fault-tolerant patch apply

Author: vearutop

src/JsonPatch.php

@@ -106,45 +106,57 @@ public function jsonSerialize()
 
     /**
      * @param mixed $original
+     * @param bool $stopOnError
+     * @return Exception[] array of errors
      * @throws Exception
      */
-    public function apply(&$original)
+    public function apply(&$original, $stopOnError = true)
     {
+        $errors = array();
         foreach ($this->operations as $operation) {
-            $pathItems = JsonPointer::splitPath($operation->path);
-            switch (true) {
-                case $operation instanceof Add:
-                    JsonPointer::add($original, $pathItems, $operation->value, false);
-                    break;
-                case $operation instanceof Copy:
-                    $fromItems = JsonPointer::splitPath($operation->from);
-                    $value = JsonPointer::get($original, $fromItems);
-                    JsonPointer::add($original, $pathItems, $value, false);
-                    break;
-                case $operation instanceof Move:
-                    $fromItems = JsonPointer::splitPath($operation->from);
-                    $value = JsonPointer::get($original, $fromItems);
-                    JsonPointer::remove($original, $fromItems);
-                    JsonPointer::add($original, $pathItems, $value, false);
-                    break;
-                case $operation instanceof Remove:
-                    JsonPointer::remove($original, $pathItems);
-                    break;
-                case $operation instanceof Replace:
-                    JsonPointer::get($original, $pathItems);
-                    JsonPointer::remove($original, $pathItems);
-                    JsonPointer::add($original, $pathItems, $operation->value, false);
-                    break;
-                case $operation instanceof Test:
-                    $value = JsonPointer::get($original, $pathItems);
-                    $diff = new JsonDiff($operation->value, $value,
-                        JsonDiff::STOP_ON_DIFF);
-                    if ($diff->getDiffCnt() !== 0) {
-                        throw new Exception('Test operation ' . json_encode($operation, JSON_UNESCAPED_SLASHES)
-                            . ' failed: ' . json_encode($value));
-                    }
-                    break;
+            try {
+                $pathItems = JsonPointer::splitPath($operation->path);
+                switch (true) {
+                    case $operation instanceof Add:
+                        JsonPointer::add($original, $pathItems, $operation->value, false);
+                        break;
+                    case $operation instanceof Copy:
+                        $fromItems = JsonPointer::splitPath($operation->from);
+                        $value = JsonPointer::get($original, $fromItems);
+                        JsonPointer::add($original, $pathItems, $value, false);
+                        break;
+                    case $operation instanceof Move:
+                        $fromItems = JsonPointer::splitPath($operation->from);
+                        $value = JsonPointer::get($original, $fromItems);
+                        JsonPointer::remove($original, $fromItems);
+                        JsonPointer::add($original, $pathItems, $value, false);
+                        break;
+                    case $operation instanceof Remove:
+                        JsonPointer::remove($original, $pathItems);
+                        break;
+                    case $operation instanceof Replace:
+                        JsonPointer::get($original, $pathItems);
+                        JsonPointer::remove($original, $pathItems);
+                        JsonPointer::add($original, $pathItems, $operation->value, false);
+                        break;
+                    case $operation instanceof Test:
+                        $value = JsonPointer::get($original, $pathItems);
+                        $diff = new JsonDiff($operation->value, $value,
+                            JsonDiff::STOP_ON_DIFF);
+                        if ($diff->getDiffCnt() !== 0) {
+                            throw new Exception('Test operation ' . json_encode($operation, JSON_UNESCAPED_SLASHES)
+                                . ' failed: ' . json_encode($value));
+                        }
+                        break;
+                }
+            } catch (Exception $exception) {
+                if ($stopOnError) {
+                    throw $exception;
+                } else {
+                    $errors[] = $exception;
+                }
             }
         }
+        return $errors;
     }
 }

tests/src/JsonPatchTest.php

@@ -110,4 +110,17 @@ public function testApply()
         $this->assertSame(array('AAA', 'AAA'), $original);
     }
 
+    public function testApplyContinueOnError()
+    {
+        $p = new JsonPatch();
+        $p->op(new JsonPatch\Test('/missing', 1));
+        $p->op(new JsonPatch\Copy('/1', '/0'));
+        $p->op(new JsonPatch\Test('/missing2', null));
+        $original = array('AAA');
+        $errors = $p->apply($original, false);
+        $this->assertSame(array('AAA', 'AAA'), $original);
+        $this->assertSame('Key not found: missing', $errors[0]->getMessage());
+        $this->assertSame('Key not found: missing2', $errors[1]->getMessage());
+    }
+
 }