Added Target interface and target types

channel.go

@@ -0,0 +1,66 @@
+package irc
+
+import "git.aiterp.net/gisle/irc/list"
+
+// A Channel is a target that manages the userlist
+type Channel struct {
+	name     string
+	userlist list.List
+}
+
+// Kind returns "channel"
+func (channel *Channel) Kind() string {
+	return "channel"
+}
+
+// Name gets the channel name
+func (channel *Channel) Name() string {
+	return channel.name
+}
+
+// UserList gets the channel userlist
+func (channel *Channel) UserList() list.Immutable {
+	return channel.userlist.Immutable()
+}
+
+// Handle handles messages routed to this channel by the client's event loop
+func (channel *Channel) Handle(event *Event, client *Client) {
+	switch event.Name() {
+	case "packet.join":
+		{
+			// Support extended-join
+			account := ""
+			if accountArg := event.Arg(1); accountArg != "" && accountArg != "*" {
+				account = accountArg
+			}
+
+			channel.userlist.Insert(list.User{
+				Nick:    event.Nick,
+				User:    event.User,
+				Host:    event.Host,
+				Account: account,
+			})
+		}
+	case "packet.part", "packet.quit":
+		{
+			channel.userlist.Remove(event.Nick)
+		}
+	case "packet.account":
+		{
+			newAccount := event.Arg(0)
+
+			if newAccount != "*" && newAccount != "" {
+				channel.userlist.Patch(event.Nick, list.UserPatch{Account: newAccount})
+			} else {
+				channel.userlist.Patch(event.Nick, list.UserPatch{ClearAccount: true})
+			}
+		}
+	case "packet.chghost":
+		{
+			newUser := event.Arg(0)
+			newHost := event.Arg(1)
+
+			channel.userlist.Patch(event.Nick, list.UserPatch{User: newUser, Host: newHost})
+		}
+	}
+}

client.go

@@ -17,7 +17,6 @@ import (
 	"time"
 
 	"git.aiterp.net/gisle/irc/ircutil"
-
 	"git.aiterp.net/gisle/irc/isupport"
 )
 
@@ -26,12 +25,31 @@ var supportedCaps = []string{
 	"cap-notify",
 	"multi-prefix",
 	"userhost-in-names",
+	"account-notify",
+	"extended-join",
+	"chghost",
 }
 
 // ErrNoConnection is returned if you try to do something requiring a connection,
 // but there is none.
 var ErrNoConnection = errors.New("irc: no connection")
 
+// ErrTargetAlreadyAdded is returned by Client.AddTarget if that target has already been
+// added to the client.
+var ErrTargetAlreadyAdded = errors.New("irc: target already added")
+
+// ErrTargetConflict is returned by Clinet.AddTarget if there already exists a target
+// matching the name and kind.
+var ErrTargetConflict = errors.New("irc: target name and kind match existing target")
+
+// ErrTargetNotFound is returned by Clinet.RemoveTarget if the target is not part of
+// the client's target list
+var ErrTargetNotFound = errors.New("irc: target not found")
+
+// ErrTargetIsStatus is returned by Clinet.RemoveTarget if the target is the client's
+// status target
+var ErrTargetIsStatus = errors.New("irc: cannot remove status target")
+
 // A Client is an IRC client. You need to use New to construct it
 type Client struct {
 	id     string
@@ -57,6 +75,10 @@ type Client struct {
 	quit     bool
 	isupport isupport.ISupport
 	values   map[string]interface{}
+
+	status    *Status
+	targets   []Target
+	targteIds map[Target]string
 }
 
 // New creates a new client. The context can be context.Background if you want manually to
@@ -70,8 +92,12 @@ func New(ctx context.Context, config Config) *Client {
 		capEnabled: make(map[string]bool),
 		capData:    make(map[string]string),
 		config:     config.WithDefaults(),
+		targteIds:  make(map[Target]string, 16),
+		status:     &Status{},
 	}
 
+	client.AddTarget(client.status)
+
 	client.ctx, client.cancel = context.WithCancel(ctx)
 
 	go client.handleEventLoop()
@@ -366,6 +392,77 @@ func (client *Client) Join(channels ...string) error {
 	return client.Sendf("JOIN %s", strings.Join(channels, ","))
 }
 
