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| <?php declare(strict_types = 1); | |
| /* | |
| * Copyright (c) 2019, Josef Kufner <josef@kufner.cz> | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| * | |
| */ | |
| namespace Smalldb\Graph; | |
| abstract class AbstractElement implements \ArrayAccess | |
| { | |
| private array $attrs; | |
| public function __construct(array $attrs = []) | |
| { | |
| $this->attrs = $attrs; | |
| } | |
| public function offsetSet($key, $value) | |
| { | |
| return $this->setAttr($key, $value); | |
| } | |
| public function & offsetGet($key) | |
| { | |
| return $this->attrs[$key]; | |
| } | |
| public function getAttr(string $key, $defaultValue = null) | |
| { | |
| return $this->attrs[$key] ?? $defaultValue; | |
| } | |
| public function offsetUnset($key) | |
| { | |
| $this->removeAttr($key); | |
| } | |
| /** | |
| * @return $this | |
| */ | |
| public function setAttr(string $key, $newValue) | |
| { | |
| $oldValue = $this->attrs[$key] ?? null; | |
| $this->attrs[$key] = $newValue; | |
| $this->onAttrChanged($key, $oldValue, $newValue); | |
| return $this; | |
| } | |
| /** | |
| * @return $this | |
| */ | |
| public function removeAttr(string $key) | |
| { | |
| $this->setAttr($key, null); | |
| unset($this->attrs[$key]); | |
| return $this; | |
| } | |
| public function offsetExists($key) | |
| { | |
| return isset($this->attrs[$key]); | |
| } | |
| public function getAttributes(): array | |
| { | |
| return $this->attrs; | |
| } | |
| abstract protected function onAttrChanged(string $key, $oldValue, $newValue); | |
| } |