95 lines
2.9 KiB
PHP
95 lines
2.9 KiB
PHP
<?php
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/**
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* PHP Basics
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*
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* Copyright (C) 2024 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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declare(strict_types=1);
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namespace OCC\Basics\Traits;
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use InvalidArgumentException;
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use function boolval;
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use function method_exists;
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use function property_exists;
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use function sprintf;
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use function ucfirst;
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/**
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* Reads data from inaccessible properties by using magic methods.
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*
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* To make a `protected` or `private` property readable, provide a method named
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* `_magicGet{Property}()` which handles the reading. Replace `{Property}` in
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* the method's name with the name of the actual property (with an uppercase
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* first letter).
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*
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* > Example: If the property is named `$fooBar`, the "magic" method has to be
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* > `_magicGetFooBar()`. This method is then called when `$fooBar` is read in
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* > a context where it normally would not be accessible.
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*
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* @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
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* @package Basics\Traits
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*/
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trait Getter
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{
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/**
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* Read data from an inaccessible property.
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*
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* @param string $property The class property to get
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*
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* @return mixed The class property's current value
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*
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* @throws InvalidArgumentException if the property or getter method do not exist
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*/
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public function __get(string $property): mixed
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{
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$method = '_magicGet' . ucfirst($property);
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if (property_exists(static::class, $property) && method_exists(static::class, $method)) {
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return $this->$method();
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} else {
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throw new InvalidArgumentException(
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sprintf(
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'Invalid property or missing getter method for property: %s::$%s.',
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static::class,
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$property
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)
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);
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}
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}
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/**
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* Check if an inaccessible property is set and not empty.
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*
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* @param string $property The class property to check
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*
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* @return bool Whether the class property is set and not empty
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*/
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public function __isset(string $property): bool
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{
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try {
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/** @var mixed $value */
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$value = $this->__get($property);
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} catch (InvalidArgumentException) {
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$value = null;
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} finally {
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return boolval($value ?? null) !== false;
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}
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}
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}
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