1 files changed, 77 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Utils/ErrorCodeFormatter.php b/www/wiki/extensions/SemanticMediaWiki/src/Utils/ErrorCodeFormatter.php
new file mode 100644
index 00000000..354902ad
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Utils/ErrorCodeFormatter.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace SMW\Utils;
+
+/**
+ * Convenience method to retrieved stringified error codes.
+ *
+ * @license GNU GPL v2+
+ * @since 2.5
+ *
+ * @author mwjames
+ */
+class ErrorCodeFormatter {
+
+	/**
+	 * @var array
+	 */
+	private static $constants = [];
+
+	/**
+	 * @var array
+	 */
+	private static $jsonErrors = [];
+
+	/**
+	 * @see http://php.net/manual/en/function.json-decode.php
+	 * @since 2.5
+	 *
+	 * @param integer $errorCode
+	 *
+	 * @return string
+	 */
+	public static function getStringFromJsonErrorCode( $errorCode ) {
+
+		if ( self::$constants === [] ) {
+			self::$constants = get_defined_constants( true );
+		}
+
+		if ( isset( self::$constants["json"] ) && self::$jsonErrors === [] ) {
+			foreach ( self::$constants["json"] as $name => $value ) {
+				if ( !strncmp( $name, "JSON_ERROR_", 11 ) ) {
+					self::$jsonErrors[$value] = $name;
+				}
+			}
+		}
+
+		return isset( self::$jsonErrors[$errorCode] ) ? self::$jsonErrors[$errorCode] : 'UNKNOWN';
+	}
+
+	/**
+	 * @since 2.5
+	 *
+	 * @param integer $errorCode
+	 *
+	 * @return string
+	 */
+	public static function getMessageFromJsonErrorCode( $errorCode ) {
+
+		$errorMessages = [
+			JSON_ERROR_STATE_MISMATCH => 'Underflow or the modes mismatch, malformed JSON',
+			JSON_ERROR_CTRL_CHAR => 'Unexpected control character found, possibly incorrectly encoded',
+			JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON',
+			JSON_ERROR_UTF8   => 'Malformed UTF-8 characters, possibly incorrectly encoded',
+			JSON_ERROR_DEPTH  => 'The maximum stack depth has been exceeded'
+		];
+
+		if ( !isset( $errorMessages[$errorCode] ) ) {
+			return self::getStringFromJsonErrorCode( $errorCode );
+		}
+
+		return sprintf(
+			"Expected a JSON compatible format but failed with '%s'",
+			$errorMessages[$errorCode]
+		);
+	}
+
+}