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<?php
/**
* @package Polylang
*/
if ( ! class_exists( 'WP_Widget_Calendar' ) ) {
require_once ABSPATH . '/wp-includes/default-widgets.php';
}
/**
* This classes rewrite the whole Calendar widget functionality as there is no filter on sql queries and only a filter on final output.
* Code last checked: WP 5.5.
*
* A request to add filters on sql queries exists: http://core.trac.wordpress.org/ticket/15202.
* Method used in 0.4.x: use of the get_calendar filter and overwrite the output of get_calendar function -> not very efficient (add 4 to 5 sql queries).
* Method used since 0.5: remove the WP widget and replace it by our own -> our language filter will not work if get_calendar is called directly by a theme.
*
* @since 0.5
*/
class PLL_Widget_Calendar extends WP_Widget_Calendar {
protected static $pll_instance = 0; // Can't use $instance of WP_Widget_Calendar as it's private :/.
/**
* Outputs the content for the current Calendar widget instance.
* Modified version of the parent function to call our own get_calendar() method.
*
* @since 0.5
*
* @param array $args Display arguments including 'before_title', 'after_title',
* 'before_widget', and 'after_widget'.
* @param array $instance The settings for the particular instance of the widget.
*/
public function widget( $args, $instance ) {
$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
echo $args['before_widget'];
if ( $title ) {
echo $args['before_title'] . $title . $args['after_title'];
}
if ( 0 === self::$pll_instance ) { #modified#
echo '<div id="calendar_wrap" class="calendar_wrap">';
} else {
echo '<div class="calendar_wrap">';
}
empty( PLL()->curlang ) ? get_calendar() : self::get_calendar(); #modified#
echo '</div>';
echo $args['after_widget'];
self::$pll_instance++; #modified#
}
/**
* Modified version of the WP get_calendar() function to filter the queries.
*
* @since 0.5
*
* @param bool $initial Optional, default is true. Use initial calendar names.
* @param bool $echo Optional, default is true. Set to false for return.
* @return void|string Void if `$echo` argument is true, calendar HTML if `$echo` is false.
*/
static public function get_calendar( $initial = true, $echo = true ) {
global $wpdb, $m, $monthnum, $year, $wp_locale, $posts;
$join_clause = PLL()->model->post->join_clause(); #added#
$where_clause = PLL()->model->post->where_clause( PLL()->curlang ); #added#
$key = md5( PLL()->curlang->slug . $m . $monthnum . $year ); #modified#
$cache = wp_cache_get( 'get_calendar', 'calendar' );
if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) {
/** This filter is documented in wp-includes/general-template.php */
$output = apply_filters( 'get_calendar', $cache[ $key ] );
if ( $echo ) {
echo $output;
return;
}
return $output;
}
if ( ! is_array( $cache ) ) {
$cache = array();
}
// Quick check. If we have no posts at all, abort!
if ( ! $posts ) {
$gotsome = $wpdb->get_var( "SELECT 1 as test FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" );
if ( ! $gotsome ) {
$cache[ $key ] = '';
wp_cache_set( 'get_calendar', $cache, 'calendar' );
return;
}
}
if ( isset( $_GET['w'] ) ) {
$w = (int) $_GET['w'];
}
// week_begins = 0 stands for Sunday.
$week_begins = (int) get_option( 'start_of_week' );
// Let's figure out when we are.
if ( ! empty( $monthnum ) && ! empty( $year ) ) {
$thismonth = zeroise( (int) $monthnum, 2 );
$thisyear = (int) $year;
} elseif ( ! empty( $w ) ) {
// We need to get the month from MySQL.
$thisyear = (int) substr( $m, 0, 4 );
// It seems MySQL's weeks disagree with PHP's.
$d = ( ( $w - 1 ) * 7 ) + 6;
$thismonth = $wpdb->get_var( "SELECT DATE_FORMAT((DATE_ADD('{$thisyear}0101', INTERVAL $d DAY) ), '%m')" );
} elseif ( ! empty( $m ) ) {
$thisyear = (int) substr( $m, 0, 4 );
if ( strlen( $m ) < 6 ) {
$thismonth = '01';
} else {
$thismonth = zeroise( (int) substr( $m, 4, 2 ), 2 );
}
} else {
$thisyear = current_time( 'Y' );
$thismonth = current_time( 'm' );
}
$unixmonth = mktime( 0, 0, 0, $thismonth, 1, $thisyear );
$last_day = gmdate( 't', $unixmonth );
// Get the next and previous month and year with at least one post.
