ivyforms / backend / vendor / php-di / php-di / src / Definition / Resolver / EnvironmentVariableResolver.php

EnvironmentVariableResolver.php in The Innovative Form Builder – IvyForms 0.2, at backend/vendor/php-di/php-di/src/Definition/Resolver/EnvironmentVariableResolver.php

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1	<?php
2
3	declare(strict_types=1);
4
5	namespace DI\Definition\Resolver;
6
7	use DI\Definition\Definition;
8	use DI\Definition\EnvironmentVariableDefinition;
9	use DI\Definition\Exception\InvalidDefinition;
10
11	/**
12	* Resolves a environment variable definition to a value.
13	*
14	* @author James Harris <[email protected]>
15	*/
16	class EnvironmentVariableResolver implements DefinitionResolver
17	{
18	/**
19	* @var DefinitionResolver
20	*/
21	private $definitionResolver;
22
23	/**
24	* @var callable
25	*/
26	private $variableReader;
27
28	public function __construct(DefinitionResolver $definitionResolver, $variableReader = null)
29	{
30	$this->definitionResolver = $definitionResolver;
31	$this->variableReader = $variableReader ?? [$this, 'getEnvVariable'];
32	}
33
34	/**
35	* Resolve an environment variable definition to a value.
36	*
37	* @param EnvironmentVariableDefinition $definition
38	*/
39	public function resolve(Definition $definition, array $parameters = [])
40	{
41	$value = call_user_func($this->variableReader, $definition->getVariableName());
42
43	if (false !== $value) {
44	return $value;
45	}
46
47	if (!$definition->isOptional()) {
48	throw new InvalidDefinition(sprintf(
49	"The environment variable '%s' has not been defined",
50	$definition->getVariableName()
51	));
52	}
53
54	$value = $definition->getDefaultValue();
55
56	// Nested definition
57	if ($value instanceof Definition) {
58	return $this->definitionResolver->resolve($value);
59	}
60
61	return $value;
62	}
63
64	public function isResolvable(Definition $definition, array $parameters = []) : bool
65	{
66	return true;
67	}
68
69	protected function getEnvVariable(string $variableName)
70	{
71	if (isset($_ENV[$variableName])) {
72	return $_ENV[$variableName];
73	} elseif (isset($_SERVER[$variableName])) {
74	return $_SERVER[$variableName];
75	}
76
77	return getenv($variableName);
78	}
79	}
80