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Current File : /home/akhalid/www/wp-content/themes/maxsym-theme/includes/acf/fields/class-acf-field-clone.php
<?php

if ( ! class_exists( 'acf_field_clone' ) ) :

	class acf_field_clone 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 initialize() {

			// vars
			$this->name      = 'clone';
			$this->label     = _x( 'Clone', 'noun', 'acf' );
			$this->category  = 'layout';
			$this->defaults  = array(
				'clone'        => '',
				'prefix_label' => 0,
				'prefix_name'  => 0,
				'display'      => 'seamless',
				'layout'       => 'block',
			);
			$this->cloning   = array();
			$this->have_rows = 'single';

			// register filter
			acf_enable_filter( 'clone' );

			// ajax
			add_action( 'wp_ajax_acf/fields/clone/query', array( $this, 'ajax_query' ) );

			// filters
			add_filter( 'acf/get_fields', array( $this, 'acf_get_fields' ), 5, 2 );
			add_filter( 'acf/prepare_field', array( $this, 'acf_prepare_field' ), 10, 1 );
			add_filter( 'acf/clone_field', array( $this, 'acf_clone_field' ), 10, 2 );

		}


		/*
		*  is_enabled
		*
		*  This function will return true if acf_local functionality is enabled
		*
		*  @type    function
		*  @date    14/07/2016
		*  @since   5.4.0
		*
		*  @param   n/a
		*  @return  n/a
		*/

		function is_enabled() {

			return acf_is_filter_enabled( 'clone' );

		}


		/*
		*  load_field()
		*
		*  This filter is appied to the $field after it is loaded from the database
		*
		*  @type    filter
		*  @since   3.6
		*  @date    23/01/13
		*
		*  @param   $field - the field array holding all the field options
		*
		*  @return  $field - the field array holding all the field options
		*/

		function load_field( $field ) {

			// bail early if not enabled
			if ( ! $this->is_enabled() ) {
				return $field;
			}

			// load sub fields
			// - sub field name's will be modified to include prefix_name settings
			$field['sub_fields'] = $this->get_cloned_fields( $field );

			// return
			return $field;

		}


		/*
		*  acf_get_fields
		*
		*  This function will hook into the 'acf/get_fields' filter and inject/replace seamless clones fields
		*
		*  @type    function
		*  @date    17/06/2016
		*  @since   5.3.8
		*
		*  @param   $fields (array)
		*  @param   $parent (array)
		*  @return  $fields
		*/

		function acf_get_fields( $fields, $parent ) {

			// bail early if empty
			if ( empty( $fields ) ) {
				return $fields;
			}

			// bail early if not enabled
			if ( ! $this->is_enabled() ) {
				return $fields;
			}

			// vars
			$i = 0;

			// loop
			while ( $i < count( $fields ) ) {

				// vars
				$field = $fields[ $i ];

				// $i
				$i++;

				// bail early if not a clone field
				if ( $field['type'] != 'clone' ) {
					continue;
				}

				// bail early if not seamless
				if ( $field['display'] != 'seamless' ) {
					continue;
				}

				// bail early if sub_fields isn't set or not an array
				if ( ! isset( $field['sub_fields'] ) || ! is_array( $field['sub_fields'] ) ) {
					continue;
				}

				// replace this clone field with sub fields
				$i--;
				array_splice( $fields, $i, 1, $field['sub_fields'] );

			}

			// return
			return $fields;

		}


		/*
		*  get_cloned_fields
		*
		*  This function will return an array of fields for a given clone field
		*
		*  @type    function
		*  @date    28/06/2016
		*  @since   5.3.8
		*
		*  @param   $field (array)
		*  @param   $parent (array)
		*  @return  (array)
		*/

		function get_cloned_fields( $field ) {

			// vars
			$fields = array();

			// bail early if no clone setting
			if ( empty( $field['clone'] ) ) {
				return $fields;
			}

			// bail early if already cloning this field (avoid infinite looping)
			if ( isset( $this->cloning[ $field['key'] ] ) ) {
				return $fields;
			}

			// update local ref
			$this->cloning[ $field['key'] ] = 1;

			// Loop over selectors and load fields.
			foreach ( $field['clone'] as $selector ) {

