
			$next = '<a class="next" href="#" data-date="' . ( $dates[2][0] . '|' . $dates[2][2] ) . '">' . $dates[2][1] . ' ' . $dates[2][2] . ' ›</a>';

		$dates = [
			'prev'		=> '<a class="prev" href="#" data-date="' . ( $dates[0][0] . '|' . $dates[0][2] ) . '">‹ ' . $dates[0][1] . ' ' . $dates[0][2] . '</a>',
			'current'	=> '<span class="current">' . $dates[1][1] . ' ' . $dates[1][2] . '</span>',
			'next'		=> $next
		];

		return $dates['prev'] . $dates['current'] . $dates['next'];
	}

	/**
	 * Update dashboard widget user options.
	 *
	 * @return void
	 */
	public function update_dashboard_user_options() {
		if ( ! check_ajax_referer( 'pvc-dashboard-user-options', 'nonce' ) )
			wp_die( __( 'You do not have permission to access this page.', 'post-views-counter' ) );

		// valid data?
		if ( isset( $_POST['nonce'], $_POST['options'] ) && ! empty( $_POST['options'] ) ) {
			// get sanitized options
			$update = map_deep( $_POST['options'], 'sanitize_text_field' );

			// get user ID
			$user_id = get_current_user_id();

			// get user dashboard data
			$user_options = get_user_meta( $user_id, 'pvc_dashboard', true );

			// empty userdata?
			if ( ! is_array( $user_options ) || empty( $user_options ) )
				$user_options = [];

			// empty post types?
			if ( ! array_key_exists( 'post_types', $user_options ) || ! is_array( $user_options['post_types'] ) )
				$user_options['post_types'] = [];

			// hide post type?
			if ( ! empty( $update['post_type'] ) ) {
				// get allowed post types
				$allowed_post_types = Post_Views_Counter()->options['general']['post_types_count'];

				// simulate total post views as post type
				$allowed_post_types[] = '_pvc_total_views';

				if ( in_array( $update['post_type'], $allowed_post_types, true ) ) {
					if ( isset( $update['hidden'] ) && $update['hidden'] === 'true' ) {
						if ( ! in_array( $update['post_type'], $user_options['post_types'], true ) )
							$user_options['post_types'][] = $update['post_type'];
					} else {
						if ( ( $key = array_search( $update['post_type'], $user_options['post_types'] ) ) !== false )
							unset( $user_options['post_types'][$key] );
					}
				}
			}

			// empty menu items?
			if ( ! array_key_exists( 'menu_items', $user_options ) || ! is_array( $user_options['menu_items'] ) )
				$user_options['menu_items'] = [];

			if ( ! empty( $update['menu_items'] ) && is_array( $update['menu_items'] ) ) {
				$user_options['menu_items'] = [];

				// get allowed menu items
				$allowed_menu_items = array_column( $this->widget_items, 'id' );

				foreach ( $update['menu_items'] as $menu_item => $hidden ) {
					if ( in_array( $menu_item, $allowed_menu_items, true ) && $hidden === 'true' )
						$user_options['menu_items'][] = $menu_item;
				}
			}

			// filter user options
			$user_options = apply_filters( 'pvc_update_dashboard_user_options', $user_options, $update, $user_id );

			// update userdata
			update_user_meta( $user_id, 'pvc_dashboard', $user_options );
		}

		exit;
	}

	/**
	 * Get user dashboard data.
	 *
	 * @param int $user_id
	 * @param string $data_type
	 * @return array
	 */
	public function get_dashboard_user_options( $user_id, $data_type ) {
		$user_options = get_user_meta( $user_id, 'pvc_dashboard', true );

		if ( ! is_array( $user_options ) || empty( $user_options ) )
			$user_options = [];

		if ( ! array_key_exists( $data_type, $user_options ) || ! is_array( $user_options[$data_type] ) )
			$user_options[$data_type] = [];

		return $user_options[$data_type];
	}

	/**
	 * Convert period to timestamp.
	 *
	 * @param string $period
	 * @return int
	 */
	public function period2timestamp( $period ) {
		// whitelisted period?
		if ( in_array( $period, [ 'this_week', 'this_year', 'this_month' ], true ) ) {
			$timestamp = current_time( 'timestamp', false );
		} else {
			if ( preg_match( '/^([0-9]{2}\|[0-9]{4})$/', $period ) === 1 ) {
				// month|year
				$date = explode( '|', $period, 2 );

				// get timestamp
				$timestamp = strtotime( (string) $date[1] . '-' . (string) $date[0] . '-13' );
			} else
				$timestamp = current_time( 'timestamp', false );
		}

		return $timestamp;
	}
}
