From d4122f116c937e0ec509d8cefe540146ec27a0cd Mon Sep 17 00:00:00 2001
From: "David T. Sadler" <davidtsadler@googlemail.com>
Date: Wed, 20 Oct 2021 20:59:55 +0100
Subject: Validate fields

---
 src/DTS/Validator.php | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/DTS/Validator.php

(limited to 'src/DTS/Validator.php')

diff --git a/src/DTS/Validator.php b/src/DTS/Validator.php
new file mode 100644
index 0000000..7629e3b
--- /dev/null
+++ b/src/DTS/Validator.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DTS;
+
+use DTS\Errors;
+use DTS\Validated;
+
+class Validator
+{
+    public Errors $errors;
+
+    public Validated $validated;
+
+    function __construct(array $request) {
+        $this->errors = new Errors();
+
+        $this->validated = new Validated();
+
+        $this->validateUrl($request['url'], 8, 512);
+
+        $this->validateTitle($request['title'], 8, 256);
+
+        $this->validateTag($request['tag'], 2, 8);
+    }
+
+    private function validateUrl(string $url, int $minLength, int $maxLength): void
+    {
+        $url = trim($url);
+
+        if (filter_var($url, FILTER_VALIDATE_URL) === false) {
+            $this->errors->add('url', 'Must be a URL');
+        }
+
+        if (strlen($url) < $minLength  || strlen($url) > $maxLength) {
+            $this->errors->add('url', "Must be between $minLength and $maxLength in characters in length");
+        }
+
+        if (!$this->errors->has('url')) {
+            $this->validated->url = $url;
+        }
+    }
+
+    private function validateTitle(string $title, int $minLength, int $maxLength): void
+    {
+        $title = trim($title);
+
+        if ($title === '') {
+            return;
+        }
+
+        if (strlen($title) < $minLength  || strlen($title) > $maxLength) {
+            $this->errors->add('title', "Must be between $minLength and $maxLength in characters in length");
+        }
+
+        if (!$this->errors->has('tite')) {
+            $this->validated->title = $title;
+        }
+    }
+
+    private function validateTag(string $tag, int $minLength, int $maxLength): void
+    {
+        $tag = trim($tag);
+
+        if ($tag === '') {
+            return;
+        }
+
+        if (strlen($tag) < $minLength  || strlen($tag) > $maxLength) {
+            $this->errors->add('tag', "Must be between $minLength and $maxLength in characters in length");
+        }
+        if (preg_match('/\W/', $tag) === 1) {
+            $this->errors->add('tag', 'May only contain word characters');
+        }
+
+        if (!$this->errors->has('tag')) {
+            $this->validated->tag = strtolower($tag);
+        }
+    }
+}
-- 
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