				// Field Group selector.
				if ( acf_is_field_group_key( $selector ) ) {

					$field_group = acf_get_field_group( $selector );
					if ( ! $field_group ) {
						continue;
					}

					$field_group_fields = acf_get_fields( $field_group );
					if ( ! $field_group_fields ) {
						continue;
					}

					$fields = array_merge( $fields, $field_group_fields );

					// Field selector.
				} elseif ( acf_is_field_key( $selector ) ) {
					$fields[] = acf_get_field( $selector );
				}
			}

			// field has ve been loaded for this $parent, time to remove cloning ref
			unset( $this->cloning[ $field['key'] ] );

			// clear false values (fields that don't exist)
			$fields = array_filter( $fields );

			// bail early if no sub fields
			if ( empty( $fields ) ) {
				return array();
			}

			// loop
			// run acf_clone_field() on each cloned field to modify name, key, etc
			foreach ( array_keys( $fields ) as $i ) {

				$fields[ $i ] = acf_clone_field( $fields[ $i ], $field );

			}

			// return
			return $fields;

		}


		/*
		*  acf_clone_field
		*
		*  This function is run when cloning a clone field
		*  Important to run the acf_clone_field function on sub fields to pass on settings such as 'parent_layout'
		*
		*  @type    function
		*  @date    28/06/2016
		*  @since   5.3.8
		*
		*  @param   $field (array)
		*  @param   $clone_field (array)
		*  @return  $field
		*/

		function acf_clone_field( $field, $clone_field ) {

			// bail early if this field is being cloned by some other kind of field (future proof)
			if ( $clone_field['type'] != 'clone' ) {
				return $field;
			}

			// backup (used later)
			// - backup only once (cloned clone fields can cause issues)
			if ( ! isset( $field['__key'] ) ) {

				$field['__key']   = $field['key'];
				$field['__name']  = $field['_name'];
				$field['__label'] = $field['label'];

			}

			// seamless
			if ( $clone_field['display'] == 'seamless' ) {

				// modify key
				// - this will allow sub clone fields to correctly load values for the same cloned field
				// - the original key will later be restored by acf/prepare_field allowing conditional logic JS to work
				$field['key'] = $clone_field['key'] . '_' . $field['key'];

				// modify prefix allowing clone field to save sub fields
				// - only used for parent seamless fields. Block or sub field's prefix will be overriden which also works
				$field['prefix'] = $clone_field['prefix'] . '[' . $clone_field['key'] . ']';

				// modify parent
				$field['parent'] = $clone_field['parent'];

				// label_format
				if ( $clone_field['prefix_label'] ) {

					$field['label'] = $clone_field['label'] . ' ' . $field['label'];

				}
			}

			// prefix_name
			if ( $clone_field['prefix_name'] ) {

				// modify the field name
				// - this will allow field to load / save correctly
				$field['name'] = $clone_field['name'] . '_' . $field['_name'];

				// modify the field _name (orig name)
				// - this will allow fields to correctly understand the modified field
				if ( $clone_field['display'] == 'seamless' ) {

					$field['_name'] = $clone_field['_name'] . '_' . $field['_name'];

				}
			}

			// required
			if ( $clone_field['required'] ) {

				$field['required'] = 1;

			}

			// type specific
			// note: seamless clone fields will not be triggered
			if ( $field['type'] == 'clone' ) {

				$field = $this->acf_clone_clone_field( $field, $clone_field );

			}

			// return
			return $field;

		}


		/*
		*  acf_clone_clone_field
		*
		*  This function is run when cloning a clone field
		*  Important to run the acf_clone_field function on sub fields to pass on settings such as 'parent_layout'
		*  Do not delete! Removing this logic causes major issues with cloned clone fields within a flexible content layout.
		*
		*  @type    function
		*  @date    28/06/2016
		*  @since   5.3.8
		*
		*  @param   $field (array)
		*  @param   $clone_field (array)
		*  @return  $field
		*/

		function acf_clone_clone_field( $field, $clone_field ) {

			// modify the $clone_field name
			// This seems odd, however, the $clone_field is later passed into the acf_clone_field() function
			// Do not delete!
			// when cloning a clone field, it is important to also change the _name too
			// this allows sub clone fields to appear correctly in get_row() row array
			if ( $field['prefix_name'] ) {

