MetaGer.php 41.2 KB
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<?php
namespace App;

use App;
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use App\lib\TextLanguageDetect\TextLanguageDetect;
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use Cache;
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use Illuminate\Http\Request;
use Jenssegers\Agent\Agent;
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use LaravelLocalization;
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use Log;
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use Predis\Connection\ConnectionException;
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use Redis;
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class MetaGer
{
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    # Einstellungen für die Suche
    protected $fokus;
    protected $eingabe;
    protected $q;
    protected $category;
    protected $time;
    protected $page;
    protected $lang;
    protected $cache = "";
    protected $site;
    protected $hostBlacklist   = [];
    protected $domainBlacklist = [];
    protected $stopWords       = [];
    protected $phrases         = [];
    protected $engines         = [];
    protected $results         = [];
    protected $ads             = [];
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    protected $products        = [];
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    protected $warnings        = [];
    protected $errors          = [];
    protected $addedHosts      = [];
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    protected $startCount      = 0;
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    protected $canCache        = false;
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    # Daten über die Abfrage
    protected $ip;
    protected $language;
    protected $agent;
    # Konfigurationseinstellungen:
    protected $sumaFile;
    protected $mobile;
    protected $resultCount;
    protected $sprueche;
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    protected $domainsBlacklisted = [];
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    protected $urlsBlacklisted    = [];
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    protected $url;
    protected $languageDetect;

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    public function __construct()
    {
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        # Timer starten
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        $this->starttime = microtime(true);
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        # Versuchen Blacklists einzulesen
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        if (file_exists(config_path() . "/blacklistDomains.txt") && file_exists(config_path() . "/blacklistUrl.txt")) {
            $tmp                      = file_get_contents(config_path() . "/blacklistDomains.txt");
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            $this->domainsBlacklisted = explode("\n", $tmp);
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            $tmp                      = file_get_contents(config_path() . "/blacklistUrl.txt");
            $this->urlsBlacklisted    = explode("\n", $tmp);
        } else {
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            Log::warning(trans('metaGer.blacklist.failed'));
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        }

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        # Parser Skripte einhängen
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        $dir = app_path() . "/Models/parserSkripte/";
        foreach (scandir($dir) as $filename) {
            $path = $dir . $filename;
            if (is_file($path)) {
                require $path;
            }
        }

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        # Spracherkennung starten
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        $this->languageDetect = new TextLanguageDetect();
        $this->languageDetect->setNameMode("2");
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        # Cachebarkeit testen
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        try {
            Cache::has('test');
            $this->canCache = true;
        } catch (ConnectionException $e) {
            $this->canCache = false;
        }
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    }
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    # Erstellt aus den gesammelten Ergebnissen den View
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    public function createView()
    {
        $viewResults = [];
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        # Wir extrahieren alle notwendigen Variablen und geben Sie an unseren View:
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        foreach ($this->results as $result) {
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            $viewResults[] = get_object_vars($result);
        }

        # Wir müssen natürlich noch den Log für die durchgeführte Suche schreiben:
        $this->createLogs();

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        if ($this->fokus === "bilder") {
            switch ($this->out) {
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                case 'results':
                    return view('metager3bilderresults')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('metager', $this)
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                        ->with('browser', (new Agent())->browser());
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                default:
                    return view('metager3bilder')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('metager', $this)
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                        ->with('browser', (new Agent())->browser());
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            }
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        } else {
            switch ($this->out) {
                case 'results':
                    return view('metager3results')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser());
                    break;
                case 'results-with-style':
                    return view('metager3')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('metager', $this)
                        ->with('suspendheader', "yes")
                        ->with('browser', (new Agent())->browser());
                    break;
                default:
                    return view('metager3')
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser());
                    break;
            }
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        }
    }

