forked from heroiclabs/nakama
/
pipeline_match.go
292 lines (256 loc) · 7.69 KB
/
pipeline_match.go
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// Copyright 2017 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"
"unicode/utf8"
"github.com/dgrijalva/jwt-go"
"go.uber.org/zap"
)
type matchDataFilter struct {
userID string
sessionID string
}
func (p *pipeline) matchCreate(logger *zap.Logger, session session, envelope *Envelope) {
matchID := generateNewId()
handle := session.Handle()
p.tracker.Track(session.ID(), "match:"+matchID, session.UserID(), PresenceMeta{
Handle: handle,
Format: session.Format(),
})
self := &UserPresence{
UserId: session.UserID(),
SessionId: session.ID(),
Handle: handle,
}
session.Send(&Envelope{CollationId: envelope.CollationId, Payload: &Envelope_Match{Match: &TMatch{Match: &Match{
MatchId: matchID,
Presences: []*UserPresence{self},
Self: self,
}}}}, true)
}
func (p *pipeline) matchJoin(logger *zap.Logger, session session, envelope *Envelope) {
e := envelope.GetMatchesJoin()
if len(e.Matches) == 0 {
session.Send(ErrorMessageBadInput(envelope.CollationId, "At least one item must be present"), true)
return
} else if len(e.Matches) > 1 {
logger.Warn("There are more than one item passed to the request - only processing the first item.")
}
m := e.Matches[0]
var matchID string
//var err error
allowEmpty := false
switch m.Id.(type) {
case *TMatchesJoin_MatchJoin_MatchId:
matchID = m.GetMatchId()
if matchID == "" {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Invalid match ID"), true)
return
}
case *TMatchesJoin_MatchJoin_Token:
tokenString := m.GetToken()
if controlCharsRegex.MatchString(tokenString) {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Match token cannot contain control chars"), true)
return
}
if !utf8.ValidString(tokenString) {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Match token must only contain valid UTF-8 bytes"), true)
return
}
token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
}
return p.hmacSecretByte, nil
})
if err != nil {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Match token is invalid"), true)
return
}
if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
matchID = claims["mid"].(string)
if matchID == "" {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Match token is invalid"), true)
return
}
} else {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Match token is invalid"), true)
return
}
allowEmpty = true
case nil:
session.Send(ErrorMessageBadInput(envelope.CollationId, "No match ID or token found"), true)
return
default:
session.Send(ErrorMessageBadInput(envelope.CollationId, "Unrecognized match ID or token"), true)
return
}
topic := "match:" + matchID
ps := p.tracker.ListByTopic(topic)
if !allowEmpty && len(ps) == 0 {
session.Send(ErrorMessage(envelope.CollationId, MATCH_NOT_FOUND, "Match not found"), true)
return
}
handle := session.Handle()
p.tracker.Track(session.ID(), topic, session.UserID(), PresenceMeta{
Handle: handle,
Format: session.Format(),
})
userPresences := make([]*UserPresence, len(ps)+1)
for i := 0; i < len(ps); i++ {
p := ps[i]
userPresences[i] = &UserPresence{
UserId: p.UserID,
SessionId: p.ID.SessionID,
Handle: p.Meta.Handle,
}
}
self := &UserPresence{
UserId: session.UserID(),
SessionId: session.ID(),
Handle: handle,
}
userPresences[len(ps)] = self
session.Send(&Envelope{CollationId: envelope.CollationId, Payload: &Envelope_Matches{Matches: &TMatches{
Matches: []*Match{
&Match{
MatchId: matchID,
Presences: userPresences,
Self: self,
},
},
}}}, true)
}
func (p *pipeline) matchLeave(logger *zap.Logger, session session, envelope *Envelope) {
e := envelope.GetMatchesLeave()
if len(e.MatchIds) == 0 {
session.Send(ErrorMessageBadInput(envelope.CollationId, "At least one item must be present"), true)
return
} else if len(e.MatchIds) > 1 {
logger.Warn("There are more than one item passed to the request - only processing the first item.")
}
matchID := e.MatchIds[0]
if matchID == "" {
session.Send(ErrorMessageBadInput(envelope.CollationId, "Invalid match ID"), true)
return
}
topic := "match:" + matchID
ps := p.tracker.ListByTopic(topic)
if len(ps) == 0 {
session.Send(ErrorMessage(envelope.CollationId, MATCH_NOT_FOUND, "Match not found"), true)
return
}
found := false
for _, p := range ps {
if p.ID.SessionID == session.ID() && p.UserID == session.UserID() {
found = true
break
}
}
// If sender wasn't part of the match.
if !found {
session.Send(ErrorMessage(envelope.CollationId, MATCH_NOT_FOUND, "Match not found"), true)
return
}
p.tracker.Untrack(session.ID(), topic, session.UserID())
session.Send(&Envelope{CollationId: envelope.CollationId}, true)
}
func (p *pipeline) matchDataSend(logger *zap.Logger, session session, envelope *Envelope, reliable bool) {
incoming := envelope.GetMatchDataSend()
matchID := incoming.MatchId
//matchID, err := uuid.FromBytes(matchIDBytes)
if matchID == "" {
return
}
topic := "match:" + matchID
filterPresences := false
var filters []*matchDataFilter
if len(incoming.Presences) != 0 {
filterPresences = true
filters = make([]*matchDataFilter, len(incoming.Presences))
for i := 0; i < len(incoming.Presences); i++ {
userID := incoming.Presences[i].UserId
if userID == "" {
return
}
sessionID := incoming.Presences[i].SessionId
if sessionID == "" {
return
}
filters[i] = &matchDataFilter{userID: userID, sessionID: sessionID}
}
}
// TODO check membership before looking up all members.
ps := p.tracker.ListByTopic(topic)
if len(ps) == 0 {
return
}
senderFound := false
for i := 0; i < len(ps); i++ {
p := ps[i]
if p.ID.SessionID == session.ID() && p.UserID == session.UserID() {
// Don't echo back to sender.
ps[i] = ps[len(ps)-1]
ps = ps[:len(ps)-1]
senderFound = true
if !filterPresences {
break
} else {
i--
}
} else if filterPresences {
// Check if this presence is specified in the filters.
filterFound := false
for j := 0; j < len(filters); j++ {
if filter := filters[j]; p.ID.SessionID == filter.sessionID && p.UserID == filter.userID {
// If a filter matches, drop it.
filters[j] = filters[len(filters)-1]
filters = filters[:len(filters)-1]
filterFound = true
break
}
}
if !filterFound {
// If this presence wasn't in the filters, it's not needed.
ps[i] = ps[len(ps)-1]
ps = ps[:len(ps)-1]
i--
}
}
}
// If sender wasn't in the presences for this match, they're not a member.
if !senderFound {
return
}
// Check if there are any recipients left.
if len(ps) == 0 {
return
}
outgoing := &Envelope{
Payload: &Envelope_MatchData{
MatchData: &MatchData{
MatchId: matchID,
Presence: &UserPresence{
UserId: session.UserID(),
SessionId: session.ID(),
Handle: session.Handle(),
},
OpCode: incoming.OpCode,
Data: incoming.Data,
},
},
}
p.messageRouter.Send(logger, ps, outgoing, reliable)
}