				$clone_field['name']  = $field['_name'];
				$clone_field['_name'] = $field['_name'];

			}

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return $field;
			}

			// loop
			foreach ( $field['sub_fields'] as &$sub_field ) {

				// clone
				$sub_field = acf_clone_field( $sub_field, $clone_field );

			}

			// return
			return $field;

		}


		/*
		*  prepare_field_for_db
		*
		*  description
		*
		*  @type    function
		*  @date    4/11/16
		*  @since   5.5.0
		*
		*  @param   $post_id (int)
		*  @return  $post_id (int)
		*/

		function prepare_field_for_db( $field ) {

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return $field;
			}

			// bail early if name == _name
			// this is a parent clone field and does not require any modification to sub field names
			if ( $field['name'] == $field['_name'] ) {
				return $field;
			}

			// this is a sub field
			// _name = 'my_field'
			// name = 'rep_0_my_field'
			// modify all sub fields to add 'rep_0_' name prefix (prefix_name setting has already been applied)
			$length = strlen( $field['_name'] );
			$prefix = substr( $field['name'], 0, -$length );

			// bail early if _name is not found at the end of name (unknown potential error)
			if ( $prefix . $field['_name'] !== $field['name'] ) {
				return $field;
			}

			// acf_log('== prepare_field_for_db ==');
			// acf_log('- clone name:', $field['name']);
			// acf_log('- clone _name:', $field['_name']);

			// loop
			foreach ( $field['sub_fields'] as &$sub_field ) {

				$sub_field['name'] = $prefix . $sub_field['name'];

			}

			// return
			return $field;

		}


		/*
		*  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 ) {

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return $value;
			}

			// modify names
			$field = $this->prepare_field_for_db( $field );

			// load sub fields
			$value = array();

			// loop
			foreach ( $field['sub_fields'] as $sub_field ) {

				// add value
				$value[ $sub_field['key'] ] = acf_get_value( $post_id, $sub_field );

			}

			// return
			return $value;

		}


		/*
		*  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 ) {

			// bail early if no value
			if ( empty( $value ) ) {
				return false;
			}

			// modify names
			$field = $this->prepare_field_for_db( $field );

			// loop
			foreach ( $field['sub_fields'] as $sub_field ) {

				// extract value
				$sub_value = acf_extract_var( $value, $sub_field['key'] );

				// format value
				$sub_value = acf_format_value( $sub_value, $post_id, $sub_field );

				// append to $row
				$value[ $sub_field['__name'] ] = $sub_value;

			}

			// return
			return $value;

		}

		/**
		 * Apply basic formatting to prepare the value for default REST output.
		 *
		 * @param mixed      $value
		 * @param string|int $post_id
		 * @param array      $field
		 * @return mixed
		 */
		public function format_value_for_rest( $value, $post_id, array $field ) {
			if ( empty( $value ) || ! is_array( $value ) ) {
				return $value;
			}

			if ( ! is_array( $field ) || ! isset( $field['sub_fields'] ) || ! is_array( $field['sub_fields'] ) ) {
				return $value;
			}

			// Loop through each row and within that, each sub field to process sub fields individually.
			foreach ( $field['sub_fields'] as $sub_field ) {

				// Extract the sub field 'field_key'=>'value' pair from the $value and format it.
				$sub_value = acf_extract_var( $value, $sub_field['key'] );
				$sub_value = acf_format_value_for_rest( $sub_value, $post_id, $sub_field );

				// Add the sub field value back to the $value but mapped to the field name instead
				// of the key reference.
				$value[ $sub_field['name'] ] = $sub_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   $field - the field array holding all the field options
		*  @param   $post_id - the $post_id of which the value will be saved
		*
		*  @return  $value - the modified value
		*/

		function update_value( $value, $post_id, $field ) {

			// bail early if no value
			if ( ! acf_is_array( $value ) ) {
				return null;
			}

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return null;
			}

			// modify names
			$field = $this->prepare_field_for_db( $field );

			// loop
			foreach ( $field['sub_fields'] as $sub_field ) {

				// vars
				$v = false;