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    public function combineResults()
    {
        foreach ($this->engines as $engine) {
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            if (isset($engine->next)) {
                $this->next[] = $engine->next;
            }
            if (isset($engine->last)) {
                $this->last[] = $engine->last;
            }
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            foreach ($engine->results as $result) {
                if ($result->valid) {
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                    $this->results[] = $result;
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                }
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            }
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            foreach ($engine->ads as $ad) {
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                $this->ads[] = $ad;
            }
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            foreach ($engine->products as $product) {
                $this->products[] = $product;
            }
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        }
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        uasort($this->results, function ($a, $b) {
            if ($a->getRank() == $b->getRank()) {
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                return 0;
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            }

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            return ($a->getRank() < $b->getRank()) ? 1 : -1;
        });
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        # Validate Results
        $newResults = [];
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        foreach ($this->results as $result) {
            if ($result->isValid($this)) {
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                $newResults[] = $result;
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            }

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        }
        $this->results = $newResults;

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        # Boost implementation
        $this->results = $this->parseBoost($this->results);

        #Adgoal Implementation
        $this->results = $this->parseAdgoal($this->results);

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        $counter   = 0;
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        $firstRank = 0;
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        if (isset($this->startForwards)) {
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            $this->startCount = $this->startForwards;
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        } elseif (isset($this->startBackwards)) {
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            $this->startCount = $this->startBackwards - count($this->results) - 1;
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        } else {
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            $this->startCount = 0;
        }

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        foreach ($this->results as $result) {
            if ($counter === 0) {
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                $firstRank = $result->rank;
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            }

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            $counter++;
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            $result->number = $counter + $this->startCount;
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            $confidence     = 0;
            if ($firstRank > 0) {
                $confidence = $result->rank / $firstRank;
            } else {
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                $confidence = 0;
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            }

            if ($confidence > 0.65) {
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                $result->color = "#FF4000";
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            } elseif ($confidence > 0.4) {
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                $result->color = "#FF0080";
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            } elseif ($confidence > 0.2) {
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                $result->color = "#C000C0";
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            } else {
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                $result->color = "#000000";
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            }

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        }

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        if (LaravelLocalization::getCurrentLocale() === "en") {
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            $this->ads = [];
        }

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        $this->validated = false;
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        if (isset($this->password)) {
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            # Wir bieten einen bezahlten API-Zugriff an, bei dem dementsprechend die Werbung ausgeblendet wurde:
            # Aktuell ist es nur die Uni-Mainz. Deshalb überprüfen wir auch nur diese.
            $password = getenv('mainz');
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            $eingabe  = $this->eingabe;
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            $password = md5($eingabe . $password);
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            if ($this->password === $password) {
                $this->ads       = [];
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                $this->products  = [];
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                $this->validated = true;
            }
        }
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        if (count($this->results) <= 0) {
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            $this->errors[] = trans('metaGer.results.failed');
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        }
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        if ($this->canCache() && isset($this->next) && count($this->next) > 0 && count($this->results) > 0) {
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            $page       = $this->page + 1;
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            $this->next = [
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                'page'          => $page,
                'startForwards' => $this->results[count($this->results) - 1]->number,
                'engines'       => $this->next,
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            ];
            Cache::put(md5(serialize($this->next)), serialize($this->next), 60);
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        } else {
            $this->next = [];
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        }

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    }
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    public function parseBoost($results)
    {
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        foreach ($results as $result) {
            if (preg_match('/^(http[s]?\:\/\/)?(www.)?amazon\.de/', $result->anzeigeLink)) {
                if (preg_match('/\?/', $result->anzeigeLink)) {
                    $result->link .= '&tag=boostmg01-21';
                } else {
                    $result->link .= '?tag=boostmg01-21';
                }
                $result->partnershop = true;

            }
        }
        return $results;
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    }
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    public function parseAdgoal($results)
    {
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        $publicKey  = getenv('adgoal_public');
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        $privateKey = getenv('adgoal_private');
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        if ($publicKey === false) {
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            return $results;
        }
        $tldList = "";
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        try {
            foreach ($results as $result) {
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                $link = $result->anzeigeLink;
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                if (strpos($link, "http") !== 0) {
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                    $link = "http://" . $link;
                }
                $tldList .= parse_url($link, PHP_URL_HOST) . ",";
                $result->tld = parse_url($link, PHP_URL_HOST);
            }
            $tldList = rtrim($tldList, ",");

