Query Namespace (#2645)

Move shared classes in search and filter namespaces to a new query namespace

src/Query/ApplyQueryParametersTrait.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Query;
+
+use Illuminate\Support\Str;
+
+trait ApplyQueryParametersTrait
+{
+    /**
+     * Apply sort criteria to a discussion query.
+     *
+     * @param AbstractQueryState $query
+     * @param array $sort
+     */
+    protected function applySort(AbstractQueryState $query, array $sort = null)
+    {
+        $sort = $sort ?: $query->getDefaultSort();
+
+        if (is_callable($sort)) {
+            $sort($query->getQuery());
+        } else {
+            foreach ($sort as $field => $order) {
+                if (is_array($order)) {
+                    foreach ($order as $value) {
+                        $query->getQuery()->orderByRaw(Str::snake($field).' != ?', [$value]);
+                    }
+                } else {
+                    $query->getQuery()->orderBy(Str::snake($field), $order);
+                }
+            }
+        }
+    }
+
+    /**
+     * @param AbstractQueryState $query
+     * @param int $offset
+     */
+    protected function applyOffset(AbstractQueryState $query, $offset)
+    {
+        if ($offset > 0) {
+            $query->getQuery()->skip($offset);
+        }
+    }
+
+    /**
+     * @param AbstractQueryState $query
+     * @param int|null $limit
+     */
+    protected function applyLimit(AbstractQueryState $query, $limit)
+    {
+        if ($limit > 0) {
+            $query->getQuery()->take($limit);
+        }
+    }
+}