				// key (backend)
				if ( isset( $value[ $sub_field['key'] ] ) ) {

					$v = $value[ $sub_field['key'] ];

					// name (frontend)
				} elseif ( isset( $value[ $sub_field['_name'] ] ) ) {

					$v = $value[ $sub_field['_name'] ];

					// empty
				} else {

					// input is not set (hidden by conditioanl logic)
					continue;

				}

				// restore original field key
				$sub_field = $this->acf_prepare_field( $sub_field );

				// update value
				acf_update_value( $v, $post_id, $sub_field );

			}

			// 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 ) {

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return;
			}

			// load values
			foreach ( $field['sub_fields'] as &$sub_field ) {

				// add value
				if ( isset( $field['value'][ $sub_field['key'] ] ) ) {

					// this is a normal value
					$sub_field['value'] = $field['value'][ $sub_field['key'] ];

				} elseif ( isset( $sub_field['default_value'] ) ) {

					// no value, but this sub field has a default value
					$sub_field['value'] = $sub_field['default_value'];

				}

				// update prefix to allow for nested values
				$sub_field['prefix'] = $field['name'];

				// restore label
				$sub_field['label'] = $sub_field['__label'];

				// restore required
				if ( $field['required'] ) {
					$sub_field['required'] = 0;
				}
			}

			// render
			if ( $field['layout'] == 'table' ) {

				$this->render_field_table( $field );

			} else {

				$this->render_field_block( $field );

			}

		}


		/*
		*  render_field_block
		*
		*  description
		*
		*  @type    function
		*  @date    12/07/2016
		*  @since   5.4.0
		*
		*  @param   $post_id (int)
		*  @return  $post_id (int)
		*/

		function render_field_block( $field ) {

			// vars
			$label_placement = $field['layout'] == 'block' ? 'top' : 'left';

			// html
			echo '<div class="acf-clone-fields acf-fields -' . $label_placement . ' -border">';

			foreach ( $field['sub_fields'] as $sub_field ) {

				acf_render_field_wrap( $sub_field );

			}

			echo '</div>';

		}


		/*
		*  render_field_table
		*
		*  description
		*
		*  @type    function
		*  @date    12/07/2016
		*  @since   5.4.0
		*
		*  @param   $post_id (int)
		*  @return  $post_id (int)
		*/

		function render_field_table( $field ) {

			?>
<table class="acf-table">
	<thead>
		<tr>
			<?php
			foreach ( $field['sub_fields'] as $sub_field ) :

				// Prepare field (allow sub fields to be removed).
				$sub_field = acf_prepare_field( $sub_field );
				if ( ! $sub_field ) {
					continue;
				}

				// Define attrs.
				$attrs              = array();
				$attrs['class']     = 'acf-th';
				$attrs['data-name'] = $sub_field['_name'];
				$attrs['data-type'] = $sub_field['type'];
				$attrs['data-key']  = $sub_field['key'];

				if ( $sub_field['wrapper']['width'] ) {
					$attrs['data-width'] = $sub_field['wrapper']['width'];
					$attrs['style']      = 'width: ' . $sub_field['wrapper']['width'] . '%;';
				}

				?>
			<th <?php echo acf_esc_attrs( $attrs ); ?>>
				<?php acf_render_field_label( $sub_field ); ?>
				<?php acf_render_field_instructions( $sub_field ); ?>
			</th>
			<?php endforeach; ?>
		</tr>
	</thead>
	<tbody>
		<tr class="acf-row">
			<?php

			foreach ( $field['sub_fields'] as $sub_field ) {

				acf_render_field_wrap( $sub_field, 'td' );

			}

			?>
		</tr>
	</tbody>
</table>
			<?php

		}


		/*
		*  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
		*
		*  @param   $field  - an array holding all the field's data
		*
		*  @type    action
		*  @since   3.6
		*  @date    23/01/13
		*/

		function render_field_settings( $field ) {

			// temp enable 'local' to allow .json fields to be displayed
			acf_enable_filter( 'local' );

