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Current File : //www/loslex/test/app/Http/Controllers/IcsController.php

<?php

namespace App\Http\Controllers;

use App\Models\Contest;
use App\Models\User;
use Barryvdh\Debugbar\Facades\Debugbar;
use Carbon\CarbonImmutable;
use Carbon\CarbonInterval;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Log;
use Symfony\Component\HttpFoundation\Response;

class IcsController extends Controller
{
    protected $host;

    public function __construct()
    {
        $this->host = request()->getHttpHost();
    }

    // all available contests
    public function contests()
    {
        app('debugbar')->disable();

        // DEBUG Cache::forget('icsContests');
        $feedData = Cache::remember('icsContests', 3600, function () {
            Log::info("Cache MISS", ['key' => 'icsContests']);
            $contestlist = Contest::where('date', '>=', Carbon::today())
                                ->where('published', 1)
                                ->orderBy('date')
                                ->with(['contest_level','contest_category','organizer_group','range'])
                                ->get();

            $feedArray = $this->getIcsHeader();
            foreach ($contestlist as $contest) {
                $feedArray = array_merge($feedArray, $this->getIcsContestData($contest));
            }
            $feedArray = array_merge($feedArray, $this->getIcsFooter());

            return implode("\r\n", $feedArray);
        });

        return response($feedData, Response::HTTP_OK, [
            'Content-type' => 'text/calendar; charset=utf-8',
            'Content-Disposition' => 'attachment; filename=contests.ics'
        ]);
    }

    // contests from specific range
    public function range(Range $range)
    {

    }

    // contests where user is registered
    public function user(string $token)
    {
        $user = User::where('personaltoken', $token)->first();
        if ($user->count() == 0) {
            // return 404?
            return;
        }

        $registrations = Registration::where('user_id', $user->id)->get();
        // TODO tady neco chybi?
    }

    private function getIcsContestData(Contest $contest)
    {
        $description[] = "Druh závodu: " . __('contest.' . $contest->contest_level?->name) . ", " . __('contest.' . $contest->contest_category?->name);
        $description[] = "Pořadatelský tým: {$contest->organizer_group->name}";
        $description[] = "Startovné: LEX: {$contest->feelex} Kč; Ostatní: {$contest->feeothers} Kč";
        $description[] = "Kapacita závodu: {$contest->capacity} střelců";
        $description[] = "Podrobnosti závodu: " . route('contest.show', $contest->id);
        $desctext = implode('\n', $description);

        $data = array();
        $data[] = "BEGIN:VEVENT";
        $data[] = "UID:c{$contest->id}@{$this->host}";
        $data[] = "SEQUENCE:{$contest->version}";
        $data[] = "DTSTAMP:{$contest->date->format("Ymd\\THis")}";

        if ($contest->squadShootStyle == "manual") {
            $start = CarbonInterval::createFromFormat('H:i', min(array_slice($contest->contestStart, 1, $contest->squads)));
            $end = CarbonInterval::createFromFormat('H:i', max(array_slice($contest->contestEnd, 1, $contest->squads)));
        } else {
            $start = CarbonInterval::createFromFormat('H:i', $contest->presentationStart[0]);
            $end = CarbonInterval::createFromFormat('H:i', $contest->contestEnd[0]);
        }
        $ctDate = new CarbonImmutable($contest->date);
        $data[] = "DTSTART;TZID=Europe/Prague:{$ctDate->addMinutes($start->totalMinutes)->format("Ymd\\THis")}";
        $data[] = "DTEND;TZID=Europe/Prague:{$ctDate->addMinutes($end->totalMinutes)->format("Ymd\\THis")}";
        $data[] = "LAST-MODIFIED;TZID=Europe/Prague:{$contest->updated_at->format("Ymd\\THis")}";

        $data[] = "LOCATION:{$contest->range->name}";
        $data[] = "GEO:{$contest->range->coords->latitude};{$contest->range->coords->longitude}";

        $data[] = $this->wrapLine("SUMMARY:LOS: {$contest->contestname}");
        $data[] = $this->wrapLine("DESCRIPTION:{$desctext}");
        $data[] = "URL:" . route('contest.show', $contest->id);
        $data[] = "ORGANIZER;CN={$contest->organizer_group->name}:mailto:{$contest->organizerEmail}";

        $data[] = "CATEGORIES:" . __('contest.' . $contest->contest_level?->name) . "," . __('contest.' . $contest->contest_category?->name);

        $data[] = "END:VEVENT";
        return $data;
    }

    private function getIcsHeader()
    {
        $data = array();
        $data[] = "BEGIN:VCALENDAR";
        $data[] = "VERSION:2.0";
        $data[] = "CALSCALE:GREGORIAN";
        $data[] = "PRODID:-//{$this->host}//NONSGML Contests//cs";
        $data[] = "NAME:LOS LEX";
        $data[] = "X-WR-CALNAME:LOS LEX";
        $data[] = "DESCRIPTION;LANGUAGE=cs:Kalendář závodů LOS";
        $data[] = "DESCRIPTION;LANGUAGE=en:LOS Contest calendar";
        $data[] = "SOURCE;VALUE=URI:" . route('ics.contests');
        $data[] = "X-WR-CALDESC:Kalendář závodů LOS";
        $data[] = "REFRESH-INTERVAL;VALUE=DURATION:P3H";
        $date[] = "COLOR:red";

        $data[] = "BEGIN:VTIMEZONE";
        $data[] = "TZID:Europe/Prague";
        $data[] = "BEGIN:DAYLIGHT";
        $data[] = "TZNAME:CEST";
        $data[] = "TZOFFSETFROM:+0100";
        $data[] = "TZOFFSETTO:+0200";
        $data[] = "DTSTART:19700329T020000";
        $data[] = "RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU";
        $data[] = "END:DAYLIGHT";
        $data[] = "BEGIN:STANDARD";
        $data[] = "TZOFFSETFROM:+0200";
        $data[] = "TZOFFSETTO:+0100";
        $data[] = "TZNAME:CET";
        $data[] = "DTSTART:19701025T030000";
        $data[] = "RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU";
        $data[] = "END:STANDARD";
        $data[] = "END:VTIMEZONE";

        return $data;
    }

    private function getIcsFooter()
    {
        $data = array();
        $data[] = "END:VCALENDAR";

        return $data;
    }

    private function wrapLine(string $text)
    {
        /* Lines of text SHOULD NOT be longer than 75 octets, excluding the line break. Long content lines SHOULD be split
         * into a multiple line representations using a line "folding" technique. That is, a long line can be split between
         * any two characters by inserting a CRLF immediately followed by a single linear white-space character (i.e., SPACE or HTAB).
         */

         $segments = mb_str_split($text, 70, 'UTF-8');
         $result = array_shift($segments);

         foreach ($segments as $segment) {
            $result .= "\r\n " . $segment;
         }

         return $result;
    }

    private function replaceNewlines(string $text)
    {
        $text = preg_replace("/\n+/", "\\n", $text);
        return $text;
    }
}

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