Fixed issues with relative path reference parsing

Author: Aribros

src/ReferenceContext.php

@@ -121,10 +121,18 @@ private function reduceDots($path)
                 unset($parts[$i]);
                 continue;
             }
-            if ($i > 0 && $parts[$i] === '..' && $parts[$i - $parentOffset] !== '..') {
-                unset($parts[$i - $parentOffset]);
-                unset($parts[$i]);
-                $parentOffset += 2;
+            
+            if ($i > 0 && $parts[$i] === '..') {
+                $parent = $i - $parentOffset;
+                //Make sure parent exists, if not, check the next parent etc
+                while($parent >= 0 && empty($parts[$parent])){
+                        $parent--;
+                }
+                //Confirm parent is valid
+                if(!empty($parts[$parent]) && $parts[$parent] !== '..'){
+                    unset($parts[$parent]);
+                    unset($parts[$i]);
+                }
             }
         }
         return '/'.implode('/', $parts);

tests/ReferenceContextTest.php

@@ -183,10 +183,14 @@ public function normalizeUriProvider()
                 '/var/www/api/schema/../../definitions.yaml',
                 'file:///var/www/definitions.yaml',
             ],
+            [
+                '/var/www/api/schema/./../data/./../definitions.yaml',
+                'file:///var/www/api/definitions.yaml',
+            ],           
             [
                 '/var/www/api/schema/./../definitions.yaml',
                 'file:///var/www/api/definitions.yaml',
-            ],
+            ],            
             [
                 '/var/www/api/../definitions.yaml#/components/Pet',
                 'file:///var/www/definitions.yaml#/components/Pet',