fix(guild): implement alliance application toggle (#166)

Alliance applications were hardcoded to always-open. Add a `recruiting`
column to guild_alliances and handle OperateJoint actions 0x06 (Allow)
and 0x07 (Deny) confirmed via Wii U debug symbols. Only the parent
guild leader can toggle the setting, matching the existing disband guard.

docs/technical-debt.md

@@ -28,7 +28,7 @@ These TODOs represent features that are visibly broken for players.
 |----------|-------|--------|---------|
 | `model_character.go:88,101,113` | `TODO: fix bookshelf data pointer` for G10-ZZ, F4-F5, and S6 versions | Wrong pointer corrupts character save reads for three game versions. Offset analysis shows all three are off by exactly 14810 vs the consistent delta pattern of other fields — but needs validation against actual save data. | [#164](https://github.com/Mezeporta/Erupe/issues/164) |
 | `handlers_achievement.go:117` | `TODO: Notify on rank increase` — always returns `false` | Achievement rank-up notifications are silently suppressed. Requires understanding what `MhfDisplayedAchievement` (currently an empty handler) sends to track "last displayed" state. | [#165](https://github.com/Mezeporta/Erupe/issues/165) |
-| `handlers_guild_info.go:443` | `TODO: Enable GuildAlliance applications` — hardcoded `true` | Guild alliance applications are always open regardless of setting. Needs research into where the toggle originates. | [#166](https://github.com/Mezeporta/Erupe/issues/166) |
+| ~~`handlers_guild_info.go:443`~~ | ~~`TODO: Enable GuildAlliance applications` — hardcoded `true`~~ | ~~Guild alliance applications are always open regardless of setting.~~ **Fixed.** Added `recruiting` column to `guild_alliances`, wired `OperateJoint` actions `0x06`/`0x07`, reads from DB. | [#166](https://github.com/Mezeporta/Erupe/issues/166) |
 | `handlers_session.go:410` | `TODO(Andoryuuta): log key index off-by-one` | Known off-by-one in log key indexing is unresolved | [#167](https://github.com/Mezeporta/Erupe/issues/167) |
 | `handlers_session.go:551` | `TODO: This case might be <=G2` | Uncertain version detection in switch case | [#167](https://github.com/Mezeporta/Erupe/issues/167) |
 | `handlers_session.go:714` | `TODO: Retail returned the number of clients in quests` | Player count reported to clients does not match retail behavior | [#167](https://github.com/Mezeporta/Erupe/issues/167) |
@@ -92,6 +92,6 @@ Based on remaining impact:
 2. **Fix bookshelf data pointer** ([#164](https://github.com/Mezeporta/Erupe/issues/164)) — corrupts saves for three game versions (needs save data validation)
 3. **Fix achievement rank-up notifications** ([#165](https://github.com/Mezeporta/Erupe/issues/165)) — needs protocol research on `MhfDisplayedAchievement`
 4. ~~**Add coverage threshold** to CI~~ — **Done.** 50% floor enforced via `go tool cover` in CI; Codecov removed.
-5. **Fix guild alliance toggle** ([#166](https://github.com/Mezeporta/Erupe/issues/166)) — needs research into where the setting originates
+5. ~~**Fix guild alliance toggle** ([#166](https://github.com/Mezeporta/Erupe/issues/166))~~ — **Done.** `recruiting` column + `OperateJoint` allow/deny actions + DB toggle
 6. **Fix session handler retail mismatches** ([#167](https://github.com/Mezeporta/Erupe/issues/167)) — log key off-by-one, version boundary, player count
 7. **Reverse-engineer MhfAddUdPoint fields** ([#168](https://github.com/Mezeporta/Erupe/issues/168)) — needs packet captures

network/mhfpacket/msg_mhf_operate_joint.go

@@ -14,6 +14,8 @@ type OperateJointAction uint8
 const (
 	OPERATE_JOINT_DISBAND = 0x01
 	OPERATE_JOINT_LEAVE   = 0x03
+	OPERATE_JOINT_ALLOW   = 0x06
+	OPERATE_JOINT_DENY    = 0x07
 	OPERATE_JOINT_KICK    = 0x09
 )
 

server/channelserver/handlers_guild_alliance.go

@@ -15,6 +15,7 @@ type GuildAlliance struct {
 	Name         string    `db:"name"`
 	CreatedAt    time.Time `db:"created_at"`
 	TotalMembers uint16
+	Recruiting   bool `db:"recruiting"`
 
