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<?php |
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/** |
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* Define the Wordlift_Mapping_Jsonld_Converter class to add JSON-LD generated from mappings. |
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* |
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* @since 3.25.0 |
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* @package Wordlift |
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* @subpackage Wordlift\Mappings |
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*/ |
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namespace Wordlift\Mappings; |
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/** |
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* This class takes the output from json-ld service and alter depends on the |
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* rule and properties defined in sync mappings. |
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* |
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* @since 3.25.0 |
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*/ |
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class Jsonld_Converter { |
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/** |
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* Enumerations for the field types. |
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* Enumerations for the field types. |
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*/ |
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const FIELD_TYPE_TEXT_FIELD = 'text'; |
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const FIELD_TYPE_CUSTOM_FIELD = 'custom_field'; |
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const FIELD_TYPE_ACF = 'acf'; |
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/** |
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* The {@link Mappings_Validator} instance to test. |
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* |
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* @since 3.25.0 |
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* @access private |
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* @var Mappings_Validator $validator The {@link Mappings_Validator} instance. |
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*/ |
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private $validator; |
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/** |
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* The {@link Mappings_Transform_Functions_Registry} instance. |
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* |
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* @since 3.25.0 |
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* @access private |
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* @var Mappings_Transform_Functions_Registry $transform_functions_registry The {@link Mappings_Transform_Functions_Registry} instance. |
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*/ |
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private $transform_functions_registry; |
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/** |
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* Initialize all dependencies required. |
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* |
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* @param Mappings_Validator $validator A {@link Mappings_Validator} instance. |
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* @param Mappings_Transform_Functions_Registry $transform_functions_registry |
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*/ |
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public function __construct( $validator, $transform_functions_registry ) { |
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$this->validator = $validator; |
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$this->transform_functions_registry = $transform_functions_registry; |
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// Hook to refactor the JSON-LD. |
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add_filter( 'wl_post_jsonld_array', array( $this, 'wl_post_jsonld_array' ), 11, 2 ); |
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add_filter( 'wl_entity_jsonld_array', array( $this, 'wl_post_jsonld_array' ), 11, 3 ); |
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} |
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/** |
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* Hook to `wl_post_jsonld_array` and `wl_entity_jsonld_array`. |
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* |
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* Receive the JSON-LD and the references in the array along with the post ID and transform them according to |
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* the configuration. |
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* |
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* @param array $value { |
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* The array containing the JSON-LD and the references. |
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* |
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* @type array $jsonld The JSON-LD array. |
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* @type int[] $references An array of post ID referenced by the JSON-LD (will be expanded by the converter). |
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* } |
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* |
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* @param int $post_id The post ID. |
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* |
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* @return array An array with the updated JSON-LD and references. |
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*/ |
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public function wl_post_jsonld_array( $value, $post_id ) { |
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$jsonld = $value['jsonld']; |
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$references = $value['references']; |
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return array( |
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'jsonld' => $this->wl_post_jsonld( $jsonld, $post_id, $references ), |
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'references' => $references, |
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); |
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} |
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/** |
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* Returns JSON-LD data after applying transformation functions. |
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* |
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* @param array $jsonld The JSON-LD structure. |
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* @param int $post_id The {@link WP_Post} id. |
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* @param array $references An array of post references. |
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* |
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* @return array the new refactored array structure. |
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* @since 3.25.0 |
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*/ |
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private function wl_post_jsonld( $jsonld, $post_id, &$references ) { |
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// @@todo I think there's an issue here with the Validator, because you're changing the instance state and the |
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// instance may be reused afterwards. |
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$properties = $this->validator->validate( $post_id ); |
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$nested_properties = array(); |
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foreach ( $properties as $property ) { |
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// If the property has the character '/' in the property name then it is a nested property. |
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if ( strpos( $property['property_name'], '/' ) !== false ) { |
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$nested_properties[] = $property; |
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continue; |
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} |
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$property_transformed_data = $this->get_property_data( $property, $jsonld, $post_id, $references ); |
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if ( false !== $property_transformed_data ) { |
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$jsonld[ $property['property_name'] ] = $property_transformed_data; |
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} |
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} |
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$jsonld = $this->process_nested_properties( $nested_properties, $jsonld, $post_id, $references ); |
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return $jsonld; |
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} |
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/** |
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* Get the property data by applying the transformation function |
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* |
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* @param $property |
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* @param $jsonld |
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* @param $post_id |
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* @param $references |
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* |
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* @return array|bool|null |
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*/ |
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public function get_property_data( $property, $jsonld, $post_id, &$references ) { |
