8de3b7d324
This is micro-optimization of closure code to avoid binding the closure to $this where it is not needed. Created by I25a17fb22b6b669e817317a0f45051ae9c608208 Change-Id: I0ffc6200f6c6693d78a3151cb8cea7dce7c21653
419 lines
11 KiB
PHP
419 lines
11 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* Generic operation result class
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* Has warning/error list, boolean status and arbitrary value
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*
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* "Good" means the operation was completed with no warnings or errors.
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*
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* "OK" means the operation was partially or wholly completed.
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*
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* An operation which is not OK should have errors so that the user can be
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* informed as to what went wrong. Calling the fatal() function sets an error
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* message and simultaneously switches off the OK flag.
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*
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* The recommended pattern for Status objects is to return a StatusValue
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* unconditionally, i.e. both on success and on failure -- so that the
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* developer of the calling code is reminded that the function can fail, and
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* so that a lack of error-handling will be explicit.
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*
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* The use of Message objects should be avoided when serializability is needed.
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*
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* @newable
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* @since 1.25
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*/
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class StatusValue {
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/** @var bool */
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protected $ok = true;
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/** @var array[] */
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protected $errors = [];
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/** @var mixed */
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public $value;
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/** @var bool[] Map of (key => bool) to indicate success of each part of batch operations */
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public $success = [];
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/** @var int Counter for batch operations */
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public $successCount = 0;
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/** @var int Counter for batch operations */
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public $failCount = 0;
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/**
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* Factory function for fatal errors
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*
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* @param string|MessageSpecifier $message Message key or object
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* @param mixed ...$parameters
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* @return static
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*/
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public static function newFatal( $message, ...$parameters ) {
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$result = new static();
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$result->fatal( $message, ...$parameters );
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return $result;
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}
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/**
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* Factory function for good results
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*
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* @param mixed|null $value
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* @return static
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*/
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public static function newGood( $value = null ) {
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$result = new static();
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$result->value = $value;
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return $result;
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}
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/**
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* Splits this StatusValue object into two new StatusValue objects, one which contains only
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* the error messages, and one that contains the warnings, only. The returned array is
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* defined as:
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* [
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* 0 => object(StatusValue) # the StatusValue with error messages, only
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* 1 => object(StatusValue) # The StatusValue with warning messages, only
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* ]
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*
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* @return static[]
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*/
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public function splitByErrorType() {
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$errorsOnlyStatusValue = static::newGood();
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$warningsOnlyStatusValue = static::newGood();
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$warningsOnlyStatusValue->setResult( true, $this->getValue() );
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$errorsOnlyStatusValue->setResult( $this->isOK(), $this->getValue() );
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foreach ( $this->errors as $item ) {
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if ( $item['type'] === 'warning' ) {
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$warningsOnlyStatusValue->errors[] = $item;
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} else {
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$errorsOnlyStatusValue->errors[] = $item;
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}
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}
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return [ $errorsOnlyStatusValue, $warningsOnlyStatusValue ];
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}
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/**
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* Returns whether the operation completed and didn't have any error or
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* warnings
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*
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* @return bool
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*/
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public function isGood() {
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return $this->ok && !$this->errors;
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}
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/**
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* Returns whether the operation completed
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*
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* @return bool
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*/
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public function isOK() {
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return $this->ok;
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}
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/**
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* @return mixed
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*/
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public function getValue() {
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return $this->value;
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}
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/**
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* Get the list of errors
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*
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* Each error is a (message:string or MessageSpecifier,params:array) map
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*
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* @return array[]
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*/
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public function getErrors() {
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return $this->errors;
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}
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/**
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* Change operation status
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*
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* @param bool $ok
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*/
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public function setOK( $ok ) {
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$this->ok = $ok;
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}
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/**
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* Change operation result
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*
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* @param bool $ok Whether the operation completed
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* @param mixed|null $value
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*/
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public function setResult( $ok, $value = null ) {
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$this->ok = (bool)$ok;
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$this->value = $value;
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}
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/**
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* Add a new error to the error array ($this->errors) if that error is not already in the
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* error array. Each error is passed as an array with the following fields:
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*
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* - type: 'error' or 'warning'
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* - message: a string (message key) or MessageSpecifier
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* - params: an array of string parameters
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*
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* If the new error is of type 'error' and it matches an existing error of type 'warning',
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* the existing error is upgraded to type 'error'. An error provided as a MessageSpecifier
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* will successfully match an error provided as the same string message key and array of
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* parameters as separate array elements.