+// Target gets a target by kind and name
+func (client *Client) Target(kind string, name string) Target {
+	client.mutex.RLock()
+	defer client.mutex.RUnlock()
+
+	for _, target := range client.targets {
+		if target.Kind() == kind && target.Name() == name {
+			return target
+		}
+	}
+
+	return nil
+}
+
+// Channel is a shorthand for getting a channel target and type asserting it.
+func (client *Client) Channel(name string) *Channel {
+	target := client.Target("channel", name)
+	if target == nil {
+		return nil
+	}
+
+	return target.(*Channel)
+}
+
+// AddTarget adds a target to the client, generating a unique ID for it.
+func (client *Client) AddTarget(target Target) (id string, err error) {
+	client.mutex.Lock()
+	defer client.mutex.Unlock()
+
+	for i := range client.targets {
+		if target == client.targets[i] {
+			err = ErrTargetAlreadyAdded
+			return
+		} else if target.Kind() == client.targets[i].Kind() && target.Name() == client.targets[i].Name() {
+			err = ErrTargetConflict
+			return
+		}
+	}
+
+	id = generateClientID()
+	client.targets = append(client.targets, target)
+	client.targteIds[target] = id
+
+	return
+}
+
+// RemoveTarget removes a target to the client
+func (client *Client) RemoveTarget(target Target) (id string, err error) {
+	if target == client.status {
+		return "", ErrTargetIsStatus
+	}
+
+	client.mutex.Lock()
+	defer client.mutex.Unlock()
+
+	for i := range client.targets {
+		if target == client.targets[i] {
+			id = client.targteIds[target]
+
+			client.targets[i] = client.targets[len(client.targets)-1]
+			client.targets = client.targets[:len(client.targets)-1]
+			delete(client.targteIds, target)
+
+			return
+		}
+	}
+
+	err = ErrTargetNotFound
+	return
+}
+
 func (client *Client) handleEventLoop() {
 	ticker := time.NewTicker(time.Second * 30)
 
@@ -532,6 +629,15 @@ func (client *Client) handleEvent(event *Event) {
 			}
 		}
 
+	case "packer.nick":
+		{
+			client.handleInTargets(event.Nick, event)
+
+			if event.Nick == client.nick {
+				client.SetValue("nick", event.Arg(0))
+			}
+		}
+
 	// Handle ISupport
 	case "packet.005":
 		{
@@ -678,10 +784,92 @@ func (client *Client) handleEvent(event *Event) {
 				client.host = event.Args[2]
 				client.mutex.Unlock()
 			}
+
+			// This may be relevant in channels where the client resides.
+			client.handleInTargets(event.Nick, event)
+		}
+
+	// Join/part handling
+	case "packet.join":
+		{
+			var channel *Channel
+
+			if event.Nick == client.nick {
+				channel = &Channel{name: event.Arg(0)}
+				client.AddTarget(channel)
+			} else {
+				channel = client.Channel(event.Arg(0))
+			}
+
+			event.targets = append(event.targets, channel)
+
+			if channel != nil {
+				channel.Handle(event, client)
+			}
+		}
+
+	case "packet.part":
+		{
+			channel := client.Channel(event.Arg(0))
+			if channel == nil {
+				break
+			}
+
+			channel.Handle(event, client)
+
+			if event.Nick == client.nick {
+				client.RemoveTarget(channel)
+			} else {
+				event.targets = append(event.targets, channel)
+			}
+		}
+
+	case "packet.quit":
+		{
+			client.handleInTargets(event.Nick, event)
+		}
+
+	// Account handling
+	case "packet.account":
+		{
+			client.handleInTargets(event.Nick, event)
 		}
 	}
 }
 
+func (client *Client) handleInTargets(nick string, event *Event) {
+	client.mutex.RLock()
+	for i := range client.targets {
+		switch target := client.targets[i].(type) {
+		case *Channel:
+			{
+				if nick != "" {
+					if _, ok := target.UserList().User(event.Nick); !ok {
+						continue
+					}
+				}
+
+				event.targets = append(event.targets, target)
+
+				target.Handle(event, client)
+			}
+		case *Query:
+			{
+				if target.user.Nick == nick {
+					target.Handle(event, client)
+				}
+			}
+		case *Status:
+			{
+				if client.nick == event.Nick {
+					target.Handle(event, client)
+				}
+			}
+		}
+	}
+	client.mutex.RUnlock()
+}
+
 func generateClientID() string {
 	bytes := make([]byte, 12)
 	_, err := rand.Read(bytes)
@@ -697,7 +885,7 @@ func generateClientID() string {
 		return result[:24]
 	}
 
