mautrix-whatsapp/backfillqueue.go

62 lines
2 KiB
Go

// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2021 Tulir Asokan, Sumner Evans
//
// 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 <https://www.gnu.org/licenses/>.
package main
import (
"time"
log "maunium.net/go/maulogger/v2"
"maunium.net/go/mautrix-whatsapp/database"
)
type BackfillQueue struct {
BackfillQuery *database.BackfillQuery
ImmediateBackfillRequests chan *database.Backfill
DeferredBackfillRequests chan *database.Backfill
ReCheckQueue chan bool
log log.Logger
}
// RunLoop fetches backfills from the database, prioritizing immediate and forward backfills
func (bq *BackfillQueue) RunLoop(user *User) {
for {
if backfill := bq.BackfillQuery.GetNext(user.MXID); backfill != nil {
if backfill.BackfillType == database.BackfillImmediate || backfill.BackfillType == database.BackfillForward {
bq.ImmediateBackfillRequests <- backfill
} else if backfill.BackfillType == database.BackfillDeferred {
select {
case <-bq.ReCheckQueue:
// If a queue re-check is requested, interrupt sending the
// backfill request to the deferred channel so that
// immediate backfills can happen ASAP.
continue
case bq.DeferredBackfillRequests <- backfill:
}
} else {
bq.log.Debugfln("Unrecognized backfill type %d in queue", backfill.BackfillType)
}
backfill.MarkDone()
} else {
select {
case <-bq.ReCheckQueue:
case <-time.After(time.Minute):
}
}
}
}