            # Hashwert
            $hash = md5("meta" . $publicKey . $tldList . "GER");

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            # Query
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            $query = urlencode($this->q);

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            $link   = "https://api.smartredirect.de/api_v2/CheckForAffiliateUniversalsearchMetager.php?p=" . $publicKey . "&k=" . $hash . "&tld=" . $tldList . "&q=" . $query;
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            $answer = json_decode(file_get_contents($link));

            # Nun müssen wir nur noch die Links für die Advertiser ändern:
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            foreach ($answer as $el) {
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                $hoster = $el[0];
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                $hash   = $el[1];
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                foreach ($results as $result) {
                    if ($hoster === $result->tld) {
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                        # Hier ist ein Advertiser:
                        # Das Logo hinzufügen:
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                        if ($result->image !== "") {
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                            $result->logo = "https://img.smartredirect.de/logos_v2/60x30/" . $hash . ".gif";
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                        } else {
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                            $result->image = "https://img.smartredirect.de/logos_v2/120x60/" . $hash . ".gif";
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                        }

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                        # Den Link hinzufügen:
                        $publicKey = $publicKey;
                        $targetUrl = $result->anzeigeLink;
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                        if (strpos($targetUrl, "http") !== 0) {
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                            $targetUrl = "http://" . $targetUrl;
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                        }

                        $gateHash            = md5($targetUrl . $privateKey);
                        $newLink             = "https://api.smartredirect.de/api_v2/ClickGate.php?p=" . $publicKey . "&k=" . $gateHash . "&url=" . urlencode($targetUrl) . "&q=" . $query;
                        $result->link        = $newLink;
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                        $result->partnershop = true;
                    }
                }
            }
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        } catch (\ErrorException $e) {
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            return $results;
        }

        return $results;
    }
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    /*
     * Die Erstellung der Suchmaschinen bis die Ergebnisse da sind mit Unterfunktionen
     */

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    public function createSearchEngines(Request $request)
    {
        if (!$request->has("eingabe")) {
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            return;
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        }
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        # Überprüfe, welche Sumas eingeschaltet sind
        $xml                  = simplexml_load_file($this->sumaFile);
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        $enabledSearchengines = [];
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        $overtureEnabled      = false;
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        $sumaCount            = 0;
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        $sumas                = $xml->xpath("suma");
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        /* Erstellt die Liste der eingestellten Sumas
         * Der einzige Unterschied bei angepasstem Suchfokus ist, dass nicht nach den Typen einer Suma, sondern den im Request mitgegebenen Typen entschieden wird
         * Ansonsten wird genau das selbe geprüft und gemacht:
         * Handelt es sich um spezielle Suchmaschinen die immer an sein müssen
         * Wenn es Overture ist vermerken dass Overture an ist
         * Suma Zähler erhöhen
         * Zu Liste hinzufügen
         */
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        foreach ($sumas as $suma) {
            if ($this->fokus === "angepasst") {
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                if ($request->has($suma["name"])
                    || ($this->fokus !== "bilder"
                        && ($suma["name"]->__toString() === "qualigo"
                            || $suma["name"]->__toString() === "similar_product_ads"
                            || (!$overtureEnabled && $suma["name"]->__toString() === "overtureAds")
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                            || $suma["name"]->__toString() == "rlvproduct"
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                        )
                    )
                ) {

