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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\Purtle; |
| 4 | |
| 5 | /** |
| 6 | * Base class for RdfWriter implementations that output an N3 dialect. |
| 7 | * |
| 8 | * @license GPL-2.0-or-later |
| 9 | * @author Daniel Kinzler |
| 10 | */ |
| 11 | abstract class N3RdfWriterBase extends RdfWriterBase { |
| 12 | |
| 13 | /** |
| 14 | * @var N3Quoter |
| 15 | */ |
| 16 | protected $quoter; |
| 17 | |
| 18 | /** |
| 19 | * @param string $role |
| 20 | * @param BNodeLabeler|null $labeler |
| 21 | * @param N3Quoter|null $quoter |
| 22 | */ |
| 23 | public function __construct( |
| 24 | $role = parent::DOCUMENT_ROLE, |
| 25 | ?BNodeLabeler $labeler = null, |
| 26 | ?N3Quoter $quoter = null |
| 27 | ) { |
| 28 | parent::__construct( $role, $labeler ); |
| 29 | |
| 30 | $this->quoter = $quoter ?: new N3Quoter(); |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * @param string $base |
| 35 | * @param string|null $local |
| 36 | */ |
| 37 | protected function writeRef( $base, $local = null ) { |
| 38 | if ( $local === null ) { |
| 39 | if ( $base === 'a' ) { |
| 40 | $this->write( 'a' ); |
| 41 | } else { |
| 42 | $this->writeIRI( $base ); |
| 43 | } |
| 44 | } else { |
| 45 | $this->write( "$base:$local" ); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * @param string $iri |
| 51 | * @param bool $trustIRI |
| 52 | */ |
| 53 | protected function writeIRI( $iri, $trustIRI = false ) { |
| 54 | if ( !$trustIRI ) { |
| 55 | $iri = $this->quoter->escapeIRI( $iri ); |
| 56 | } |
| 57 | $this->write( "<$iri>" ); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * @inheritDoc |
| 62 | */ |
| 63 | protected function writeText( $text, $language = null ) { |
| 64 | $value = $this->quoter->escapeLiteral( $text ); |
| 65 | $this->write( '"' . $value . '"' ); |
| 66 | |
| 67 | if ( $this->isValidLanguageCode( $language ) ) { |
| 68 | $this->write( '@' . $language ); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * @param string $value |
| 74 | * @param string|null $typeBase |
| 75 | * @param string|null $typeLocal |
| 76 | */ |
| 77 | protected function writeValue( $value, $typeBase, $typeLocal = null ) { |
| 78 | $value = $this->quoter->escapeLiteral( $value ); |
| 79 | $this->write( '"' . $value . '"' ); |
| 80 | |
| 81 | if ( $typeBase !== null ) { |
| 82 | $this->write( '^^' ); |
| 83 | $this->writeRef( $typeBase, $typeLocal ); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | } |