Google_Model toSimpleObject didn't convert Arrays

Array and Map types weren't be recursively converted, so we
would be returning the raw object. This could lead to nulls or
other unexpected data being sent. Should resolve the underlying issue
for googleapis#52

src/Google/Model.php

@@ -113,23 +113,42 @@ public function toSimpleObject()
     $props = $reflect->getProperties(ReflectionProperty::IS_PUBLIC);
     foreach ($props as $member) {
       $name = $member->getName();
-      if ($this->$name instanceof Google_Model) {
-        $object->$name = $this->$name->toSimpleObject();
-      } else if ($this->$name !== null) {
-        $object->$name = $this->$name;
+      $result = $this->getSimpleValue($this->$name);
+      if ($result != null) {
+        $object->$name = $result;
       }
     }
 
     // Process all other data.
     foreach ($this->data as $key => $val) {
-      if ($val instanceof Google_Model) {
-        $object->$key = $val->toSimpleObject();
-      } else if ($val !== null) {
-        $object->$key = $val;
+      $result = $this->getSimpleValue($val);
+      if ($result != null) {
+        $object->$key = $result;
       }
     }
     return $object;
   }
+
+  /**
+   * Handle different types of values, primarily
+   * other objects and map and array data types.
+   */
+  private function getSimpleValue($value)
+  {
+    if ($value instanceof Google_Model) {
+      return $value->toSimpleObject();
+    } else if (is_array($value)) {
+      $return = array();
+      foreach ($value as $key => $a_value) {
+        $a_value = $this->getSimpleValue($a_value);
+        if ($a_value != null) {
+          $return[$key] = $a_value;
+        }
+      }
+      return $return;
+    }
+    return $value;
+  }
 
   /**
    * Returns true only if the array is associative.

tests/general/ApiModelTest.php

@@ -28,11 +28,18 @@ public function testJsonStructure() {
     $model2->publicC = 12345;
     $model2->publicD = null;
     $model->publicB = $model2;
+    $model3 = new Google_Model();
+    $model3->publicE = 54321;
+    $model3->publicF = null;
+    $model->publicG = array($model3, "hello");
     $string = json_encode($model->toSimpleObject());
     $data = json_decode($string, true);
     $this->assertEquals(12345, $data['publicB']['publicC']);
     $this->assertEquals("This is a string", $data['publicA']);
     $this->assertArrayNotHasKey("publicD", $data['publicB']);
+    $this->assertArrayHasKey("publicE", $data['publicG'][0]);
+    $this->assertArrayNotHasKey("publicF", $data['publicG'][0]);
+    $this->assertEquals("hello", $data['publicG'][1]);
     $this->assertArrayNotHasKey("data", $data);
   }
 }

tests/youtube/YouTubeTest.php

@@ -72,5 +72,13 @@ public function testMissingFieldsAreNull() {
     $simpleManual = $o_channel->toSimpleObject();
     $this->assertObjectHasAttribute('timeLinked', $simpleManual->contentOwnerDetails);    
     $this->assertObjectNotHasAttribute('contentOwner', $simpleManual->contentOwnerDetails);
+
+    $ping = new Google_Service_YouTube_ChannelConversionPing();
+    $ping->setContext("hello");
+    $pings = new Google_Service_YouTube_ChannelConversionPings();
+    $pings->setPings(array($ping));
+    $simplePings = $pings->toSimpleObject();
+    $this->assertObjectHasAttribute('context', $simplePings->pings[0]);    
+    $this->assertObjectNotHasAttribute('conversionUrl', $simplePings->pings[0]);    
   }
-}
+}