Implement Kyslik#52, introduce new configuration key-value pair

  - enable formatted title injecting

src/ColumnSortable/SortableLink.php

@@ -23,10 +23,14 @@ public static function render(array $parameters)
         list($sortColumn, $sortParameter, $title, $queryParameters) = self::parseParameters($parameters);
 
         $title = self::applyFormatting($title);
+
+        if ($mergeTitleAs = Config::get('columnsortable.inject_title_as', null)) {
+            Request::merge([$mergeTitleAs => $title]);
+        }
 
         $icon = Config::get('columnsortable.default_icon_set');
 
-        foreach (Config::get('columnsortable.columns') as $value) {
+        foreach (Config::get('columnsortable.columns', []) as $value) {
             if (in_array($sortColumn, $value['rows'])) {
                 $icon = $value['class'];
             }

src/config/columnsortable.php

@@ -66,6 +66,12 @@
      */
     'formatting_function' => 'ucfirst',
 
+    /*
+    inject title parameter in query strings, use null to turn injection off
+    example: 'inject_title' => 't' will result in ..user/?t="formatted title of sorted column"
+     */
+    'inject_title_as' => null,
+
     /*
     allow request modification, when default sorting is set but is not in URI (first load)
      */

tests/ColumnSortableTraitTest.php

@@ -1,7 +1,6 @@
 <?php
 
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Support\Facades\Config;
 use Illuminate\Support\Facades\Input;
 
 /**
@@ -37,7 +36,7 @@ public function setUp()
         $this->user = new User();
         $this->profile = new Profile();
 
-        $this->configDefaultDirection = Config::get('columnsortable.default_direction', 'asc');
+        $this->configDefaultDirection = 'asc';
     }
 
     public function testSortableWithoutDefaultAndRequestParameters()

tests/SortableLinkTest.php

@@ -1,4 +1,7 @@
 <?php
+
+use Illuminate\Support\Facades\Config;
+use Illuminate\Support\Facades\Request;
 use Kyslik\ColumnSortable\Exceptions\ColumnSortableException;
 use Kyslik\ColumnSortable\SortableLink;
 
@@ -7,6 +10,24 @@
  */
 class SortableLinkTest extends \Orchestra\Testbench\TestCase
 {
+
+    public function testInjectTitleInQueryStrings()
+    {
+        Config::set('columnsortable.inject_title_as', 'title');
+        SortableLink::render(['column', 'ColumnTitle']);
+
+        $expected = ['title' => 'ColumnTitle'];
+        $this->assertEquals($expected, Request::all());
+    }
+
+    public function testInjectTitleInQueryStringsIsOff()
+    {
+        Config::set('columnsortable.inject_title_as', null);
+        SortableLink::render(['column', 'ColumnTitle']);
+
+        $this->assertEquals([], Request::all());
+    }
+
     public function testParseParameters()
     {
         $parameters = ['column'];