add Multilingual form widget

Author: ZAYEC77

src/widgets/Multilingual.php

@@ -0,0 +1,56 @@
+<?php
+/**
+ * @author    Dmytro Karpovych
+ * @copyright 2016 NRE
+ */
+namespace nullref\core\widgets;
+
+use nullref\core\interfaces\ILanguageManager;
+use Yii;
+use yii\base\Widget;
+
+class Multilingual extends Widget
+{
+    public $tab;
+    public $model;
+    public $languages = null;
+
+    /**
+     * @var MultilingualForm
+     */
+    public $form;
+
+    public function init()
+    {
+        parent::init();
+        if (!count($this->languages)) {
+            /** @var ILanguageManager $languageManager */
+            $languageManager = Yii::$app->get('languageManager');
+            $this->languages = $languageManager->getLanguages();
+        }
+    }
+
+
+    public function run()
+    {
+        $this->view->registerJs(<<<JS
+jQuery('form .nav.nav-tabs').find('a').each(function (index, item) {
+    var link = jQuery(item);
+    var errors = jQuery(link.attr('href')).find('.has-error');
+    if (errors.length) {
+        link.css('color', '#A94442');
+        link.html('<i class="fa fa-exclamation-triangle"></i>' + link.text());
+    }
+});
+JS
+        );
+        $form = new MultilingualForm();
+        ob_get_clean();
+        return $this->render('multilingual', [
+            'form' => $form,
+            'tab' => $this->tab,
+            'model' => $this->model,
+            'languages' => $this->languages,
+        ]);
+    }
+}

src/widgets/MultilingualForm.php

@@ -0,0 +1,21 @@
+<?php
+/**
+ * @author    Dmytro Karpovych
+ * @copyright 2016 NRE
+ */
+namespace nullref\core\widgets;
+
+use yii\widgets\ActiveForm;
+
+class MultilingualForm extends ActiveForm
+{
+    public $language;
+
+    public function field($model, $attribute, $options = [])
+    {
+        if ($this->language) {
+            return parent::field($model, $attribute . '_' . $this->language, $options);
+        }
+        return parent::field($model, $attribute, $options);
+    }
+}

src/widgets/views/multilingual.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * @var $this \yii\web\View
+ * @var $form \nullref\core\widgets\MultilingualForm
+ * @var $model \yii\base\Model
+ * @var $tab Closure
+ */
+use app\helpers\Languages;
+
+?>
+<style>
+    .multilingual-tab-content {
+        padding: 15px;
+        margin-bottom: 5px;
+        border: 1px solid #ddd;
+        border-top: none;
+        border-radius: 5px;
+        border-top-left-radius: 0;
+        border-top-right-radius: 0;
+    }
+</style>
+<div class="multilingual">
+    <ul class="nav nav-tabs">
+        <?php $first = true;
+        foreach (Languages::getSlugMap() as $key => $lang): ?>
+            <li class="<?= ($first) ? 'active' : '' ?>">
+                <a data-toggle="tab" href="#<?= $lang ?>">
+                    <?= Yii::t('translation', Languages::getMap()[$key]) ?>
+                </a>
+            </li>
+            <?php $first = false; endforeach ?>
+    </ul>
+    <div class="tab-content multilingual-tab-content" style="padding: 10px 5px">
+        <?php $first = true;
+        foreach (Languages::getSlugMap() as $key => $lang): ?>
+            <div id="<?= $lang ?>" class="tab-pane <?= ($first) ? 'active' : '' ?>">
+                <?php $form->language = $lang ?>
+                <?= call_user_func($tab, $form, $model) ?>
+            </div>
+            <?php $first = false; endforeach ?>
+    </div>
+</div>