Add filters option and replace tags with filters in readme example

Author: norkunas

README.md

@@ -81,17 +81,22 @@ $api->notifications->add([
     'data' => ['foo' => 'bar'],
     'isChrome' => true,
     'send_after' => new \DateTime('1 hour'),
-    'tags' => [
+    'filters' => [
         [
-            'key' => 'level',
-            'relation' => '>',
-            'value' => '10',
+            'field' => 'tag',
+            'key' => 'is_vip',
+            'relation' => '!=',
+            'value' => 'true',
+        ],
+        [
+            'operator' => 'OR',
         ],
         [
-            'key' => 'madePurchase',
+            'field' => 'tag',
+            'key' => 'is_admin',
             'relation' => '=',
             'value' => 'true',
-        ]
+        ],
     ],
     // ..other options
 ]));

src/Notifications.php

@@ -180,6 +180,21 @@ protected function resolve(array $data)
             ->setAllowedTypes('include_chrome_web_reg_ids', 'array')
             ->setDefined('app_ids')
             ->setAllowedTypes('app_ids', 'array')
+            ->setDefined('filters')
+            ->setAllowedTypes('filters', 'array')
+            ->setNormalizer('filters', function (Options $options, array $value) {
+                $filters = [];
+
+                foreach ($value as $filter) {
+                    if (isset($filter['field'])) {
+                        $filters[] = $filter;
+                    } elseif (isset($filter['operator'])) {
+                        $filters[] = ['operator' => 'OR'];
+                    }
+                }
+
+                return $filters;
+            })
             ->setDefined('tags')
             ->setAllowedTypes('tags', 'array')
             ->setNormalizer('tags', function (Options $options, array $value) {