<?php

declare(strict_types=1);

namespace App\Services\TomTool;

use App\Models\Visitor;

final class VisitorCount
{
    
    public static function From()
    {
        
        // 如果以被设置，什么都不做
        // 如果未被设置，入库并保存cookie，注册用
        if (!isset($_COOKIE['VisitorFrom'])) {
            
            if (isset($_SERVER['HTTP_REFERER'])) {
                
                $sFrom = self::normalizeUrl($_SERVER['HTTP_REFERER']);
                
            } else {
                
                $sFrom = $_ENV['short_url'] . "/";
                
            }
            
            $oVisitorFrom = new Visitor();
            $oVisitorFrom->from = $sFrom;
            $oVisitorFrom->save();
            
            setcookie('VisitorFrom', $sFrom, (time() + (86400 * 30)), "/");
            
        }
        
    }
    
    public static function normalizeUrl($url) {
        
        $parsedUrl = parse_url($url);
        
        $host = isset($parsedUrl['host']) ? $parsedUrl['host'] : '';
        
        if (strpos($host, 'www.') === 0) {
            $host = substr($host, 4); // 去掉 'www.'
        }
        
        $path = isset($parsedUrl['path']) ? $parsedUrl['path'] : '';
        
        return $host . $path;
        
    }
    
}