Validate option lang

Author: ahmedash95

src/Commands/ShowCommand.php

@@ -82,9 +82,13 @@ public function handle()
         $this->files = $this->filesFromKey();
 
         $this->languages = $this->manager->languages();
-        
-        if($this->option('lang') != null){
-            $this->languages = explode(',',$this->option('lang'));
+
+        if ($this->option('lang') != null) {
+            $languages = explode(',', $this->option('lang'));
+            if (!empty($diffLangagues = array_diff($languages, $this->languages))) {
+                return $this->error('Unknown Langauges [ '.implode($diffLangagues,',').' ]');
+            }
+            $this->languages = explode(',', $this->option('lang'));
         }
 
         $this->table(
@@ -106,11 +110,11 @@ private function tableRows()
 
         foreach ($this->files as $languageKey => $file) {
             foreach ($filesContent[$languageKey] = Arr::dot($this->manager->getFileContent($file)) as $key => $value) {
-                if (! $this->shouldShowKey($key)) {
+                if (!$this->shouldShowKey($key)) {
                     continue;
                 }
 
-                $output[$key]['key'] = $key;
+                $output[$key]['key']        = $key;
                 $output[$key][$languageKey] = $value;
             }
         }
@@ -190,11 +194,11 @@ private function shouldShowKey($key)
                 return true;
             }
 
-            if (! $this->option('close') && $key != $this->key) {
+            if (!$this->option('close') && $key != $this->key) {
                 return false;
             }
 
-            if ($this->option('close') && ! Str::contains($key, $this->key)) {
+            if ($this->option('close') && !Str::contains($key, $this->key)) {
                 return false;
             }
         }