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<?php
/*
* ACF Page Link Field Class
*
* All the logic for this field type
*
* @class acf_field_page_link
* @extends acf_field
* @package ACF
* @subpackage Fields
*/
if( ! class_exists('acf_field_page_link') ) :
class acf_field_page_link extends acf_field {
/*
* __construct
*
* This function will setup the field type data
*
* @type function
* @date 5/03/2014
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function __construct() {
// vars
$this->name = 'page_link';
$this->label = __("Page Link",'acf');
$this->category = 'relational';
$this->defaults = array(
'post_type' => array(),
'taxonomy' => array(),
'allow_null' => 0,
'multiple' => 0,
);
// extra
add_action('wp_ajax_acf/fields/page_link/query', array($this, 'ajax_query'));
add_action('wp_ajax_nopriv_acf/fields/page_link/query', array($this, 'ajax_query'));
// do not delete!
parent::__construct();
}
/*
* get_choices
*
* This function will return an array of data formatted for use in a select2 AJAX response
*
* @type function
* @date 15/10/2014
* @since 5.0.9
*
* @param $options (array)
* @return (array)
*/
function get_choices( $options = array() ) {
// defaults
$options = acf_parse_args($options, array(
'post_id' => 0,
's' => '',
'lang' => false,
'field_key' => '',
'paged' => 1
));
// vars
$r = array();
$args = array();
// paged
$args['posts_per_page'] = 20;
$args['paged'] = $options['paged'];
// load field
$field = acf_get_field( $options['field_key'] );
if( !$field ) return false;
// update $args
if( !empty($field['post_type']) ) {
$args['post_type'] = acf_get_array( $field['post_type'] );
} else {
$args['post_type'] = acf_get_post_types();
}
// create tax queries
if( !empty($field['taxonomy']) ) {
// append to $args
$args['tax_query'] = array();
// decode terms
$taxonomies = acf_decode_taxonomy_terms( $field['taxonomy'] );
// now create the tax queries
foreach( $taxonomies as $taxonomy => $terms ) {
$args['tax_query'][] = array(
'taxonomy' => $taxonomy,
'field' => 'slug',
'terms' => $terms,
);
}
}
// search
if( $options['s'] ) {
$args['s'] = $options['s'];
}
// filters
$args = apply_filters('acf/fields/page_link/query', $args, $field, $options['post_id']);
$args = apply_filters('acf/fields/page_link/query/name=' . $field['name'], $args, $field, $options['post_id'] );
$args = apply_filters('acf/fields/page_link/query/key=' . $field['key'], $args, $field, $options['post_id'] );
// is search
$is_search = !empty( $args['s'] );
// add archives to $r
if( $args['paged'] == 1 ) {
$archives = array();
$archives[] = array(
'id' => home_url(),
'text' => home_url()
);
foreach( $args['post_type'] as $post_type ) {
$archive_link = get_post_type_archive_link( $post_type );
if( $archive_link ) {
$archives[] = array(
'id' => $archive_link,
'text' => $archive_link
);
}
}
// search
if( $is_search ) {
foreach( array_keys($archives) as $i ) {
if( strpos( $archives[$i]['text'], $args['s'] ) === false ) {
unset($archives[$i]);
}
}
$archives = array_values($archives);
}
if( !empty($archives) ) {
$r[] = array(
'text' => __('Archives', 'acf'),
'children' => $archives
);
}
}
// get posts grouped by post type
$groups = acf_get_grouped_posts( $args );
if( !empty($groups) ) {
foreach( array_keys($groups) as $group_title ) {
// vars
$posts = acf_extract_var( $groups, $group_title );
$titles = array();
// data
$data = array(
'text' => $group_title,
'children' => array()
);
foreach( array_keys($posts) as $post_id ) {
// override data
$posts[ $post_id ] = $this->get_post_title( $posts[ $post_id ], $field, $options['post_id'] );
};
// order by search
if( $is_search ) {
$posts = acf_order_by_search( $posts, $args['s'] );
}
// append to $data
foreach( array_keys($posts) as $post_id ) {
$data['children'][] = array(
'id' => $post_id,
'text' => $posts[ $post_id ]
);
}
// append to $r
$r[] = $data;
}
}
// return
return $r;
}
/*
* ajax_query
*
* description
*
* @type function
* @date 24/10/13
* @since 5.0.0
*
* @param $post_id (int)
* @return $post_id (int)
*/
function ajax_query() {
// validate
if( !acf_verify_ajax() ) {
die();
}
// get choices
$choices = $this->get_choices( $_POST );
// validate
if( !$choices ) {
die();
}
// return JSON
echo json_encode( $choices );
die();
}
/*
* get_post_title
*
* This function returns the HTML for a result
*
* @type function
* @date 1/11/2013
* @since 5.0.0
*
* @param $post (object)
* @param $field (array)
* @param $post_id (int) the post_id to which this value is saved to
* @return (string)
*/
function get_post_title( $post, $field, $post_id = 0, $is_search = 0 ) {
// get post_id
if( !$post_id ) $post_id = acf_get_form_data('post_id');
// vars
$title = acf_get_post_title( $post, $is_search );
// filters
$title = apply_filters('acf/fields/page_link/result', $title, $post, $field, $post_id);
$title = apply_filters('acf/fields/page_link/result/name=' . $field['_name'], $title, $post, $field, $post_id);
$title = apply_filters('acf/fields/page_link/result/key=' . $field['key'], $title, $post, $field, $post_id);
// return
return $title;
}
/*
* get_posts
*
