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pipeline_matchmaker.go
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/
pipeline_matchmaker.go
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// Copyright 2018 The Nakama Authors
//
// 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 server
import (
"fmt"
"github.com/dgrijalva/jwt-go"
"github.com/gofrs/uuid"
"github.com/heroiclabs/nakama/rtapi"
"go.uber.org/zap"
"time"
)
func (p *Pipeline) matchmakerAdd(logger *zap.Logger, session Session, envelope *rtapi.Envelope) {
incoming := envelope.GetMatchmakerAdd()
// Minimum count.
minCount := int(incoming.MinCount)
if minCount < 2 {
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_BAD_INPUT),
Message: "Invalid minimum count, must be >= 2",
}}})
return
}
// Maximum count, must be at least minimum count.
maxCount := int(incoming.MaxCount)
if maxCount < minCount {
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_BAD_INPUT),
Message: "Invalid maximum count, must be >= minimum count",
}}})
return
}
// Run matchmaker add.
ticket, entries, err := p.matchmaker.Add(session, incoming.Query, minCount, maxCount, incoming.StringProperties, incoming.NumericProperties)
if err != nil {
logger.Error("Error adding to matchmaker", zap.Error(err))
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_RUNTIME_EXCEPTION),
Message: "Error adding to matchmaker",
}}})
return
}
// Return the ticket first whether or not matchmaking was successful.
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_MatchmakerTicket{MatchmakerTicket: &rtapi.MatchmakerTicket{
Ticket: ticket,
}}})
if entries == nil {
// Matchmaking was unsuccessful, no further messages to send out.
return
}
var tokenOrMatchID string
var isMatchID bool
// Check if there's a matchmaker matched runtime callback, call it, and see if it returns a match ID.
fn := p.runtime.MatchmakerMatched()
if fn != nil {
tokenOrMatchID, isMatchID, err = fn(entries)
if err != nil {
p.logger.Error("Error running Matchmaker Matched hook.", zap.Error(err))
}
}
if !isMatchID {
// If there was no callback or it didn't return a valid match ID always return at least a token.
token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
"mid": fmt.Sprintf("%v.", uuid.Must(uuid.NewV4()).String()),
"exp": time.Now().UTC().Add(30 * time.Second).Unix(),
})
tokenOrMatchID, _ = token.SignedString([]byte(p.config.GetSession().EncryptionKey))
}
users := make([]*rtapi.MatchmakerMatched_MatchmakerUser, 0, len(entries))
for _, entry := range entries {
users = append(users, &rtapi.MatchmakerMatched_MatchmakerUser{
Presence: &rtapi.UserPresence{
UserId: entry.Presence.UserId,
SessionId: entry.Presence.SessionId,
Username: entry.Presence.Username,
},
StringProperties: entry.StringProperties,
NumericProperties: entry.NumericProperties,
})
}
outgoing := &rtapi.Envelope{Message: &rtapi.Envelope_MatchmakerMatched{MatchmakerMatched: &rtapi.MatchmakerMatched{
// Ticket is set individually below for each recipient.
// Id set below to account for token or match ID case.
Users: users,
// Self is set individually below for each recipient.
}}}
if isMatchID {
outgoing.GetMatchmakerMatched().Id = &rtapi.MatchmakerMatched_MatchId{MatchId: tokenOrMatchID}
} else {
outgoing.GetMatchmakerMatched().Id = &rtapi.MatchmakerMatched_Token{Token: tokenOrMatchID}
}
for i, entry := range entries {
// Set per-recipient fields.
outgoing.GetMatchmakerMatched().Self = users[i]
outgoing.GetMatchmakerMatched().Ticket = entry.Ticket
// Route outgoing message.
p.router.SendToPresenceIDs(logger, []*PresenceID{&PresenceID{Node: entry.Presence.Node, SessionID: entry.SessionID}}, false, 0, outgoing)
}
}
func (p *Pipeline) matchmakerRemove(logger *zap.Logger, session Session, envelope *rtapi.Envelope) {
incoming := envelope.GetMatchmakerRemove()
// Ticket is required.
if incoming.Ticket == "" {
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_BAD_INPUT),
Message: "Invalid matchmaker ticket",
}}})
return
}
// Run matchmaker remove.
if err := p.matchmaker.Remove(session.ID(), incoming.Ticket); err != nil {
if err == ErrMatchmakerTicketNotFound {
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_BAD_INPUT),
Message: "Matchmaker ticket not found",
}}})
return
}
logger.Error("Error removing matchmaker ticket", zap.Error(err))
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid, Message: &rtapi.Envelope_Error{Error: &rtapi.Error{
Code: int32(rtapi.Error_RUNTIME_EXCEPTION),
Message: "Error removing matchmaker ticket",
}}})
return
}
session.Send(false, 0, &rtapi.Envelope{Cid: envelope.Cid})
}