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arikawa/bot/extras/arguments/mention.go

92 lines
1.7 KiB
Go

package arguments
import (
"errors"
"regexp"
"github.com/diamondburned/arikawa/discord"
)
var (
ChannelRegex = regexp.MustCompile(`<#(\d+)>`)
UserRegex = regexp.MustCompile(`<@!?(\d+)>`)
RoleRegex = regexp.MustCompile(`<@&(\d+)>`)
)
//
type ChannelMention discord.Snowflake
func (m *ChannelMention) Parse(arg string) error {
return grabFirst(ChannelRegex, "channel mention", arg, (*discord.Snowflake)(m))
}
func (m *ChannelMention) Usage() string {
return "#channel"
}
func (m *ChannelMention) ID() discord.Snowflake {
return discord.Snowflake(*m)
}
func (m *ChannelMention) Mention() string {
return "<#" + m.ID().String() + ">"
}
//
type UserMention discord.Snowflake
func (m *UserMention) Parse(arg string) error {
return grabFirst(UserRegex, "user mention", arg, (*discord.Snowflake)(m))
}
func (m *UserMention) Usage() string {
return "@user"
}
func (m *UserMention) ID() discord.Snowflake {
return discord.Snowflake(*m)
}
func (m *UserMention) Mention() string {
return "<@" + m.ID().String() + ">"
}
//
type RoleMention discord.Snowflake
func (m *RoleMention) Parse(arg string) error {
return grabFirst(RoleRegex, "role mention", arg, (*discord.Snowflake)(m))
}
func (m *RoleMention) Usage() string {
return "@role"
}
func (m *RoleMention) ID() discord.Snowflake {
return discord.Snowflake(*m)
}
func (m *RoleMention) Mention() string {
return "<@&" + m.ID().String() + ">"
}
//
func grabFirst(reg *regexp.Regexp, item, input string, output *discord.Snowflake) error {
matches := reg.FindStringSubmatch(input)
if len(matches) < 2 {
return errors.New("Invalid " + item)
}
id, err := discord.ParseSnowflake(matches[1])
if err != nil {
return errors.New("Invalid " + item)
}
*output = id
return nil
}