first commit

class/Query/Price.php

@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * Created by PhpStorm.
+ * User: filip
+ * Date: 5/16/16
+ * Time: 1:13 PM.
+ */
+
+namespace Query;
+
+class Price
+{
+    public static function selectRange($minAlias = 'min', $maxAlias = 'max')
+    {
+        return self::doSelectRange($minAlias, $maxAlias, 'COALESCE(pv.price, p.price)');
+    }
+
+    public static function selectProductRange($minAlias = 'min', $maxAlias = 'max')
+    {
+        return self::doSelectRange($minAlias, $maxAlias, 'p.price');
+    }
+
+    private static function doSelectRange($minAlias, $maxAlias, $priceField)
+    {
+        return function (QueryBuilder $qb) use ($minAlias, $maxAlias, $priceField) {
+            $select = Product::withVatAndDiscount($qb, $priceField);
+            $qb->joinVatsOnProducts();
+
+            $qb->andWhere("{$priceField} > 0");
+
+            return sprintf(
+                'min(%s) %s, max(%s) %s',
+                $select,
+                $minAlias,
+                $select,
+                $maxAlias
+            );
+        };
+    }
+}