cookiebot / addons / inc / Dependencies / DI / Definition / Resolver / EnvironmentVariableResolver.php

EnvironmentVariableResolver.php in Cookiebot by Usercentrics – Automatic Cookie Banner for GDPR/CCPA & Google Consent Mode 3.11.1, at addons/inc/Dependencies/DI/Definition/Resolver/EnvironmentVariableResolver.php

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1	<?php
2	/**
3	* PHP-DI
4	*
5	* @link http://mnapoli.github.com/PHP-DI/
6	* @copyright Matthieu Napoli (http://mnapoli.fr/)
7	* @license http://www.opensource.org/licenses/mit-license.php MIT (see the LICENSE file)
8	*/
9
10	namespace Cybot\Dependencies\DI\Definition\Resolver;
11
12	use Cybot\Dependencies\DI\Definition\Definition;
13	use Cybot\Dependencies\DI\Definition\EnvironmentVariableDefinition;
14	use Cybot\Dependencies\DI\Definition\Exception\DefinitionException;
15	use Cybot\Dependencies\DI\Definition\Helper\DefinitionHelper;
16
17	/**
18	* Resolves a environment variable definition to a value.
19	*
20	* @author James Harris <[email protected]>
21	*/
22	class EnvironmentVariableResolver implements DefinitionResolver
23	{
24	/**
25	* @var DefinitionResolver
26	*/
27	private $definitionResolver;
28
29	/**
30	* @var callable
31	*/
32	private $variableReader;
33
34	public function __construct(DefinitionResolver $definitionResolver, $variableReader = 'getenv')
35	{
36	$this->definitionResolver = $definitionResolver;
37	$this->variableReader = $variableReader;
38	}
39
40	/**
41	* Resolve an environment variable definition to a value.
42	*
43	* @param EnvironmentVariableDefinition $definition
44	*
45	* {@inheritdoc}
46	*/
47	public function resolve(Definition $definition, array $parameters = [])
48	{
49	$this->assertIsEnvironmentVariableDefinition($definition);
50
51	$value = call_user_func($this->variableReader, $definition->getVariableName());
52
53	if (false !== $value) {
54	return $value;
55	} elseif (!$definition->isOptional()) {
56	throw new DefinitionException(sprintf(
57	"The environment variable '%s' has not been defined",
58	$definition->getVariableName()
59	));
60	}
61
62	$value = $definition->getDefaultValue();
63
64	// Nested definition
65	if ($value instanceof DefinitionHelper) {
66	return $this->definitionResolver->resolve($value->getDefinition(''));
67	}
68
69	return $value;
70	}
71
72	/**
73	* @param EnvironmentVariableDefinition $definition
74	*
75	* {@inheritdoc}
76	*/
77	public function isResolvable(Definition $definition, array $parameters = [])
78	{
79	$this->assertIsEnvironmentVariableDefinition($definition);
80
81	return $definition->isOptional()
82	\|\| false !== call_user_func($this->variableReader, $definition->getVariableName());
83	}
84
85	private function assertIsEnvironmentVariableDefinition(Definition $definition)
86	{
87	if (!$definition instanceof EnvironmentVariableDefinition) {
88	throw new \InvalidArgumentException(sprintf(
89	'This definition resolver is only compatible with EnvironmentVariableDefinition objects, %s given',
90	get_class($definition)
91	));
92	}
93	}
94	}
95