1 files changed, 45 insertions, 0 deletions
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