$previous = $wpdb->get_row(
"SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
FROM $wpdb->posts $join_clause
WHERE post_date < '$thisyear-$thismonth-01'
AND post_type = 'post' AND post_status = 'publish' $where_clause
ORDER BY post_date DESC
LIMIT 1"
); #modified#
$next = $wpdb->get_row(
"SELECT MONTH(post_date) AS month, YEAR(post_date) AS year
FROM $wpdb->posts $join_clause
WHERE post_date > '$thisyear-$thismonth-{$last_day} 23:59:59'
AND post_type = 'post' AND post_status = 'publish' $where_clause
ORDER BY post_date ASC
LIMIT 1"
); #modified#
/* translators: Calendar caption: 1: Month name, 2: 4-digit year. */
$calendar_caption = _x( '%1$s %2$s', 'calendar caption' );
$calendar_output = '<table id="wp-calendar" class="wp-calendar-table">
<caption>' . sprintf(
$calendar_caption,
$wp_locale->get_month( $thismonth ),
gmdate( 'Y', $unixmonth )
) . '</caption>
<thead>
<tr>';
$myweek = array();
for ( $wdcount = 0; $wdcount <= 6; $wdcount++ ) {
$myweek[] = $wp_locale->get_weekday( ( $wdcount + $week_begins ) % 7 );
}
foreach ( $myweek as $wd ) {
$day_name = $initial ? $wp_locale->get_weekday_initial( $wd ) : $wp_locale->get_weekday_abbrev( $wd );
$wd = esc_attr( $wd );
$calendar_output .= "\n\t\t<th scope=\"col\" title=\"$wd\">$day_name</th>";
}
$calendar_output .= '
</tr>
</thead>
<tbody>
<tr>';
$daywithpost = array();
// Get days with posts.
$dayswithposts = $wpdb->get_results(
"SELECT DISTINCT DAYOFMONTH(post_date)
FROM $wpdb->posts $join_clause WHERE post_date >= '{$thisyear}-{$thismonth}-01 00:00:00'
AND post_type = 'post' AND post_status = 'publish'
AND post_date <= '{$thisyear}-{$thismonth}-{$last_day} 23:59:59' $where_clause",
ARRAY_N
); #modified#
if ( $dayswithposts ) {
foreach ( (array) $dayswithposts as $daywith ) {
$daywithpost[] = (int) $daywith[0];
}
}
// See how much we should pad in the beginning.
$pad = calendar_week_mod( gmdate( 'w', $unixmonth ) - $week_begins );
if ( 0 != $pad ) {
$calendar_output .= "\n\t\t" . '<td colspan="' . esc_attr( $pad ) . '" class="pad"> </td>';
}
$newrow = false;
$daysinmonth = (int) gmdate( 't', $unixmonth );
for ( $day = 1; $day <= $daysinmonth; ++$day ) {
if ( isset( $newrow ) && $newrow ) {
$calendar_output .= "\n\t</tr>\n\t<tr>\n\t\t";
}
$newrow = false;
if ( current_time( 'j' ) == $day &&
current_time( 'm' ) == $thismonth &&
current_time( 'Y' ) == $thisyear ) {
$calendar_output .= '<td id="today">';
} else {
$calendar_output .= '<td>';
}
if ( in_array( $day, $daywithpost, true ) ) {
// Any posts today?
$date_format = gmdate( _x( 'F j, Y', 'daily archives date format' ), strtotime( "{$thisyear}-{$thismonth}-{$day}" ) );
/* translators: Post calendar label. %s: Date. */
$label = sprintf( __( 'Posts published on %s' ), $date_format );
$calendar_output .= sprintf(
'<a href="%s" aria-label="%s">%s</a>',
get_day_link( $thisyear, $thismonth, $day ),
esc_attr( $label ),
$day
);
} else {
$calendar_output .= $day;
}
$calendar_output .= '</td>';
if ( 6 == calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins ) ) {
$newrow = true;
}
}
$pad = 7 - calendar_week_mod( gmdate( 'w', mktime( 0, 0, 0, $thismonth, $day, $thisyear ) ) - $week_begins );
if ( 0 != $pad && 7 != $pad ) {
$calendar_output .= "\n\t\t" . '<td class="pad" colspan="' . esc_attr( $pad ) . '"> </td>';
}
$calendar_output .= "\n\t</tr>\n\t</tbody>";
$calendar_output .= "\n\t</table>";
$calendar_output .= '<nav aria-label="' . __( 'Previous and next months' ) . '" class="wp-calendar-nav">';
if ( $previous ) {
$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev"><a href="' . get_month_link( $previous->year, $previous->month ) . '">« ' .
$wp_locale->get_month_abbrev( $wp_locale->get_month( $previous->month ) ) .
'</a></span>';
} else {
$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-prev"> </span>';
}
$calendar_output .= "\n\t\t" . '<span class="pad"> </span>';
if ( $next ) {
$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next"><a href="' . get_month_link( $next->year, $next->month ) . '">' .
$wp_locale->get_month_abbrev( $wp_locale->get_month( $next->month ) ) .
' »</a></span>';
} else {
$calendar_output .= "\n\t\t" . '<span class="wp-calendar-nav-next"> </span>';
}
$calendar_output .= '
</nav>';
$cache[ $key ] = $calendar_output;
wp_cache_set( 'get_calendar', $cache, 'calendar' );
if ( $echo ) {
/** This filter is documented in wp-includes/general-template.php */
echo apply_filters( 'get_calendar', $calendar_output );
return;
}
/** This filter is documented in wp-includes/general-template.php */
return apply_filters( 'get_calendar', $calendar_output );
}
}
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