Added builder offset method.

Author: babenkoivan

README.md

@@ -195,10 +195,17 @@ Now you can [index](https://laravel.com/docs/5.5/scout#indexing) and [search](ht
 Basic search usage example:
 
 ```php
-App\MyModel::search('phone') 
+// set query string
+App\MyModel::search('phone')
+    // filter 
     ->where('color', 'red')
+    // sort
     ->orderBy('price', 'asc')
+    // set offset
+    ->from(0)
+    // set limit
     ->take(10)
+    // get results
     ->get();
 ```
 

src/Builders/FilterBuilder.php

@@ -13,6 +13,8 @@ class FilterBuilder extends Builder
 
     public $with;
 
+    public $offset;
+
     public function __construct($model, $callback = null)
     {
         $this->model = $model;
@@ -196,4 +198,11 @@ public function with($relations)
 
         return $this;
     }
+
+    public function from($offset)
+    {
+        $this->offset = $offset;
+
+        return $this;
+    }
 }

src/ElasticEngine.php

@@ -80,12 +80,12 @@ protected function buildSearchQueryPayload(Builder $builder, $queryPayload, arra
             ->setIfNotEmpty('body.explain', $options['explain'] ?? null)
             ->setIfNotEmpty('body.profile', $options['profile'] ?? null);
 
-        if ($size = isset($options['limit']) ? $options['limit'] : $builder->limit) {
-            $payload->set('body.size', $size);
+        if (isset($builder->offset)) {
+            $payload->set('body.from', $builder->offset);
+        }
 
-            if (isset($options['page'])) {
-                $payload->set('body.from', ($options['page'] - 1) * $size);
-            }
+        if (isset($builder->limit)) {
+            $payload->set('body.size', $builder->limit);
         }
 
         return $payload->get();
@@ -163,10 +163,11 @@ public function search(Builder $builder)
 
     public function paginate(Builder $builder, $perPage, $page)
     {
-        return $this->performSearch($builder, [
-            'limit' => $perPage,
-            'page' => $page
-        ]);
+        $builder
+            ->from(($page - 1) * $perPage)
+            ->take($perPage);
+
+        return $this->performSearch($builder);
     }
 
     public function explain(Builder $builder)

tests/ElasticEngineTest.php

@@ -189,6 +189,39 @@ public function test_if_the_search_method_with_specified_limit_builds_correct_pa
         $this->addToAssertionCount(1);
     }
 
+    public function test_if_the_search_method_with_specified_offset_builds_correct_payload()
+    {
+        $this
+            ->mockClient()
+            ->shouldReceive('search')
+            ->with([
+                'index' => 'test_index',
+                'type' => 'test_table',
+                'body' => [
+                    'query' => [
+                        'bool' => [
+                            'must' => [
+                                'query_string' => [
+                                    'query' => 'test query'
+                                ]
+                            ]
+                        ]
+                    ],
+                    'from' => 10
+                ]
+            ]);
+
+        $model = $this->mockModel();
+
+        $builder = (new SearchBuilder($model, 'test query'))->from(10);
+
+        $this
+            ->buildEngine()
+            ->search($builder);
+
+        $this->addToAssertionCount(1);
+    }
+
     public function test_if_the_search_method_with_specified_order_builds_correct_payload()
     {
         $this->mockClient()