<?php 



class acf_local {

	

	// vars

	var $enabled	= true,

		$groups 	= array(),

		$fields 	= array(),

		$parents 	= array();

		

		

	function __construct() {

		

		add_filter('acf/get_field_groups', array($this, 'get_field_groups'), 10, 1);

		add_action('acf/delete_field', 	array($this, 'delete_field'), 10, 1);

		

	}

	

	

	/*

	*  get_field_groups

	*

	*  This function will override and add field groups to the `acf_get_field_groups()` results

	*

	*  @type	filter (acf/get_field_groups)

	*  @date	5/12/2013

	*  @since	5.0.0

	*

	*  @param	$field_groups (array)

	*  @return	$field_groups

	*/

	

	function get_field_groups( $field_groups ) {

		

		// validate

		if( !acf_have_local_field_groups() ) {

			

			return $field_groups;

			

		}

		

		

		// vars

		$ignore = array();

		$added = false;

		

		

		// populate ignore list

		if( !empty($field_groups) ) {

			

			foreach( $field_groups as $k => $group ) {



				$ignore[] = $group['key'];

				

			}

			

		}

		

		

		// append field groups

		$groups = acf_get_local_field_groups();

		

		foreach( $groups as $group ) {

			

			// is ignore

			if( in_array($group['key'], $ignore) ) {

				

				continue;

					

			}

			

			

			// append

			$field_groups[] = $group;

			$added = true;

			

		}

		

		

		// order field groups based on menu_order, title

		if( $added ) {

			

			$menu_order = array();

			$title = array();

			

			foreach( $field_groups as $key => $row ) {

				

			    $menu_order[ $key ] = $row['menu_order'];

			    $title[ $key ] = $row['title'];

			}

			

			

			// sort the array with menu_order ascending

			array_multisort( $menu_order, SORT_ASC, $title, SORT_ASC, $field_groups );

				

		}

		

		

		// return

		return $field_groups;

		

	}

	

	

	/*

	*  delete_field

	*

	*  description

	*

	*  @type	function

	*  @date	10/12/2014

	*  @since	5.1.5

	*

	*  @param	$post_id (int)

	*  @return	$post_id (int)

	*/

	

	function delete_field( $field ) {

		

		$this->remove_field( $field['key'] );

		

	}

	

	

	/*

	*  add_field_group

	*

	*  This function will add a $field group to the local placeholder

	*

	*  @type	function

	*  @date	10/03/2014

	*  @since	5.0.0

	*

	*  @param	$field_group (array)

	*  @return	n/a

	*/

	

	function add_field_group( $field_group ) {

		

		// validate

		$field_group = acf_get_valid_field_group($field_group);

		

		

		// don't allow overrides

		if( acf_is_local_field_group($field_group['key']) ) {

			

			return;	

			

		}

		

		

		// add local

		if( empty($field_group['local']) ) {

			

			$field_group['local'] = 'php';

			

		}

		

		

		// remove fields

		$fields = acf_extract_var($field_group, 'fields');

		

		

		// format fields

		$fields = acf_prepare_fields_for_import( $fields );

		

		

		// add field group

		$this->groups[ $field_group['key'] ] = $field_group;

		

		

		// add fields

		foreach( $fields as $field ) {

			

			// add parent

			if( empty($field['parent']) ) {

				

				$field['parent'] = $field_group['key'];

				

			}

			

			

			// add field

			$this->add_field( $field );

			

		}

		

	}

	

	

	/*

	*  add_field

	*

	*  This function will add a $field to the local placeholder

	*

	*  @type	function

	*  @date	10/03/2014

	*  @since	5.0.0

	*

	*  @param	$field (array)

	*  @return	n/a

	*/

	

	function add_field( $field ) {

		

		// vars

		// - allow for the very unexpected case where no key or parent exist

		$key = acf_maybe_get($field, 'key', '');

		$parent = acf_maybe_get($field, 'parent', '');

		

		

		// add parent reference

		$this->add_parent_reference( $parent, $key );

		

		

		// add in menu order

		$field['menu_order'] = count( $this->parents[ $parent ] ) - 1;

		

		

		// add field

		$this->fields[ $key ] = $field;

		

		

		// clear cache

		// - delete cache was origional added to ensure changes to JSON / PHP would appear in WP when using memcache

		// - the downside is that wp_cache_delet is taxing on the system so has been commented out

		//wp_cache_delete( "get_field/key={$key}", 'acf' );

		//wp_cache_delete( "get_fields/parent={$parent}", 'acf' );

		

	}

	

