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Vincent Chalnot
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New transformers: constant and expression_language_map
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3 files changed

+194
-10
lines changed

3 files changed

+194
-10
lines changed

‎Resources/config/services/transformer.yml‎

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services:
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CleverAge\ProcessBundle\Transformer\:
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resource: '../../../Transformer/*'
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exclude: '../../../Transformer/GenericTransformer.php'
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_defaults:
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autowire: true
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public: false
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tags:
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- { name: cleverage.transformer }
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- { name: monolog.logger, channel: cleverage_process_transformer }
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CleverAge\ProcessBundle\Transformer\RulesTransformer:
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arguments:
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$transformerRegistry: '@CleverAge\ProcessBundle\Registry\TransformerRegistry'
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bind:
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$language: '@cleverage_process.expression_language'
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CleverAge\ProcessBundle\Transformer\:
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resource: '../../../Transformer/*'
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exclude: '../../../Transformer/GenericTransformer.php'
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tags:
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- { name: cleverage.transformer }
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- { name: monolog.logger, channel: cleverage_process_transformer }

‎Transformer/ConstantTransformer.php‎

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<?php declare(strict_types=1);
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/*
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* This file is part of the CleverAge/ProcessBundle package.
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*
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* Copyright (C) 2017-2019 Clever-Age
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace CleverAge\ProcessBundle\Transformer;
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use Symfony\Component\OptionsResolver\Exception\ExceptionInterface;
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use Symfony\Component\OptionsResolver\OptionsResolver;
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/**
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* Return always the same value configured in options, redundant when used inside mapping except in certain useful
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* circumstances
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*
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* @author Vincent Chalnot <[email protected]>
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*/
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class ConstantTransformer implements ConfigurableTransformerInterface
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{
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/**
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* @param OptionsResolver $resolver
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*
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* @throws ExceptionInterface
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*/
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public function configureOptions(OptionsResolver $resolver): void
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{
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$resolver->setRequired(
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[
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'constant',
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]
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);
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}
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/**
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* Must return the transformed $value
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*
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* @param mixed $value
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* @param array $options
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*
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* @return mixed $value
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*/
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public function transform($value, array $options = [])
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{
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return $options['constant'] ?? null;
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}
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/**
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* Returns the unique code to identify the transformer
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*
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* @return string
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*/
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public function getCode(): string
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{
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return 'constant';
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}
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}

‎Transformer/ExpressionLanguageMapTransformer.php‎

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<?php declare(strict_types=1);
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/*
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* This file is part of the CleverAge/ProcessBundle package.
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*
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* Copyright (C) 2017-2019 Clever-Age
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace CleverAge\ProcessBundle\Transformer;
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use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
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use Symfony\Component\OptionsResolver\Exception\ExceptionInterface;
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use Symfony\Component\OptionsResolver\Options;
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use Symfony\Component\OptionsResolver\OptionsResolver;
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/**
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* Parse an input using the Expression Language and returning a specific value upon a specific condition
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*
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* @author Vincent Chalnot <[email protected]>
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*/
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class ExpressionLanguageMapTransformer implements ConfigurableTransformerInterface
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{
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/** @var ExpressionLanguage */
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protected $language;
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/**
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* @param ExpressionLanguage $language
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*/
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public function __construct(ExpressionLanguage $language)
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{
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$this->language = $language;
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}
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/**
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* @param OptionsResolver $resolver
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*
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* @throws ExceptionInterface
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*/
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public function configureOptions(OptionsResolver $resolver): void
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{
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$resolver->setRequired(
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[
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'map',
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]
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);
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$resolver->setAllowedTypes('map', ['array']);
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$resolver->setDefaults(
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[
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'ignore_missing' => false,
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'keep_missing' => false,
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]
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);
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$resolver->setAllowedTypes('ignore_missing', ['boolean']);
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$resolver->setAllowedTypes('keep_missing', ['boolean']);
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$resolver->setNormalizer(
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'map',
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function (Options $options, $values) {
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if (!is_array($values)) {
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throw new \UnexpectedValueException('The map must be an array');
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}
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$resolver = new OptionsResolver();
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$resolver->setRequired(
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[
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'condition',
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'output',
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]
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);
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$resolver->setNormalizer(
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'condition',
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function (Options $options, $value) {
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return $this->language->parse($value, ['data']);
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}
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);
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$resolver->setNormalizer(
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'output',
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function (Options $options, $value) {
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return $this->language->parse($value, ['data']);
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}
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);
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$parsedValues = [];
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foreach ($values as $value) {
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$parsedValues[] = $resolver->resolve($value);
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}
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return $parsedValues;
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}
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);
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}
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/**
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* Must return the transformed $value
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*
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* @param mixed $value
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* @param array $options
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*
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* @return mixed $value
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*/
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public function transform($value, array $options = [])
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{
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$input = ['data' => $value];
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foreach ($options['map'] as $mapItem) {
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if ($this->language->evaluate($mapItem['condition'], $input)) {
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return $this->language->evaluate($mapItem['output'], $input);
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}
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}
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if ($options['keep_missing']) {
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return $value;
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}
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if (!$options['ignore_missing']) {
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throw new \UnexpectedValueException("No expression accepting value '{$value}' in map");
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}
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return null;
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}
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/**
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* Returns the unique code to identify the transformer
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*
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* @return string
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*/
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public function getCode(): string
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{
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return 'expression_language_map';
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}
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}

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