tavern/core/group_party.go

package core

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"strings"
	"time"

	"github.com/go-redis/redis/v8"
	"repositories.action2quare.com/ayo/gocommon"
	"repositories.action2quare.com/ayo/gocommon/logger"
	"repositories.action2quare.com/ayo/gocommon/wshandler"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
)

type accountID = primitive.ObjectID
type groupID = primitive.ObjectID

func makeTid(gid groupID, in accountID) string {
	var out primitive.ObjectID
	for i := range in {
		out[12-i-1] = gid[i] ^ in[12-i-1]
	}
	return out.Hex()
}

func midFromTid(gid groupID, in string) accountID {
	h, _ := primitive.ObjectIDFromHex(in)

	var out accountID
	for i := range h {
		out[12-i-1] = gid[i] ^ h[12-i-1]
	}
	return out
}

type Invitation struct {
	GroupID     groupID `json:"_gid"`
	TicketID    string  `json:"_tid"`
	Inviter     bson.M  `json:"_inviter"` // memberDoc.Body
	ExpireAtUTC int64   `json:"_expire_at_utc"`
}

// 플레이어한테 공유하는 멤버 정보
type memberDoc struct {
	Body         bson.M `json:"_body"`
	Invite       bool   `json:"_invite"`
	InviteExpire int64  `json:"_invite_exp"`
}

type InvitationFail bson.M

type partyDoc struct {
	Members  map[string]any `json:"_members"`
	InCharge string         `json:"_incharge"`
	Gid      string         `json:"_gid"`

	rh *gocommon.RedisonHandler
	id groupID
}

func (gd *partyDoc) loadMemberFull(tid string) (bson.M, error) {
	full, err := gd.rh.JSONGet(gd.strid(), "$._members."+tid)
	if err != nil {
		return nil, err
	}

	bt := []byte(full.(string))
	bt = bt[1 : len(bt)-1]

	var doc bson.M
	if err = json.Unmarshal(bt, &doc); err != nil {
		return nil, err
	}

	return doc, nil
}

func (gd *partyDoc) loadFull() (doc bson.M) {
	// 새 멤버에 그룹 전체를 알림
	full, err := gd.rh.JSONGet(gd.strid(), "$")
	if err == nil {
		bt := []byte(full.(string))
		bt = bt[1 : len(bt)-1]
		err = json.Unmarshal(bt, &doc)
		if err != nil {
			logger.Println("loadFull err :", err)
		}
	} else {
		logger.Println("loadFull err :", err)
	}
	return
}

func (gd *partyDoc) strid() string {
	if len(gd.Gid) == 0 {
		gd.Gid = gd.id.Hex()
	}
	return gd.Gid
}

func (gd *partyDoc) tid(in accountID) string {
	return makeTid(gd.id, in)
}

func (gd *partyDoc) mid(tid string) accountID {
	tidobj, _ := primitive.ObjectIDFromHex(tid)
	var out primitive.ObjectID
	for i := range tidobj {
		out[12-i-1] = gd.id[i] ^ tidobj[12-i-1]
	}
	return out
}

func (gd *partyDoc) addInvite(mid accountID, body bson.M, ttl time.Duration, max int) (*memberDoc, error) {
	targetmid := mid
	targetbody := body

	// 초대 가능한 빈 자리가 있나
	tids, err := gd.rh.JSONObjKeys(gd.strid(), "$._members")
	if err != nil {
		return nil, err
	}

	now := time.Now().UTC()
	createNewDoc := func() *memberDoc {
		return &memberDoc{
			Body:         targetbody,
			Invite:       true,
			InviteExpire: now.Add(ttl).Unix(),
		}
	}

	newtid := gd.tid(targetmid)
	if len(tids) < max {
		// 빈자리를 찾았다.
		newdoc := createNewDoc()
		_, err := gd.rh.JSONSet(gd.strid(), "$._members."+newtid, newdoc)
		return newdoc, err
	}

	expires, err := gd.rh.JSONGetInt64(gd.strid(), "$._members.._invite_exp")
	if err != nil {
		return nil, err
	}

	var delpaths []string
	for i, expire := range expires {
		if expire < now.Unix() {
			// 만료된 초대가 있네? 지우자
			delpaths = append(delpaths, "$._members."+tids[i])
		}
	}