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$transform_instance = $this->transform_functions_registry->get_transform_function( $property['transform_function'] ); |
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$data = $this->get_data_from_data_source( $post_id, $property ); |
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if ( null !== $transform_instance ) { |
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$transform_data = $transform_instance->transform_data( $data, $jsonld, $references, $post_id ); |
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if ( null !== $transform_data ) { |
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return $this->make_single( $transform_data ); |
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} |
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} else { |
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return $this->make_single( $data ); |
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} |
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return false; |
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} |
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/** |
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* Process all the nested properties. |
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* |
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* @param $nested_properties array |
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* @param $jsonld array |
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* |
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* @return array |
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*/ |
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public function process_nested_properties( $nested_properties, $jsonld, $post_id, &$references ) { |
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foreach ( $nested_properties as $property ) { |
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$property_data = $this->get_property_data( $property, $jsonld, $post_id, $references ); |
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if ( false === $property_data ) { |
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// No need to create nested levels. |
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continue; |
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} |
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$keys = explode( '/', $property['property_name'] ); |
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// end is the last level of the nested property. |
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$end = array_pop( $keys ); |
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$current_property_pointer = &$jsonld; |
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/** |
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* Once we find all the nested levels from the property name |
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* loop through it and create associative array if the levels |
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* didnt exist. |
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*/ |
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while ( count( $keys ) > 0 ) { |
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$key = array_shift( $keys ); |
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if ( $key === "" ) { |
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continue; |
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} |
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if ( ! array_key_exists( $key, $current_property_pointer ) ) { |
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$current_property_pointer[ $key ] = array(); |
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} |
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// We are setting the pointer to the current key, so that at the end |
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// we can add the data at last level. |
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$current_property_pointer = &$current_property_pointer[ $key ]; |
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} |
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$current_property_pointer[ $end ] = $property_data; |
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} |
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return $jsonld; |
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} |
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/** |
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* Returns data from data source. |
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* |
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* @param int $post_id Id of the post. |
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* @param array $property_data The property data for the post_id. |
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* |
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* @return array Returns key, value array, if the value is not found, then it returns null. |
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*/ |
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final public function get_data_from_data_source( $post_id, $property_data ) { |
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$value = $property_data['field_name']; |
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// Do 1 to 1 mapping and return result. |
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switch ( $property_data['field_type'] ) { |
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case self::FIELD_TYPE_ACF: |
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if ( ! function_exists( 'get_field' ) || ! function_exists( 'get_field_object' ) ) { |
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return array(); |
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} |
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return $this->get_data_for_acf_field( $property_data['field_name'], $post_id ); |
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case self::FIELD_TYPE_CUSTOM_FIELD: |
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return array_map( 'wp_strip_all_tags', get_post_meta( $post_id, $value ) ); |
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default: |
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return $value; |
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} |
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} |
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/** |
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* Gets data from acf, format the data if it is a repeater field. |
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* |
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* @param $field_name |
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* @param $post_id |
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* |
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* @return array|mixed |
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*/ |
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public function get_data_for_acf_field( $field_name, $post_id ) { |
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$field_data = get_field_object( $field_name, $post_id ); |
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$data = get_field( $field_name, $post_id ); |
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// only process if it is a repeater field, else return the data. |
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if ( is_array( $field_data ) && array_key_exists( 'type', $field_data ) |
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&& $field_data['type'] === 'repeater' ) { |
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// check if we have only one sub field, currently we only support one subfield. |
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if ( is_array( $data ) && count( $data ) > 0 && count( array_keys( $data[0] ) === 1 ) ) { |
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$repeater_formatted_data = array(); |
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foreach ( $data as $item ) { |
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$repeater_formatted_data = array_merge( $repeater_formatted_data, array_values( $item ) ); |
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} |
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// Remove non unique values. |
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$repeater_formatted_data = array_unique( $repeater_formatted_data ); |
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// Remove empty values |
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$repeater_formatted_data = array_filter( $repeater_formatted_data, 'strlen' ); |
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// re-index all the values. |
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return array_values( $repeater_formatted_data ); |
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} |
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} |
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// Return normal acf data if it is not a repeater field. |
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return $data; |
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} |
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private function make_single( $value ) { |
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$values = (array) $value; |
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if ( empty( $values ) ) { |
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return null; |
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} |
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if ( 1 === count( $values ) && 0 === key( $values ) ) { |
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return current( $values ); |
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} |
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return $values; |
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} |
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} |
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