MetaGer.php

<?php
namespace App;

use App;
use Cache;
use Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Redis;
use Jenssegers\Agent\Agent;
use LaravelLocalization;
use Log;
use Predis\Connection\ConnectionException;

class MetaGer
{
    # 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 = [];
    private $urlBlacklist = [];
    protected $stopWords = [];
    protected $phrases = [];
    protected $engines = [];
    protected $results = [];
    protected $ads = [];
    protected $warnings = [];
    protected $errors = [];
    protected $addedHosts = [];
    protected $startCount = 0;
    protected $canCache = false;
    # Daten über die Abfrage$
    protected $ip;
    protected $useragent;
    protected $language;
    protected $agent;
    protected $apiKey = "";
    protected $apiAuthorized = false;
    # Konfigurationseinstellungen:
    protected $sumaFile;
    protected $mobile;
    protected $resultCount;
    protected $sprueche;
    protected $maps;
    protected $newtab;
    protected $domainsBlacklisted = [];
    protected $urlsBlacklisted = [];
    protected $url;
    protected $languageDetect;
    protected $verificationId;
    protected $verificationCount;

    public function __construct()
    {
        # Timer starten
        $this->starttime = microtime(true);
        # Versuchen Blacklists einzulesen
        if (file_exists(config_path() . "/blacklistDomains.txt") && file_exists(config_path() . "/blacklistUrl.txt")) {
            $tmp = file_get_contents(config_path() . "/blacklistDomains.txt");
            $this->domainsBlacklisted = explode("\n", $tmp);
            $tmp = file_get_contents(config_path() . "/blacklistUrl.txt");
            $this->urlsBlacklisted = explode("\n", $tmp);
        } else {
            Log::warning("Achtung: Eine, oder mehrere Blacklist Dateien, konnten nicht geöffnet werden");
        }

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

        # Cachebarkeit testen
        try {
            Cache::has('test');
            $this->canCache = true;
        } catch (ConnectionException $e) {
            $this->canCache = false;
        }
    }

    # Erstellt aus den gesammelten Ergebnissen den View
    public function createView($quicktipResults = null)
    {
        # Hiermit werden die evtl. ausgewählten SuMas extrahiert, damit die Input-Boxen richtig gesetzt werden können
        $focusPages = [];

        foreach ($this->request->all() as $key => $value) {
            if ($value === 'on') {
                $focusPages[] = str_replace('param_', '', str_replace('engine_', '', $key));
            }
        }

        $viewResults = [];
        # Wir extrahieren alle notwendigen Variablen und geben Sie an unseren View:
        foreach ($this->results as $result) {
            $viewResults[] = get_object_vars($result);
        }
        # Wir müssen natürlich noch den Log für die durchgeführte Suche schreiben:
        $this->createLogs();
        if ($this->fokus === "bilder") {
            switch ($this->out) {
                case 'results':
                    return view('resultpages.results_images')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser());
                default:
                    return view('resultpages.resultpage_images')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser());
            }
        } else {
            switch ($this->out) {
                case 'results':
                    return view('resultpages.results')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser())
                        ->with('fokus', $this->fokus);
                    break;
                case 'results-with-style':
                    return view('resultpages.resultpage')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('suspendheader', "yes")
                        ->with('browser', (new Agent())->browser())
                        ->with('fokus', $this->fokus);
                    break;
                case 'rich':
                    return view('resultpages.metager3rich')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser())
                        ->with('fokus', $this->fokus);
                    break;
                case 'rss20':
                    return view('resultpages.metager3resultsrss20')
                        ->with('results', $viewResults)
                        ->with('eingabe', $this->eingabe)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('resultcount', sizeof($viewResults))
                        ->with('fokus', $this->fokus);
                    break;
                case 'atom10':
                    return response()->view('resultpages.metager3resultsatom10', ['results' => $viewResults, 'eingabe' => $this->eingabe, 'metager' => $this, 'resultcount' => sizeof($viewResults)])
                        ->header('Content-Type', 'application/xml');
                    break;
                case 'result-count':
                    # Wir geben die Ergebniszahl und die benötigte Zeit zurück:
                    return sizeof($viewResults) . ";" . round((microtime(true) - $this->starttime), 2);
                    break;
                default:
                    return view('resultpages.resultpage')
                        ->with('eingabe', $this->eingabe)
                        ->with('focusPages', $focusPages)
                        ->with('mobile', $this->mobile)
                        ->with('warnings', $this->warnings)
                        ->with('errors', $this->errors)
                        ->with('apiAuthorized', $this->apiAuthorized)
                        ->with('metager', $this)
                        ->with('browser', (new Agent())->browser())
                        ->with('quicktips', $quicktipResults)
                        ->with('resultcount', count($this->results))
                        ->with('focus', $this->fokus);
                    break;
            }
        }
    }