	if len(delpaths) == 0 {
		// 빈자리가 없다
		return nil, nil
	}

	if err := gd.rh.JSONMDel(gd.strid(), delpaths); err != nil {
		return nil, err
	}

	newdoc := createNewDoc()
	_, err = gd.rh.JSONSet(gd.strid(), "$._members."+newtid, newdoc)
	return newdoc, err
}

func (gd *partyDoc) addMember(mid accountID, character bson.M) (bson.M, error) {
	tid := gd.tid(mid)
	prefix := "$._members." + tid

	if _, err := gd.rh.JSONSet(gd.strid(), prefix+"._body", character, gocommon.RedisonSetOptionXX); err != nil {
		return nil, err
	}

	if err := gd.rh.JSONMDel(gd.strid(), []string{prefix + "._invite", prefix + "._invite_exp"}); err != nil {
		return nil, err
	}
	gd.rh.Persist(gd.rh.Context(), gd.strid()).Result()

	return gd.loadMemberFull(tid)
}

func (gd *partyDoc) removeMemberByTid(tid string) error {
	_, err := gd.rh.JSONDel(gd.strid(), "$._members."+tid)
	if err != nil {
		return err
	}

	counts, err := gd.rh.JSONObjLen(gd.strid(), "$._members")
	if err != nil {
		return err
	}

	if len(counts) > 0 && counts[0] == 0 {
		_, err = gd.rh.Del(gd.rh.Context(), gd.strid()).Result()
	}

	return err
}

func (gd *partyDoc) removeMember(mid accountID) error {
	return gd.removeMemberByTid(gd.tid(mid))
}

func (gd *partyDoc) getMembers() (map[string]any, error) {
	res, err := gd.rh.JSONGet(gd.strid(), "$._members")
	if err != nil {
		return nil, err
	}

	var temp []map[string]any
	err = json.Unmarshal([]byte(res.(string)), &temp)
	if err != nil {
		return nil, err
	}

	out := make(map[string]any)
	for k, v := range temp[0] {
		body := v.(map[string]any)["_body"]
		out[gd.mid(k).Hex()] = body
	}

	return out, nil
}

type partyConfig struct {
	InviteExpire int32 `json:"invite_ttl"` // 그룹이 개인에게 보낸 초대장 만료 기한
	MaxMember    int   `json:"max_member"`

	Name string
}

type groupParty struct {
	partyConfig
	sendUpstreamMessage func(*wshandler.UpstreamMessage)
	enterRoom           func(groupID, accountID)
	leaveRoom           func(groupID, accountID)
	rh                  *gocommon.RedisonHandler
}

func (gp *groupParty) Initialize(tv *Tavern, cfg configDocument) error {
	rem, _ := json.Marshal(cfg)
	err := json.Unmarshal(rem, &gp.partyConfig)
	if err != nil {
		return err
	}

	gp.rh = tv.redison
	gp.sendUpstreamMessage = func(msg *wshandler.UpstreamMessage) {
		tv.wsh.SendUpstreamMessage(msg)
	}
	gp.enterRoom = func(gid groupID, accid accountID) {
		tv.wsh.EnterRoom(gid.Hex(), accid)
	}
	gp.leaveRoom = func(gid groupID, accid accountID) {
		tv.wsh.LeaveRoom(gid.Hex(), accid)
	}

	return nil
}

func (gp *groupParty) RegisterApiFunctions() {

}

// JoinParty : 그룹에 참가
// - type : 그룹 타입
// - 그룹 타입에 맞는 키(주로 _id)
// - member_id : 참가 멤버의 아이디
// - body : 멤버의 속성 bson document
func (gp *groupParty) JoinParty(w http.ResponseWriter, r *http.Request) {
	var data struct {
		Gid       primitive.ObjectID
		Mid       primitive.ObjectID
		First     bool
		Character bson.M
	}
	if err := gocommon.MakeDecoder(r).Decode(&data); err != nil {
		logger.Println("JoinParty failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	character := data.Character
	gid := data.Gid
	mid := data.Mid

