first commit

1 files changed, 79 insertions, 0 deletions

diff --git a/www/wiki/extensions/Maps/src/DataAccess/JsonFileParser.php b/www/wiki/extensions/Maps/src/DataAccess/JsonFileParser.php
new file mode 100644
index 00000000..81d6cfa0
--- /dev/null
+++ b/www/wiki/extensions/Maps/src/DataAccess/JsonFileParser.php
@@ -0,0 +1,79 @@
+<?php
+
+declare( strict_types = 1 );
+
+namespace Maps\DataAccess;
+
+use FileFetcher\FileFetcher;
+use FileFetcher\FileFetchingException;
+use Maps\MapsFactory;
+use ValueParsers\ParseException;
+use ValueParsers\ValueParser;
+
+/**
+ * Returns the content of the JSON file at the specified location as array.
+ * Empty array is returned on failure.
+ *
+ * @licence GNU GPL v2+
+ * @author Jeroen De Dauw < jeroendedauw@gmail.com >
+ */
+class JsonFileParser implements ValueParser {
+
+	private $fileFetcher;
+	private $pageContentFetcher;
+	private $defaultNamespace;
+
+	public function __construct( $fileFetcher = null, PageContentFetcher $pageContentFetcher = null ) {
+		$this->fileFetcher = $fileFetcher instanceof FileFetcher
+			? $fileFetcher : MapsFactory::newDefault()->getGeoJsonFileFetcher();
+
+		$this->pageContentFetcher = $pageContentFetcher instanceof PageContentFetcher
+			? $pageContentFetcher : MapsFactory::newDefault()->getPageContentFetcher();
+
+		$this->defaultNamespace = NS_GEO_JSON;
+	}
+
+	/**
+	 * @param string $fileLocation
+	 *
+	 * @return array
+	 * @throws ParseException
+	 */
+	public function parse( $fileLocation ) {
+		$jsonString = $this->getJsonString( $fileLocation );
+
+		if ( $jsonString === null ) {
+			return [];
+		}
+
+		$json = json_decode( $jsonString, true );
+
+		if ( $json === null ) {
+			return [];
+		}
+
+		return $json;
+	}
+
+	private function getJsonString( string $fileLocation ): ?string {
+		$content = $this->pageContentFetcher->getPageContent( $fileLocation, $this->defaultNamespace );
+
+		if ( $content instanceof \JsonContent ) {
+			return $content->getNativeData();
+		}
+
+		// Prevent reading JSON files on the server
+		if( !filter_var( $fileLocation, FILTER_VALIDATE_URL) ) {
+			return null;
+		}
+
+		try {
+			return $this->fileFetcher->fetchFile( $fileLocation );
+		}
+		catch ( FileFetchingException $ex ) {
+			return null;
+		}
+	}
+
+
+}