ZP-1033 Implement send-as in Kopano->SendMail(). KOE and serverside send

as are supported.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/kopano/kopano.php

@@ -444,6 +444,36 @@ class BackendKopano implements IBackend, ISearchProvider {
                                             Utils::PrintAsString((isset($sm->source->folderid) ? $sm->source->folderid : false)),
                                             Utils::PrintAsString(($sm->saveinsent)), Utils::PrintAsString(isset($sm->replacemime)) ));
 
+        // Send-As functionality - https://jira.z-hub.io/browse/ZP-908
+        $sendingAsSomeone = false;
+        if (defined('KOE_CAPABILITY_SENDAS') && KOE_CAPABILITY_SENDAS) {
+            $senderEmail = array();
+            // KOE: grep for the Sender header indicating we should send-as
+            // the 'X-Push-Sender-Name' header is not used
+            if (preg_match("/^X-Push-Sender:\s(.*?)$/im", $sm->mime, $senderEmail)) {
+                $sendAsEmail = trim($senderEmail[1]);
+                ZLog::Write(LOGLEVEL_DEBUG, sprintf("SendMail(): Send-As '%s' requested by KOE", $sendAsEmail));
+                $sm->mime =  preg_replace("/^From: .*?$/im", "From: ". $sendAsEmail, $sm->mime, 1);
+                $sendingAsSomeone = true;
+            }
+            // serverside Send-As - shared folder with DeviceManager::FLD_FLAGS_REPLYASUSER flag
+            elseif (isset($sm->source->folderid)) {
+                // get the owner of this folder - System is not allowed
+                $sharedUser = ZPush::GetAdditionalSyncFolderStore($sm->source->folderid);
+                if ($sharedUser != false && $sharedUser != 'SYSTEM') {
+                    $folders = ZPush::GetAdditionalSyncFolders();
+                    if (isset($folders[$sm->source->folderid]) && ($folders[$sm->source->folderid]->Flags & DeviceManager::FLD_FLAGS_REPLYASUSER)) {
+                        $sendAs = $this->resolveRecipientGAL($sharedUser, 1);
+                        if (isset($sendAs[0])) {
+                            ZLog::Write(LOGLEVEL_DEBUG, sprintf("SendMail(): Server side Send-As activated for shared folder. Sending as '%s'.", $sendAs[0]->emailaddress));
+                            $sm->mime =  preg_replace("/^From: .*?$/im", "From: ". $sendAs[0]->emailaddress, $sm->mime, 1);
+                            $sendingAsSomeone = true;
+                        }
+                    }
+                }
+            }
+        }
+
         // by splitting the message in several lines we can easily grep later
         foreach(preg_split("/((\r)?\n)/", $sm->mime) as $rfc822line)
             ZLog::Write(LOGLEVEL_WBXML, "RFC822: ". $rfc822line);
@@ -507,9 +537,12 @@ class BackendKopano implements IBackend, ISearchProvider {
         // PR_SENT_REPRESENTING_EMAIL_ADDRESS properties and "broken" PR_SENT_REPRESENTING_ENTRYID
         // which results in spooler not being able to send the message.
         // @see http://jira.zarafa.com/browse/ZP-85
+        // If using KOE send-as feature, we keep this properties because they actually are the send-as
+        if (!$sendingAsSomeone) {
             mapi_deleteprops($mapimessage,
                 array(  $sendMailProps["sentrepresentingname"], $sendMailProps["sentrepresentingemail"], $sendMailProps["representingentryid"],
                         $sendMailProps["sentrepresentingaddt"], $sendMailProps["sentrepresentinsrchk"]));
+        }
 
         if(isset($sm->source->itemid) && $sm->source->itemid) {
             // answering an email in a public/shared folder