	if gid.IsZero() || mid.IsZero() {
		logger.Println("JoinParty failed. mid should be exist")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	gd, err := gp.find(gid)
	if err != nil {
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	if gd == nil {
		// 그룹이 없다. 실패
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	// 내 정보 업데이트할 때에도 사용됨
	if !data.First {
		// 이미 멤버여야 재입장 가능
		path := "$._members." + gd.tid(mid) + "._body"
		if _, err := gd.rh.JSONSet(gd.strid(), path, character, gocommon.RedisonSetOptionXX); err != nil {
			// 멤버가 아니네?
			logger.Error("JoinParty failed :", err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
	}

	gp.rh.JSONSet(mid.Hex(), "$.party", bson.M{"id": gid.Hex()})
	memdoc, err := gd.addMember(mid, character)
	if err != nil {
		logger.Error("JoinParty failed :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	// 기존 유저에게 새 유저 알림
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gid.Hex(),
		Body: map[string]any{
			gd.tid(mid): memdoc,
		},
		Tag: []string{"MemberDocFull"},
	})

	gp.enterRoom(gid, mid)

	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: mid.Hex(),
		Body:   gd.loadFull(),
		Tag:    []string{"GroupDocFull"},
	})
}

func (gp *groupParty) ConditionalClearPartyMember(w http.ResponseWriter, r *http.Request) {
	var doc struct {
		Gid string
		Mid string
	}

	// accid가 접속해 있지 않으면 파티에서 나간 걸로 간주하고
	// accid가 접속해 있으면 아무것도 하지 않는다.
	if err := gocommon.MakeDecoder(r).Decode(&doc); err != nil {
		logger.Println("ConditionalClearPartyMember failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	pids, err := gp.rh.JSONGetString(doc.Mid, "$.party.id")
	if err != nil {
		logger.Error("ConditionalClearPartyMember failed. gp.rh.JSONGetString returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	removeMember := func() {
		gid, _ := primitive.ObjectIDFromHex(doc.Gid)
		mid, _ := primitive.ObjectIDFromHex(doc.Mid)
		gd := partyDoc{
			id: gid,
			rh: gp.rh,
		}
		gd.removeMember(mid)

		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: "#" + doc.Gid,
			Body: bson.M{
				gd.tid(mid): bson.M{},
			},
			Tag: []string{"MemberDocFull"},
		})
	}

	if len(pids) == 0 {
		// 없다.
		// doc.Gid에서 제거
		removeMember()
	} else if pids[0] != doc.Gid {
		// 다른 파티? 기존 파티에서 제거
		removeMember()
	}
}

// InviteToParty : 초대
// - type : 초대 타입 (required)
// - from : 초대하는 자 (required)
// - to : 초대받는 자 (required)
// - timeout : 초대 유지시간(optional. 없으면 config 기본 값)
// - (body) : 검색시 노출되는 document
func (gp *groupParty) InviteToParty(w http.ResponseWriter, r *http.Request) {
	var doc struct {
		Gid             primitive.ObjectID
		Mid             primitive.ObjectID
		Target          primitive.ObjectID
		Inviter         bson.M
		Invitee         bson.M
		InitialPartyDoc bson.M
	}

	if err := gocommon.MakeDecoder(r).Decode(&doc); err != nil {
		logger.Println("InviteToParty failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	targetid := doc.Target
	gid := doc.Gid
	mid := doc.Mid

	// targetid에 초대한 mid가 들어있다.
	success, err := gp.rh.SetNX(context.Background(), "inv."+targetid.Hex(), mid.Hex(), time.Duration(gp.InviteExpire)*time.Second).Result()
	if err != nil {
		logger.Println("InviteToParty failed. gp.rh.SetNX() return err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	if !success {
		// 이미 초대 중이다.
		// inviter한테 알려줘야 한다.
		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: mid.Hex(),
			Body:   doc.Invitee,
			Tag:    []string{"InvitationFail"},
		})
		return
	}

	gd, err := gp.find(gid)
	if err != nil {
		logger.Println("InviteToParty failed. gp.find() return err :", err)
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	if gd == nil {
		gid = primitive.NewObjectID()
		gd, err = gp.createGroup(gid, mid, doc.Inviter, doc.InitialPartyDoc)
		if err != nil {
			logger.Println("InviteToParty failed. gp.createGroup() return err :", err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		// 내가 wshandler room에 입장
		gp.enterRoom(gid, mid)
		gp.rh.JSONSet(mid.Hex(), "$.party", bson.M{"id": gid.Hex()})

