Add MDCurrenciesSet for controlling currencies

l18n

@@ -1 +1 @@
-Subproject commit 4b2c9ffee40ae15164b282177faabde441271821
+Subproject commit 38c989b971471a0b69fe486cedf1d35587640ce8

src/MDCurrenciesSet.php

@@ -0,0 +1,39 @@
+<?PHP
+/**
+ * Contains a class for controlling the list of available currencies.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+
+/**
+ * Class containing available currencies.
+ */
+class MDCurrenciesSet extends MDValueSet {
+
+    const CURRENCIES = [
+        '',
+        "de-DM",
+        "de-RM",
+        "es-Real",
+        "eu-EUR",
+        "id-IDR",
+        "hu-Ft",
+        'hu-Lari',
+        'hu-Pengő',
+        "pl-Złoty",
+        "us-USD",
+    ];
+
+    /**
+     * Gets a list of the entries in a translated version.
+     *
+     * @param MDTlLoader $tlLoader Translation loader.
+     *
+     * @return array<string>
+     */
+    public static function getSortedList(MDTlLoader $tlLoader):array {
+        return parent::getTlSortedList($tlLoader, self::CURRENCIES, "currencies_set", "currencies_set");
+
+    }
+
+}

src/MDValueSet.php

@@ -24,7 +24,8 @@ class MDValueSet {
 
         $output = [];
         foreach ($keyList as $tID) {
-            $output[$tID] = $tlLoader->tl($tlFileName, $tlVarName, $tID);
+            if ($tID === "") $output[$tID] = "";
+            else $output[$tID] = $tlLoader->tl($tlFileName, $tlVarName, $tID);
         }
 
         asort($output);