    public function prepareResults()
    {
        $engines = $this->engines;

        // combine
        $combinedResults = $this->combineResults($engines);

        # Wir bestimmen die Sprache eines jeden Suchergebnisses
        $this->results = $this->addLangCodes($this->results);

        // sort
        //$sortedResults = $this->sortResults($engines);
        // filter
        // augment (boost&adgoal)
        // authorize
        if ($this->apiKey) {
            $this->apiAuthorized = $this->authorize($this->apiKey);
        }
        // misc (WiP)
        if ($this->fokus == "nachrichten") {
            $this->results = array_filter($this->results, function ($v, $k) {
                return !is_null($v->getRank());
            }, ARRAY_FILTER_USE_BOTH);
            uasort($this->results, function ($a, $b) {
                $datea = $a->getDate();
                $dateb = $b->getDate();
                return $dateb - $datea;
            });
        } else {
            uasort($this->results, function ($a, $b) {
                if ($a->getRank() == $b->getRank()) {
                    return 0;
                }

                return ($a->getRank() < $b->getRank()) ? 1 : -1;
            });
        }

        # Validate Results
        $newResults = [];
        foreach ($this->results as $result) {
            if ($result->isValid($this)) {
                $newResults[] = $result;
            }

        }
        $this->results = $newResults;

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

        # Human Verification
        $this->results = $this->humanVerification($this->results);
        $this->ads = $this->humanVerification($this->ads);

        $counter = 0;
        $firstRank = 0;

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

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

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

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

        }

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

        if ($this->validated) {
            $this->ads = [];
            $this->maps = false;
        }

        if (count($this->results) <= 0) {
            $this->errors[] = trans('metaGer.results.failed');
        }

        if ($this->canCache() && isset($this->next) && count($this->next) > 0 && count($this->results) > 0) {
            $page = $this->page + 1;
            $this->next = [
                'page' => $page,
                'startForwards' => $this->results[count($this->results) - 1]->number,
                'engines' => $this->next,
            ];
            Cache::put(md5(serialize($this->next)), serialize($this->next), 60);
        } else {
            $this->next = [];
        }

    }

    private function addLangCodes($results)
    {
        # Wenn es keine Ergebnisse gibt, brauchen wir uns gar nicht erst zu bemühen
        if (sizeof($results) === 0) {
            return $results;
        }

        # Bei der Spracheinstellung "all" wird nicht gefiltert
        if ($this->getLang() === "all") {
            return $results;
        } else {
            # Ansonsten müssen wir jedem Result einen Sprachcode hinzufügen
            $id = 0;
            $langStrings = [];
            foreach ($results as $result) {
                # Wir geben jedem Ergebnis eine ID um später die Sprachcodes zuordnen zu können
                $result->id = $id;

                $langStrings["result_" . $id] = utf8_encode($result->getLangString());

                $id++;
            }
            # Wir schreiben die Strings in eine temporäre JSON-Datei,
            # Da das Array unter umständen zu groß ist für eine direkte Übergabe an das Skript
            $filename = "/tmp/" . getmypid();
            file_put_contents($filename, json_encode($langStrings));
            $langDetectorPath = app_path() . "/Models/lang.pl";
            $lang = exec("echo '$filename' | $langDetectorPath");
            $lang = json_decode($lang, true);