                    if (!(isset($suma['disabled']) && $suma['disabled']->__toString() === "1")) {
                        if ($suma["name"]->__toString() === "overture" || $suma["name"]->__toString() === "overtureAds") {
                            $overtureEnabled = true;
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                        }
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                        if ($suma["name"]->__toString() !== "qualigo" && $suma["name"]->__toString() !== "similar_product_ads" && $suma["name"]->__toString() !== "overtureAds") {
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                            $sumaCount += 1;
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                        }
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                        $enabledSearchengines[] = $suma;
                    }
                }
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            } else {
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                $types = explode(",", $suma["type"]);
                if (in_array($this->fokus, $types)
                    || ($this->fokus !== "bilder"
                        && ($suma["name"]->__toString() === "qualigo"
                            || $suma["name"]->__toString() === "similar_product_ads"
                            || (!$overtureEnabled && $suma["name"]->__toString() === "overtureAds")
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                            || $suma["name"]->__toString() == "rlvproduct"
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                        )
                    )
                ) {
                    if (!(isset($suma['disabled']) && $suma['disabled']->__toString() === "1")) {
                        if ($suma["name"]->__toString() === "overture" || $suma["name"]->__toString() === "overtureAds") {
                            $overtureEnabled = true;
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                        }
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                        if ($suma["name"]->__toString() !== "qualigo" && $suma["name"]->__toString() !== "similar_product_ads" && $suma["name"]->__toString() !== "overtureAds") {
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                            $sumaCount += 1;
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                        }
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                        $enabledSearchengines[] = $suma;
                    }
                }
            }
        }

        # Sonderregelung für alle Suchmaschinen, die zu den Minisuchern gehören. Diese können alle gemeinsam über einen Link abgefragt werden
        $subcollections = [];
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        $tmp            = [];
        foreach ($enabledSearchengines as $engine) {
            if (isset($engine['minismCollection'])) {
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                $subcollections[] = $engine['minismCollection']->__toString();
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            } else {
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                $tmp[] = $engine;
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            }

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        }
        $enabledSearchengines = $tmp;
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        if (sizeof($subcollections) > 0) {
            $count                        = sizeof($subcollections) * 10;
            $minisucherEngine             = $xml->xpath('suma[@name="minism"]')[0];
            $subcollections               = urlencode("(" . implode(" OR ", $subcollections) . ")");
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            $minisucherEngine["formData"] = str_replace("<<SUBCOLLECTIONS>>", $subcollections, $minisucherEngine["formData"]);
            $minisucherEngine["formData"] = str_replace("<<COUNT>>", $count, $minisucherEngine["formData"]);
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            $enabledSearchengines[]       = $minisucherEngine;
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        }

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        if ($sumaCount <= 0) {
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            $this->errors[] = trans('metaGer.settings.noneSelected');
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        }
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        $engines = [];
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        # Wenn eine Sitesearch durchgeführt werden soll, überprüfen wir ob eine der Suchmaschinen überhaupt eine Sitesearch unterstützt
        $siteSearchFailed = $this->checkCanNotSitesearch($enabledSearchengines);
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        $typeslist = [];
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        $counter   = 0;
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        if ($request->has('next') && Cache::has($request->input('next')) && unserialize(Cache::get($request->input('next')))['page'] > 1) {
            $next       = unserialize(Cache::get($request->input('next')));
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            $this->page = $next['page'];
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            $engines    = $next['engines'];
            if (isset($next['startForwards'])) {
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                $this->startForwards = $next['startForwards'];
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            }

            if (isset($next['startBackwards'])) {
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                $this->startBackwards = $next['startBackwards'];
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            }

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        } else {
            foreach ($enabledSearchengines as $engine) {
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                # Wenn diese Suchmaschine gar nicht eingeschaltet sein soll
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                if (!$siteSearchFailed && strlen($this->site) > 0 && (!isset($engine['hasSiteSearch']) || $engine['hasSiteSearch']->__toString() === "0")) {
                    continue;
                }
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                # Setze Pfad zu Parser
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                $path = "App\Models\parserSkripte\\" . ucfirst($engine["package"]->__toString());
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                # Prüfe ob Parser vorhanden
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                if (!file_exists(app_path() . "/Models/parserSkripte/" . ucfirst($engine["package"]->__toString()) . ".php")) {
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                    Log::error(trans('metaGer.engines.noParser', ['engine' => $engine["name"]]));
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                    continue;
                }
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                # Es wird versucht die Suchengine zu erstellen
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                $time = microtime();
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                try {
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                    $tmp = new $path($engine, $this);
                } catch (\ErrorException $e) {
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                    Log::error(trans('metaGer.engines.cantQuery', ['engine' => $engine["name"], 'error' => var_dump($e)]));
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                    continue;
                }
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                # Ausgabe bei Debug-Modus
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                if ($tmp->enabled && isset($this->debug)) {
                    $this->warnings[] = $tmp->service . "   Connection_Time: " . $tmp->connection_time . "    Write_Time: " . $tmp->write_time . " Insgesamt:" . ((microtime() - $time) / 1000);
                }

