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<?php |
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/** |
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* This file is part of byrokrat\autogiro. |
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* |
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* byrokrat\autogiro is free software: you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* byrokrat\autogiro 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 |
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* along with byrokrat\autogiro. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* Copyright 2016-18 Hannes Forsgård |
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*/ |
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declare(strict_types = 1); |
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namespace byrokrat\autogiro\Visitor; |
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use byrokrat\autogiro\Tree\Node; |
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/** |
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* Visitor that dynamically calls method based on node name and type |
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* |
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* Will read the node name and type (eg. SomeNode) and dispatch a node specific |
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* method if defined in visitor (eg. beforeSomeNode or afterSomeNode). |
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*/ |
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class Visitor implements VisitorInterface |
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{ |
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private const AFTER = 'after'; |
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private const BEFORE = 'before'; |
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/** |
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* @var array |
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*/ |
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private $hooks = [ |
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self::AFTER => [], |
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self::BEFORE => [], |
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]; |
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public function after(string $name, callable $hook): void |
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{ |
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$this->hooks[self::AFTER][strtolower($name)] = $hook; |
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} |
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public function before(string $name, callable $hook): void |
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{ |
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$this->hooks[self::BEFORE][strtolower($name)] = $hook; |
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} |
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public function visitAfter(Node $node): void |
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{ |
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$this->visit(self::AFTER, $node); |
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} |
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public function visitBefore(Node $node): void |
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{ |
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$this->visit(self::BEFORE, $node); |
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} |
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private function visit(string $prefix, Node $node): void |
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{ |
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if ($node->getName()) { |
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$this->dispatch($prefix, $node->getName(), $node); |
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} |
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if ($node->getType() && $node->getType() != $node->getName()) { |
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$this->dispatch($prefix, $node->getType(), $node); |
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} |
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} |
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private function dispatch(string $prefix, string $name, Node $node): void |
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{ |
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($this->hooks[$prefix][strtolower($name)] ?? function () {})($node); // phpcs:ignore |
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$method = $prefix . $name; |
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if (method_exists($this, $method)) { |
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$this->$method($node); |
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} |
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} |
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} |
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byrokrat /
autogiro
