betterdocs / includes / Dependencies / DI / Definition / Resolver / EnvironmentVariableResolver.php

EnvironmentVariableResolver.php in BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot 4.5.1, at includes/Dependencies/DI/Definition/Resolver/EnvironmentVariableResolver.php

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1	<?php
2
3	declare(strict_types=1);
4
5	namespace WPDeveloper\BetterDocs\Dependencies\DI\Definition\Resolver;
6
7	use WPDeveloper\BetterDocs\Dependencies\DI\Definition\Definition;
8	use WPDeveloper\BetterDocs\Dependencies\DI\Definition\EnvironmentVariableDefinition;
9	use WPDeveloper\BetterDocs\Dependencies\DI\Definition\Exception\InvalidDefinition;
10
11	/**
12	* Resolves a environment variable definition to a value.
13	*
14	* @author James Harris <james.harris@icecave.com.au>
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 = 'getenv')
29	{
30	$this->definitionResolver = $definitionResolver;
31	$this->variableReader = $variableReader;
32	}
33
34	/**
35	* Resolve an environment variable definition to a value.
36	*
37	* @param EnvironmentVariableDefinition $definition
38	*
39	* {@inheritdoc}
40	*/
41	public function resolve(Definition $definition, array $parameters = [])
42	{
43	$value = call_user_func($this->variableReader, $definition->getVariableName());
44
45	if (false !== $value) {
46	return $value;
47	}
48
49	if (!$definition->isOptional()) {
50	throw new InvalidDefinition(sprintf(
51	"The environment variable '%s' has not been defined",
52	$definition->getVariableName()
53	));
54	}
55
56	$value = $definition->getDefaultValue();
57
58	// Nested definition
59	if ($value instanceof Definition) {
60	return $this->definitionResolver->resolve($value);
61	}
62
63	return $value;
64	}
65
66	public function isResolvable(Definition $definition, array $parameters = []) : bool
67	{
68	return true;
69	}
70	}
71