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                # Wenn die neu erstellte Engine eingeschaltet ist, wird sie der Liste hinzugefügt
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                if ($tmp->isEnabled()) {
                    $engines[] = $tmp;
                }
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            }
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        }
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        # Wir starten die Suche manuell:
        foreach ($engines as $engine) {
            $engine->startSearch($this);
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        }
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        $this->adjustFocus($sumas, $enabledSearchengines);

        /* Nun passiert ein elementarer Schritt.
         * Wir warten auf die Antwort der Suchmaschinen, da wir vorher nicht weiter machen können.
         * Aber natürlich nicht ewig.
         * Die Verbindung steht zu diesem Zeitpunkt und auch unsere Request wurde schon gesendet.
         * Wir geben der Suchmaschine nun bis zu 500ms Zeit zu antworten.
         */

        # Wir zählen die Suchmaschinen, die durch den Cache beantwortet wurden:
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        $enginesToLoad = [];
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        $canBreak      = false;
        foreach ($engines as $engine) {
            if ($engine->cached) {
                if ($overtureEnabled && ($engine->name === "overture" || $engine->name === "overtureAds")) {
                    $canBreak = true;
                }
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            } else {
                # Das Array zählt einerseits die Suchmaschinen, auf die wir warten und andererseits
                # welche Suchmaschinen nicht rechtzeitig geantwortet haben.
                $enginesToLoad[$engine->name] = false;
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            }
        }

        $this->waitForResults($enginesToLoad, $overtureEnabled, $canBreak);

        $this->retrieveResults($engines);
    }

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    # Passt den Suchfokus an, falls für einen Fokus genau alle vorhandenen Sumas eingeschaltet sind
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    public function adjustFocus($sumas, $enabledSearchengines)
    {
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        # Findet für alle Foki die enthaltenen Sumas
        $foki = []; # [fokus][suma] => [suma]
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        foreach ($sumas as $suma) {
            if ((!isset($suma['disabled']) || $suma['disabled'] === "") && (!isset($suma['userSelectable']) || $suma['userSelectable']->__toString() === "1")) {
                if (isset($suma['type'])) {
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                    # Wenn foki für diese Suchmaschine angegeben sind
                    $focuses = explode(",", $suma['type']->__toString());
                    foreach ($focuses as $foc) {
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                        if (isset($suma['minismCollection'])) {
                            $foki[$foc][] = "minism";
                        } else {
                            $foki[$foc][] = $suma['name']->__toString();
                        }
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                    }
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                } else {
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                    # Wenn keine foki für diese Suchmaschine angegeben sind
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                    if (isset($suma['minismCollection'])) {
                        $foki["andere"][] = "minism";
                    } else {
                        $foki["andere"][] = $suma['name']->__toString();
                    }
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                }
            }
        }