			// default_value
			acf_render_field_setting(
				$field,
				array(
					'label'        => __( 'Fields', 'acf' ),
					'instructions' => __( 'Select one or more fields you wish to clone', 'acf' ),
					'type'         => 'select',
					'name'         => 'clone',
					'multiple'     => 1,
					'allow_null'   => 1,
					'choices'      => $this->get_clone_setting_choices( $field['clone'] ),
					'ui'           => 1,
					'ajax'         => 1,
					'ajax_action'  => 'acf/fields/clone/query',
					'placeholder'  => '',
				)
			);

			acf_disable_filter( 'local' );

			// display
			acf_render_field_setting(
				$field,
				array(
					'label'        => __( 'Display', 'acf' ),
					'instructions' => __( 'Specify the style used to render the clone field', 'acf' ),
					'type'         => 'select',
					'name'         => 'display',
					'class'        => 'setting-display',
					'choices'      => array(
						'group'    => __( 'Group (displays selected fields in a group within this field)', 'acf' ),
						'seamless' => __( 'Seamless (replaces this field with selected fields)', 'acf' ),
					),
				)
			);

			// layout
			acf_render_field_setting(
				$field,
				array(
					'label'        => __( 'Layout', 'acf' ),
					'instructions' => __( 'Specify the style used to render the selected fields', 'acf' ),
					'type'         => 'radio',
					'name'         => 'layout',
					'layout'       => 'horizontal',
					'choices'      => array(
						'block' => __( 'Block', 'acf' ),
						'table' => __( 'Table', 'acf' ),
						'row'   => __( 'Row', 'acf' ),
					),
				)
			);

			// prefix_label
			$instructions = __( 'Labels will be displayed as %s', 'acf' );
			$instructions = sprintf( $instructions, '<code class="prefix-label-code-1"></code>' );
			acf_render_field_setting(
				$field,
				array(
					'label'        => __( 'Prefix Field Labels', 'acf' ),
					'instructions' => $instructions,
					'name'         => 'prefix_label',
					'class'        => 'setting-prefix-label',
					'type'         => 'true_false',
					'ui'           => 1,
				)
			);

			// prefix_name
			$instructions = __( 'Values will be saved as %s', 'acf' );
			$instructions = sprintf( $instructions, '<code class="prefix-name-code-1"></code>' );
			acf_render_field_setting(
				$field,
				array(
					'label'        => __( 'Prefix Field Names', 'acf' ),
					'instructions' => $instructions,
					'name'         => 'prefix_name',
					'class'        => 'setting-prefix-name',
					'type'         => 'true_false',
					'ui'           => 1,
				)
			);

		}


		/*
		*  get_clone_setting_choices
		*
		*  This function will return an array of choices data for Select2
		*
		*  @type    function
		*  @date    17/06/2016
		*  @since   5.3.8
		*
		*  @param   $value (mixed)
		*  @return  (array)
		*/

		function get_clone_setting_choices( $value ) {

			// vars
			$choices = array();

			// bail early if no $value
			if ( empty( $value ) ) {
				return $choices;
			}

			// force value to array
			$value = acf_get_array( $value );

			// loop
			foreach ( $value as $v ) {

				$choices[ $v ] = $this->get_clone_setting_choice( $v );

			}

			// return
			return $choices;

		}


		/*
		*  get_clone_setting_choice
		*
		*  This function will return the label for a given clone choice
		*
		*  @type    function
		*  @date    17/06/2016
		*  @since   5.3.8
		*
		*  @param   $selector (mixed)
		*  @return  (string)
		*/

		function get_clone_setting_choice( $selector = '' ) {

			// bail early no selector
			if ( ! $selector ) {
				return '';
			}

			// phpcs:disable WordPress.Security.NonceVerification.Missing -- Verified elsewhere.
			// ajax_fields
			if ( isset( $_POST['fields'][ $selector ] ) ) {

				return $this->get_clone_setting_field_choice( acf_sanitize_request_args( $_POST['fields'][ $selector ] ) );

			}
			// phpcs:enable WordPress.Security.NonceVerification.Missing

			// field
			if ( acf_is_field_key( $selector ) ) {

				return $this->get_clone_setting_field_choice( acf_get_field( $selector ) );

			}

			// group
			if ( acf_is_field_group_key( $selector ) ) {

				return $this->get_clone_setting_group_choice( acf_get_field_group( $selector ) );

