Performance/inbox paging (#11258)

* merge all changes to one commit of PR #11157 / #11226

* rename the new paged messages route

* rename event, move map-method to the Inbox schema, fix lint

* move `mapMessage`-call to `getUserInbox`

* revert schema.method back to a normal one

website/server/controllers/api-v3/members.js

@@ -20,6 +20,7 @@ import {
 } from '../../libs/email';
 import { sendNotification as sendPushNotification } from '../../libs/pushNotifications';
 import { achievements } from '../../../../website/common/';
+import {sentMessage} from '../../libs/inbox';
 
 let api = {};
 
@@ -633,6 +634,7 @@ api.sendPrivateMessage = {
 
     const sender = res.locals.user;
     const message = req.body.message;
+
     const receiver = await User.findById(req.body.toUserId).exec();
     if (!receiver) throw new NotFound(res.t('userNotFound'));
     if (!receiver.flags.verifiedUsername) delete receiver.auth.local.username;
@@ -640,26 +642,7 @@ api.sendPrivateMessage = {
     const objections = sender.getObjectionsToInteraction('send-private-message', receiver);
     if (objections.length > 0 && !sender.isAdmin()) throw new NotAuthorized(res.t(objections[0]));
 
-    const messageSent = await sender.sendMessage(receiver, { receiverMsg: message });
-
-    if (receiver.preferences.emailNotifications.newPM !== false) {
-      sendTxnEmail(receiver, 'new-pm', [
-        {name: 'SENDER', content: getUserInfo(sender, ['name']).name},
-      ]);
-    }
-
-    if (receiver.preferences.pushNotifications.newPM !== false) {
-      sendPushNotification(
-        receiver,
-        {
-          title: res.t('newPM'),
-          message: res.t('newPMInfo', {name: getUserInfo(sender, ['name']).name, message}),
-          identifier: 'newPM',
-          category: 'newPM',
-          payload: {replyTo: sender._id},
-        }
-      );
-    }
+    const messageSent = await sentMessage(sender, receiver, message, res.t);
 
     res.respond(200, {message: messageSent});
   },