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arikawa/state/store/defaultstore/presence.go
diamondburned c6679dc52c State: Separate Store into smaller interfaces, Cabinet API
This commit refactors the Store interface in State into smaller
interfaces in package store. These interfaces are combined into one
structure called a "Cabinet". The default implementation of those
interfaces have been rewritten in package defaultstore, while the old
no-op implementation stays with the store package.

This commit also omitted several state handlers for user events, as it
is unclear what they are actually structured like.
2020-11-29 16:57:58 -08:00

107 lines
2 KiB
Go

package defaultstore
import (
"sync"
"github.com/diamondburned/arikawa/v2/discord"
"github.com/diamondburned/arikawa/v2/gateway"
"github.com/diamondburned/arikawa/v2/internal/moreatomic"
"github.com/diamondburned/arikawa/v2/state/store"
)
type Presence struct {
guilds moreatomic.Map
}
type presences struct {
mut sync.Mutex
presences map[discord.UserID]gateway.Presence
}
var _ store.PresenceStore = (*Presence)(nil)
func NewPresence() *Presence {
return &Presence{
guilds: *moreatomic.NewMap(func() interface{} {
return &presences{
presences: make(map[discord.UserID]gateway.Presence, 1),
}
}),
}
}
func (s *Presence) Reset() error {
return s.guilds.Reset()
}
func (s *Presence) Presence(gID discord.GuildID, uID discord.UserID) (*gateway.Presence, error) {
iv, ok := s.guilds.Load(gID)
if !ok {
return nil, store.ErrNotFound
}
ps := iv.(*presences)
ps.mut.Lock()
defer ps.mut.Unlock()
p, ok := ps.presences[uID]
if ok {
return &p, nil
}
return nil, store.ErrNotFound
}
func (s *Presence) Presences(guildID discord.GuildID) ([]gateway.Presence, error) {
iv, ok := s.guilds.Load(guildID)
if !ok {
return nil, store.ErrNotFound
}
ps := iv.(*presences)
ps.mut.Lock()
defer ps.mut.Unlock()
var presences = make([]gateway.Presence, 0, len(ps.presences))
for _, p := range ps.presences {
presences = append(presences, p)
}
return presences, nil
}
func (s *Presence) PresenceSet(guildID discord.GuildID, presence gateway.Presence) error {
iv, _ := s.guilds.LoadOrStore(guildID)
ps := iv.(*presences)
ps.mut.Lock()
defer ps.mut.Unlock()
// Shitty if check is better than a realloc every time.
if ps.presences == nil {
ps.presences = make(map[discord.UserID]gateway.Presence, 1)
}
ps.presences[presence.User.ID] = presence
return nil
}
func (s *Presence) PresenceRemove(guildID discord.GuildID, userID discord.UserID) error {
iv, ok := s.guilds.Load(guildID)
if !ok {
return nil
}
ps := iv.(*presences)
ps.mut.Lock()
delete(ps.presences, userID)
ps.mut.Unlock()
return nil
}