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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package shared
import (
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"github.com/matrix-org/gomatrixserverlib"
)
// AssociateEDUWithDestination creates an association that the
// destination queues will use to determine which JSON blobs to send
// to which servers.
func (d *Database) AssociateEDUWithDestination(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
receipt *Receipt,
) error {
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
for _, nid := range receipt.nids {
if err := d.FederationSenderQueueEDUs.InsertQueueEDU(
ctx, // context
txn, // SQL transaction
"", // TODO: EDU type for coalescing
serverName, // destination server name
nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("InsertQueueEDU: %w", err)
}
}
return nil
})
}
// GetNextTransactionEDUs retrieves events from the database for
// the next pending transaction, up to the limit specified.
func (d *Database) GetNextTransactionEDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
limit int,
) (
edus []*gomatrixserverlib.EDU,
receipt *Receipt,
err error,
) {
err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
nids, err := d.FederationSenderQueueEDUs.SelectQueueEDUs(ctx, txn, serverName, limit)
if err != nil {
return fmt.Errorf("SelectQueueEDUs: %w", err)
}
receipt = &Receipt{
nids: nids,
}
blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, nids)
if err != nil {
return fmt.Errorf("SelectQueueJSON: %w", err)
}
for _, blob := range blobs {
var event gomatrixserverlib.EDU
if err := json.Unmarshal(blob, &event); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
edus = append(edus, &event)
}
return nil
})
return
}
// CleanEDUs cleans up all specified EDUs. This is done when a
// transaction was sent successfully.
func (d *Database) CleanEDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
receipt *Receipt,
) error {
if receipt == nil {
return errors.New("expected receipt")
}
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
if err := d.FederationSenderQueueEDUs.DeleteQueueEDUs(ctx, txn, serverName, receipt.nids); err != nil {
return err
}
var deleteNIDs []int64
for _, nid := range receipt.nids {
count, err := d.FederationSenderQueueEDUs.SelectQueueEDUReferenceJSONCount(ctx, txn, nid)
if err != nil {
return fmt.Errorf("SelectQueueEDUReferenceJSONCount: %w", err)
}
if count == 0 {
deleteNIDs = append(deleteNIDs, nid)
}
}
if len(deleteNIDs) > 0 {
if err := d.FederationSenderQueueJSON.DeleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
return fmt.Errorf("DeleteQueueJSON: %w", err)
}
}
return nil
})
}
// GetPendingEDUCount returns the number of EDUs waiting to be
// sent for a given servername.
func (d *Database) GetPendingEDUCount(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
) (int64, error) {
return d.FederationSenderQueueEDUs.SelectQueueEDUCount(ctx, nil, serverName)
}
// GetPendingServerNames returns the server names that have EDUs
// waiting to be sent.
func (d *Database) GetPendingEDUServerNames(
ctx context.Context,
) ([]gomatrixserverlib.ServerName, error) {
return d.FederationSenderQueueEDUs.SelectQueueEDUServerNames(ctx, nil)
}
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