TemplateDataCompressedBlob.php
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TemplateDataCompressedBlob.php
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	<?php

	namespace MediaWiki\Extension\TemplateData;

	use MediaWiki\Message\Message;

	/**
	* Represents the information about a template,
	* coming from the JSON blob in the <templatedata> tags
	* on wiki pages.
	* This implementation stores the information as a compressed gzip blob
	* in the database.
	* @license GPL-2.0-or-later
	*/
	class TemplateDataCompressedBlob extends TemplateDataBlob {

	// Size of MySQL 'blob' field; page_props table where the data is stored uses one.
	private const MAX_LENGTH = 65535;

	/**
	* @var string In-object cache for {@see getJSONForDatabase}
	*/
	private string $jsonDB;

	/**
	* @inheritDoc
	*/
	protected function __construct( string $json, string $lang ) {
	parent::__construct( $json, $lang );
	$this->jsonDB = gzencode( $this->json );

	$length = strlen( $this->jsonDB );
	if ( $length > self::MAX_LENGTH ) {
	$this->status->fatal(
	'templatedata-invalid-length',
	Message::numParam( $length ),
	Message::numParam( self::MAX_LENGTH )
	);
	}
	}

	/**
	* @return string JSON (gzip compressed)
	*/
	public function getJSONForDatabase(): string {
	return $this->jsonDB;
	}

	}