From 85a5a20570b225e812b2c9859af2ec8ce60d386b Mon Sep 17 00:00:00 2001
From: sc0Vu <alk03073135@gmail.com>
Date: Mon, 29 Jan 2018 16:23:56 +0800
Subject: [PATCH] ShhFilterValidator.

---
 src/Validators/ShhFilterValidator.php | 55 +++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 src/Validators/ShhFilterValidator.php

diff --git a/src/Validators/ShhFilterValidator.php b/src/Validators/ShhFilterValidator.php
new file mode 100644
index 0000000..48f7faf
--- /dev/null
+++ b/src/Validators/ShhFilterValidator.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ * 
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ * 
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Validators;
+
+use Web3\Validators\IValidator;
+use Web3\Validators\QuantityValidator;
+use Web3\Validators\HexValidator;
+use Web3\Validators\IdentityValidator;
+
+class ShhFilterValidator
+{
+    /**
+     * validate
+     *
+     * @param array $value
+     * @return bool
+     */
+    public static function validate($value)
+    {
+        if (!is_array($value)) {
+            return false;
+        }
+        if (isset($value['to']) && IdentityValidator::validate($value['to']) === false) {
+            return false;
+        }
+        if (!isset($value['topics']) || !is_array($value['topics'])) {
+            return false;
+        }
+        foreach ($value['topics'] as $topic) {
+            if (is_array($topic)) {
+                foreach ($topic as $subTopic) {
+                    if (HexValidator::validate($subTopic) === false) {
+                        return false;
+                    }
+                }
+                continue;
+            }
+            if (HexValidator::validate($topic) === false) {
+                if (!is_null($topic)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+}
\ No newline at end of file