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<?php
/*
* ACF Select Field Class
*
* All the logic for this field type
*
* @class acf_field_select
* @extends acf_field
* @package ACF
* @subpackage Fields
*/
if( ! class_exists('acf_field_select') ) :
class acf_field_select 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 = 'select';
$this->label = __("Select",'acf');
$this->category = 'choice';
$this->defaults = array(
'multiple' => 0,
'allow_null' => 0,
'choices' => array(),
'default_value' => '',
'ui' => 0,
'ajax' => 0,
'placeholder' => '',
'disabled' => 0,
'readonly' => 0,
);
$this->l10n = array(
'matches_1' => _x('One result is available, press enter to select it.', 'Select2 JS matches_1', 'acf'),
'matches_n' => _x('%d results are available, use up and down arrow keys to navigate.', 'Select2 JS matches_n', 'acf'),
'matches_0' => _x('No matches found', 'Select2 JS matches_0', 'acf'),
'input_too_short_1' => _x('Please enter 1 or more characters', 'Select2 JS input_too_short_1', 'acf' ),
'input_too_short_n' => _x('Please enter %d or more characters', 'Select2 JS input_too_short_n', 'acf' ),
'input_too_long_1' => _x('Please delete 1 character', 'Select2 JS input_too_long_1', 'acf' ),
'input_too_long_n' => _x('Please delete %d characters', 'Select2 JS input_too_long_n', 'acf' ),
'selection_too_long_1' => _x('You can only select 1 item', 'Select2 JS selection_too_long_1', 'acf' ),
'selection_too_long_n' => _x('You can only select %d items', 'Select2 JS selection_too_long_n', 'acf' ),
'load_more' => _x('Loading more results…', 'Select2 JS load_more', 'acf' ),
'searching' => _x('Searching…', 'Select2 JS searching', 'acf' ),
'load_fail' => _x('Loading failed', 'Select2 JS load_fail', 'acf' ),
);
// ajax
add_action('wp_ajax_acf/fields/select/query', array($this, 'ajax_query'));
add_action('wp_ajax_nopriv_acf/fields/select/query', array($this, 'ajax_query'));
// do not delete!
parent::__construct();
}
/*
* input_admin_enqueue_scripts
*
* description
*
* @type function
* @date 16/12/2015
* @since 5.3.2
*
* @param $post_id (int)
* @return $post_id (int)
*/
function input_admin_enqueue_scripts() {
// globals
global $wp_scripts, $wp_styles;
// vars
$version = '3.5.2';
$min = defined('SCRIPT_DEBUG') && SCRIPT_DEBUG ? '' : '.min';
// script
wp_enqueue_script('select2', acf_get_dir("assets/inc/select2/select2{$min}.js"), array('jquery'), $version );
// style
wp_enqueue_style('select2', acf_get_dir('assets/inc/select2/select2.css'), '', $version );
// v4
//wp_enqueue_script('select2', acf_get_dir("assets/inc/select2/dist/js/select2.full.js"), array('jquery'), '4.0', true );
//wp_enqueue_style('select2', acf_get_dir("assets/inc/select2/dist/css/select2{$min}.css"), '', '4.0' );
}
/*
* query_posts
*
* description
*
* @type function
* @date 24/10/13
* @since 5.0.0
*
* @param n/a
* @return n/a
*/
function ajax_query() {
// options
$options = acf_parse_args( $_POST, array(
'post_id' => 0,
's' => '',
'field_key' => '',
'nonce' => '',
));
// load field
$field = acf_get_field( $options['field_key'] );
if( !$field ) {
die();
}
// vars
$r = array();
$s = false;
// search
if( $options['s'] !== '' ) {
// search may be integer
$s = strval($options['s']);
// strip slashes
$s = wp_unslash($s);
}
// loop through choices
if( !empty($field['choices']) ) {
foreach( $field['choices'] as $k => $v ) {
// if searching, but doesn't exist
if( $s !== false && stripos($v, $s) === false ) {
continue;
}
// append
$r[] = array(
'id' => $k,
'text' => strval( $v )
);
}
}
// return JSON
echo json_encode( $r );
die();
}
/*
* 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 ) {
// convert
$field['value'] = acf_get_array($field['value'], false);
$field['choices'] = acf_get_array($field['choices']);
// placeholder
if( empty($field['placeholder']) ) {
$field['placeholder'] = __("Select",'acf');
}
// add empty value (allows '' to be selected)
if( !count($field['value']) ) {
$field['value'][''] = '';
}
// null
if( $field['allow_null'] && !$field['multiple'] ) {
$prepend = array('' => '- ' . $field['placeholder'] . ' -');
$field['choices'] = $prepend + $field['choices'];
}
// vars
$atts = array(
'id' => $field['id'],
'class' => $field['class'],
'name' => $field['name'],
'data-ui' => $field['ui'],
'data-ajax' => $field['ajax'],
'data-multiple' => $field['multiple'],
'data-placeholder' => $field['placeholder'],
'data-allow_null' => $field['allow_null']
);
// multiple
