package arguments import ( "errors" "regexp" "github.com/diamondburned/arikawa/discord" ) // (empty) so it matches standard links // | OR // canary. matches canary MessageURL // 3 `(\d+)` for guild ID, channel ID and message ID var Regex = regexp.MustCompile( `https://(ptb\.|canary\.)?discord(?:app)?\.com/channels/(\d+)/(\d+)/(\d+)`, ) // MessageURL contains info from a MessageURL type MessageURL struct { GuildID discord.Snowflake ChannelID discord.Snowflake MessageID discord.Snowflake } func (url *MessageURL) Parse(arg string) error { u := ParseMessageURL(arg) if u == nil { return errors.New("Invalid MessageURL format.") } *url = *u return nil } func (url *MessageURL) Usage() string { return "https\u200b://discordapp.com/channels/\\*/\\*/\\*" } // ParseMessageURL parses the MessageURL into a smartlink func ParseMessageURL(url string) *MessageURL { ss := Regex.FindAllStringSubmatch(url, -1) if ss == nil { return nil } if len(ss) == 0 || len(ss[0]) != 5 { return nil } gID, err1 := discord.ParseSnowflake(ss[0][2]) cID, err2 := discord.ParseSnowflake(ss[0][3]) mID, err3 := discord.ParseSnowflake(ss[0][4]) if err1 != nil || err2 != nil || err3 != nil { return nil } return &MessageURL{ GuildID: gID, ChannelID: cID, MessageID: mID, } }