Exclude current locale from the language selector (#521)

* allow exclusion of current locale

* refactor exclusion of current locale

* update README.md

* add param in docblock

Author: chriys

README.md

@@ -247,6 +247,9 @@ public function getSupportedLocales()
 
 //Should be called like this:
 {{ LaravelLocalization::getSupportedLocales() }}
+
+// To exclude current locale from returned array
+{{ LaravelLocalization::getSupportedLocales(true) }}
 ```
 
 This function will return all supported locales and their properties as an array.
@@ -384,6 +387,20 @@ If you're supporting multiple locales in your project you will probably want to
     @endforeach
 </ul>
 ```
+
+If you want to exclude current locale from the list, in the language selector.
+```
+<ul>
+    @foreach(LaravelLocalization::getSupportedLocales(true) as $localeCode => $properties)
+        <li>
+            <a rel="alternate" hreflang="{{ $localeCode }}" href="{{ LaravelLocalization::getLocalizedURL($localeCode, null, [], true) }}">
+                {{ $properties['native'] }}
+            </a>
+        </li>
+    @endforeach
+</ul>
+```
+
 Here default language will be forced in getLocalizedURL() to be present in the URL even `hideDefaultLocaleInURL = true`.
 
 ## Translated Routes

src/Mcamara/LaravelLocalization/LaravelLocalization.php

@@ -368,25 +368,29 @@ public function getDefaultLocale()
     /**
      * Return an array of all supported Locales.
      *
+     * @param boolean $excludeCurrent
      * @throws SupportedLocalesNotDefined
      *
      * @return array
      */
-    public function getSupportedLocales()
+    public function getSupportedLocales($excludeCurrent = false)
     {
-        if (!empty($this->supportedLocales)) {
-            return $this->supportedLocales;
+        if (empty($this->supportedLocales)) {
+            $this->supportedLocales = $this->configRepository->get('laravellocalization.supportedLocales');
         }
 
-        $locales = $this->configRepository->get('laravellocalization.supportedLocales');
-
-        if (empty($locales) || !is_array($locales)) {
+        if (empty($this->supportedLocales) || !is_array($this->supportedLocales)) {
             throw new SupportedLocalesNotDefined();
         }
 
-        $this->supportedLocales = $locales;
+        if ($excludeCurrent) {
+            $locales = $this->supportedLocales;
+            unset($locales[$this->currentLocale]);
+            
+            return $locales;
+        }
 
-        return $locales;
+        return $this->supportedLocales;
     }
 
     /**

tests/LocalizerTests.php

@@ -1,6 +1,7 @@
 <?php
 
 use Illuminate\Routing\Route;
+use Mcamara\LaravelLocalization\Facades\LaravelLocalization;
 
 class LocalizerTests extends \Orchestra\Testbench\BrowserKit\TestCase
 {
@@ -457,6 +458,22 @@ public function testGetSupportedLocales()
         );
     }
 
+    public function testGetSupportedLocalesExceptCurrent()
+    {
+        $allLocalesCount = count($this->supportedLocales);
+        $currentLocale = $this->defaultLocale;
+        
+        $this->assertThat(
+            LaravelLocalization::getSupportedLocales(true),
+            $this->logicalNot(
+                $this->arrayHasKey($currentLocale)
+            )
+        );
+        $this->assertCount($allLocalesCount - 1, LaravelLocalization::getSupportedLocales(true));
+
+        $this->assertCount($allLocalesCount, LaravelLocalization::getSupportedLocales(false));
+    }
+
     public function testGetCurrentLocaleName()
     {
         $this->assertEquals(