if( $field['multiple'] ) {
$atts['multiple'] = 'multiple';
$atts['size'] = 5;
$atts['name'] .= '[]';
}
// special atts
foreach( array( 'readonly', 'disabled' ) as $k ) {
if( !empty($field[ $k ]) ) $atts[ $k ] = $k;
}
// custom ajax action
if( !empty($field['ajax_action']) ) {
$atts['data-ajax_action'] = $field['ajax_action'];
}
// hidden input
if( $field['ui'] ) {
$v = $field['value'];
if( $field['multiple'] ) {
$v = implode('||', $v);
} else {
$v = acf_maybe_get($v, 0, '');
}
acf_hidden_input(array(
'id' => $field['id'] . '-input',
'name' => $field['name'],
'value' => $v
));
} elseif( $field['multiple'] ) {
acf_hidden_input(array(
'id' => $field['id'] . '-input',
'name' => $field['name']
));
}
// open
echo '<select ' . acf_esc_attr($atts) . '>';
// walk
$this->walk( $field['choices'], $field['value'] );
// close
echo '</select>';
}
/*
* walk
*
* description
*
* @type function
* @date 22/12/2015
* @since 5.3.2
*
* @param $post_id (int)
* @return $post_id (int)
*/
function walk( $choices, $values ) {
// bail ealry if no choices
if( empty($choices) ) return;
// loop
foreach( $choices as $k => $v ) {
// optgroup
if( is_array($v) ){
// optgroup
echo '<optgroup label="' . esc_attr($k) . '">';
// walk
$this->walk( $v, $values );
// close optgroup
echo '</optgroup>';
// break
continue;
}
// vars
$search = html_entity_decode($k);
$pos = array_search($search, $values);
$atts = array( 'value' => $k );
// validate selected
if( $pos !== false ) {
$atts['selected'] = 'selected';
$atts['data-i'] = $pos;
}
// option
echo '<option ' . acf_esc_attr($atts) . '>' . $v . '</option>';
}
}
/*
* 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 ) {
// encode choices (convert from array)
$field['choices'] = acf_encode_choices($field['choices']);
$field['default_value'] = acf_encode_choices($field['default_value'], false);
// choices
acf_render_field_setting( $field, array(
'label' => __('Choices','acf'),
'instructions' => __('Enter each choice on a new line.','acf') . '<br /><br />' . __('For more control, you may specify both a value and label like this:','acf'). '<br /><br />' . __('red : Red','acf'),
'type' => 'textarea',
'name' => 'choices',
));
// default_value
acf_render_field_setting( $field, array(
'label' => __('Default Value','acf'),
'instructions' => __('Enter each default value on a new line','acf'),
'type' => 'textarea',
'name' => 'default_value',
));
// 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',
));
// ui
acf_render_field_setting( $field, array(
'label' => __('Stylised UI','acf'),
'instructions' => '',
'type' => 'radio',
'name' => 'ui',
'choices' => array(
1 => __("Yes",'acf'),
0 => __("No",'acf'),
),
'layout' => 'horizontal',
));
// ajax
acf_render_field_setting( $field, array(
'label' => __('Use AJAX to lazy load choices?','acf'),
'instructions' => '',
'type' => 'radio',
'name' => 'ajax',
'choices' => array(
1 => __("Yes",'acf'),
0 => __("No",'acf'),
),
'layout' => 'horizontal',
));
}
/*
* load_value()
*
* This filter is applied to the $value after it is loaded from the db
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $value (mixed) the value found in 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
*/
function load_value( $value, $post_id, $field ) {
// ACF4 null
if( $value === 'null' ) return false;
// return
return $value;
}
/*
* update_field()
*
* This filter is appied to the $field before it is saved to the database
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $field - the field array holding all the field options
* @param $post_id - the field group ID (post_type = acf)
*
* @return $field - the modified field
*/
function update_field( $field ) {
// decode choices (convert to array)
$field['choices'] = acf_decode_choices($field['choices']);
$field['default_value'] = acf_decode_choices($field['default_value'], true);
// return
return $field;
}
/*
* 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 $value;
}
// array
if( is_array($value) ) {
// save value as strings, so we can clearly search for them in SQL LIKE statements
$value = array_map('strval', $value);
}
// return
return $value;
}
/*
* translate_field
*
* This function will translate field settings
*
* @type function
* @date 8/03/2016
* @since 5.3.2
*
* @param $field (array)
* @return $field
*/
function translate_field( $field ) {
// translate
$field['choices'] = acf_translate( $field['choices'] );
// return
return $field;
}
}
new acf_field_select();
endif;
?>