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        # Findet die Namen der aktuell eingeschalteten Sumas
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        $realEngNames = [];
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        foreach ($enabledSearchengines as $realEng) {
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            $nam = $realEng["name"]->__toString();
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            if ($nam !== "qualigo" && $nam !== "overtureAds") {
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                $realEngNames[] = $nam;
            }
        }
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        # Anschließend werden diese beiden Listen verglichen (jeweils eine der Fokuslisten für jeden Fokus), um herauszufinden ob sie vielleicht identisch sind. Ist dies der Fall, so hat der Nutzer anscheinend Suchmaschinen eines kompletten Fokus eingestellt. Der Fokus wird dementsprechend angepasst.
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        foreach ($foki as $fok => $engines) {
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            $isFokus      = true;
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            $fokiEngNames = [];
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            foreach ($engines as $eng) {
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                $fokiEngNames[] = $eng;
            }
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            # Jede eingeschaltete Engine ist für diesen Fokus geeignet
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            foreach ($fokiEngNames as $fen) {
                if (!in_array($fen, $realEngNames)) {
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                    $isFokus = false;
                }
            }
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            # Jede im Fokus erwartete Engine ist auch eingeschaltet
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            foreach ($realEngNames as $ren) {
                if (!in_array($ren, $fokiEngNames)) {
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                    $isFokus = false;
                }
            }
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            # Wenn die Listen identisch sind, setze den Fokus um
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            if ($isFokus) {
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                $this->fokus = $fok;
            }
        }
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    }
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    public function checkCanNotSitesearch($enabledSearchengines)
    {
        if (strlen($this->site) > 0) {
            $enginesWithSite = 0;
            foreach ($enabledSearchengines as $engine) {
                if (isset($engine['hasSiteSearch']) && $engine['hasSiteSearch']->__toString() === "1") {
                    $enginesWithSite++;
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                }
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            }
            if ($enginesWithSite === 0) {
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                $this->errors[] = trans('metaGer.sitesearch.failed', ['site' => $this->site, 'searchLink' => $this->generateSearchLink("web", false)]);
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                return true;
            } else {
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                $this->warnings[] = trans('metaGer.sitesearch.success', ['site' => $this->site]);
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                return false;
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            }
        }
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    }

    public function waitForResults($enginesToLoad, $overtureEnabled, $canBreak)
    {
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        $loadedEngines = 0;
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        $timeStart     = microtime(true);
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        # Auf wie viele Suchmaschinen warten wir?
        $engineCount = count($enginesToLoad);

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        while (true) {
            $time          = (microtime(true) - $timeStart) * 1000;
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            $loadedEngines = intval(Redis::hlen('search.' . $this->getHashCode()));
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            if ($overtureEnabled && (Redis::hexists('search.' . $this->getHashCode(), 'overture') || Redis::hexists('search.' . $this->getHashCode(), 'overtureAds'))) {
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                $canBreak = true;
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            }
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            # Abbruchbedingung
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            if ($time < 500) {
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                if (($engineCount === 0 || $loadedEngines >= $engineCount) && $canBreak) {
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                    break;
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                }

            } elseif ($time >= 500 && $time < $this->time) {
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                if (($engineCount === 0 || ($loadedEngines / ($engineCount * 1.0)) >= 0.8) && $canBreak) {
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                    break;
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                }

            } else {
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                break;
            }
            usleep(50000);
        }
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        # Wir haben nun so lange wie möglich gewartet. Wir registrieren nun noch die Suchmaschinen, die geanwortet haben.
        $answered = Redis::hgetall('search.' . $this->getHashCode());
        foreach ($answered as $key => $value) {
            $enginesToLoad[$key] = true;
        }
        $this->enginesToLoad = $enginesToLoad;
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    }
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    public function retrieveResults($engines)
    {
        # Von geladenen Engines die Ergebnisse holen
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        foreach ($engines as $engine) {
            if (!$engine->loaded) {
                try {
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                    $engine->retrieveResults($this);
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                } catch (\ErrorException $e) {
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                    Log::error($e);
                }
            }
        }
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        # Nicht fertige Engines verwefen
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        foreach ($engines as $engine) {
            if (!$engine->loaded) {
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                $engine->shutdown();
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            }
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        }

        $this->engines = $engines;
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    }

