From 04d30cfe16e11140c8efb22afd61f2386c35cd87 Mon Sep 17 00:00:00 2001
From: cflip <36554078+cflip@users.noreply.github.com>
Date: Tue, 20 Jul 2021 17:25:03 -0600
Subject: Handle input validation in abstract Form class

---
 includes/form/Form.php | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 includes/form/Form.php

(limited to 'includes/form/Form.php')

diff --git a/includes/form/Form.php b/includes/form/Form.php
new file mode 100644
index 0000000..3f1bd62
--- /dev/null
+++ b/includes/form/Form.php
@@ -0,0 +1,45 @@
+<?php
+
+abstract class Form
+{
+	private $errors = array();
+	private $success = true;
+
+	protected function report_error($error_string)
+	{
+		$this->errors[] = $error_string;
+		$this->success = false;
+	}
+
+	public function success(): bool
+	{
+		return $this->success;
+	}
+
+	public function html_error_list(): string
+	{
+		if ($this->success)
+			return "";
+
+		if (count($this->errors) > 1) {
+			$result = '<ul>';
+			foreach ($this->errors as $err) {
+				$result .= '<li>' . $err . '</li>';
+			}
+			$result .= '</ul>';
+			return $result;
+		} else {
+			return $this->errors[0];
+		}
+	}
+
+	public function on_success(Closure $param)
+	{
+		if ($this->success()) {
+			$param();
+	    } else {
+			echo '<p>Please check the following problems:</p>';
+			trigger_error($this->html_error_list());
+		}
+	}
+}
\ No newline at end of file
-- 
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