- Refactoring of the mail sending part. Mail queue (table 'queued') is now used also for all test emails.

- More options how to send test emails.
- Fixed problems with pausing a campaign (#593)
- Started rework of transactional sender of templates (#606), however this contains functionality regression at the moment because it does not interpret templates as HBS. It needs HBS option for templates as described in https://github.com/Mailtrain-org/mailtrain/issues/611#issuecomment-502345227

TODO:
- detect sending errors connected to not able to contact the mailer and pause/retry campaing and queued sending - don't mark the recipients as BOUNCED
- add FAILED campaign state and fall into it if sending to campaign consistently fails (i.e. the error with sending is not temporary)
- if the same happends for queued email, delete the message

server/services/triggers.js

@@ -10,6 +10,7 @@ const { Entity, Event } = require('../../shared/triggers');
 const { SubscriptionStatus } = require('../../shared/lists');
 const links = require('../models/links');
 const contextHelpers = require('../lib/context-helpers');
+const {MessageType, CampaignSender} = require('../lib/campaign-sender');
 
 const triggerCheckPeriod = 30 * 1000;
 const triggerFirePeriod = 120 * 1000;
@@ -151,12 +152,13 @@ async function run() {
                         subscription: subscriber.id
                     });
 
-                    await tx('queued').insert({
-                        campaign: campaign.id,
-                        list: cpgList.list,
-                        subscription: subscriber.id,
-                        trigger: trigger.id
-                    });
+                    await CampaignSender.queueMessageTx(tx,
+                        campaign.send_configuration, cpgList.list, subscriber.id, MessageType.TRIGGERED,
+                        {
+                            campaignId: campaign.id,
+                            triggerId: trigger.id
+                        }
+                    );
 
                     await tx('triggers').increment('count').where('id', trigger.id);