* This function will return an array of posts for a given field value
*
* @type function
* @date 13/06/2014
* @since 5.0.0
*
* @param $value (array)
* @return $value
*/
function get_posts( $value, $field ) {
// force value to array
$value = acf_get_array( $value );
// get selected post ID's
$post__in = array();
foreach( $value as $k => $v ) {
if( is_numeric($v) ) {
// append to $post__in
$post__in[] = (int) $v;
}
}
// bail early if no posts
if( empty($post__in) ) {
return $value;
}
// get posts
$posts = acf_get_posts(array(
'post__in' => $post__in,
'post_type' => $field['post_type']
));
// override value with post
$return = array();
// append to $return
foreach( $value as $k => $v ) {
if( is_numeric($v) ) {
// extract first post
$post = array_shift( $posts );
// append
if( $post ) {
$return[] = $post;
}
} else {
$return[] = $v;
}
}
// return
return $return;
}
/*
* render_field()
*
* Create the HTML interface for your field
*
* @param $field - an array holding all the field's data
*
* @type action
* @since 3.6
* @date 23/01/13
*/
function render_field( $field ){
// Change Field into a select
$field['type'] = 'select';
$field['ui'] = 1;
$field['ajax'] = 1;
$field['choices'] = array();
// populate choices if value exists
if( !empty($field['value']) ) {
// get posts
$posts = $this->get_posts( $field['value'], $field );
// set choices
if( !empty($posts) ) {
foreach( array_keys($posts) as $i ) {
// vars
$post = acf_extract_var( $posts, $i );
if( is_object($post) ) {
// append to choices
$field['choices'][ $post->ID ] = $this->get_post_title( $post, $field );
} else {
// append to choices
$field['choices'][ $post ] = $post;
}
}
}
}
// render
acf_render_field( $field );
}
/*
* render_field_settings()
*
* Create extra options for your field. This is rendered when editing a field.
* The value of $field['name'] can be used (like bellow) to save extra data to the $field
*
* @type action
* @since 3.6
* @date 23/01/13
*
* @param $field - an array holding all the field's data
*/
function render_field_settings( $field ) {
// post_type
acf_render_field_setting( $field, array(
'label' => __('Filter by Post Type','acf'),
'instructions' => '',
'type' => 'select',
'name' => 'post_type',
'choices' => acf_get_pretty_post_types(),
'multiple' => 1,
'ui' => 1,
'allow_null' => 1,
'placeholder' => __("All post types",'acf'),
));
// taxonomy
acf_render_field_setting( $field, array(
'label' => __('Filter by Taxonomy','acf'),
'instructions' => '',
'type' => 'select',
'name' => 'taxonomy',
'choices' => acf_get_taxonomy_terms(),
'multiple' => 1,
'ui' => 1,
'allow_null' => 1,
'placeholder' => __("All taxonomies",'acf'),
));
// allow_null
acf_render_field_setting( $field, array(
'label' => __('Allow Null?','acf'),
'instructions' => '',
'type' => 'radio',
'name' => 'allow_null',
'choices' => array(
1 => __("Yes",'acf'),
0 => __("No",'acf'),
),
'layout' => 'horizontal',
));
// multiple
acf_render_field_setting( $field, array(
'label' => __('Select multiple values?','acf'),
'instructions' => '',
'type' => 'radio',
'name' => 'multiple',
'choices' => array(
1 => __("Yes",'acf'),
0 => __("No",'acf'),
),
'layout' => 'horizontal',
));
}
/*
* format_value()
*
* This filter is appied to the $value after it is loaded from the db and before it is returned to the template
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $value (mixed) the value which was loaded from the database
* @param $post_id (mixed) the $post_id from which the value was loaded
* @param $field (array) the field array holding all the field options
*
* @return $value (mixed) the modified value
*/
function format_value( $value, $post_id, $field ) {
// ACF4 null
if( $value === 'null' ) {
return false;
}
// bail early if no value
if( empty($value) ) {
return $value;
}
// get posts
$value = $this->get_posts( $value, $field );
// set choices
foreach( array_keys($value) as $i ) {
// vars
$post = acf_extract_var( $value, $i );
// convert $post to permalink
if( is_object($post) ) {
$post = get_permalink( $post );
}
// append back to $value
$value[ $i ] = $post;
}
// convert back from array if neccessary
if( !$field['multiple'] ) {
$value = array_shift($value);
}
// return value
return $value;
}
/*
* update_value()
*
* This filter is appied to the $value before it is updated in the db
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $value - the value which will be saved in the database
* @param $post_id - the $post_id of which the value will be saved
* @param $field - the field array holding all the field options
*
* @return $value - the modified value
*/
function update_value( $value, $post_id, $field ) {
// validate
if( empty($value) ) {
return $value;
}
// format
if( is_array($value) ) {
// array
foreach( $value as $k => $v ){
// object?
if( is_object($v) && isset($v->ID) )
{
$value[ $k ] = $v->ID;
}
}
// save value as strings, so we can clearly search for them in SQL LIKE statements
$value = array_map('strval', $value);
} elseif( is_object($value) && isset($value->ID) ) {
// object
$value = $value->ID;
}
// return
return $value;
}
}
new acf_field_page_link();
endif;
?>