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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Calendar\Application\Service; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use PDO; |
| 12 | use Sabre\VObject\Component\VCalendar; |
| 13 | use Sabre\VObject\Component\VEvent; |
| 14 | use Sabre\VObject\Reader; |
| 15 | use Throwable; |
| 16 | |
| 17 | /** |
| 18 | * Inbound Email Processor for standard RFC 6047 iTIP METHOD:REPLY calendar responses. |
| 19 | * |
| 20 | * Automatically parses incoming iCalendar replies sent by email servers (Gmail, Outlook, Apple Mail) |
| 21 | * and updates attendee RSVP status in the CRM calendar database. |
| 22 | * |
| 23 | * @package App\Modules\Calendar\Application\Service |
| 24 | */ |
| 25 | final readonly class InboundCalendarReplyProcessor |
| 26 | { |
| 27 | private const string PARTSTAT_ACCEPTED = 'accepted'; |
| 28 | private const string PARTSTAT_DECLINED = 'declined'; |
| 29 | private const string PARTSTAT_TENTATIVE = 'tentative'; |
| 30 | |
| 31 | public function __construct( |
| 32 | private CalendarInvitationServiceInterface $invitationService, |
| 33 | private PDO $pdo, |
| 34 | private string $tablePrefix = 'c_' |
| 35 | ) { |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Inspects and processes incoming email raw payload or attachments for iTIP replies. |
| 40 | * |
| 41 | * @param string $fromEmail Responding sender email. |
| 42 | * @param string $subject Email subject. |
| 43 | * @param list<string> $icsContents List of raw iCalendar strings found in email parts or attachments. |
| 44 | * @return array{handled: bool, calendar_id?: int, status?: string, uid?: string} |
| 45 | */ |
| 46 | public function processInboundReply(string $fromEmail, string $subject, array $icsContents): array |
| 47 | { |
| 48 | foreach ($icsContents as $ics) { |
| 49 | $parsed = $this->parseIcsReply($ics, $fromEmail); |
| 50 | if ($parsed !== null) { |
| 51 | $updated = $this->applyReplyUpdate($parsed['uid'], $parsed['email'], $parsed['status']); |
| 52 | if ($updated['success']) { |
| 53 | return [ |
| 54 | 'handled' => true, |
| 55 | 'calendar_id' => $updated['calendar_id'], |
| 56 | 'status' => $parsed['status'], |
| 57 | 'uid' => $parsed['uid'], |
| 58 | ]; |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | // Fallback to subject-based RSVP recognition if no valid iCalendar attachment is present |
| 64 | $subjectParsed = $this->parseSubjectReply($subject); |
| 65 | if ($subjectParsed !== null) { |
| 66 | $matchedEvent = $this->findEventBySubjectAndAttendee($subjectParsed['subject'], $fromEmail); |
| 67 | if ($matchedEvent !== null) { |
| 68 | $calendarId = (int) $matchedEvent['id']; |
| 69 | $this->invitationService->updateAttendeeStatus($calendarId, $fromEmail, $subjectParsed['status']); |
| 70 | return [ |
| 71 | 'handled' => true, |
| 72 | 'calendar_id' => $calendarId, |
| 73 | 'status' => $subjectParsed['status'], |
| 74 | 'uid' => (string) ($matchedEvent['c_uid'] ?? ''), |
| 75 | ]; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return ['handled' => false]; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Parses raw iCalendar string looking for METHOD:REPLY and attendee decision. |
| 84 | * |
| 85 | * @return array{uid: string, email: string, status: string}|null |
| 86 | */ |
| 87 | public function parseIcsReply(string $icsContent, string $fallbackEmail): ?array |
| 88 | { |
| 89 | if (!str_contains($icsContent, 'METHOD:REPLY') && !str_contains($icsContent, 'method=REPLY')) { |
| 90 | return null; |
| 91 | } |
| 92 | |
| 93 | try { |
| 94 | $vcal = Reader::read($icsContent); |
| 95 | return $vcal instanceof VCalendar ? $this->extractReplyFromVCalendar($vcal, $fallbackEmail) : null; |
| 96 | } catch (Throwable) { |
| 97 | return null; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @return array{uid: string, email: string, status: string}|null |
| 103 | */ |
