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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\TemplateData; |
| 4 | |
| 5 | use MediaWiki\Message\Message; |
| 6 | |
| 7 | /** |
| 8 | * Represents the information about a template, |
| 9 | * coming from the JSON blob in the <templatedata> tags |
| 10 | * on wiki pages. |
| 11 | * This implementation stores the information as a compressed gzip blob |
| 12 | * in the database. |
| 13 | * @license GPL-2.0-or-later |
| 14 | */ |
| 15 | class TemplateDataCompressedBlob extends TemplateDataBlob { |
| 16 | |
| 17 | // Size of MySQL 'blob' field; page_props table where the data is stored uses one. |
| 18 | private const MAX_LENGTH = 65535; |
| 19 | |
| 20 | /** |
| 21 | * @var string In-object cache for {@see getJSONForDatabase} |
| 22 | */ |
| 23 | private string $jsonDB; |
| 24 | |
| 25 | /** |
| 26 | * @inheritDoc |
| 27 | */ |
| 28 | protected function __construct( string $json, string $lang ) { |
| 29 | parent::__construct( $json, $lang ); |
| 30 | $this->jsonDB = gzencode( $this->json ); |
| 31 | |
| 32 | $length = strlen( $this->jsonDB ); |
| 33 | if ( $length > self::MAX_LENGTH ) { |
| 34 | $this->status->fatal( |
| 35 | 'templatedata-invalid-length', |
| 36 | Message::numParam( $length ), |
| 37 | Message::numParam( self::MAX_LENGTH ) |
| 38 | ); |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * @return string JSON (gzip compressed) |
| 44 | */ |
| 45 | public function getJSONForDatabase(): string { |
| 46 | return $this->jsonDB; |
| 47 | } |
| 48 | |
| 49 | } |