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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | |
| 7 | namespace MediaWiki\User\CentralId; |
| 8 | |
| 9 | use InvalidArgumentException; |
| 10 | use MediaWiki\Config\ServiceOptions; |
| 11 | use MediaWiki\MainConfigNames; |
| 12 | use MediaWiki\MainConfigSchema; |
| 13 | use MediaWiki\User\UserFactory; |
| 14 | use MediaWiki\User\UserIdentityLookup; |
| 15 | use Wikimedia\ObjectFactory\ObjectFactory; |
| 16 | |
| 17 | /** |
| 18 | * Factory class for CentralIdLookup. Creates instances based on their definitions in |
| 19 | * the CentralIdLookupProviders extension.json field. |
| 20 | * |
| 21 | * @since 1.37 |
| 22 | * @ingroup User |
| 23 | * @see CentralIdLookup |
| 24 | * @see MainConfigSchema::CentralIdLookupProviders |
| 25 | */ |
| 26 | class CentralIdLookupFactory { |
| 27 | |
| 28 | /** |
| 29 | * @internal |
| 30 | */ |
| 31 | public const CONSTRUCTOR_OPTIONS = [ |
| 32 | MainConfigNames::CentralIdLookupProviders, |
| 33 | MainConfigNames::CentralIdLookupProvider, |
| 34 | ]; |
| 35 | |
| 36 | /** @var array ObjectFactory specs indexed by provider name */ |
| 37 | private readonly array $providers; |
| 38 | |
| 39 | private readonly string $defaultProvider; |
| 40 | |
| 41 | /** @var CentralIdLookup[] */ |
| 42 | private $instanceCache = []; |
| 43 | |
| 44 | public function __construct( |
| 45 | ServiceOptions $options, |
| 46 | private readonly ObjectFactory $objectFactory, |
| 47 | private readonly UserIdentityLookup $userIdentityLookup, |
| 48 | private readonly UserFactory $userFactory, |
| 49 | ) { |
| 50 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 51 | $this->providers = $options->get( MainConfigNames::CentralIdLookupProviders ); |
| 52 | $this->defaultProvider = $options->get( MainConfigNames::CentralIdLookupProvider ); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Get the IDs of the registered central ID lookup providers. |
| 57 | * |
| 58 | * @return string[] |
| 59 | * @see MainConfigSchema::CentralIdLookupProviders |
| 60 | */ |
| 61 | public function getProviderIds(): array { |
| 62 | return array_keys( $this->providers ); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Get the ID of the default central ID provider. |
| 67 | * @see MainConfigSchema::CentralIdLookupProvider |
| 68 | */ |
| 69 | public function getDefaultProviderId(): string { |
| 70 | return $this->defaultProvider; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Get an instance of a CentralIdLookup. |
| 75 | * |
| 76 | * @param string|null $providerId Provider ID from $wgCentralIdLookupProviders or null |
| 77 | * to use the provider configured in $wgCentralIdLookupProvider |
| 78 | * @return CentralIdLookup |
| 79 | * @throws InvalidArgumentException if $providerId is not properly configured |
| 80 | */ |
| 81 | public function getLookup( ?string $providerId = null ): CentralIdLookup { |
| 82 | $providerId ??= $this->defaultProvider; |
| 83 | |
| 84 | if ( !array_key_exists( $providerId, $this->instanceCache ) ) { |
| 85 | $providerSpec = $this->providers[$providerId] ?? null; |
| 86 | if ( !$providerSpec ) { |
| 87 | throw new InvalidArgumentException( "Invalid central ID provider $providerId" ); |
| 88 | } |
| 89 | $provider = $this->objectFactory->createObject( |
| 90 | $providerSpec, |
| 91 | [ 'assertClass' => CentralIdLookup::class ] |
| 92 | ); |
| 93 | $provider->init( $providerId, $this->userIdentityLookup, $this->userFactory ); |
| 94 | $this->instanceCache[$providerId] = $provider; |
| 95 | } |
| 96 | return $this->instanceCache[$providerId]; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Returns a CentralIdLookup that is guaranteed to be non-local. |
| 101 | * If no such guarantee can be made, returns null. |
| 102 | * |
| 103 | * If this function returns a non-null CentralIdLookup, that lookup is expected to provide IDs |
| 104 | * that are shared with some set of other wikis. However, you should still be cautious |
| 105 | * when using those IDs, as they will not necessarily work with *all* other wikis, and it can be |
| 106 | * hard to tell if another wiki is in the same set as this one or not. |
| 107 | * |
| 108 | * @param string|null $providerID Provider ID from $wgCentralIdLookupProviders or null |
| 109 | * to use the provider configured in $wgCentralIdLookupProvider |
| 110 | * @return ?CentralIdLookup |
| 111 | * @throws InvalidArgumentException if $providerId is not properly configured |
| 112 | */ |
| 113 | public function getNonLocalLookup( ?string $providerID = null ): ?CentralIdLookup { |
| 114 | $centralIdLookup = $this->getLookup( $providerID ); |
| 115 | if ( $centralIdLookup instanceof LocalIdLookup ) { |
| 116 | /* |
| 117 | * A LocalIdLookup (which is the default) may actually be non-local, |
| 118 | * if shared user tables are used. |
| 119 | * However, we cannot know that here, so play it safe and refuse to return it. |
| 120 | * See also T163277 and T170996. |
| 121 | */ |
| 122 | return null; |
| 123 | } |
| 124 | return $centralIdLookup; |
| 125 | } |
| 126 | } |