            # Wir haben nun die Sprachcodes der einzelnen Ergebnisse.
            # Diese müssen wir nur noch korrekt zuordnen, dann sind wir fertig.
            foreach ($lang as $key => $langCode) {
                # Prefix vom Key entfernen:
                $id = intval(str_replace("result_", "", $key));
                foreach ($this->results as $result) {
                    if ($result->id === $id) {
                        $result->langCode = $langCode;
                        break;
                    }
                }
            }
            return $results;
        }
    }

    public function combineResults($engines)
    {
        foreach ($engines as $engine) {
            if (isset($engine->next)) {
                $this->next[] = $engine->next;
            }
            if (isset($engine->last)) {
                $this->last[] = $engine->last;
            }
            foreach ($engine->results as $result) {
                if ($result->valid) {
                    $this->results[] = $result;
                }
            }
            foreach ($engine->ads as $ad) {
                $this->ads[] = $ad;
            }
        }
    }

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

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

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

            # Nun müssen wir nur noch die Links für die Advertiser ändern:
            foreach ($answer as $el) {
                $hoster = $el[0];
                $hash = $el[1];

                foreach ($results as $result) {
                    if ($hoster === $result->tld && !$result->partnershop) {
                        # Hier ist ein Advertiser:
                        # Das Logo hinzufügen:
                        if ($result->image !== "") {
                            $result->logo = "https://img.smartredirect.de/logos_v2/60x30/" . $hash . ".gif";
                        } else {
                            $result->image = "https://img.smartredirect.de/logos_v2/120x60/" . $hash . ".gif";
                        }

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

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

        return $results;
    }

    public function humanVerification($results){
        # Let's check if we need to implement a redirect for human verification
        if($this->verificationCount > 10){
            foreach($results as $result){
                $link = $result->link;
                $day = Carbon::now()->day;
                $pw = md5($this->verificationId . $day . $link . env("PROXY_PASSWORD"));
                $url = route('humanverification', ['mm' => $this->verificationId, 'pw' => $pw, "url" => urlencode(str_replace("/", "<<SLASH>>", base64_encode($link)))]);
                $proxyPw = md5($this->verificationId . $day . $result->proxyLink . env("PROXY_PASSWORD"));
                $proxyUrl = route('humanverification', ['mm' => $this->verificationId, 'pw' => $proxyPw, "url" => urlencode(str_replace("/", "<<SLASH>>", base64_encode($result->proxyLink)))]);
                $result->link = $url;
                $result->proxyLink = $proxyUrl;
            }
            return $results;
        }else{
            return $results;
        }
    }

    public function authorize($key)
    {
        $postdata = http_build_query(array(
            'dummy' => rand(),
        ));
        $opts = array('http' => array(
            'method' => 'POST',
            'header' => 'Content-type: application/x-www-form-urlencoded',
            'content' => $postdata,
        ),
        );

        $context = stream_context_create($opts);

        try {
            $link = "https://key.metager3.de/" . urlencode($key) . "/request-permission/api-access";
            $result = json_decode(file_get_contents($link, false, $context));
            if ($result->{'api-access'} == true) {
                return true;
            } else {
                return false;
            }

        } catch (\ErrorException $e) {
            return false;
        }
    }

    public function createQuicktips()
    {
        # Die quicktips werden als job erstellt und zur Abarbeitung freigegeben
        $quicktips = new \App\Models\Quicktips\Quicktips($this->q, $this->lang, $this->getTime(), $this->getHashCode());
        return $quicktips;
    }

    /*
     * Die Erstellung der Suchmaschinen bis die Ergebnisse da sind mit Unterfunktionen
     */

    public function createSearchEngines(Request $request)
    {
        # Wenn es kein Suchwort gibt
        if (!$request->filled("eingabe") || $this->q === "") {
            return;
        }

        $xml = simplexml_load_file($this->sumaFile);
        $sumas = $xml->xpath("suma");
        $enabledSearchengines = [];
        $overtureEnabled = false;
        $sumaCount = 0;

        $isCustomSearch = $this->startsWith($this->fokus, 'focus_');

