<?php

/**
 * Name: Telegram Link Fixer
 * Description: Rewrite the <link> from the feed with one extracted from <description>.
 * Author: Your Name
 * Version: 1.0
 */

class TelegramLinkFixerExtension extends Minz_Extension
{
    /**
     * Called automatically at extension load-time. Set up hooks here.
     */
    public function init()
    {
        // Hook into FreshRSS just before each entry is saved to database:
        $this->registerHook('entry_before_insert', array($this, 'fixLink'));
    }

    /**
     * Our main function to rewrite the <link> from <description>.
     */
    public static function fixLink($entry)
    {
        // Check if it's a telegram link
        $link = $entry->link();
        if (strpos($link, 't.me') === false) {
            return;  // skip if not a telegram link
        }

        $description = $entry->description();
        if (empty($description)) {
            return;
        }

        // Look specifically for Telegraph links
        if (preg_match('/<a[^>]*?href="(https:\/\/telegra\.ph\/[^"]+)"[^>]*>Telegraph<\/a>/i', $description, $matches)) {
            $telegraphLink = $matches[1];
            if (!empty($telegraphLink)) {
                $entry->_link($telegraphLink);
            }
        }
    }
}