	

	/*

	*  remove_field

	*

	*  This function will remove a $field to the local placeholder

	*

	*  @type	function

	*  @date	10/03/2014

	*  @since	5.0.0

	*

	*  @param	$key (string)

	*  @return	n/a

	*/

	

	function remove_field( $key ) {

		

		// get field

		$field = acf_get_field( $key );

		

		

		// remove parent reference

		$this->remove_parent_reference( $field['parent'], $field['key'] );

		

		

		// remove field

		unset( $this->fields[ $key ] );

		

		

		// remove children

		if( acf_have_local_fields( $key) ) {

			

			acf_remove_local_fields( $key );

			

		}

		

	}

	

	

	function add_parent_reference( $parent_key, $field_key ) {

		

		// create array

		if( !isset($this->parents[ $parent_key ]) ) {

			

			$this->parents[ $parent_key ] = array();

			

		} elseif( in_array($field_key, $this->parents[ $parent_key ]) ) {

			

			// bail early if already in array

			return false;

			

		}

		

		

		// append

		$this->parents[ $parent_key ][] = $field_key;

		

		

		// return

		return true;

		

	}

	

	

	function remove_parent_reference( $parent_key, $field_key ) {

		

		// bail early if no parent

		if( !isset($this->parents[ $parent_key ]) ) {

			

			return false;

			

		}

		

		

		// remove

		$this->parents[ $parent_key ] = array_diff($this->parents[ $parent_key ], array($field_key));

		

		

		// return

		return true;

	}



	

}





/*

*  acf_local

*

*  This function will return the one true acf_local

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	n/a

*  @return	acf_local (object)

*/



function acf_local() {

	

	// globals

	global $acf_local;

	

	

	// instantiate

	if( !isset($acf_local) )

	{

		$acf_local = new acf_local();

	}

	

	

	// return

	return $acf_local;

}





/*

*  acf_disable_local

*

*  This function will disable the local functionality for DB only interaction

*

*  @type	function

*  @date	11/06/2014

*  @since	5.0.0

*

*  @param	n/a

*  @return	n/a

*/



function acf_disable_local() {

	

	acf_local()->enabled = false;

	

}





/*

*  acf_enable_local

*

*  This function will enable the local functionality

*

*  @type	function

*  @date	11/06/2014

*  @since	5.0.0

*

*  @param	n/a

*  @return	n/a

*/



function acf_enable_local() {

	

	acf_local()->enabled = true;

	

}





/*

*  acf_reset_local

*

*  This function will remove (reset) all field group and fields

*

*  @type	function

*  @date	2/06/2016

*  @since	5.3.8

*

*  @param	$post_id (int)

*  @return	$post_id (int)

*/



function acf_reset_local() {

	

	// vars

	acf_local()->groups = array();

	acf_local()->fields = array();

	acf_local()->parents = array();

	

}





/*

*  acf_is_local_enabled

*

*  This function will return true|false if the local functionality is enabled

*

*  @type	function

*  @date	11/06/2014

*  @since	5.0.0

*

*  @param	n/a

*  @return	n/a

*/



function acf_is_local_enabled() {

	

	// validate

	if( !acf_get_setting('local') ) {

		

		return false;

		

	}

	

	

	if( !acf_local()->enabled ) {

		

		return false;

		

	}

	

	

	// return

	return true;

	

}





/*

*  acf_count_local_field_groups

*

*  This function will return the number of local field groups

*

*  @type	function

*  @date	3/12/2014

*  @since	5.1.5

*

*  @param	$type (string) specify the type. eg. 'json'

*  @return	(int)

*/



function acf_count_local_field_groups( $type = '' ) {

	

	// vars

	$count = 0;

	

	

	// check for groups

	if( !empty(acf_local()->groups) ) {

		

		// acf_local

		foreach( acf_local()->groups as $group ) {

			

			// ignore if not specific type

			if( $type && $group['local'] != $type ) {

				

				continue;

				

			}

			

			$count++;

			

		}

		

	}

	

	

	// return

	return $count;

	

}





/*

*  acf_have_local_field_groups

*

*  This function will return true if fields exist for a given 'parent' key (field group key or field key)

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	n/a

*  @return	(bolean)

*/



function acf_have_local_field_groups() {

	

	// validate

	if( !acf_is_local_enabled() ) {

		

		return false;

		

	}

	

	

	// check for groups

	if( !empty(acf_local()->groups) ) {

		

		return true;

		

	}

	

	

	// return

	return false;

	

