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<?php
/**
* Set event month filter at Event post type admin column
*/
add_filter( 'query_vars', 'goto_calendar_register_query_vars' );
function goto_calendar_register_query_vars( $qvars ) {
//Add these query variables
$qvars[] = 'custom_month';
return $qvars;
}
/**
* Add event_date to admin column.
*/
// add event date field admin column
add_filter( 'manage_event_posts_columns', 'add_event_date_admin_columns_head' );
function add_event_date_admin_columns_head( $defaults ) {
// Remove default post date column
unset($defaults['date']);
$defaults[ 'event_date' ] = 'Event Day';
return $defaults;
}
add_action( 'manage_event_posts_custom_column', 'add_event_date_admin_column_content', 10, 2 );
function add_event_date_admin_column_content( $column_name, $post_id ) {
global $post;
if ( $column_name == 'event_date' ) {
$event_date = get_post_meta( $post_id, 'event_date', true );
if( ! empty( $event_date ) ) {
echo date( 'Y/m/d', strtotime( $event_date ) );
} else {
echo '';
}
}
}
/**
* Remove date filter at Event post type admin column.
*/
add_filter( 'disable_months_dropdown' , 'custom_disable_months_dropdown' , 10 , 2 );
function custom_disable_months_dropdown( $false , $post_type ) {
$disable_months_dropdown = $false;
$disable_post_types = array( 'event' );
if( in_array( $post_type , $disable_post_types ) ) {
$disable_months_dropdown = true;
}
return $disable_months_dropdown;
}
/**
* Add post meta date filter to even post type.
*/
add_action( 'restrict_manage_posts', 'goto_calendar_restrict_posts_by_metavalue' );
function goto_calendar_restrict_posts_by_metavalue() {
global $typenow;
$months = goto_calendar_get_months();
if ($typenow == 'event') {
$selected = get_query_var('custom_month');
$output = '<select name="custom_month" class="postform">' . "\n";
$output .= '<option ' . selected( $selected, 0, false ).' value="">' . __( 'Show All', 'some_textdomain' ) . '</option>';
if ( ! empty( $months ) ) {
foreach ( $months as $month ) {
$value = esc_attr( $month->year . '/' . $month->month );
$month_dt = new DateTime( $month->year . '-' . $month->month . '-01' );
$output .= '<option value="' . $value . '"' . selected( $selected, $value, false ) . '>' . $month_dt->format( 'Y年m月' ) . '</option>';
}
}
$output .= '</select>' . "\n";
echo $output;
}
}
add_action( 'pre_get_posts', 'goto_calendar_pre_get_posts' );
function goto_calendar_pre_get_posts( $query ) {
//Only alter query if custom variable is set.
$month_str = $query->get( 'custom_month' );
if( !empty( $month_str ) ){
$meta_query = $query->get( 'meta_query' );
if( empty( $meta_query ) )
$meta_query = array();
$month = new DateTime($month_str.'/01');
$meta_query[] = array(
'key' => 'event_date',
'value' => array( $month->format( 'Ymd' ), $month->format( 'Ymt' ) ),
'compare' => 'BETWEEN',
);
$query->set( 'meta_query', $meta_query );
}
}
function goto_calendar_get_months(){
global $wpdb;
$months = wp_cache_get( 'goto_calendar_get_months' );
if ( false === $months ) {
$query = "SELECT YEAR( meta_value ) AS `year`, MONTH( meta_value ) AS `month`, count( post_id ) as posts
FROM $wpdb->postmeta
WHERE meta_key = 'event_date'
AND post_id IN ( SELECT ID FROM $wpdb->posts
WHERE post_type = 'event'
AND post_status != 'trash' )
GROUP BY YEAR( meta_value ), MONTH( meta_value ) ORDER BY meta_value DESC";
$months = $wpdb->get_results($query);
wp_cache_set( 'goto_calendar_get_months', $months );
}
return $months;
}
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