			}

			// return
			return $selector;

		}


		/*
		*  get_clone_setting_field_choice
		*
		*  This function will return the text for a field choice
		*
		*  @type    function
		*  @date    20/07/2016
		*  @since   5.4.0
		*
		*  @param   $field (array)
		*  @return  (string)
		*/

		function get_clone_setting_field_choice( $field ) {

			// bail early if no field
			if ( ! $field ) {
				return __( 'Unknown field', 'acf' );
			}

			// title
			$title = $field['label'] ? $field['label'] : __( '(no title)', 'acf' );

			// append type
			$title .= ' (' . $field['type'] . ')';

			// ancestors
			// - allow for AJAX to send through ancestors count
			$ancestors = isset( $field['ancestors'] ) ? $field['ancestors'] : count( acf_get_field_ancestors( $field ) );
			$title     = str_repeat( '- ', $ancestors ) . $title;

			// return
			return $title;

		}


		/*
		*  get_clone_setting_group_choice
		*
		*  This function will return the text for a group choice
		*
		*  @type    function
		*  @date    20/07/2016
		*  @since   5.4.0
		*
		*  @param   $field_group (array)
		*  @return  (string)
		*/

		function get_clone_setting_group_choice( $field_group ) {

			// bail early if no field group
			if ( ! $field_group ) {
				return __( 'Unknown field group', 'acf' );
			}

			// return
			return sprintf( __( 'All fields from %s field group', 'acf' ), $field_group['title'] );

		}


		/*
		*  ajax_query
		*
		*  description
		*
		*  @type    function
		*  @date    17/06/2016
		*  @since   5.3.8
		*
		*  @param   $post_id (int)
		*  @return  $post_id (int)
		*/

		function ajax_query() {

			// validate
			if ( ! acf_verify_ajax() ) {
				die();
			}

			// disable field to allow clone fields to appear selectable
			acf_disable_filter( 'clone' );

			// options
			$options = acf_parse_args(
				$_POST,
				array(
					'post_id' => 0,
					'paged'   => 0,
					's'       => '',
					'title'   => '',
					'fields'  => array(),
				)
			);

			// vars
			$results     = array();
			$s           = false;
			$i           = -1;
			$limit       = 20;
			$range_start = $limit * ( $options['paged'] - 1 );  // 0,  20, 40
			$range_end   = $range_start + ( $limit - 1 );         // 19, 39, 59

			// search
			if ( $options['s'] !== '' ) {

				// strip slashes (search may be integer)
				$s = wp_unslash( strval( $options['s'] ) );

			}

			// load groups
			$field_groups = acf_get_field_groups();
			$field_group  = false;

			// bail early if no field groups
			if ( empty( $field_groups ) ) {
				die();
			}

			// move current field group to start
			foreach ( array_keys( $field_groups ) as $j ) {

				// check ID
				if ( $field_groups[ $j ]['ID'] !== $options['post_id'] ) {
					continue;
				}

				// extract field group and move to start
				$field_group = acf_extract_var( $field_groups, $j );

				// field group found, stop looking
				break;

			}

			// if field group was not found, this is a new field group (not yet saved)
			if ( ! $field_group ) {

				$field_group = array(
					'ID'    => $options['post_id'],
					'title' => $options['title'],
					'key'   => '',
				);

			}

			// move current field group to start of list
			array_unshift( $field_groups, $field_group );

			// loop
			foreach ( $field_groups as $field_group ) {

				// vars
				$fields   = false;
				$ignore_s = false;
				$data     = array(
					'text'     => $field_group['title'],
					'children' => array(),
				);

				// get fields
				if ( $field_group['ID'] == $options['post_id'] ) {

					$fields = $options['fields'];

				} else {

					$fields = acf_get_fields( $field_group );
					$fields = acf_prepare_fields_for_import( $fields );

				}

				// bail early if no fields
				if ( ! $fields ) {
					continue;
				}

				// show all children for field group search match
				if ( $s !== false && stripos( $data['text'], $s ) !== false ) {

					$ignore_s = true;

				}

				// populate children
				$children   = array();
				$children[] = $field_group['key'];
				foreach ( $fields as $field ) {
					$children[] = $field['key']; }

