1 files changed, 98 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Utils/JsonSchemaValidator.php b/www/wiki/extensions/SemanticMediaWiki/src/Utils/JsonSchemaValidator.php
new file mode 100644
index 00000000..8a849ef6
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Utils/JsonSchemaValidator.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace SMW\Utils;
+
+use JsonSchema\Exception\ResourceNotFoundException;
+use JsonSchema\Validator as SchemaValidator;
+use JsonSerializable;
+
+/**
+ * @license GNU GPL v2+
+ * @since 3.0
+ *
+ * @author mwjames
+ */
+class JsonSchemaValidator {
+
+	/**
+	 * @var SchemaValidator
+	 */
+	private $schemaValidator;
+
+	/**
+	 * @var boolen
+	 */
+	private $isValid = true;
+
+	/**
+	 * @var []
+	 */
+	private $errors = [];
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param SchemaValidator|null $schemaValidator
+	 */
+	public function __construct( SchemaValidator $schemaValidator = null ) {
+		$this->schemaValidator = $schemaValidator;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param JsonSerializable $data
+	 * @param string|null $schemaLink
+	 */
+	public function validate( JsonSerializable $data, $schemaLink = null ) {
+
+		if ( $this->schemaValidator === null || $schemaLink === null ) {
+			return;
+		}
+
+		// https://github.com/justinrainbow/json-schema/issues/203
+		$data = json_decode( $data->jsonSerialize() );
+
+		// https://github.com/justinrainbow/json-schema
+		try {
+			$this->schemaValidator->check(
+				$data,
+				(object)[ '$ref' => 'file://' . $schemaLink ]
+			);
+
+			$this->isValid = $this->schemaValidator->isValid();
+			$this->errors = $this->schemaValidator->getErrors();
+		} catch ( ResourceNotFoundException $e ) {
+			$this->isValid = false;
+			$this->errors[] = $e->getMessage();
+		}
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param boolean
+	 */
+	public function hasSchemaValidator() {
+		return $this->schemaValidator !== null;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param boolean
+	 */
+	public function isValid() {
+		return $this->isValid;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @return []
+	 */
+	public function getErrors() {
+		return $this->errors;
+	}
+
+}