 	ParentGuildID uint32 `db:"parent_id"`
 	SubGuild1ID   uint32 `db:"sub1_id"`
@@ -75,6 +76,24 @@ func handleMsgMhfOperateJoint(s *Session, p mhfpacket.MHFPacket) {
 			)
 			doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
 		}
+	case mhfpacket.OPERATE_JOINT_ALLOW:
+		if guild.LeaderCharID == s.charID && alliance.ParentGuildID == guild.ID {
+			if err := s.server.guildRepo.SetAllianceRecruiting(alliance.ID, true); err != nil {
+				s.logger.Error("Failed to allow alliance applications", zap.Error(err))
+			}
+			doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+		} else {
+			doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
+		}
+	case mhfpacket.OPERATE_JOINT_DENY:
+		if guild.LeaderCharID == s.charID && alliance.ParentGuildID == guild.ID {
+			if err := s.server.guildRepo.SetAllianceRecruiting(alliance.ID, false); err != nil {
+				s.logger.Error("Failed to deny alliance applications", zap.Error(err))
+			}
+			doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+		} else {
+			doAckSimpleFail(s, pkt.AckHandle, make([]byte, 4))
+		}
 	case mhfpacket.OPERATE_JOINT_KICK:
 		if alliance.ParentGuild.LeaderCharID == s.charID {
 			kickedGuildID := pkt.Data1.ReadUint32()

server/channelserver/handlers_guild_alliance_test.go

@@ -238,6 +238,126 @@ func TestOperateJoint_Kick_NotOwner(t *testing.T) {
 	}
 }
 
+func TestOperateJoint_Allow_AsOwner(t *testing.T) {
+	server := createMockServer()
+	guildMock := &mockGuildRepo{
+		alliance: &GuildAlliance{
+			ID:            5,
+			ParentGuildID: 10,
+		},
+	}
+	guildMock.guild = &Guild{ID: 10}
+	guildMock.guild.LeaderCharID = 1
+	server.guildRepo = guildMock
+	session := createMockSession(1, server)
+
+	pkt := &mhfpacket.MsgMhfOperateJoint{
+		AckHandle:  100,
+		AllianceID: 5,
+		GuildID:    10,
+		Action:     mhfpacket.OPERATE_JOINT_ALLOW,
+	}
+
+	handleMsgMhfOperateJoint(session, pkt)
+
+	if guildMock.allianceRecruitingSet == nil || !*guildMock.allianceRecruitingSet {
+		t.Error("SetAllianceRecruiting should be called with true")
+	}
+
+	select {
+	case <-session.sendPackets:
+	default:
+		t.Error("No response packet queued")
+	}
+}
+
+func TestOperateJoint_Allow_NotOwner(t *testing.T) {
+	server := createMockServer()
+	guildMock := &mockGuildRepo{
+		alliance: &GuildAlliance{
+			ID:            5,
+			ParentGuildID: 99, // different guild
+		},
+	}
+	guildMock.guild = &Guild{ID: 10}
+	guildMock.guild.LeaderCharID = 1
+	server.guildRepo = guildMock
+	session := createMockSession(1, server)
+
+	pkt := &mhfpacket.MsgMhfOperateJoint{
+		AckHandle:  100,
+		AllianceID: 5,
+		GuildID:    10,
+		Action:     mhfpacket.OPERATE_JOINT_ALLOW,
+	}
+
+	handleMsgMhfOperateJoint(session, pkt)
+
+	if guildMock.allianceRecruitingSet != nil {
+		t.Error("Non-owner should not toggle alliance recruiting")
+	}
+}
+
+func TestOperateJoint_Deny_AsOwner(t *testing.T) {
+	server := createMockServer()
+	guildMock := &mockGuildRepo{
+		alliance: &GuildAlliance{
+			ID:            5,
+			ParentGuildID: 10,
+		},
+	}
+	guildMock.guild = &Guild{ID: 10}
+	guildMock.guild.LeaderCharID = 1
+	server.guildRepo = guildMock
+	session := createMockSession(1, server)
+
+	pkt := &mhfpacket.MsgMhfOperateJoint{
+		AckHandle:  100,
+		AllianceID: 5,
+		GuildID:    10,
+		Action:     mhfpacket.OPERATE_JOINT_DENY,
+	}
+
+	handleMsgMhfOperateJoint(session, pkt)
+
+	if guildMock.allianceRecruitingSet == nil || *guildMock.allianceRecruitingSet {
+		t.Error("SetAllianceRecruiting should be called with false")
+	}
+
+	select {
+	case <-session.sendPackets:
+	default:
+		t.Error("No response packet queued")
+	}
+}
+
+func TestOperateJoint_Deny_NotOwner(t *testing.T) {
+	server := createMockServer()
+	guildMock := &mockGuildRepo{
+		alliance: &GuildAlliance{
+			ID:            5,
+			ParentGuildID: 99,
+		},
+	}
+	guildMock.guild = &Guild{ID: 10}
+	guildMock.guild.LeaderCharID = 1
+	server.guildRepo = guildMock
+	session := createMockSession(1, server)
+
+	pkt := &mhfpacket.MsgMhfOperateJoint{
+		AckHandle:  100,
+		AllianceID: 5,
+		GuildID:    10,
+		Action:     mhfpacket.OPERATE_JOINT_DENY,
+	}
+
+	handleMsgMhfOperateJoint(session, pkt)
+
+	if guildMock.allianceRecruitingSet != nil {
+		t.Error("Non-owner should not toggle alliance recruiting")
+	}
+}
+
 // --- handleMsgMhfInfoJoint tests ---
 
