+
+
+ /**
+ * @param string $name Parameter name
+ * @param $string $value Parameter value
+ * @return bool Validity
+ */
+ function validateParam( $name, $value ) {
+ if ( in_array( $name, array( 'width', 'height' ) ) ) {
+ // Reject negative heights, widths
+ return ( $value > 0 );
+ } elseif( $name == 'lang' ) {
+ // Validate $code
+ if( !Language::isValidBuiltinCode( $value ) ) {
+ wfDebug( "Invalid user language code\n" );
+ return false;
+ }
+ return true;
+ }
+ // Only lang, width and height are acceptable keys
+ return false;
+ }
+
+ /**
+ * @param array $params name=>value pairs of parameters
+ * @return string Filename to use
+ */
+ function makeParamString( $params ) {
+ $lang = '';
+ if( isset( $params['lang'] ) && $params['lang'] !== 'en' ) {
+ $params['lang'] = mb_strtolower( $params['lang'] );
+ $lang = "lang{$params['lang']}-";
+ }
+ if ( !isset( $params['width'] ) ) {
+ return false;
+ }
+ return "$lang{$params['width']}px";
+ }
+
+ function parseParamString( $str ) {
+ $m = false;
+ if ( preg_match( '/^lang([a-z]+(?:-[a-z]+)*)-(\d+)px$/', $str, $m ) ) {
+ return array( 'width' => array_pop( $m ), 'lang' => $m[1] );
+ } elseif( preg_match( '/^(\d+)px$/', $str, $m ) ) {
+ return array( 'width' => $m[1], 'lang' => 'en' );
+ } else {
+ return false;
+ }
+ }
+
+ function getParamMap() {
+ return array( 'img_lang' => 'lang', 'img_width' => 'width' );
+ }
+
+ /**
+ * @param $params
+ * @return array
+ */
+ function getScriptParams( $params ) {
+ return array(
+ 'width' => $params['width'],
+ 'lang' => $params['lang'],
+ );
+ }