[feature] Push notifications (#3587)

* Update push subscription API model to be Mastodon 4.0 compatible

* Add webpush-go dependency

# Conflicts:
#	go.sum

* Single-row table for storing instance's VAPID key pair

* Generate VAPID key pair during startup

* Add VAPID public key to instance info API

* Return VAPID public key when registering an app

* Store Web Push subscriptions in DB

* Add Web Push sender (similar to email sender)

* Add no-op push senders to most processor tests

* Test Web Push notifications from workers

* Delete Web Push subscriptions when account is deleted

* Implement push subscription API

* Linter fixes

* Update Swagger

* Fix enum to int migration

* Fix GetVAPIDKeyPair

* Create web push subscriptions table with indexes

* Log Web Push server error messages

* Send instance URL as Web Push JWT subject

* Accept any 2xx code as a success

* Fix malformed VAPID sub claim

* Use packed notification flags

* Remove unused date columns

* Add notification type for update notifications

Not used yet

* Make GetVAPIDKeyPair idempotent

and remove PutVAPIDKeyPair

* Post-rebase fixes

* go mod tidy

* Special-case 400 errors other than 408/429

Most client errors should remove the subscription.

* Improve titles, trim body to reasonable length

* Disallow cleartext HTTP for Web Push servers

* Fix lint

* Remove redundant index on unique column

Also removes redundant unique and notnull tags on ID column since these are implied by pk

* Make realsender.go more readable

* Use Tobi's style for wrapping errors

* Restore treating all 5xx codes as temporary problems

* Always load target account settings

* Stub `policy` and `standard`

* webpush.Sender: take type converter as ctor param

* Move webpush.MockSender and noopSender into testrig

1 files changed, 0 insertions, 44 deletions

diff --git a/internal/api/model/pushsubscription.go b/internal/api/model/pushsubscription.go
deleted file mode 100644
index 1e7708d94..000000000
--- a/internal/api/model/pushsubscription.go
+++ /dev/null
@@ -1,44 +0,0 @@
-// GoToSocial
-// Copyright (C) GoToSocial Authors admin@gotosocial.org
-// SPDX-License-Identifier: AGPL-3.0-or-later
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package model
-
-// PushSubscription represents a subscription to the push streaming server.
-type PushSubscription struct {
-	// The id of the push subscription in the database.
-	ID string `json:"id"`
-	// Where push alerts will be sent to.
-	Endpoint string `json:"endpoint"`
-	// The streaming server's VAPID key.
-	ServerKey string `json:"server_key"`
-	// Which alerts should be delivered to the endpoint.
-	Alerts *PushSubscriptionAlerts `json:"alerts"`
-}
-
-// PushSubscriptionAlerts represents the specific alerts that this push subscription will give.
-type PushSubscriptionAlerts struct {
-	// Receive a push notification when someone has followed you?
-	Follow bool `json:"follow"`
-	// Receive a push notification when a status you created has been favourited by someone else?
-	Favourite bool `json:"favourite"`
-	// Receive a push notification when someone else has mentioned you in a status?
-	Mention bool `json:"mention"`
-	// Receive a push notification when a status you created has been boosted by someone else?
-	Reblog bool `json:"reblog"`
-	// Receive a push notification when a poll you voted in or created has ended?
-	Poll bool `json:"poll"`
-}