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membership_updater.go
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membership_updater.go
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package shared
import (
"context"
"database/sql"
"fmt"
"github.com/neilalexander/harmony/internal/gomatrixserverlib"
"github.com/neilalexander/harmony/roomserver/storage/tables"
"github.com/neilalexander/harmony/roomserver/types"
)
type MembershipUpdater struct {
transaction
d *Database
roomNID types.RoomNID
targetUserNID types.EventStateKeyNID
oldMembership tables.MembershipState
}
func NewMembershipUpdater(
ctx context.Context, d *Database, txn *sql.Tx, roomID, targetUserID string,
targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
) (*MembershipUpdater, error) {
var roomNID types.RoomNID
var targetUserNID types.EventStateKeyNID
var err error
err = d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error {
roomNID, err = d.assignRoomNID(ctx, txn, roomID, roomVersion)
if err != nil {
return err
}
targetUserNID, err = d.assignStateKeyNID(ctx, txn, targetUserID)
if err != nil {
return err
}
return nil
})
if err != nil {
return nil, err
}
return d.membershipUpdaterTxn(ctx, txn, roomNID, targetUserNID, targetLocal)
}
func (d *Database) membershipUpdaterTxn(
ctx context.Context,
txn *sql.Tx,
roomNID types.RoomNID,
targetUserNID types.EventStateKeyNID,
targetLocal bool,
) (*MembershipUpdater, error) {
err := d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error {
if err := d.MembershipTable.InsertMembership(ctx, txn, roomNID, targetUserNID, targetLocal); err != nil {
return fmt.Errorf("d.MembershipTable.InsertMembership: %w", err)
}
return nil
})
if err != nil {
return nil, fmt.Errorf("u.d.Writer.Do: %w", err)
}
membership, err := d.MembershipTable.SelectMembershipForUpdate(ctx, txn, roomNID, targetUserNID)
if err != nil {
return nil, err
}
return &MembershipUpdater{
transaction{ctx, txn}, d, roomNID, targetUserNID, membership,
}, nil
}
// IsInvite implements types.MembershipUpdater
func (u *MembershipUpdater) IsInvite() bool {
return u.oldMembership == tables.MembershipStateInvite
}
// IsJoin implements types.MembershipUpdater
func (u *MembershipUpdater) IsJoin() bool {
return u.oldMembership == tables.MembershipStateJoin
}
// IsLeave implements types.MembershipUpdater
func (u *MembershipUpdater) IsLeave() bool {
return u.oldMembership == tables.MembershipStateLeaveOrBan
}
// IsKnock implements types.MembershipUpdater
func (u *MembershipUpdater) IsKnock() bool {
return u.oldMembership == tables.MembershipStateKnock
}
func (u *MembershipUpdater) Delete() error {
if _, err := u.d.InvitesTable.UpdateInviteRetired(u.ctx, u.txn, u.roomNID, u.targetUserNID); err != nil {
return err
}
return u.d.MembershipTable.DeleteMembership(u.ctx, u.txn, u.roomNID, u.targetUserNID)
}
func (u *MembershipUpdater) Update(newMembership tables.MembershipState, event *types.Event) (bool, []string, error) {
var inserted bool // Did the query result in a membership change?
var retired []string // Did we retire any updates in the process?
return inserted, retired, u.d.Writer.Do(u.d.DB, u.txn, func(txn *sql.Tx) error {
senderUserNID, err := u.d.assignStateKeyNID(u.ctx, u.txn, string(event.SenderID()))
if err != nil {
return fmt.Errorf("u.d.AssignStateKeyNID: %w", err)
}
inserted, err = u.d.MembershipTable.UpdateMembership(u.ctx, u.txn, u.roomNID, u.targetUserNID, senderUserNID, newMembership, event.EventNID, false)
if err != nil {
return fmt.Errorf("u.d.MembershipTable.UpdateMembership: %w", err)
}
if !inserted {
return nil
}
switch {
case u.oldMembership != tables.MembershipStateInvite && newMembership == tables.MembershipStateInvite:
inserted, err = u.d.InvitesTable.InsertInviteEvent(
u.ctx, u.txn, event.EventID(), u.roomNID, u.targetUserNID, senderUserNID, event.JSON(),
)
if err != nil {
return fmt.Errorf("u.d.InvitesTable.InsertInviteEvent: %w", err)
}
case u.oldMembership == tables.MembershipStateInvite && newMembership != tables.MembershipStateInvite:
retired, err = u.d.InvitesTable.UpdateInviteRetired(
u.ctx, u.txn, u.roomNID, u.targetUserNID,
)
if err != nil {
return fmt.Errorf("u.d.InvitesTables.UpdateInviteRetired: %w", err)
}
}
return nil
})
}