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<?php
if ( !class_exists('Puc_v4p6_Metadata', false) ):
/**
* A base container for holding information about updates and plugin metadata.
*
* @author Janis Elsts
* @copyright 2016
* @access public
*/
abstract class Puc_v4p6_Metadata {
/**
* Create an instance of this class from a JSON document.
*
* @abstract
* @param string $json
* @return self
*/
public static function fromJson(/** @noinspection PhpUnusedParameterInspection */ $json) {
throw new LogicException('The ' . __METHOD__ . ' method must be implemented by subclasses');
}
/**
* @param string $json
* @param self $target
* @return bool
*/
protected static function createFromJson($json, $target) {
/** @var StdClass $apiResponse */
$apiResponse = json_decode($json);
if ( empty($apiResponse) || !is_object($apiResponse) ){
$errorMessage = "Failed to parse update metadata. Try validating your .json file with http://jsonlint.com/";
do_action('puc_api_error', new WP_Error('puc-invalid-json', $errorMessage));
trigger_error($errorMessage, E_USER_NOTICE);
return false;
}
foreach(get_object_vars($apiResponse) as $key => $value){
$target->$key = $value;
}
return true;
}
/**
* No validation by default! Subclasses should check that the required fields are present.
*
* @param StdClass $apiResponse
* @return bool|WP_Error
*/
protected function validateMetadata(/** @noinspection PhpUnusedParameterInspection */ $apiResponse) {
return true;
}
/**
* Create a new instance by copying the necessary fields from another object.
*
* @abstract
* @param StdClass|self $object The source object.
* @return self The new copy.
*/
public static function fromObject(/** @noinspection PhpUnusedParameterInspection */ $object) {
throw new LogicException('The ' . __METHOD__ . ' method must be implemented by subclasses');
}
/**
* Create an instance of StdClass that can later be converted back to an
* update or info container. Useful for serialization and caching, as it
* avoids the "incomplete object" problem if the cached value is loaded
* before this class.
*
* @return StdClass
*/
public function toStdClass() {
$object = new stdClass();
$this->copyFields($this, $object);
return $object;
}
/**
* Transform the metadata into the format used by WordPress core.
*
* @return object
*/
abstract public function toWpFormat();
/**
* Copy known fields from one object to another.
*
* @param StdClass|self $from
* @param StdClass|self $to
*/
protected function copyFields($from, $to) {
$fields = $this->getFieldNames();
if ( property_exists($from, 'slug') && !empty($from->slug) ) {
//Let plugins add extra fields without having to create subclasses.
$fields = apply_filters($this->getPrefixedFilter('retain_fields') . '-' . $from->slug, $fields);
}
foreach ($fields as $field) {
if ( property_exists($from, $field) ) {
$to->$field = $from->$field;
}
}
}
/**
* @return string[]
*/
protected function getFieldNames() {
return array();
}
/**
* @param string $tag
* @return string
*/
protected function getPrefixedFilter($tag) {
return 'puc_' . $tag;
}
}
endif;