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    /*
     * Ende
     */

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    public function parseFormData(Request $request)
    {
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        # Sichert, dass der request in UTF-8 formatiert ist
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        if ($request->input('encoding', '') !== "utf8") {
            # In früheren Versionen, als es den Encoding Parameter noch nicht gab, wurden die Daten in ISO-8859-1 übertragen
            $input = $request->all();
            foreach ($input as $key => $value) {
                $input[$key] = mb_convert_encoding("$value", "UTF-8", "ISO-8859-1");
            }
            $request->replace($input);
        }
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        $this->url = $request->url();
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        # Zunächst überprüfen wir die eingegebenen Einstellungen:
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        # Fokus
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        $this->fokus = $request->input('focus', 'web');
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        # Suma-File
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        if (App::isLocale("en")) {
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            $this->sumaFile = config_path() . "/sumas.xml";
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        } else {
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            $this->sumaFile = config_path() . "/sumas.xml";
        }
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        if (!file_exists($this->sumaFile)) {
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            die(trans('metaGer.formdata.cantLoad'));
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        }
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        # Sucheingabe
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        $this->eingabe = trim($request->input('eingabe', ''));
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        if (strlen($this->eingabe) === 0) {
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            $this->warnings[] = trans('metaGer.formdata.noSearch');
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        }
        $this->q = $this->eingabe;
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        # IP
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        $this->ip = $request->ip();
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        # Language
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        if (isset($_SERVER['HTTP_LANGUAGE'])) {
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            $this->language = $_SERVER['HTTP_LANGUAGE'];
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        } else {
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            $this->language = "";
        }
        # Category
        $this->category = $request->input('category', '');
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        # Request Times
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        $this->time = $request->input('time', 1000);
        # Page
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        $this->page = 1;
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        # Lang
        $this->lang = $request->input('lang', 'all');
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        if ($this->lang !== "de" && $this->lang !== "en" && $this->lang !== "all") {
            $this->lang = "all";
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        }
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        $this->agent  = new Agent();
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        $this->mobile = $this->agent->isMobile();
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        # Sprüche
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        $this->sprueche = $request->input('sprueche', 'off');
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        if ($this->sprueche === "off") {
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            $this->sprueche = true;
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        } else {
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            $this->sprueche = false;
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        }
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        # Ergebnisse pro Seite:
        $this->resultCount = $request->input('resultCount', '20');
        # Manchmal müssen wir Parameter anpassen um den Sucheinstellungen gerecht zu werden:
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        if ($request->has('dart')) {
            $this->time       = 10000;
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            $this->warnings[] = trans('metaGer.formdata.dartEurope');
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        }
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        if ($this->time <= 500 || $this->time > 20000) {
            $this->time = 1000;
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        }
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        if ($request->has('minism') && ($request->has('fportal') || $request->has('harvest'))) {
            $input    = $request->all();
            $newInput = [];
            foreach ($input as $key => $value) {
                if ($key !== "fportal" && $key !== "harvest") {
                    $newInput[$key] = $value;
                }
            }
            $request->replace($newInput);
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        }
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        if (App::isLocale("en")) {
            $this->sprueche = "off";
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        }
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        if ($this->resultCount <= 0 || $this->resultCount > 200) {
            $this->resultCount = 1000;
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        }
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        if ($request->has('onenewspageAll') || $request->has('onenewspageGermanyAll')) {
            $this->time  = 5000;
            $this->cache = "cache";
        }
        if ($request->has('tab')) {
            if ($request->input('tab') === "off") {
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                $this->tab = "_blank";
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            } else {
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                $this->tab = "_self";
            }
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        } else {
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            $this->tab = "_blank";
        }
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        if ($request->has('password')) {
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            $this->password = $request->input('password');
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        }
        if ($request->has('quicktips')) {
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            $this->quicktips = false;
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        } else {
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            $this->quicktips = true;
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        }
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        $this->out = $request->input('out', "html");
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        # Standard output format html
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        if ($this->out !== "html" && $this->out !== "json" && $this->out !== "results" && $this->out !== "results-with-style") {
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            $this->out = "html";
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        }
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        $this->request = $request;
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    }