		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: mid.Hex(),
			Body:   gd,
			Tag:    []string{"GroupDocFull"},
		})
	}

	newdoc, err := gd.addInvite(targetid, doc.Invitee, time.Duration(gp.InviteExpire+1)*time.Second, gp.MaxMember)
	if err != nil {
		logger.Println("InviteToParty failed. gp.addInvite() return err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	// invitee에게 알림
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: targetid.Hex(),
		Body: Invitation{
			GroupID:     gid,
			TicketID:    gd.tid(targetid),
			Inviter:     doc.Inviter,
			ExpireAtUTC: newdoc.InviteExpire,
		},
		Tag: []string{"Invitation"},
	})

	// 그룹에게 알림
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gid.Hex(),
		Body: bson.M{
			gd.tid(targetid): bson.M{
				"nickname": doc.Invitee["nickname"],
				"_invite":  true,
			},
		},
		Tag: []string{"MemberDocFull"},
	})
}

func (gp *groupParty) AcceptPartyInvitation(w http.ResponseWriter, r *http.Request) {
	var doc struct {
		Gid       primitive.ObjectID
		Mid       primitive.ObjectID
		Tid       string
		Character bson.M
	}
	if err := gocommon.MakeDecoder(r).Decode(&doc); err != nil {
		logger.Println("AcceptPartyInvitation failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	gid := doc.Gid
	mid := doc.Mid
	member := doc.Character

	cnt, err := gp.rh.Del(context.Background(), "inv."+mid.Hex()).Result()
	if err != nil {
		logger.Error("AcceptPartyInvitation failed. gp.rh.Del returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	if cnt == 0 {
		// 만료됨
		w.WriteHeader(http.StatusGatewayTimeout)
		return
	}

	pids, err := gp.rh.JSONGetString(mid.Hex(), "$.party.id")
	if err != nil {
		logger.Error("AcceptPartyInvitation failed. gp.rh.JSONGetString returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	if len(pids) > 0 && len(pids[0]) > 0 {
		// 기존에 이미 파티에 들어가 있다.
		// 기존 파티에서는 탈퇴
		oldgid, _ := primitive.ObjectIDFromHex(pids[0])
		oldgd := &partyDoc{
			id: oldgid,
			rh: gp.rh,
		}

		// gid에는 제거 메시지 보냄
		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: "#" + oldgd.strid(),
			Body: bson.M{
				oldgd.tid(mid): bson.M{},
			},
			Tag: []string{"MemberDocFull"},
		})

		gp.leaveRoom(oldgid, mid)
	}

	gd := &partyDoc{
		id: gid,
		rh: gp.rh,
	}

	memberDoc, err := gd.addMember(mid, member)
	if err == nil {
		// 기존 멤버에게 새 멤버를 알림
		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: "#" + gid.Hex(),
			Body: map[string]any{
				gd.tid(mid): memberDoc,
			},
			Tag: []string{"MemberDocFull"},
		})

		gp.enterRoom(gid, mid)

		// 현재 내 파티를 기록
		gp.rh.JSONSet(mid.Hex(), "$.party", bson.M{"id": gid.Hex()})

		// 새 멤버에 그룹 전체를 알림
		gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
			Target: mid.Hex(),
			Body:   gd.loadFull(),
			Tag:    []string{"GroupDocFull"},
		})
	} else {
		logger.Println("AcceptPartyInvitation failed. group.AcceptPartyInvitation returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
	}
}

func (gp *groupParty) QueryPartyMemberState(w http.ResponseWriter, r *http.Request) {
	var mid primitive.ObjectID
	if err := gocommon.MakeDecoder(r).Decode(&mid); err != nil {
		logger.Println("DenyPartyInvitation failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	if cnt, _ := gp.rh.Exists(gp.rh.Context(), mid.Hex()).Result(); cnt == 0 {
		return
	}

