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arikawa/state/store.go

76 lines
2.4 KiB
Go

package state
import (
"errors"
"github.com/diamondburned/arikawa/discord"
)
// Store is the state storage. It should handle mutex itself, and it should only
// concern itself with the local state.
type Store interface {
StoreGetter
StoreModifier
}
// All methods in StoreGetter will be wrapped by the State. If the State can't
// find anything in the storage, it will call the API itself and automatically
// add what's missing into the storage.
type StoreGetter interface {
Self() (*discord.User, error)
Channel(id discord.Snowflake) (*discord.Channel, error)
Channels(guildID discord.Snowflake) ([]discord.Channel, error)
PrivateChannels() ([]discord.Channel, error)
Emoji(guildID, emojiID discord.Snowflake) (*discord.Emoji, error)
Emojis(guildID discord.Snowflake) ([]discord.Emoji, error)
Guild(id discord.Snowflake) (*discord.Guild, error)
Guilds() ([]discord.Guild, error)
Member(guildID, userID discord.Snowflake) (*discord.Member, error)
Members(guildID discord.Snowflake) ([]discord.Member, error)
Message(channelID, messageID discord.Snowflake) (*discord.Message, error)
Messages(channelID discord.Snowflake) ([]discord.Message, error)
Presence(guildID, userID discord.Snowflake) (*discord.Presence, error)
Presences(guildID discord.Snowflake) ([]discord.Presence, error)
Role(guildID, roleID discord.Snowflake) (*discord.Role, error)
Roles(guildID discord.Snowflake) ([]discord.Role, error)
}
type StoreModifier interface {
SelfSet(me *discord.User) error
ChannelSet(*discord.Channel) error
ChannelRemove(*discord.Channel) error
EmojiSet(guildID discord.Snowflake, emojis []discord.Emoji) error
GuildSet(*discord.Guild) error
GuildRemove(*discord.Guild) error
MemberSet(guildID discord.Snowflake, member *discord.Member) error
MemberRemove(guildID, userID discord.Snowflake) error
MessageSet(*discord.Message) error
MessageRemove(*discord.Message) error
PresenceSet(guildID discord.Snowflake, presence *discord.Presence) error
PresenceRemove(guildID, userID discord.Snowflake) error
RoleSet(guildID discord.Snowflake, role *discord.Role) error
RoleRemove(guildID, roleID discord.Snowflake) error
// This should reset all the state to zero/null.
Reset() error
}
// ErrStoreNotFound is an error that a store can use to return when something
// isn't in the storage. There is no strict restrictions on what uses this (the
// default one does, though), so be advised.
var ErrStoreNotFound = errors.New("item not found in store")