 func TestInfoJoint_Success(t *testing.T) {

server/channelserver/handlers_guild_info.go

@@ -440,7 +440,7 @@ func handleMsgMhfEnumerateGuild(s *Session, p mhfpacket.MHFPacket) {
 			ps.Uint8(bf, alliance.Name, true)
 			ps.Uint8(bf, alliance.ParentGuild.LeaderName, true)
 			bf.WriteUint8(0x01) // Unk
-			bf.WriteBool(true)  // TODO: Enable GuildAlliance applications
+			bf.WriteBool(!alliance.Recruiting)
 		}
 	} else {
 		hasNextPage := false

server/channelserver/repo_guild_alliance.go

@@ -11,6 +11,7 @@ SELECT
 ga.id,
 ga.name,
 created_at,
+ga.recruiting,
 parent_id,
 CASE
 	WHEN sub1_id IS NULL THEN 0
@@ -79,6 +80,12 @@ func (r *GuildRepository) RemoveGuildFromAlliance(allianceID, guildID, subGuild1
 	return err
 }
 
+// SetAllianceRecruiting updates whether an alliance is accepting applications.
+func (r *GuildRepository) SetAllianceRecruiting(allianceID uint32, recruiting bool) error {
+	_, err := r.db.Exec("UPDATE guild_alliances SET recruiting=$1 WHERE id=$2", recruiting, allianceID)
+	return err
+}
+
 // scanAllianceWithGuilds scans an alliance row and populates its guild data.
 func (r *GuildRepository) scanAllianceWithGuilds(rows *sqlx.Rows) (*GuildAlliance, error) {
 	alliance := &GuildAlliance{}

server/channelserver/repo_interfaces.go

@@ -87,6 +87,7 @@ type GuildRepo interface {
 	CreateAlliance(name string, parentGuildID uint32) error
 	DeleteAlliance(allianceID uint32) error
 	RemoveGuildFromAlliance(allianceID, guildID, subGuild1ID, subGuild2ID uint32) error
+	SetAllianceRecruiting(allianceID uint32, recruiting bool) error
 	ListAdventures(guildID uint32) ([]*GuildAdventure, error)
 	CreateAdventure(guildID, destination uint32, depart, returnTime int64) error
 	CreateAdventureWithCharge(guildID, destination, charge uint32, depart, returnTime int64) error

server/channelserver/repo_mocks_test.go

@@ -309,8 +309,10 @@ type mockGuildRepo struct {
 	createAllianceErr      error
 	deleteAllianceErr      error
 	removeAllyErr          error
+	setAllianceRecruitErr  error
 	deletedAllianceID      uint32
 	removedAllyArgs        []uint32
+	allianceRecruitingSet  *bool
 
 	// Cooking
 	meals         []*GuildMeal
@@ -454,6 +456,11 @@ func (m *mockGuildRepo) DeleteAlliance(id uint32) error {
 	return m.deleteAllianceErr
 }
 
+func (m *mockGuildRepo) SetAllianceRecruiting(_ uint32, recruiting bool) error {
+	m.allianceRecruitingSet = &recruiting
+	return m.setAllianceRecruitErr
+}
+
 func (m *mockGuildRepo) RemoveGuildFromAlliance(allyID, guildID, sub1, sub2 uint32) error {
 	m.removedAllyArgs = []uint32{allyID, guildID, sub1, sub2}
 	return m.removeAllyErr

server/migrations/sql/0004_alliance_recruiting.sql

@@ -0,0 +1 @@
+ALTER TABLE public.guild_alliances ADD COLUMN recruiting boolean NOT NULL DEFAULT true;