	states, _ := gp.rh.JSONGetString(mid.Hex(), "$.party.state")
	if len(states) > 0 && len(states[0]) > 0 {
		gocommon.MakeEncoder(w, r).Encode(states[0])
	} else {
		gocommon.MakeEncoder(w, r).Encode("connected")
	}
}

func (gp *groupParty) updateMemberDocument(gid groupID, mid accountID, doc bson.M) error {
	gd := &partyDoc{
		id: gid,
		rh: gp.rh,
	}
	prefixPath := fmt.Sprintf("$._members.%s.", gd.tid(mid))
	err := gp.rh.JSONMSetRel(gd.strid(), prefixPath, doc)
	if err != nil {
		return err
	}

	if newstate, ok := doc["_state"]; ok {
		gp.rh.JSONSet(mid.Hex(), "$.party.state", newstate)
	}

	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gid.Hex(),
		Body: map[string]any{
			gd.tid(mid): doc,
		},
		Tag: []string{"MemberDocFragment"},
	})
	return nil
}

func (gp *groupParty) updatePartyDocument(gid groupID, frag bson.M) error {
	gd := partyDoc{
		id: gid,
		rh: gp.rh,
	}
	if err := gp.rh.JSONMSetRel(gd.strid(), "$.", frag); err != nil {
		return err
	}
	// 업데이트 알림
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gid.Hex(),
		Body:   frag,
		Tag:    []string{"GroupDocFragment"},
	})
	return nil
}

func (gp *groupParty) UpdatePartyDocument(w http.ResponseWriter, r *http.Request) {
	var data struct {
		Gid primitive.ObjectID
		Doc bson.M
	}

	if err := gocommon.MakeDecoder(r).Decode(&data); err != nil {
		logger.Println("UpdatePartyDocument failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	gid := data.Gid
	frag := data.Doc

	if err := gp.updatePartyDocument(gid, frag); err != nil {
		logger.Error("UpdatePartyDocument failed. group.UpdatePartyDocument returns err :", err)
		w.WriteHeader(http.StatusBadRequest)
		return
	}
}

func (gp *groupParty) QueryPartyMembers(w http.ResponseWriter, r *http.Request) {
	var gid primitive.ObjectID
	if err := gocommon.MakeDecoder(r).Decode(&gid); err != nil {
		logger.Println("QueryPartyMembers failed. DecodeGob returns err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	gd := partyDoc{
		id: gid,
		rh: gp.rh,
	}

	members, err := gd.getMembers()
	if err != nil {
		logger.Error("QueryPartyMembers failed. group.QueryPartyMembers returns err :", err)
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	if err := gocommon.MakeEncoder(w, r).Encode(members); err != nil {
		logger.Error("QueryPartyMembers failed. writeBsonDoc return err :", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}
}

func (gp *groupParty) createGroup(newid groupID, charge accountID, chargeDoc bson.M, initialGroupDoc bson.M) (*partyDoc, error) {
	tid := makeTid(newid, charge)

	gd := &partyDoc{
		Members: map[string]any{
			tid: &memberDoc{
				Body:         chargeDoc,
				Invite:       false,
				InviteExpire: 0,
			},
		},
		InCharge: tid,
		Gid:      newid.Hex(),

		rh: gp.rh,
		id: newid,
	}

	var err error
	if initialGroupDoc != nil {
		initialGroupDoc["_members"] = gd.Members
		initialGroupDoc["_incharge"] = gd.InCharge
		initialGroupDoc["_gid"] = gd.Gid

		_, err = gp.rh.JSONSet(gd.strid(), "$", initialGroupDoc, gocommon.RedisonSetOptionNX)
	} else {
		_, err = gp.rh.JSONSet(gd.strid(), "$", gd, gocommon.RedisonSetOptionNX)
	}

	if err != nil {
		return nil, err
	}

	return gd, nil
}

func (gp *groupParty) find(id groupID) (*partyDoc, error) {
	if id.IsZero() {
		return nil, nil
	}