        # Im Falle einer Custom-Suche ohne mindestens einer selektierter Suchmaschine wird eine Web-Suche durchgeführt
        if ($isCustomSearch && !$this->atLeastOneSearchengineSelected($request)) {
            $isCustomSearch = false;
            $this->fokus = 'web';
        }

        /* 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
         */
        foreach ($sumas as $suma) {
            if (($this->sumaIsSelected($suma, $request, $isCustomSearch)
                || (!$this->isBildersuche()
                    && $this->sumaIsAdsuche($suma, $overtureEnabled)))
                && (!$this->sumaIsDisabled($suma))) {
                if ($this->sumaIsOverture($suma)) {
                    $overtureEnabled = true;
                }
                if ($this->sumaIsNotAdsuche($suma)) {
                    $sumaCount += 1;
                }
                $enabledSearchengines[] = $suma;
            }
        }

        # Sonderregelung für alle Suchmaschinen, die zu den Minisuchern gehören. Diese können alle gemeinsam über einen Link abgefragt werden
        $subcollections = [];

        $tmp = [];
        // Es gibt den Schalter "minism=on" Dieser soll bewirken, dass alle Minisucher angeschaltet werden.
        // Wenn also "minism=on" ist, dann durchsuchen wir statt den tatsächlich angeschalteten Suchmaschinen,
        // alle Suchmaschinen nach "minismCollection"
        if ($request->input("minism", "off") === "on") {
            // Wir laden alle Minisucher
            foreach ($sumas as $engine) {
                if (isset($engine["minismCollection"])) {
                    $subcollections[] = $engine["minismCollection"]->__toString();
                }
            }
            # Nur noch alle eventuell angeschalteten Minisucher deaktivieren
            foreach ($enabledSearchengines as $index => $engine) {
                if (!isset($engine["minismCollection"])) {
                    $tmp[] = $engine;
                }
            }
        } else {
            // Wir schalten eine Teilmenge, oder aber gar keine an
            foreach ($enabledSearchengines as $engine) {
                if (isset($engine['minismCollection'])) {
                    $subcollections[] = $engine['minismCollection']->__toString();
                } else {
                    $tmp[] = $engine;
                }
            }
        }
        $enabledSearchengines = $tmp;
        if (sizeof($subcollections) > 0) {
            $enabledSearchengines[] = $this->loadMiniSucher($xml, $subcollections);
        }
        if ($sumaCount <= 0) {
            $this->errors[] = trans('metaGer.settings.noneSelected');
        }
        $engines = [];
        # Wenn eine Sitesearch durchgeführt werden soll, überprüfen wir ob überhaupt eine der Suchmaschinen eine Sitesearch unterstützt
        $siteSearchFailed = $this->checkCanNotSitesearch($enabledSearchengines);

        $typeslist = [];
        $counter = 0;

        if ($this->requestIsCached($request)) {
            $engines = $this->getCachedEngines($request);
            # We need to edit some Options of the Cached Search Engines
            foreach ($engines as $engine) {
                $engine->setResultHash($this->getHashCode());
            }
        } else {
            $engines = $this->actuallyCreateSearchEngines($enabledSearchengines, $siteSearchFailed);
        }

        # Wir starten alle Suchen
        foreach ($engines as $engine) {
            $engine->startSearch($this);
        }

        /* Wir warten auf die Antwort der Suchmaschinen
         * Die Verbindung steht zu diesem Zeitpunkt und auch unsere Requests wurden schon gesendet.
         * Wir zählen die Suchmaschinen, die durch den Cache beantwortet wurden:
         * $enginesToLoad zählt einerseits die Suchmaschinen auf die wir warten und andererseits
         * welche Suchmaschinen nicht rechtzeitig geantwortet haben.
         */

        $enginesToLoad = [];
        $canBreak = false;
        foreach ($engines as $engine) {
            if ($engine->cached) {
                if ($overtureEnabled && ($engine->name === "overture" || $engine->name === "overtureAds")) {
                    $canBreak = true;
                }
            } else {
                $enginesToLoad[$engine->name] = false;
            }
        }

