Replace HOME_LOCALE const with get_home_locale() func

src/mibew/libs/classes/Mibew/Controller/Settings/CommonController.php

@@ -148,7 +148,7 @@ class CommonController extends AbstractController
 
         $params['left_messages_locale'] = $request->request->get('leftmessageslocale');
         if (!in_array($params['left_messages_locale'], get_available_locales())) {
-            $params['left_messages_locale'] = HOME_LOCALE;
+            $params['left_messages_locale'] = get_home_locale();
         }
 
         if ($params['email'] && !is_valid_email($params['email'])) {

src/mibew/libs/classes/Mibew/Controller/WidgetController.php

@@ -108,7 +108,7 @@ class WidgetController extends AbstractController
                 // Get operator info
                 $operator = operator_by_id($thread->agentId);
                 $locale = $request->query->get('locale', '');
-                $operator_name = ($locale == HOME_LOCALE)
+                $operator_name = ($locale == get_home_locale())
                     ? $operator['vclocalename']
                     : $operator['vccommonname'];
 

src/mibew/libs/classes/Mibew/RequestProcessor/ThreadProcessor.php

@@ -597,7 +597,7 @@ class ThreadProcessor extends ClientSideProcessor
         // Get message locale
         $message_locale = Settings::get('left_messages_locale');
         if (!locale_exists($message_locale)) {
-            $message_locale = HOME_LOCALE;
+            $message_locale = get_home_locale();
         }
 
         // Create thread

src/mibew/libs/classes/Mibew/Settings.php

@@ -81,7 +81,7 @@ class Settings
             'max_connections_from_one_host' => 10,
             'thread_lifetime' => 600,
             'email' => '', /* inbox for left messages */
-            'left_messages_locale' => HOME_LOCALE,
+            'left_messages_locale' => get_home_locale(),
             'sendmessagekey' => 'center',
             'enableban' => '0',
             'enablessl' => '0',

src/mibew/libs/classes/Mibew/Thread.php

@@ -698,7 +698,7 @@ class Thread
      */
     public function checkForReassign($operator)
     {
-        $operator_name = ($this->locale == HOME_LOCALE)
+        $operator_name = ($this->locale == get_home_locale())
             ? $operator['vclocalename']
             : $operator['vccommonname'];
 
@@ -922,7 +922,7 @@ class Thread
     {
         $take_thread = false;
         $message = '';
-        $operator_name = ($this->locale == HOME_LOCALE)
+        $operator_name = ($this->locale == get_home_locale())
             ? $operator['vclocalename']
             : $operator['vccommonname'];
 

src/mibew/libs/common/locale.php

@@ -23,19 +23,6 @@ use Symfony\Component\Translation\Loader\PoFileLoader;
  */
 define('LOCALE_COOKIE_NAME', 'mibew_locale');
 
-// Test and set default locales
-
-/**
- * Verified value of the $home_locale configuration parameter (see
- * "configs/default_config.yml" for details)
- */
-define(
-    'HOME_LOCALE',
-    (locale_pattern_check($configs['home_locale']) && locale_exists($configs['home_locale'])
-        ? $configs['home_locale']
-        : 'en')
-);
-
 function locale_exists($locale)
 {
     return file_exists(MIBEW_FS_ROOT . "/locales/$locale/translation.po");
@@ -136,7 +123,8 @@ function get_user_locale()
 /**
  * Returns a value of the default locale.
  *
- * Generally it should be used if a user does not provide known lang.
+ * Generally, the locale returned by the function, should be used as a user
+ * locale if does not provide known lang.
  *
  * In fact the function returns verified value of "default_locale" variable from
  * the system configurations file.
@@ -159,6 +147,33 @@ function get_default_locale()
     return $default_locale;
 }
 
+/**
+ * Returns a value of the home locale.
+ *
+ * Generally, the locale returned by the function, should be used as a locale
+ * for operators' native names.
+ *
+ * In fact the function returns verified value of "home_locale" variable from
+ * the system configurations file.
+ *
+ * @return string Locale code.
+ */
+function get_home_locale()
+{
+    static $home_locale = null;
+
+    if (is_null($home_locale)) {
+        $configs = load_system_configs();
+        $is_correct = !empty($configs['home_locale'])
+            && locale_pattern_check($configs['home_locale'])
+            && locale_exists($configs['home_locale']);
+
+        $home_locale = $is_correct ? $configs['home_locale'] : 'en';
+    }
+
+    return $home_locale;
+}
+
 /**
  * Retrieves locale for the current request.
  *

src/mibew/libs/groups.php

@@ -72,7 +72,10 @@ function group_by_name($name)
  */
 function get_group_name($group)
 {
-    if (HOME_LOCALE == get_current_locale() || !isset($group['vccommonname']) || !$group['vccommonname']) {
+    $use_local_name = (get_home_locale() == get_current_locale())
+        || !isset($group['vccommonname'])
+        || !$group['vccommonname'];
+    if ($use_local_name) {
         return $group['vclocalname'];
     } else {
         return $group['vccommonname'];
@@ -242,7 +245,7 @@ function group_is_away($group)
  */
 function get_group_description($group)
 {
-    $use_local_description = HOME_LOCALE == get_current_locale()
+    $use_local_description = (get_home_locale() == get_current_locale())
         || !isset($group['vccommondescription'])
         || !$group['vccommondescription'];
 

src/mibew/libs/operator.php

@@ -509,7 +509,7 @@ function is_operator_online($operator_id)
  */
 function get_operator_name($operator)
 {
-    if (HOME_LOCALE == get_current_locale()) {
+    if (get_home_locale() == get_current_locale()) {
         return $operator['vclocalename'];
     } else {
         return $operator['vccommonname'];