}





/*

*  acf_get_local_field_groups

*

*  This function will return an array of fields for a given 'parent' key (field group key or field key)

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_get_local_field_groups() {

	

	// bail early if no groups

	if( !acf_have_local_field_groups() ) {

		

		return false;

		

	}

	

	

	// vars

	$groups = array();

	

	

	// acf_local

	foreach( acf_local()->groups as $group ) {

		

		$groups[] = $group;

		

	}

	

	

	// return

	return $groups;

	

}





/*

*  acf_add_local_field_group

*

*  This function will add a $field group to the local placeholder

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$post_id (int)

*  @return	$post_id (int)

*/



function acf_add_local_field_group( $field_group ) {

	

	acf_local()->add_field_group( $field_group );

	

}





/*

*  acf_is_local_field_group

*

*  This function will return true if the field group has been added as local

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_is_local_field_group( $key ) {

	

	// validate

	if( !acf_is_local_enabled() ) {

		

		return false;

		

	}

	

	

	// check groups

	if( isset( acf_local()->groups[ $key ] ) ) {

		

		return true;

		

	}

	

	

	// return

	return false;

	

}





/*

*  acf_get_local_field_group

*

*  This function will return a local field group for a given key

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_get_local_field_group( $key ) {

	

	// bail early if no group

	if( !acf_is_local_field_group($key) ) {

		

		return false;

		

	}

	

	

	// return

	return acf_local()->groups[ $key ];

	

}





/*

*  acf_add_local_field

*

*  This function will add a $field to the local placeholder

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$post_id (int)

*  @return	$post_id (int)

*/



function acf_add_local_field( $field ) {

	

	acf_local()->add_field( $field );

	

}





/*

*  acf_remove_local_field

*

*  This function will remove a $field to the local placeholder

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$post_id (int)

*  @return	$post_id (int)

*/



function acf_remove_local_field( $key ) {

	

	acf_local()->remove_field( $key );

	

}





/*

*  acf_is_local_field

*

*  This function will return true if the field has been added as local

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_is_local_field( $key ) {

	

	// validate

	if( !acf_is_local_enabled() ) {

		

		return false;

		

	}

	

	

	// check fields

	if( isset( acf_local()->fields[ $key ] ) ) {

		

		return true;

		

	}

	

	

	// return

	return false;

	

}





/*

*  acf_get_local_field_group

*

*  This function will return a local field for a given key

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_get_local_field( $key ) {

	

	// bail early if no field

	if( !acf_is_local_field($key) ) {

		

		return false;

		

	}

	

	

	// return

	return acf_local()->fields[ $key ];

	

}





/*

*  acf_count_local_fields

*

*  This function will return the number of local fields for a parent

*

*  @type	function

*  @date	3/12/2014

*  @since	5.1.5

*

*  @param	n/a

*  @return	(int)

*/



function acf_count_local_fields( $key ) {

	

	// check for fields

	if( !empty(acf_local()->parents[ $key ]) ) {

		

		return count( acf_local()->parents[ $key ] );

		

	}

	

	

	// return

	return 0;

	

}





/*

*  acf_have_local_fields

*

*  This function will return true if fields exist for a given 'parent' key (field group key or field key)

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_have_local_fields( $key ) {



	// validate

	if( !acf_is_local_enabled() ) {

		

		return false;

		

	}

	

	

	// check parents

	if( isset( acf_local()->parents[ $key ] ) ) {

		

		return true;

		

	}

	

	

	// return

	return false;

	

}





/*

*  acf_get_local_fields

*

*  This function will return an array of fields for a given 'parent' key (field group key or field key)

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_get_local_fields( $parent ) {

	

	// bail early if no parent

	if( !acf_have_local_fields($parent) ) {

		

		return false;

		

	}

	

	

	// vars

	$fields = array();

	

	

	// append

	foreach( acf_local()->parents[ $parent ] as $key ) {

		

		$fields[] = acf_get_field( $key );

		

	}

	

	

	// return

	return $fields;

	

}





/*

*  acf_remove_local_fields

*

*  This function will remove the field reference for a field group

*

*  @type	function

*  @date	10/03/2014

*  @since	5.0.0

*

*  @param	$key (string)

*  @return	(bolean)

*/



function acf_remove_local_fields( $parent ) {

	

	// bail early if no reference

	if( empty( acf_local()->parents[ $parent ] ) ) {

		

		return false;

		

	}

	

	

	foreach( acf_local()->parents[ $parent ] as $key ) {

		

		acf_remove_local_field( $key );

	

	}

	

	

	// return

	return true;

}



?>