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

        $this->retrieveResults($engines);
    }

    # Spezielle Suchen und Sumas

    public function sumaIsSelected($suma, $request, $custom)
    {
        if ($custom) {
            if ($request->filled("engine_" . $suma["name"])) {
                return true;
            }
        } else {
            $types = explode(",", $suma["type"]);
            if (in_array($this->fokus, $types)) {
                return true;
            }
        }
        return false;
    }

    public function actuallyCreateSearchEngines($enabledSearchengines, $siteSearchFailed)
    {
        $engines = [];
        foreach ($enabledSearchengines as $engine) {

            # Wenn diese Suchmaschine gar nicht eingeschaltet sein soll
            if (!$siteSearchFailed
                && strlen($this->site) > 0
                && (!isset($engine['hasSiteSearch'])
                    || $engine['hasSiteSearch']->__toString() === "0")) {
                continue;
            }

            if (!isset($engine["package"])) {
                die(var_dump($engine));
            }
            # Setze Pfad zu Parser
            $path = "App\Models\parserSkripte\\" . ucfirst($engine["package"]->__toString());

            # Prüfe ob Parser vorhanden
            if (!file_exists(app_path() . "/Models/parserSkripte/" . ucfirst($engine["package"]->__toString()) . ".php")) {
                Log::error("Konnte " . $engine["name"] . " nicht abfragen, da kein Parser existiert");
                $this->errors[] = trans('metaGer.engines.noParser', ['engine' => $engine["name"]]);
                continue;
            }

            # Es wird versucht die Suchengine zu erstellen
            $time = microtime();
            try {
                $tmp = new $path($engine, $this);
            } catch (\ErrorException $e) {
                Log::error("Konnte " . $engine["name"] . " nicht abfragen. " . var_dump($e));
                continue;
            }

            # Ausgabe bei Debug-Modus
            if ($tmp->enabled && isset($this->debug)) {
                $this->warnings[] = $tmp->service . "   Connection_Time: " . $tmp->connection_time . "    Write_Time: " . $tmp->write_time . " Insgesamt:" . ((microtime() - $time) / 1000);
            }

            # Wenn die neu erstellte Engine eingeschaltet ist, wird sie der Liste hinzugefügt
            if ($tmp->isEnabled()) {
                $engines[] = $tmp;
            }
        }
        return $engines;
    }

    public function isBildersuche()
    {
        return $this->fokus === "bilder";
    }

    public function sumaIsAdsuche($suma, $overtureEnabled)
    {
        $sumaName = $suma["name"]->__toString();
        return
            $sumaName === "qualigo"
            || $sumaName === "similar_product_ads"
            || (!$overtureEnabled && $sumaName === "overtureAds");
    }

    public function sumaIsDisabled($suma)
    {
        return
        isset($suma['disabled'])
        && $suma['disabled']->__toString() === "1";
    }

    public function sumaIsOverture($suma)
    {
        return
        $suma["name"]->__toString() === "overture"
        || $suma["name"]->__toString() === "overtureAds";
    }

    public function sumaIsNotAdsuche($suma)
    {
        return
        $suma["name"]->__toString() !== "qualigo"
        && $suma["name"]->__toString() !== "similar_product_ads"
        && $suma["name"]->__toString() !== "overtureAds";
    }

    public function requestIsCached($request)
    {
        return
        $request->filled('next')
        && Cache::has($request->input('next'))
        && unserialize(Cache::get($request->input('next')))['page'] > 1;
    }

    public function getCachedEngines($request)
    {
        $next = unserialize(Cache::get($request->input('next')));
        $this->page = $next['page'];
        $engines = $next['engines'];
        if (isset($next['startForwards'])) {
            $this->startForwards = $next['startForwards'];
        }
        if (isset($next['startBackwards'])) {
            $this->startBackwards = $next['startBackwards'];
        }
        return $engines;
    }

    public function loadMiniSucher($xml, $subcollections)
    {
        $minisucherEngine = $xml->xpath('suma[@name="minism"]')[0];
        $minisucherEngine["subcollections"] = implode(", ", $subcollections);
        $subcollectionsString = urlencode("(" . implode(" OR ", $subcollections) . ")");
        $minisucherEngine["formData"] = str_replace("<<SUBCOLLECTIONS>>", $subcollectionsString, $minisucherEngine["formData"]);
        $minisucherEngine["formData"] = str_replace("<<COUNT>>", sizeof($subcollections) * 10, $minisucherEngine["formData"]);
        return $minisucherEngine;
    }

