Vendor

vendor/nuwave/lighthouse/src/Pagination/Cursor.php

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+<?php
+
+namespace Nuwave\Lighthouse\Pagination;
+
+use Illuminate\Support\Arr;
+
+/**
+ * Encode and decode pagination cursors.
+ *
+ * Currently, the underlying pagination Query uses offset based navigation, so
+ * this basically just encodes an offset. This is enough to satisfy the constraints
+ * that Relay has, but not a clean permanent solution.
+ *
+ * TODO Implement actual cursor pagination https://github.com/nuwave/lighthouse/issues/311
+ */
+class Cursor
+{
+    /**
+     * Decode cursor from query arguments.
+     *
+     * If no 'after' argument is provided or the contents are not a valid base64 string,
+     * this will return 0. That will effectively reset pagination, so the user gets the
+     * first slice.
+     *
+     * @param  array  $args
+     * @return int
+     */
+    public static function decode(array $args): int
+    {
+        if ($cursor = Arr::get($args, 'after')) {
+            return (int) base64_decode($cursor);
+        }
+
+        return 0;
+    }
+
+    /**
+     * Encode the given offset to make the implementation opaque.
+     *
+     * @param  int  $offset
+     * @return string
+     */
+    public static function encode(int $offset): string
+    {
+        return base64_encode($offset);
+    }
+}