xref: /webtrees/app/Container.php (revision d35568b467207589ea9059739da0bf1f7e785a0d) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2023 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees;
21
22use Fisharebest\Webtrees\Contracts\ContainerInterface;
23use Fisharebest\Webtrees\Exceptions\NotFoundInContainerException;
24use ReflectionClass;
25use ReflectionNamedType;
26use ReflectionParameter;
27
28use function array_key_exists;
29use function array_map;
30
31/**
32 * @template T of object
33 *
34 * A PSR-11 compatible container and dependency injector.
35 */
36class Container implements ContainerInterface
37{
38    /** @var array<class-string<T>,T> */
39    private array $container = [];
40
41    /**
42     * @param class-string<T> $id
43     *
44     * @return bool
45     */
46    public function has(string $id): bool
47    {
48        return array_key_exists($id, $this->container);
49    }
50
51    /**
52     * @param class-string<T> $id
53     *
54     * @return T
55     */
56    public function get(string $id): object
57    {
58        return $this->container[$id] ??= $this->make($id);
59    }
60
61    /**
62     * @param class-string<T> $id
63     * @param T               $object
64     *
65     * @return $this
66     */
67    public function set(string $id, object $object): static
68    {
69        $this->container[$id] = $object;
70
71        return $this;
72    }
73
74    /**
75     * @param class-string<T> $id
76     *
77     * @return T
78     */
79    private function make(string $id): object
80    {
81        $reflector   = new ReflectionClass($id);
82        $constructor = $reflector->getConstructor();
83
84        if ($constructor === null) {
85            return new $id();
86        }
87
88        $parameters = array_map(self::makeParameter(...), $constructor->getParameters());
89
90        return new $id(...$parameters);
91    }
92
93    private function makeParameter(ReflectionParameter $reflection_parameter): mixed
94    {
95        if ($reflection_parameter->isOptional()) {
96            return $reflection_parameter->getDefaultValue();
97        }
98
99        $type = $reflection_parameter->getType();
100
101        if ($type instanceof ReflectionNamedType) {
102            return $this->get($type->getName());
103        }
104
105        throw new NotFoundInContainerException('Cannot make ' . $reflection_parameter->getName());
106    }
107}
108