	_, err := gp.rh.JSONObjLen(id.Hex(), "$")
	if err == redis.Nil {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}

	return &partyDoc{
		rh: gp.rh,
		id: id,
	}, nil
}

func (gp *groupParty) ClientDisconnected(msg string, callby *wshandler.Sender) {
	gids, _ := gp.rh.JSONGetString(callby.Accid.Hex(), "$.party.id")

	if len(gids) > 0 && len(gids[0]) > 0 {
		// mid한테는 빈 GroupDocFull을 보낸다. 그러면 지워짐
		gidstr := gids[0]
		gid, _ := primitive.ObjectIDFromHex(gidstr)

		// 나를 먼저 룸에서 빼야 나한테 메시지가 안감
		gp.leaveRoom(gid, callby.Accid)

		if msg != "pending" {
			// gid에는 제거 메시지 보냄
			gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
				Target: "#" + gidstr,
				Body: bson.M{
					makeTid(gid, callby.Accid): bson.M{},
				},
				Tag: []string{"MemberDocFull"},
			})
		}
	}
}

func (gp *groupParty) UpdatePartyMemberDocumentDirect(ctx wshandler.ApiCallContext) {
	gidobj, _ := primitive.ObjectIDFromHex(ctx.Arguments[0].(string))
	doc := ctx.Arguments[1].(map[string]any)

	gp.updateMemberDocument(gidobj, ctx.CallBy.Accid, doc)
}

func (gp *groupParty) UpdatePartyDocumentDirect(ctx wshandler.ApiCallContext) {
	gidobj, _ := primitive.ObjectIDFromHex(ctx.Arguments[0].(string))
	doc := ctx.Arguments[1].(map[string]any)

	gp.updatePartyDocument(gidobj, doc)
}

func (gp *groupParty) LeaveParty(ctx wshandler.ApiCallContext) {
	gids, _ := gp.rh.JSONGetString(ctx.CallBy.Accid.Hex(), "$.party.id")

	if len(gids) == 0 || len(gids[0]) == 0 {
		return
	}
	// mid한테는 빈 GroupDocFull을 보낸다. 그러면 지워짐
	gidstr := gids[0]
	gid, _ := primitive.ObjectIDFromHex(gidstr)
	mid := ctx.CallBy.Accid
	tid := ctx.Arguments[0].(string)

	gd := partyDoc{
		id: gid,
		rh: gp.rh,
	}

	var err error
	if len(tid) > 0 {
		if tid != gd.tid(mid) {
			// mid가 incharge여야 한다. 그래야 tid를 쫓아낼 수 있음
			incharge, err := gp.rh.JSONGet(gd.strid(), "$._incharge")
			if err != nil {
				logger.Println("LeaveParty failed. gp.rh.JSONGet returns err :", err)
				return
			}
			if !strings.Contains(incharge.(string), gd.tid(mid)) {
				// incharge가 아니네?
				logger.Println("LeaveParty failed. mid is not incharge")
				return
			}
			mid = midFromTid(gd.id, tid)
		}
		err = gd.removeMemberByTid(tid)
	} else {
		err = gd.removeMember(mid)
		// 내가 나갔다
		gp.rh.JSONDel(mid.Hex(), "$.party.id")
	}

	if err != nil {
		logger.Println("LeaveParty failed. gd.removeMember returns err :", err)
		return
	}

	// mid한테는 빈 GroupDocFull을 보낸다. 그러면 지워짐
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: mid.Hex(),
		Body:   bson.M{"gid": gid},
		Tag:    []string{"GroupDocFull", gid.Hex()},
	})

	// gid에는 제거 메시지 보냄
	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gd.strid(),
		Body: bson.M{
			tid: bson.M{},
		},
		Tag: []string{"MemberDocFull"},
	})

	gp.leaveRoom(gid, mid)
}

func (gp *groupParty) DenyPartyInvitation(ctx wshandler.ApiCallContext) {
	gid, _ := primitive.ObjectIDFromHex(ctx.Arguments[0].(string))
	mid := ctx.CallBy.Accid

	gp.rh.Del(context.Background(), "inv."+mid.Hex()).Result()
	gd := partyDoc{
		id: gid,
		rh: gp.rh,
	}
	gd.removeMember(mid)

	gp.sendUpstreamMessage(&wshandler.UpstreamMessage{
		Target: "#" + gd.strid(),
		Body: bson.M{
			gd.tid(mid): bson.M{},
		},
		Tag: []string{"MemberDocFull"},
	})
}