class.ilMimeMail.php

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<?php
/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */
 
class ilMimeMail
{
    public const MAIL_SUBJECT_PREFIX = '[ILIAS]';
 
    protected static $defaultTransport = null;
 
    protected $subject = '';
 
    protected $body = '';
 
    protected $finalBody = '';
 
    protected $finalBodyAlt = '';
 
    protected $sendto = [];
 
    protected $acc = [];
 
    protected $abcc = [];
 
    protected $images = [];
 
    protected $aattach = [];
 
    protected $actype = [];
 
    protected $adispo = [];
 
    protected $adisplay = [];
 
    protected $sender;
 
    protected $settings;
 
    public function __construct()
    {
        global $DIC;
 
        $this->settings = $DIC->settings();
 
        if (!(self::getDefaultTransport() instanceof ilMailMimeTransport)) {
            $factory = $DIC["mail.mime.transport.factory"];
            self::setDefaultTransport($factory->getTransport());
        }
    }
 
    public static function setDefaultTransport(?ilMailMimeTransport $transport) : void
    {
        if ($transport !== null && !($transport instanceof ilMailMimeTransport)) {
            throw new InvalidArgumentException(sprintf(
                "The passed argument must be null or of type 'ilMailMimeTransport', %s given!",
                gettype($transport)
            ));
        }
 
        self::$defaultTransport = $transport;
    }
 
    public static function getDefaultTransport() : ?ilMailMimeTransport
    {
        return self::$defaultTransport;
    }
 
    public function Subject(string $subject, bool $a_add_prefix = false) : void
    {
        if ($a_add_prefix) {
            // #9096
            $subjectPrefix = $this->settings->get('mail_subject_prefix');
            if (false === $subjectPrefix) {
                $subjectPrefix = self::MAIL_SUBJECT_PREFIX;
            }
            if ($subjectPrefix !== '') {
                $subject = $subjectPrefix . ' ' . $subject;
            }
        }
 
        $this->subject = $subject;
    }
 
    public function getSubject() : string
    {
        return $this->subject;
    }
 
    public function From(ilMailMimeSender $sender) : void
    {
        $this->sender = $sender;
    }
 
    public function To($to) : void
    {
        if (is_array($to)) {
            $this->sendto = $to;
        } else {
            $this->sendto[] = $to;
        }
    }
 
    public function Cc($cc) : void
    {
        if (is_array($cc)) {
            $this->acc = $cc;
        } else {
            $this->acc[] = $cc;
        }
    }
 
    public function Bcc($bcc) : void
    {
        if (is_array($bcc)) {
            $this->abcc = $bcc;
        } else {
            $this->abcc[] = $bcc;
        }
    }
 
    public function getTo() : array
    {
        return $this->sendto;
    }
 
    public function getCc() : array
    {
        return $this->acc;
    }
 
    public function getBcc() : array
    {
        return $this->abcc;
    }
 
    public function Body(string $body) : void
    {
        $this->body = $body;
    }
 
    public function getFinalBody() : string
    {
        return $this->finalBody;
    }
 
    public function getFinalBodyAlt() : string
    {
        return $this->finalBodyAlt;
    }
 
    public function getFrom() : ilMailMimeSender
    {
        return $this->sender;
    }
 
    public function Attach(
        string $filename,
        string $file_type = '',
        string $disposition = 'inline',
        ?string $display_name = null
    ) : void {
        if ($file_type === '') {
            $file_type = 'application/octet-stream';
        }
 
        $this->aattach[] = $filename;
        $this->actype[] = $file_type;
        $this->adispo[] = $disposition;
        $this->adisplay[] = $display_name;
    }
 
    public function getAttachments() : array
    {
        $attachments = [];
 
        $i = 0;
        foreach ($this->aattach as $attachment) {
            $name = '';
            if (isset($this->adisplay[$i]) && is_string($this->adisplay[$i]) && $this->adisplay[$i] !== '') {
                $name = $this->adisplay[$i];
            }
 
            $attachments[] = [
                'path' => $attachment,
                'name' => $name
            ];
            ++$i;
        }
 
        return $attachments;
    }
 
    public function getImages() : array
    {
        return array_values($this->images);
    }
 
    protected function build() : void
    {
        global $DIC;
 
        $this->finalBodyAlt = '';
        $this->finalBody = '';
        $this->images = [];
 
        if ($DIC->settings()->get('mail_send_html', 0)) {
            $skin = $DIC['ilClientIniFile']->readVariable('layout', 'skin');
 
            $this->buildBodyMultiParts($skin);
            $this->buildHtmlInlineImages($skin);
        } else {
            $this->finalBody = str_ireplace(["<br />", "<br>", "<br/>"], "\n", $this->body);
        }
    }
 
    protected function buildBodyMultiParts(string $skin) : void
    {
        if ($this->body === '') {
            $this->body = ' ';
        }
 
        if (strip_tags($this->body, '<b><u><i><a>') === $this->body) {
            // Let's assume(!) that there is no HTML (except certain tags, e.g. used for object title formatting, where the consumer is not aware of this), so convert "\n" to "<br>"
            $this->finalBodyAlt = $this->body;
            $this->body = ilUtil::makeClickable(nl2br($this->body));
        } else {
            // if there is HTML, convert "<br>" to "\n" and strip tags for plain text alternative
            $this->finalBodyAlt = strip_tags(str_ireplace(["<br />", "<br>", "<br/>"], "\n", $this->body));
        }
 
        $this->finalBody = str_replace('{PLACEHOLDER}', $this->body, $this->getHtmlEnvelope($skin));
    }
 
    protected function getHtmlEnvelope(string $skin) : string
    {
        $bracket_path = './Services/Mail/templates/default/tpl.html_mail_template.html';
 
        if ($skin !== 'default') {
            $tplpath = './Customizing/global/skin/' . $skin . '/Services/Mail/tpl.html_mail_template.html';
 
            if (file_exists($tplpath)) {
                $bracket_path = './Customizing/global/skin/' . $skin . '/Services/Mail/tpl.html_mail_template.html';
            }
        }
 
        return file_get_contents($bracket_path);
    }
 
    protected function buildHtmlInlineImages(string $skin) : void
    {
        $this->gatherImagesFromDirectory('./Services/Mail/templates/default/img');
 
        if ($skin !== 'default') {
            $skinDirectory = './Customizing/global/skin/' . $skin . '/Services/Mail/img';
            if (is_dir($skinDirectory) && is_readable($skinDirectory)) {
                $this->gatherImagesFromDirectory($skinDirectory, true);
            }
        }
    }
 
    protected function gatherImagesFromDirectory(string $directory, bool $clearPrevious = false) : void
    {
        if ($clearPrevious) {
            $this->images = [];
        }
 
        foreach (new RegexIterator(new DirectoryIterator($directory), '/\.(jpg|svg|png)$/i') as $file) {
            $cid = 'img/' . $file->getFilename();
 
            $this->images[$cid] = [
                'path' => $file->getPathname(),
                'cid' => $cid,
                'name' => $file->getFilename()
            ];
        }
    }
 
    public function Send(ilMailMimeTransport $transport = null) : bool
    {
        if (!($transport instanceof ilMailMimeTransport)) {
            $transport = self::getDefaultTransport();
        }
 
        $this->build();
 
        return $transport->send($this);
    }
}