Proposal: Special ChatID type to describe Recipient only by its integer ID

[demget]

Something like ChatID helper type which is actually int64 that implements Recipient interface and returns itself. It would make work with specific chat IDs much easier.

Before:

type Config struct {
    AdminGroupID int64
}

b.Send(&tb.Chat{ID: conf.AdminGroupID}, "message")

After:

type Config struct {
    AdminGroup tb.ChatID
}

b.Send(conf.AdminGroup, "message")

[demget]

Just implemented it in 183d648.

The possible problem is that you can't represent a string username as a recipient. But on the other hand, ChatID type is about ID, not Name.

// ChatID represents a chat or an user integer ID, which can be used
// as recipient in bot methods. It is very useful in cases where
// you have special group IDs, for example in your config, and don't
// want to wrap it into *tb.Chat every time you send messages.
//
// Example:
//
//		group := tb.ChatID(-100756389456)
//		b.Send(group, "Hello!")
//
//		type Config struct {
//			AdminGroup tb.ChatID `json:"admin_group"`
//		}
//		b.Send(conf.AdminGroup, "Hello!")
//
type ChatID int64

// Recipient returns chat ID (see Recipient interface).
func (i ChatID) Recipient() string {
	return strconv.FormatInt(int64(i), 10)
}