<?php /* Copyright (c) 2024 Freya Murphy */
class _comments_model extends Model {

	private $profanity;

	function __construct()
	{
		$this->profanity = $this->load_profanity();
	}

	private function load_profanity()
	{
		$path = ASSET_ROOT . '/profanity.txt';
		$str = file_get_contents($path);
		$lines = explode("\n", $str);

		$regex = '/(';
		foreach ($lines as $idx => $line) {
			if ($line == '') {
				continue;
			}
			if ($idx != 0) {
				$regex .= '|';
			}
			$regex .= $line;
		}
		$regex .= ')/';

		return $regex;
	}

	public function is_vulgar($text)
	{
		return preg_match($this->profanity, $text);
	}

	public function get_comments($page)
	{
		$ip = $this->get_ip();
		$query = $this->db()
			->select('*')
			->from('website.comment c')
			->where('c.page')
			->eq($page)
			->query('AND (
				(c.vulgar IS FALSE) OR
				(c.vulgar IS TRUE and c.ip = ?)
			)')
			->order_by('c.id', 'DESC');
		$result = $query->rows($ip);
		return $result;
	}

	public function post_comment($author, $content, $page, $vulgar)
	{
		$ip = $this->get_ip();
		return $this->db()
			->insert_into('website.comment',
				'author', 'content', 'page', 'ip', 'vulgar')
			->values($author, $content, $page, $ip, $vulgar)
			->execute();
	}

	public function get_ip(): ?string
	{
		$headers = array (
				'HTTP_CLIENT_IP',
				'HTTP_X_FORWARDED_FOR',
				'HTTP_X_FORWARDED',
				'HTTP_FORWARDED_FOR',
				'HTTP_FORWARDED',
				'HTTP_X_REAL_IP',
				'REMOTE_ADDR'
		);
		foreach ($headers as $header) {
				if (isset($_SERVER[$header]))
						return $_SERVER[$header];
		}
		return NULL;
	}

}