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‎.gitignore‎

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/.idea
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/composer.lock
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/composer.phar
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/vendor

‎Extension/LambdaExtension.php‎

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<?php
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/**
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* This file is part of TwigLambda
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*
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* (c) Damian Polac <damian.polac.111@gmail.com>
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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 DPolac\TwigLambda\Extension;
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use Underscore\Types\Arrays;
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class LambdaExtension extends \Twig_Extension
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{
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public function getOperators()
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{
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return [
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[
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'=>' => [
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'precedence' => 0,
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'class' => '\DPolac\TwigLambda\NodeExpression\Lambda'
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],
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],
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[]
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];
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}
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public function getFunctions()
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{
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return [
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new \Twig_SimpleFunction('call', [$this, 'call']),
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];
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}
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public function getTests()
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{
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return [
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new \Twig_SimpleTest('all', '\Underscore\Types\Arrays::matches'),
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new \Twig_SimpleTest('every', '\Underscore\Types\Arrays::matches'),
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new \Twig_SimpleTest('any', [$this, 'any']),
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new \Twig_SimpleTest('some', [$this, 'any']),
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];
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}
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public function getFilters()
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{
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return [
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new \Twig_SimpleFilter('map', '\Underscore\Types\Arrays::each'),
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new \Twig_SimpleFilter('each', '\Underscore\Types\Arrays::each'),
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new \Twig_SimpleFilter('select', '\Underscore\Types\Arrays::each'),
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new \Twig_SimpleFilter('filter', '\Underscore\Types\Arrays::filter'),
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new \Twig_SimpleFilter('where', '\Underscore\Types\Arrays::filter'),
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new \Twig_SimpleFilter('unique', 'array_unique'),
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new \Twig_SimpleFilter('groupBy', '\Underscore\Types\Arrays::group'),
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new \Twig_SimpleFilter('sortBy', '\Underscore\Types\Arrays::sort'),
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new \Twig_SimpleFilter('countBy', [$this, 'countBy']),
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];
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}
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public function countBy(array $array, $callback)
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{
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$result = [];
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foreach ($array as $element) {
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$key = $callback($element);
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if (is_bool($key)) {
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$key = $key ? 'true' : 'false';
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} elseif (is_null($key)) {
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$key = 'null';
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}
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if (!isset($result[$key])) {
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$result[$key] = 1;
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} else {
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++$result[$key];
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}
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}
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return $result;
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}
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public function any(array $array, $callback)
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{
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if (!is_callable($callback)) {
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throw new \InvalidArgumentException(
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'Second argument of any must be callable.');
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}
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if (count($array) === 0) {
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return false;
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}
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return Arrays::matchesAny($array, $callback);
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}
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public function call($callback, array $args = [])
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{
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if (!is_callable($callback)) {
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throw new \InvalidArgumentException('First argument must be callable.');
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}
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return call_user_func_array($callback, $args);
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}
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public function getName()
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{
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return 'dpolac_lambda_extension';
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}
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}

‎LICENSE‎

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The MIT License (MIT)
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Copyright (c) 2016 Damian Połać
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎NodeExpression/Lambda.php‎

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<?php
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/**
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* This file is part of TwigLambda
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*
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* (c) Damian Polac <damian.polac.111@gmail.com>
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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 DPolac\TwigLambda\NodeExpression;
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class Lambda extends \Twig_Node_Expression
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{
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public function __construct(\Twig_Node $node, $lineno)
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{
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parent::__construct(array('node' => $node), array(), $lineno);
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}
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public function compile(\Twig_Compiler $compiler)
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{
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$compiler->raw("\n");
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$compiler->indent();
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$compiler->addIndentation();
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$compiler->raw("function() use(&\$context) {\n");
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$compiler->indent();
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// copy of _ and __ from context
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$compiler->addIndentation();
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$compiler->raw("if (isset(\$context['_'])) \$outer_ = \$context['_'];\n");
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$compiler->addIndentation();
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$compiler->raw("if (isset(\$context['__'])) \$outer__ = \$context['__'];\n");
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// adding closure's arguments to context
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$compiler->addIndentation();
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$compiler->raw("\$context['__'] = func_get_args();\n");
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$compiler->addIndentation();
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$compiler->raw("if (func_num_args()>0) \$context['_'] = func_get_arg(0);\n");
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$compiler->addIndentation();
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$compiler->raw("else unset(\$context['_']);\n");
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// getting call result
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$compiler->addIndentation();
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$compiler->raw("\$result = ");
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$compiler->subcompile($this->getNode('node'));
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$compiler->raw(";\n");
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// recreating original context
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$compiler->addIndentation();
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$compiler->raw("if (isset(\$outer_)) \$context['_'] = \$outer_ ;\n");
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$compiler->addIndentation();
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$compiler->raw("else unset(\$context['_']);\n");
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$compiler->addIndentation();
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$compiler->raw("if (isset(\$outer__)) \$context['__'] = \$outer__ ;\n");
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$compiler->addIndentation();
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$compiler->raw("else unset(\$context['__']);\n");
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// return statement
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$compiler->addIndentation();
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$compiler->raw("return \$result;");
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$compiler->outdent();
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$compiler->addIndentation();
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$compiler->raw("}\n");
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$compiler->outdent();
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$compiler->addIndentation();
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}
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}

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