Changes at "Notifications digest"

Ref. PWA12

NOTE: this feature is from a big development. See PWA discussion at GitHub.

Is your feature request related to a problem? Please describe.

As a registered participant that’s following a participatory process, I receive lots of notifications by email. That overwhelms me, makes filters for these kinds of messages, and defeats the purpose of receiving these kinds of notifications.

Describe the solution you’d like

I want to have a notifications digest. We can start with a summary of notifications in the last 24 hours (daily), but in the future, this could also support other kinds of timeframes (like weekly, notifications of the last 7 days)

There are a couple of things to take into account:

• This should be a setting enabled by default. A participant can change it and go back to the old behavior if she wants to. This setting will be called “I want to receive a digest email every day with notifications.” and will be available in “My account” -> “Notifications settings”. It’ll be incompatible with “I want to receive an email every time I receive a notification.”
• The digest should contain the notifications related to the activity I follow. As a participant, I want to receive a direct notification if someone mentions me or interacts with some content that I have created.
• If there’s something to configure server-side (crontab or whatever), implementers should have documentation regarding how to set this up.
• It must show the notifications ordered by spaces, for instance, if I’m following the

Describe alternatives you’ve considered

We could also not have a setting for this change, of behavior, but there could be cases where you actually want to receive 24-hour pings of what’s happening in a process, for instance, if you’re moderating it.

Additional context

There are a couple of proposals in Meta:

• https://meta.decidim.org/processes/roadmap/f/122/proposals/15048
• https://meta.decidim.org/processes/roadmap/f/122/proposals/14212

And there was even a PR (gid://metadecidim/Decidim::Hashtag/341/5875) already, but now that I’m reviewing that, there are some doubts regarding the PR: why expire notifications? why there’s a limit on how many notifications are sent by email?

Does this issue could impact on users private data?

No, it’s just showing another way to send notifications.

Acceptance criteria

• Given that I’m a participant,
  When I go to docs I have instructions on how to set this digest up.
• Given that I’m a participant,
  When I go to “My account” -> “Notifications settings”
  Then I see a new option in “Send notifications by email”
  “I want to receive a digest email every day with notifications.”
  that’s checked by default.
• Given that I’m a participant,
  When I go to “My account” -> “Notifications settings” and I have already checked the “I want to receive a digest email every day with notifications.”
  When I click in “I want to receive an email every time I receive a notification.”
  Then the “I want to receive a digest email every day with notifications.” is unchecked by default.
• Given that I’m a participant,
  When I go to “My account” -> “Notifications settings” and I have already checked the “I want to receive an email every time I receive a notification.”
  When I click in “I want to receive a digest email every day with notifications.”
  Then the “I want to receive an email every time I receive a notification.” is unchecked by default.
• Given that I’m a participant,
  When I have the “I want to receive a digest email every day with notifications.”
  Then I receive a digest email with all the activities I’m following on the last day.