| 104 | private function extractReplyFromVCalendar(VCalendar $vcal, string $fallbackEmail): ?array |
| 105 | { |
| 106 | /** @var VEvent|null $event */ |
| 107 | $event = $vcal->VEVENT ?? null; |
| 108 | if (!($event instanceof VEvent)) { |
| 109 | return null; |
| 110 | } |
| 111 | |
| 112 | $uid = trim((string) ($event->UID ?? '')); |
| 113 | if ($uid === '') { |
| 114 | return null; |
| 115 | } |
| 116 | |
| 117 | $partStat = 'ACCEPTED'; |
| 118 | $attendeeEmail = strtolower(trim($fallbackEmail)); |
| 119 | |
| 120 | if (isset($event->ATTENDEE)) { |
| 121 | foreach ($event->ATTENDEE as $att) { |
| 122 | $attEmail = strtolower(str_ireplace('mailto:', '', (string) $att)); |
| 123 | if ($attEmail !== '') { |
| 124 | $attendeeEmail = $attEmail; |
| 125 | } |
| 126 | if (isset($att['PARTSTAT'])) { |
| 127 | $partStat = strtoupper((string) $att['PARTSTAT']); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | $status = match ($partStat) { |
| 133 | 'DECLINED' => self::PARTSTAT_DECLINED, |
| 134 | 'TENTATIVE' => self::PARTSTAT_TENTATIVE, |
| 135 | default => self::PARTSTAT_ACCEPTED, |
| 136 | }; |
| 137 | |
| 138 | return [ |
| 139 | 'uid' => $uid, |
| 140 | 'email' => $attendeeEmail, |
| 141 | 'status' => $status, |
| 142 | ]; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Applies parsed iTIP reply status to the corresponding calendar record. |
| 147 | * |
| 148 | * @return array{success: bool, calendar_id?: int} |
| 149 | */ |
| 150 | private function applyReplyUpdate(string $uid, string $attendeeEmail, string $status): array |
| 151 | { |
| 152 | $table = $this->tablePrefix . 'mod_calendar_records'; |
| 153 | $sql = "SELECT `id` FROM `{$table}` WHERE `c_uid` = :uid LIMIT 1"; |
| 154 | |
| 155 | $stmt = $this->pdo->prepare($sql); |
| 156 | $stmt->execute([':uid' => $uid]); |
| 157 | $row = $stmt->fetch(PDO::FETCH_ASSOC); |
| 158 | |
| 159 | if ($row === false) { |
| 160 | return ['success' => false]; |
| 161 | } |
| 162 | |
| 163 | $calendarId = (int) $row['id']; |
| 164 | $ok = $this->invitationService->updateAttendeeStatus($calendarId, $attendeeEmail, $status); |
| 165 | |
| 166 | return ['success' => $ok, 'calendar_id' => $calendarId]; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Parses standard subject line prefixes (Accepted / Declined / Tentative / Zaakceptowano / Odrzucono). |
| 171 | * |
| 172 | * @return array{status: string, subject: string}|null |
| 173 | */ |
| 174 | private function parseSubjectReply(string $subject): ?array |
| 175 | { |
| 176 | $clean = trim($subject); |
| 177 | $patterns = [ |
| 178 | '/^(?:accepted|zaakceptowano|przyjęto):\s*(.+)$/i' => self::PARTSTAT_ACCEPTED, |
| 179 | '/^(?:declined|odrzucono|odrzucone):\s*(.+)$/i' => self::PARTSTAT_DECLINED, |
| 180 | '/^(?:tentative|niepewne|być może):\s*(.+)$/i' => self::PARTSTAT_TENTATIVE, |
| 181 | ]; |
| 182 | |
| 183 | foreach ($patterns as $pattern => $status) { |
| 184 | if (preg_match($pattern, $clean, $matches)) { |
| 185 | return [ |
| 186 | 'status' => $status, |
| 187 | 'subject' => trim($matches[1]), |
| 188 | ]; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | return null; |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Searches for calendar event by matching subject and attendee email. |
| 197 | * |
| 198 | * @return array<string, mixed>|null |
| 199 | */ |
| 200 | private function findEventBySubjectAndAttendee(string $subject, string $attendeeEmail): ?array |
| 201 | { |
| 202 | $table = $this->tablePrefix . 'mod_calendar_records'; |
| 203 | $sql = "SELECT `id`, `c_uid`, `subject` FROM `{$table}` " |
| 204 | . "WHERE `subject` = :subj AND `attendees` LIKE :email " |
| 205 | . "ORDER BY `id` DESC LIMIT 1"; |
| 206 | |
| 207 | $stmt = $this->pdo->prepare($sql); |
| 208 | $stmt->execute([ |
| 209 | ':subj' => $subject, |
| 210 | ':email' => '%' . $attendeeEmail . '%', |
| 211 | ]); |
| 212 | $row = $stmt->fetch(PDO::FETCH_ASSOC); |
| 213 | |
| 214 | return $row !== false ? $row : null; |
| 215 | } |
| 216 | } |