-	binary.BigEndian.PutUint32(bytes, uint32(time.Now().Unix()))
+	binary.BigEndian.PutUint32(bytes[4:], uint32(time.Now().Unix()))
 
 	return hex.EncodeToString(bytes)
 }

event.go

@@ -25,6 +25,8 @@ type Event struct {
 	cancel context.CancelFunc
 	killed bool
 	hidden bool
+
+	targets []Target
 }
 
 // NewEvent makes a new event with Kind, Verb, Time set and Args and Tags initialized.
@@ -102,6 +104,20 @@ func (event *Event) Hidden() bool {
 	return event.hidden
 }
 
+// Arg gets the argument by index. The rationale behind it is that some
+// servers may use it for the last argument in JOINs and such.
+func (event *Event) Arg(index int) string {
+	if index < 0 || index > len(event.Args) {
+		return ""
+	}
+
+	if index == len(event.Args) {
+		return event.Text
+	}
+
+	return event.Args[index]
+}
+
 // MarshalJSON makes a JSON object from the event.
 func (event *Event) MarshalJSON() ([]byte, error) {
 	return json.Marshal(map[string]interface{}{

list/list.go

@@ -242,6 +242,32 @@ func (list *List) Users() []User {
 	return result
 }
 
+// Patch allows editing a limited subset of the user's properties.
+func (list *List) Patch(nick string, patch UserPatch) (ok bool) {
+	list.mutex.Lock()
+	defer list.mutex.Unlock()
+
+	for _, user := range list.users {
+		if strings.EqualFold(nick, user.Nick) {
+			if patch.Account != "" || patch.ClearAccount {
+				user.Account = patch.Account
+			}
+
+			if patch.User != "" {
+				user.User = patch.User
+			}
+
+			if patch.Host != "" {
+				user.Host = patch.Host
+			}
+
+			return true
+		}
+	}
+
+	return false
+}
+
 // SetAutoSort enables or disables automatic sorting, which by default is enabled.
 // Dislabing it makes sense when doing a massive operation. Enabling it will trigger
 // a sort.
@@ -264,6 +290,11 @@ func (list *List) Clear() {
 	list.mutex.Unlock()
 }
 
+// Immutable gets an immutable version of the list.
+func (list *List) Immutable() Immutable {
+	return Immutable{list: list}
+}
+
 func (list *List) sort() {
 	sort.Slice(list.users, func(i, j int) bool {
 		a := list.users[i]

list/user.go

@@ -11,6 +11,14 @@ type User struct {
 	PrefixedNick string `json:"prefixedNick"`
 }
 
+// UserPatch is used in List.Patch to apply changes to a user
+type UserPatch struct {
+	User         string
+	Host         string
+	Account      string
+	ClearAccount bool
+}
+
 // HighestMode returns the highest mode.
 func (user *User) HighestMode() rune {
 	if len(user.Modes) == 0 {

query.go

@@ -0,0 +1,44 @@
+package irc
+
+import (
+	"git.aiterp.net/gisle/irc/list"
+)
+
+// A Query is a target for direct messages to and from a specific nick.
+type Query struct {
+	user list.User
+}
+
+// Kind returns "channel"
+func (query *Query) Kind() string {
+	return "query"
+}
+
+// Name gets the query name
+func (query *Query) Name() string {
+	return query.user.Nick
+}
+
+// Handle handles messages routed to this channel by the client's event loop
+func (query *Query) Handle(event *Event, client *Client) {
+	switch event.Name() {
+	case "packet.nick":
+		{
+			query.user.Nick = event.Arg(0)
+		}
+	case "packet.account":
+		{
+			account := ""
+			if accountArg := event.Arg(0); accountArg != "" && accountArg != "*" {
+				account = accountArg
+			}
+
+			query.user.Account = account
+		}
+	case "packet.chghost":
+		{
+			query.user.User = event.Arg(0)
+			query.user.Host = event.Arg(1)
+		}
+	}
+}

status.go

@@ -0,0 +1,20 @@
+package irc
+
+// A Status contains
+type Status struct {
+}
+
+// Kind returns "status"
+func (status *Status) Kind() string {
+	return "status"
+}
+
+// Name returns "status"
+func (status *Status) Name() string {
+	return "Status"
+}
+
+// Handle handles messages routed to this status by the client's event loop
+func (status *Status) Handle(event *Event, client *Client) {
+
+}

target.go

@@ -0,0 +1,9 @@
+package irc
+
+// A Target is a handler for a message meant for a limited part of the client, like a channel or
+// query
+type Target interface {
+	Kind() string
+	Name() string
+	Handle(event *Event, client *Client)
+}