post-type.php

<?php

class acf_field_post_type extends acf_field
{
	/*
	*  __construct
	*
	*  Set name / label needed for actions / filters
	*
	*  @since	3.6
	*  @date	23/01/13
	*/
	
	function __construct()
	{
		// vars
		$this->name = 'post_type';
		$this->label = __("Post Type",'acf');
		$this->category = __("Relational",'acf');
		$this->defaults = array(
			'post_type' => array('all'),
			'multiple' => 0,
			'allow_null' => 0,
		);
		
		
		// do not delete!
    	parent::__construct();
  
	}
	
	
	/*
	*  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( $field )
	{
		// validate post_type
		if( !$field['post_type'] || !is_array($field['post_type']) || in_array('', $field['post_type']) )
		{
			$field['post_type'] = array( 'all' );
		}
		
		
		// return
		return $field;
	}
	
	
	/*
	*  create_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 create_field( $field )
	{
		// global
		global $post;
		
		
		// vars
		$args = array(
			'numberposts' => -1,
			'post_type' => null,
			'orderby' => 'title',
			'order' => 'ASC',
			'post_status' => array('publish', 'private', 'draft', 'inherit', 'future'),
			'suppress_filters' => false,
		);
		
		
		// load all post types by default
		if( in_array('all', $field['post_type']) )
		{
			$field['post_type'] = apply_filters('acf/get_post_types', array());
		}
		
		
		// Change Field into a select
		$field['type'] = 'select';
		$field['choices'] = array();
		$field_choices = array();

		
		foreach( $field['post_type'] as $post_type )
		{
			// get post type label
			$post_object = get_post_type_object( $post_type );
			$post_type_name = $post_object->labels->name;
			// set post type and label as choices
			$field_choice = array( $post_type => $post_type_name );
			$field_choices = array_merge( $field_choices, $field_choice );
		}
		// foreach( $field['post_type'] as $post_type )

		$field['choices'] = $field_choices;
		

		// create field
		do_action('acf/create_field', $field );
	}
	
	
	/*
	*  create_options()
	*
	*  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 create_options( $field )
	{
		// vars
		$key = $field['name'];
		
		?>
<tr class="field_option field_option_<?php echo $this->name; ?>">
	<td class="label">
		<label for=""><?php _e("Post Type",'acf'); ?></label>
	</td>
	<td>
		<?php 
		
		$choices = array(
			'all'	=>	__("All",'acf')
		);
		$choices = apply_filters('acf/get_post_types', $choices);
		
		
		do_action('acf/create_field', array(
			'type'	=>	'select',
			'name'	=>	'fields['.$key.'][post_type]',
			'value'	=>	$field['post_type'],
			'choices'	=>	$choices,
			'multiple'	=>	1,
		));
		
		?>
	</td>
</tr>
<tr class="field_option field_option_<?php echo $this->name; ?>">
	<td class="label">
		<label><?php _e("Allow Null?",'acf'); ?></label>
	</td>
	<td>
		<?php
		
		do_action('acf/create_field', array(
			'type'	=>	'radio',
			'name'	=>	'fields['.$key.'][allow_null]',
			'value'	=>	$field['allow_null'],
			'choices'	=>	array(
				1	=>	__("Yes",'acf'),
				0	=>	__("No",'acf'),
			),
			'layout'	=>	'horizontal',
		));
		
		?>
	</td>
</tr>
<tr class="field_option field_option_<?php echo $this->name; ?>">
	<td class="label">
		<label><?php _e("Select multiple values?",'acf'); ?></label>
	</td>
	<td>
		<?php
		
		do_action('acf/create_field', array(
			'type'	=>	'radio',
			'name'	=>	'fields['.$key.'][multiple]',
			'value'	=>	$field['multiple'],
			'choices'	=>	array(
				1	=>	__("Yes",'acf'),
				0	=>	__("No",'acf'),
			),
			'layout'	=>	'horizontal',
		));
		
		?>
	</td>
</tr>
		<?php
		
	}
	
	
	/*
	*  format_value_for_api()
	*
	*  This filter is appied to the $value after it is loaded from the db and before it is passed back to the api functions such as the_field
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value	- the value which was loaded from the database
	*  @param	$post_id - the $post_id from which the value was loaded
	*  @param	$field	- the field array holding all the field options
	*
	*  @return	$value	- the modified value
	*/
	
	function format_value_for_api( $value, $post_id, $field )
	{
		// no value?
		if( !$value )
		{
			return false;
		}
		
		
		// null?
		if( $value == 'null' )
		{
			return false;
		}
		
		
		// return the 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;
		}
		
		
		if( is_object($value) && isset($value->ID) )
		{
			// object
			$value = $value->ID;
			
		}
		elseif( 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);
			
		}
		
		return $value;
	}
	
}

new acf_field_post_type();

?>