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

        # Findet die Namen der aktuell eingeschalteten Sumas
        $realEngNames = [];
        foreach ($enabledSearchengines as $realEng) {
            $nam = $realEng["name"]->__toString();
            if ($nam !== "qualigo" && $nam !== "overtureAds") {
                $realEngNames[] = $nam;
            }
        }

        # 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.
        foreach ($foki as $fok => $engines) {
            $isFokus = true;
            $fokiEngNames = [];
            foreach ($engines as $eng) {
                $fokiEngNames[] = $eng;
            }
            # Jede eingeschaltete Engine ist für diesen Fokus geeignet
            foreach ($fokiEngNames as $fen) {
                # Bei Bildersuchen ist uns egal, ob alle Suchmaschinen aus dem Suchfokus eingeschaltet sind, da wir sie eh als Bildersuche anzeigen müssen
                if (!in_array($fen, $realEngNames) && $fok !== "bilder") {
                    $isFokus = false;
                }
            }
            # Jede im Fokus erwartete Engine ist auch eingeschaltet
            foreach ($realEngNames as $ren) {
                if (!in_array($ren, $fokiEngNames)) {
                    $isFokus = false;
                }
            }
            # Wenn die Listen identisch sind, setze den Fokus um
            if ($isFokus) {
                $this->fokus = $fok;
            }
        }
    }

    public function checkCanNotSitesearch($enabledSearchengines)
    {
        if (strlen($this->site) > 0) {
            $enginesWithSite = 0;
            foreach ($enabledSearchengines as $engine) {
                if (isset($engine['hasSiteSearch']) && $engine['hasSiteSearch']->__toString() === "1") {
                    $enginesWithSite++;
                }
            }
            if ($enginesWithSite === 0) {
                $this->errors[] = trans('metaGer.sitesearch.failed', ['site' => $this->site, 'searchLink' => $this->generateSearchLink("web", false)]);
                return true;
            } else {
                $this->warnings[] = trans('metaGer.sitesearch.success', ['site' => $this->site]);
                return false;
            }
        }
        return false;
    }

    public function waitForResults($enginesToLoad, $overtureEnabled, $canBreak)
    {

        $timeStart = microtime(true);
        $results = null;
        while (true) {
            $results = Redis::hgetall('search.' . $this->getHashCode());

            $ready = true;
            // When every
            $connected = true;
            foreach ($results as $key => $value) {
                if ($value === "waiting" || $value === "connected") {
                    $ready = false;
                }
                if ($value === "waiting") {
                    $connected = false;
                }
            }

            // If $ready is false at this point, we're waiting for more searchengines
            // But we have to check for the timeout, too
            if (!$connected) {
                $timeStart = microtime(true);
            }

            $time = (microtime(true) - $timeStart) * 1000;
            // We will apply the timeout only if it's not Yahoo we're waiting for since they are one the most
            // important search engines.
            $canTimeout = !((isset($results["overture"]) && $results["overture"] === "waiting") || (isset($results["overtureAds"]) && $results["overtureAds"] === "waiting"));
            if ($time > $this->time && $canTimeout) {
                $ready = true;
            }

            if ($ready) {
                break;
            }
            usleep(50000);
        }

        # Wir haben nun so lange wie möglich gewartet. Wir registrieren nun noch die Suchmaschinen, die geanwortet haben.
        foreach ($results as $key => $value) {
            $enginesToLoad[$key] = true;
        }
        $this->enginesToLoad = $enginesToLoad;
    }

    public function retrieveResults($engines)
    {
        # Von geladenen Engines die Ergebnisse holen
        foreach ($engines as $engine) {
            if (!$engine->loaded) {
                try {