feat: exchangerate for Article Lists

locale.xml

@@ -635,6 +635,11 @@
             <de><![CDATA[ecoyn Dashboard]]></de>
             <en><![CDATA[ecoyn dashboard]]></en>
         </locale>
+
+        <locale name="exchangerate.text">
+            <de><![CDATA[[startCurrency] = [rate]]]></de>
+            <en><![CDATA[[startCurrency] = [rate]]]></en>
+        </locale>
     </groups>
 
     <groups name="quiqqer/erp" datatype="js">

src/QUI/ERP/Accounting/ArticleList.html

@@ -105,4 +105,10 @@
             </td>
         </tr>
     </table>
+
+    {if $showExchangeRate}
+    <div class="articles-sum-exchgane-rate" style="font-size: 12px; float: left; margin-top: 20px;">
+        {$exchangeRateText}
+    </div>
+    {/if}
 </div>

src/QUI/ERP/Accounting/ArticleListUnique.php

@@ -49,6 +49,11 @@ class ArticleListUnique implements \IteratorAggregate
      */
     protected $User = null;
 
+    /**
+     * @var bool
+     */
+    protected $showExchangeRate = true;
+
     /**
      * ArticleList constructor.
      *
@@ -315,15 +320,35 @@ public function toHTML($template = false): string
             return $View;
         }, $this->articles);
 
+        $ExchangeCurrency = QUI\ERP\Currency\Conf::getAccountingCurrency();
+        $showExchangeRate = $this->showExchangeRate;
+        $exchangeRateText = '';
+
+        if ($ExchangeCurrency->getCode() === $Currency->getCode()) {
+            $showExchangeRate = false;
+            $exchangeRate     = false;
+        } else {
+            $exchangeRate = $ExchangeCurrency->getExchangeRate($Currency);
+            $exchangeRate = $Currency->format($exchangeRate);
+
+            $exchangeRateText = $this->Locale->get('quiqqer/erp', 'exchangerate.text', [
+                'startCurrency' => $ExchangeCurrency->format(1),
+                'rate'          => $exchangeRate
+            ]);
+        }
+
         // output
         $Engine->assign([
-            'priceFactors' => $this->PriceFactors->toArray(),
-            'showHeader'   => $this->showHeader,
-            'this'         => $this,
-            'articles'     => $articles,
-            'calculations' => $this->calculations,
-            'vatArray'     => $vatArray,
-            'Locale'       => $this->Locale
+            'priceFactors'     => $this->PriceFactors->toArray(),
+            'showHeader'       => $this->showHeader,
+            'this'             => $this,
+            'articles'         => $articles,
+            'calculations'     => $this->calculations,
+            'vatArray'         => $vatArray,
+            'Locale'           => $this->Locale,
+            'showExchangeRate' => $showExchangeRate,
+            'exchangeRate'     => $exchangeRate,
+            'exchangeRateText' => $exchangeRateText
         ]);
 
         if ($template && \file_exists($template)) {