v0.9.2: Allow handling of study-reminder emails

Added

• Email templates can use the language attribute that would contain the preferred language from the user model. Example usage added to the docs.

Changed

• "Auto email" definitions can contain a label, so that admins can describe the intent for the specific config.
• Updated dependencies (reflected in go.mod).
• Email-templates documentation includes new possibilities related to the above changes of this release.

v0.9.1

• Log error during email template resolving
• Print only host name when reconnecting

Auto-Message Flow update

Change flow of auto message sending:

• Step 1: generate message and save to outgoing

• Step 2: handle outgoing messages

• auto messages are written to the outgoing by default and not send to the email client directly

• rename bulk messaging methods (remove async)

• improve logging and counter logic

• add method to prepare stream of users for both send methods in bulk messaging

Use filter when asking for user stream

• bulk message sending is using a filter to only retrieve users for current weekday when trying to send weekly and newsletter types

• updated dependencies and go.mod to go 1.15

Bulk message sending - synchronously

• use synchronous message sending for bulk messages
• print how many emails were processed and duration

v0.8.3: pool close seemed to cause issues - remove for now

• Improve Outgoing email flow in Message scheduler (delete only if success from email-client and saved to sent emails)
• remove Closing of pool, since it seems to cause some issues - warning: this may result in increasing memory usage for now

v0.8.2

This release attempts to fix issue when email-sending is not recovering by deleting connection and starting them again.

Configurable Timeout

Both for high prio and low prio server config, need to define a timeout for email sending.

...
- host: test2.example.com
  port: 235
  connections: 2
  sendTimeout: 5
  auth:
    user: testuser2
    password: testpassword2
...

sendTimeout will be interpreted as seconds

Improved handling of outgoing mails and added logging

Breaking change

These new environment variables replace MESSAGE_SCHEDULER_SLEEP_INTERVAL:

MESSAGE_SCHEDULER_INTERVAL_HIGH_PRIO=45 
MESSAGE_SCHEDULER_INTERVAL_LOW_PRIO=1800
MESSAGE_SCHEDULER_INTERVAL_AUTO_MESSAGE=120

The value is interpreted in seconds

Changes

• extend API to be able to send low prio instant emails
• method flag to fetch only high prio emails from DB
• apply retry delay when email sending fails
• add connection to logging service
• log relevant user interactions

v0.7.1

• code optimization -> using global constants instead of hardcoded strings
• functionality remained the same