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package channel
import (
"citrons.xyz/talk/proto"
"citrons.xyz/talk/server/object"
"citrons.xyz/talk/server/session"
"citrons.xyz/talk/server/validate"
"citrons.xyz/talk/server/user"
"strings"
"sort"
)
type ChannelStore struct {
world *object.World
byName map[string]*Channel
directChannels map[string]*Channel
}
type Channel struct {
store *ChannelStore
id string
name string
isDirect bool
members map[string]Membership
messages []proto.Object
byId map[string]int
defaultMembership Membership
Stream session.Stream
}
func NewStore(world *object.World) *ChannelStore {
return &ChannelStore {
world, make(map[string]*Channel), make(map[string]*Channel),
}
}
func (cs *ChannelStore) CreateChannel(name string) (*Channel, *proto.Fail) {
if cs.ByName(name) != nil {
return nil, &proto.Fail {
"name-taken", "", map[string]string {"": name},
}
}
if !validate.Name(name) {
return nil, &proto.Fail {
"invalid-name", "", map[string]string {"": name},
}
}
var c Channel
c.store = cs
c.name = name
c.members = make(map[string]Membership)
c.byId = make(map[string]int)
c.defaultMembership = DefaultMembership
cs.byName[validate.Fold(name)] = &c
c.id = cs.world.NewObject(&c)
return &c, nil
}
func (cs *ChannelStore) GetDirect(among []string) *Channel {
sort.Strings(among)
key := strings.Join(among, "\x00")
if cs.directChannels[key] == nil {
var c Channel
c.isDirect = true
c.store = cs
c.byId = make(map[string]int)
c.defaultMembership = DefaultMembership
c.members = make(map[string]Membership)
for _, member := range among {
c.members[member] = c.defaultMembership
}
cs.directChannels[key] = &c
c.id = cs.world.NewObject(&c)
}
return cs.directChannels[key]
}
func (cs *ChannelStore) ByName(name string) *Channel {
return cs.byName[validate.Fold(name)]
}
func (c *Channel) Name() string {
return c.NameFor("")
}
func (c *Channel) NameFor(uid string) string {
if !c.isDirect {
return c.name
} else {
var members []string
for member := range c.members {
if member == uid && len(c.members) > 1 {
continue
}
u := c.store.world.GetObject(member)
if u != nil {
members = append(members, u.InfoFor(uid).Fields[""])
}
}
sort.Strings(members)
return strings.Join(members, ", ")
}
}
func (c *Channel) Id() string {
return c.id
}
func (c *Channel) Rename(name string) *proto.Fail {
if !validate.Name(name) {
return &proto.Fail {
"invalid-name", "", map[string]string {"": name},
}
}
if validate.Fold(name) == validate.Fold(c.name) {
c.name = name
return nil
}
if c.store.ByName(name) != nil {
return &proto.Fail {
"name-taken", "", map[string]string {"": name},
}
}
c.store.byName[validate.Fold(c.name)] = nil
c.store.byName[validate.Fold(name)] = c
c.name = name
return nil
}
func (c *Channel) Put(m proto.Object) proto.Object {
m.Id = proto.GenId()
m.Fields["t"] = proto.Timestamp()
c.byId[m.Id] = len(c.messages)
c.messages = append(c.messages, m)
for s, _ := range c.Stream.Subscribers() {
if m.Fields["f"] == s.UserId {
continue
}
if c.members[s.UserId].See {
s.Event(proto.NewCmd("p", c.id, m))
}
}
return m
}
func (c *Channel) prune() {
if c.isDirect {
return
}
for m, _ := range c.members {
switch c.store.world.GetObject(m).(type) {
case *user.User:
default:
delete(c.members, m)
}
}
}
func (c *Channel) Join(u *user.User) *proto.Fail {
if c.members[u.Id()].Yes {
return nil
}
c.members[u.Id()] = c.defaultMembership
u.Channels[c.id] = true
c.Put(proto.Object{"join", "", map[string]string {"f": u.Id()}})
return nil
}
func (c *Channel) Leave(u *user.User) *proto.Fail {
if !c.members[u.Id()].Yes {
return nil
}
delete(c.members, u.Id())
delete(u.Channels, c.id)
c.Put(proto.Object{"leave", "", map[string]string {"f": u.Id()}})
return nil
}
func (c *Channel) Members() map[string]Membership {
c.prune()
return c.members
}
func (c *Channel) SetMembership(u *user.User, m Membership) {
if c.members[u.Id()].Yes {
c.members[u.Id()] = m
}
}
func (c *Channel) Delete() {
c.Stream.Event(proto.NewCmd("delete", c.id))
c.Stream.UnsubscribeAll()
for m, _ := range c.members {
switch u := c.store.world.GetObject(m).(type) {
case *user.User:
u.Channels[c.id] = false
default:
}
}
delete(c.store.byName, validate.Fold(c.name))
c.store.world.RemoveObject(c.id)
deleted := object.Tombstone {
c.id, map[string]string {"": c.name, "kind": c.Kind()},
}
c.store.world.PutObject(c.id, deleted)
}
func (c *Channel) Kind() string {
switch {
case c.isDirect:
return "direct-channel"
default:
return "channel"
}
}
func (c *Channel) InfoFor(uid string) proto.Object {
return proto.Object {
c.Kind(), c.id, map[string]string {"": c.NameFor(uid)},
}
}
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