MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / vendor / wikimedia / purtle / src / TurtleRdfWriter.php

diff --git a/vendor/wikimedia/purtle/src/TurtleRdfWriter.php b/vendor/wikimedia/purtle/src/TurtleRdfWriter.php
new file mode 100644 (file)
index 0000000..43e5ae4
--- /dev/null
+++ b/vendor/wikimedia/purtle/src/TurtleRdfWriter.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Wikimedia\Purtle;
+
+/**
+ * RdfWriter implementation for generating Turtle output.
+ *
+ * @license GPL-2.0+
+ * @author Daniel Kinzler
+ */
+class TurtleRdfWriter extends N3RdfWriterBase {
+       /**
+        * @var bool
+        */
+       private $trustIRIs = true;
+
+       /**
+        * @return bool
+        */
+       public function getTrustIRIs() {
+               return $this->trustIRIs;
+       }
+
+       /**
+        * @param bool $trustIRIs
+        */
+       public function setTrustIRIs( $trustIRIs ) {
+               $this->trustIRIs = $trustIRIs;
+       }
+
+       public function __construct(
+               $role = parent::DOCUMENT_ROLE,
+               BNodeLabeler $labeler = null,
+               N3Quoter $quoter = null
+       ) {
+               parent::__construct( $role, $labeler, $quoter );
+               $this->transitionTable[self::STATE_OBJECT] = [
+                       self::STATE_DOCUMENT => " .\n",
+                       self::STATE_SUBJECT => " .\n\n",
+                       self::STATE_PREDICATE => " ;\n\t",
+                       self::STATE_OBJECT => ",\n\t\t",
+               ];
+               $this->transitionTable[self::STATE_DOCUMENT][self::STATE_SUBJECT] = "\n";
+               $this->transitionTable[self::STATE_SUBJECT][self::STATE_PREDICATE] = ' ';
+               $this->transitionTable[self::STATE_PREDICATE][self::STATE_OBJECT] = ' ';
+               $this->transitionTable[self::STATE_START][self::STATE_DOCUMENT] = function () {
+                       $this->beginDocument();
+               };
+       }
+
+       /**
+        * Write prefixes
+        */
+       private function beginDocument() {
+               foreach ( $this->getPrefixes() as $prefix => $uri ) {
+                       $this->write( "@prefix $prefix: <" . $this->quoter->escapeIRI( $uri ) . "> .\n" );
+               }
+       }
+
+       protected function writeSubject( $base, $local = null ) {
+               if ( $local !== null ) {
+                       $this->write( "$base:$local" );
+               } else {
+                       $this->writeIRI( $base, $this->trustIRIs );
+               }
+       }
+
+       protected function writePredicate( $base, $local = null ) {
+               if ( $base === 'a' ) {
+                       $this->write( 'a' );
+                       return;
+               }
+               if ( $local !== null ) {
+                       $this->write( "$base:$local" );
+               } else {
+                       $this->writeIRI( $base, $this->trustIRIs );
+               }
+       }
+
+       protected function writeResource( $base, $local = null ) {
+               if ( $local !== null ) {
+                       $this->write( "$base:$local" );
+               } else {
+                       $this->writeIRI( $base );
+               }
+       }
+
+       /**
+        * @param string $role
+        * @param BNodeLabeler $labeler
+        *
+        * @return RdfWriterBase
+        */
+       protected function newSubWriter( $role, BNodeLabeler $labeler ) {
+               $writer = new self( $role, $labeler, $this->quoter );
+
+               return $writer;
+       }
+
+       /**
+        * @return string a MIME type
+        */
+       public function getMimeType() {
+               return 'text/turtle; charset=UTF-8';
+       }
+
+}