				// loop
				foreach ( $children as $child ) {

					// bail early if no key (fake field group or corrupt field)
					if ( ! $child ) {
						continue;
					}

					// vars
					$text = false;

					// bail early if is search, and $text does not contain $s
					if ( $s !== false && ! $ignore_s ) {

						// get early
						$text = $this->get_clone_setting_choice( $child );

						// search
						if ( stripos( $text, $s ) === false ) {
							continue;
						}
					}

					// $i
					$i++;

					// bail early if $i is out of bounds
					if ( $i < $range_start || $i > $range_end ) {
						continue;
					}

					// load text
					if ( $text === false ) {
						$text = $this->get_clone_setting_choice( $child );
					}

					// append
					$data['children'][] = array(
						'id'   => $child,
						'text' => $text,
					);

				}

				// bail early if no children
				// - this group contained fields, but none shown on this page
				if ( empty( $data['children'] ) ) {
					continue;
				}

				// append
				$results[] = $data;

				// end loop if $i is out of bounds
				// - no need to look further
				if ( $i > $range_end ) {
					break;
				}
			}

			// return
			acf_send_ajax_results(
				array(
					'results' => $results,
					'limit'   => $limit,
				)
			);

		}


		/*
		*  acf_prepare_field
		*
		*  This function will restore a field's key ready for input
		*
		*  @type    function
		*  @date    6/09/2016
		*  @since   5.4.0
		*
		*  @param   $field (array)
		*  @return  $field
		*/

		function acf_prepare_field( $field ) {

			// bail early if not cloned
			if ( empty( $field['_clone'] ) ) {
				return $field;
			}

			// restore key
			if ( isset( $field['__key'] ) ) {
				$field['key'] = $field['__key'];
			}

			// return
			return $field;

		}


		/*
		*  validate_value
		*
		*  description
		*
		*  @type    function
		*  @date    11/02/2014
		*  @since   5.0.0
		*
		*  @param   $post_id (int)
		*  @return  $post_id (int)
		*/

		function validate_value( $valid, $value, $field, $input ) {

			// bail early if no $value
			if ( empty( $value ) ) {
				return $valid;
			}

			// bail early if no sub fields
			if ( empty( $field['sub_fields'] ) ) {
				return $valid;
			}

			// loop
			foreach ( array_keys( $field['sub_fields'] ) as $i ) {

				// get sub field
				$sub_field = $field['sub_fields'][ $i ];
				$k         = $sub_field['key'];

				// bail early if valu enot set (conditional logic?)
				if ( ! isset( $value[ $k ] ) ) {
					continue;
				}

				// validate
				acf_validate_value( $value[ $k ], $sub_field, "{$input}[{$k}]" );

			}

			// return
			return $valid;

		}

		/**
		 * Return the schema array for the REST API.
		 *
		 * @param array $field
		 * @return array
		 */
		public function get_rest_schema( array $field ) {
			$schema = array(
				'type'     => array( 'object', 'null' ),
				'required' => ! empty( $field['required'] ) ? array() : false,
				'items'    => array(
					'type'       => 'object',
					'properties' => array(),
				),
			);

			foreach ( $field['sub_fields'] as $sub_field ) {
				/** @var acf_field $type */
				$type = acf_get_field_type( $sub_field['type'] );

				if ( ! $type ) {
					continue;
				}

				$sub_field_schema = $type->get_rest_schema( $sub_field );

				// Passing null to nested fields has no effect. Remove this as a possible type to prevent
				// confusion in the schema.
				$null_type_index = array_search( 'null', $sub_field_schema['type'] );
				if ( $null_type_index !== false ) {
					unset( $sub_field_schema['type'][ $null_type_index ] );
				}

				$schema['items']['properties'][ $sub_field['name'] ] = $sub_field_schema;

				/**
				 * If the clone field itself is marked as required, all subfields are required,
				 * regardless of the status of the original fields.
				 */
				if ( is_array( $schema['required'] ) ) {
					$schema['required'][] = $sub_field['name'];
				}
			}

			return $schema;
		}

	}


	// initialize
	acf_register_field_type( 'acf_field_clone' );

endif; // class_exists check

?>

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