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*
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* @param array $newError
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*/
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private function addError( array $newError ) {
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if ( $newError[ 'message' ] instanceof MessageSpecifier ) {
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$isEqual = static function ( $existingError ) use ( $newError ) {
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if ( $existingError['message'] instanceof MessageSpecifier ) {
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// compare attributes of both MessageSpecifiers
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return $newError['message'] == $existingError['message'];
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} else {
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return $newError['message']->getKey() === $existingError['message'] &&
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$newError['message']->getParams() === $existingError['params'];
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}
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};
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} else {
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$isEqual = static function ( $existingError ) use ( $newError ) {
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if ( $existingError['message'] instanceof MessageSpecifier ) {
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return $newError['message'] === $existingError['message']->getKey() &&
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$newError['params'] === $existingError['message']->getParams();
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} else {
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return $newError['message'] === $existingError['message'] &&
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$newError['params'] === $existingError['params'];
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}
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};
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}
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foreach ( $this->errors as $index => $existingError ) {
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if ( $isEqual( $existingError ) ) {
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if ( $newError[ 'type' ] === 'error' && $existingError[ 'type' ] === 'warning' ) {
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$this->errors[ $index ][ 'type' ] = 'error';
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}
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return;
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}
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}
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$this->errors[] = $newError;
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}
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/**
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* Add a new warning
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*
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* @param string|MessageSpecifier $message Message key or object
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* @param mixed ...$parameters
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*/
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public function warning( $message, ...$parameters ) {
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$this->addError( [
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'type' => 'warning',
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'message' => $message,
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'params' => $parameters
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] );
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}
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/**
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* Add an error, do not set fatal flag
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* This can be used for non-fatal errors
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*
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* @param string|MessageSpecifier $message Message key or object
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* @param mixed ...$parameters
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*/
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public function error( $message, ...$parameters ) {
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$this->addError( [
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'type' => 'error',
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'message' => $message,
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'params' => $parameters
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] );
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}
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/**
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* Add an error and set OK to false, indicating that the operation
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* as a whole was fatal
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*
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* @param string|MessageSpecifier $message Message key or object
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* @param mixed ...$parameters
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*/
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public function fatal( $message, ...$parameters ) {
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$this->error( $message, ...$parameters );
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$this->ok = false;
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}
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/**
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* Merge another status object into this one
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*
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* @param StatusValue $other
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* @param bool $overwriteValue Whether to override the "value" member
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*/
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public function merge( $other, $overwriteValue = false ) {
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foreach ( $other->errors as $error ) {
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$this->addError( $error );
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}
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$this->ok = $this->ok && $other->ok;
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if ( $overwriteValue ) {
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$this->value = $other->value;
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}
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$this->successCount += $other->successCount;
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$this->failCount += $other->failCount;
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}
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/**
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* Returns a list of status messages of the given type
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*
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* Each entry is a map of:
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* - message: string message key or MessageSpecifier
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* - params: array list of parameters
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*
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* @param string $type
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* @return array[]
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*/
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public function getErrorsByType( $type ) {
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$result = [];
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foreach ( $this->errors as $error ) {
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if ( $error['type'] === $type ) {
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$result[] = $error;
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}
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}
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return $result;
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}
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/**
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* Returns true if the specified message is present as a warning or error
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*
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* @param string|MessageSpecifier $message Message key or object to search for
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*
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* @return bool
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*/
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public function hasMessage( $message ) {
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if ( $message instanceof MessageSpecifier ) {
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$message = $message->getKey();
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}
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foreach ( $this->errors as $error ) {
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if ( $error['message'] instanceof MessageSpecifier
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&& $error['message']->getKey() === $message
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) {
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return true;
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} elseif ( $error['message'] === $message ) {
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return true;
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}
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}
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return false;
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}
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/**
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* If the specified source message exists, replace it with the specified
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* destination message, but keep the same parameters as in the original error.
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*
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* Note, due to the lack of tools for comparing IStatusMessage objects, this
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* function will not work when using such an object as the search parameter.
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*
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* @param MessageSpecifier|string $source Message key or object to search for
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* @param MessageSpecifier|string $dest Replacement message key or object
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* @return bool Return true if the replacement was done, false otherwise.
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*/
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public function replaceMessage( $source, $dest ) {
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$replaced = false;
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foreach ( $this->errors as $index => $error ) {
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if ( $error['message'] === $source ) {
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$this->errors[$index]['message'] = $dest;
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$replaced = true;
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}
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}
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return $replaced;
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}
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/**
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* @return string
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*/
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public function __toString() {
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$status = $this->isOK() ? "OK" : "Error";
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if ( count( $this->errors ) ) {
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$errorcount = "collected " . ( count( $this->errors ) ) . " error(s) on the way";
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} else {
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$errorcount = "no errors detected";
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}
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if ( isset( $this->value ) ) {
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$valstr = gettype( $this->value ) . " value set";
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if ( is_object( $this->value ) ) {
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$valstr .= "\"" . get_class( $this->value ) . "\" instance";
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}
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} else {
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$valstr = "no value set";
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}
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$out = sprintf( "<%s, %s, %s>",
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$status,
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$errorcount,
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$valstr
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);
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if ( count( $this->errors ) > 0 ) {
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$hdr = sprintf( "+-%'-4s-+-%'-25s-+-%'-40s-+\n", "", "", "" );
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$i = 1;
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$out .= "\n";
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$out .= $hdr;
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foreach ( $this->errors as $error ) {
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if ( $error['message'] instanceof MessageSpecifier ) {
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$key = $error['message']->getKey();
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$params = $error['message']->getParams();
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} elseif ( $error['params'] ) {
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$key = $error['message'];
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$params = $error['params'];
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} else {
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$key = $error['message'];
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$params = [];
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}
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$out .= sprintf( "| %4d | %-25.25s | %-40.40s |\n",
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$i,
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$key,
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self::flattenParams( $params )
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);
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$i += 1;
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}
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$out .= $hdr;
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}
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return $out;
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}
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/**
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* @param array $params Message parameters
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* @return string String representation
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*/
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private function flattenParams( array $params ) : string {
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$ret = [];
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foreach ( $params as $p ) {
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if ( is_array( $p ) ) {
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$ret[] = '[ ' . self::flattenParams( $p ) . ' ]';
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} elseif ( $p instanceof MessageSpecifier ) {
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$ret[] = '{ ' . $p->getKey() . ': ' . self::flattenParams( $p->getParams() ) . ' }';
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} else {
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$ret[] = (string)$p;
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}
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}
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return implode( ' ', $ret );
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}
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}
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