owobot/internal/cache/cache.go

114 lines
3.4 KiB
Go

/*
* owobot - Your server's guardian and entertainer
* Copyright (C) 2023 owobot Contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package cache
import (
"errors"
"github.com/bwmarrin/discordgo"
)
// Member gets a discord member from the cache. If it doesn't exist in the cache, it
// gets it from discord and adds it to the cache.
func Member(s *discordgo.Session, guildID, userID string) (*discordgo.Member, error) {
member, err := s.State.Member(guildID, userID)
if errors.Is(err, discordgo.ErrStateNotFound) {
// If the member wasn't found in the state struct,
// get the member from discord and add it.
member, err = s.GuildMember(guildID, userID)
if err != nil {
return nil, err
}
return member, s.State.MemberAdd(member)
} else if err != nil {
return nil, err
}
return member, nil
}
// Role gets a discord role from the cache. If it doesn't exist in the cache, it
// gets it from discord and adds it to the cache.
func Role(s *discordgo.Session, guildID, roleID string) (*discordgo.Role, error) {
role, err := s.State.Role(guildID, roleID)
if errors.Is(err, discordgo.ErrStateNotFound) {
// If the role wasn't found in the state struct,
// get the guild roles from discord and add them.
roles, err := s.GuildRoles(guildID)
if err != nil {
return nil, err
}
for _, role := range roles {
err = s.State.RoleAdd(guildID, role)
if err != nil {
return nil, err
}
}
return s.State.Role(guildID, roleID)
} else if err != nil {
return nil, err
}
return role, nil
}
// Channel gets a discord channel from the cache. If it doesn't exist in the cache, it
// gets it from discord and adds it to the cache.
func Channel(s *discordgo.Session, guildID, channelID string) (*discordgo.Channel, error) {
role, err := s.State.Channel(channelID)
if errors.Is(err, discordgo.ErrStateNotFound) {
// If the role wasn't found in the state struct,
// get the guild roles from discord and add them.
channels, err := s.GuildChannels(guildID)
if err != nil {
return nil, err
}
for _, channel := range channels {
err = s.State.ChannelAdd(channel)
if err != nil {
return nil, err
}
}
return s.State.Channel(channelID)
} else if err != nil {
return nil, err
}
return role, nil
}
// Roles gets a list of roles in a discord guild from the cache. If it doesn't
// exist in the cache, it gets it from discord and adds it to the cache.
func Roles(s *discordgo.Session, guildID string) ([]*discordgo.Role, error) {
guild, err := s.State.Guild(guildID)
if errors.Is(err, discordgo.ErrStateNotFound) {
return s.GuildRoles(guildID)
} else if err != nil {
return nil, err
}
if len(guild.Roles) == 0 {
roles, err := s.GuildRoles(guildID)
if err != nil {
return nil, err
}
guild.Roles = roles
return roles, nil
}
return guild.Roles, nil
}