    public function checkSpecialSearches(Request $request)
    {
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        # Site Search
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        if (preg_match("/(.*)\bsite:(\S+)(.*)/si", $this->q, $match)) {
            $this->site = $match[2];
            $this->q    = $match[1] . $match[3];
        }
        if ($request->has('site')) {
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            $this->site = $request->input('site');
        }
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        # Host Blacklisting
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        # Wenn die Suchanfrage um das Schlüsselwort "-host:*" ergänzt ist, sollen bestimmte Hosts nicht eingeblendet werden
        while (preg_match("/(.*)(^|\s)-host:(\S+)(.*)/si", $this->q, $match)) {
            $this->hostBlacklist[] = $match[3];
            $this->q               = $match[1] . $match[4];
        }
        if (sizeof($this->hostBlacklist) > 0) {
            $hostString = "";
            foreach ($this->hostBlacklist as $host) {
                $hostString .= $host . ", ";
            }
            $hostString       = rtrim($hostString, ", ");
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            $this->warnings[] = trans('metaGer.formdata.hostBlacklist', ['host' => $hostString]);
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        }
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        # Domain Blacklisting
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        # Wenn die Suchanfrage um das Schlüsselwort "-domain:*" ergänzt ist, sollen bestimmte Domains nicht eingeblendet werden
        while (preg_match("/(.*)(^|\s)-domain:(\S+)(.*)/si", $this->q, $match)) {
            $this->domainBlacklist[] = $match[3];
            $this->q                 = $match[1] . $match[4];
        }
        if (sizeof($this->domainBlacklist) > 0) {
            $domainString = "";
            foreach ($this->domainBlacklist as $domain) {
                $domainString .= $domain . ", ";
            }
            $domainString     = rtrim($domainString, ", ");
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            $this->warnings[] = trans('metaGer.formdata.domainBlacklist', ['domain' => $domainString]);
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        }

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        # Stopwords
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        # Alle mit "-" gepräfixten Worte sollen aus der Suche ausgeschlossen werden.
        while (preg_match("/(.*)(^|\s)-(\S+)(.*)/si", $this->q, $match)) {
            $this->stopWords[] = $match[3];
            $this->q           = $match[1] . $match[4];
        }
        if (sizeof($this->stopWords) > 0) {
            $stopwordsString = "";
            foreach ($this->stopWords as $stopword) {
                $stopwordsString .= $stopword . ", ";
            }
            $stopwordsString  = rtrim($stopwordsString, ", ");
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            $this->warnings[] = trans('metaGer.formdata.stopwords', ['stopwords' => $stopwordsString]);
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        }

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        # Phrasensuche
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        $p   = "";
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        $tmp = $this->q;
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        while (preg_match("/(.*)\"(.+)\"(.*)/si", $tmp, $match)) {
            $tmp             = $match[1] . $match[3];
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            $this->phrases[] = strtolower($match[2]);
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        }
        foreach ($this->phrases as $phrase) {
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            $p .= "\"$phrase\", ";
        }
        $p = rtrim($p, ", ");
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        if (sizeof($this->phrases) > 0) {
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            $this->warnings[] = trans('metaGer.formdata.phrase', ['phrase' => $p]);
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        }
    }

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    public function nextSearchLink()
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    {
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        if (isset($this->next) && isset($this->next['engines']) && count($this->next['engines']) > 0) {
            $requestData         = $this->request->except(['page', 'out']);
            $requestData['next'] = md5(serialize($this->next));
            $link                = action('MetaGerSearch@search', $requestData);
        } else {
            $link = "#";
        }
        return $link;
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    }

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    public function rankAll()
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    {
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        foreach ($this->engines as $engine) {
            $engine->rank($this);
        }
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    }

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# Hilfsfunktionen
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    public function removeInvalids()
    {
        $results = [];
        foreach ($this->results as $result) {
            if ($result->isValid($this)) {
                $results[] = $result;
            }

        }
    }

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    public function showQuicktips()
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    {
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        return $this->quicktips;
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    }

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    public function popAd()
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    {
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        if (count($this->ads) > 0) {
            return get_object_vars(array_shift($this->ads));
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        } else {
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            return null;
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        }
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