move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/message/typing.go

@@ -0,0 +1,63 @@
+package message
+
+import (
+	"context"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+// TypingActionBuilder is a helper to create and send typing actions.
+//
+// See https://core.telegram.org/method/messages.setTyping.
+//
+// See https://core.telegram.org/type/SendMessageAction.
+type TypingActionBuilder struct {
+	sender   *Sender
+	peer     peerPromise
+	topMsgID int
+}
+
+// ThreadID sets thread ID to send.
+func (b *TypingActionBuilder) ThreadID(id int) *TypingActionBuilder {
+	b.topMsgID = id
+	return b
+}
+
+// ThreadMsg sets message's ID as thread ID to send.
+func (b *TypingActionBuilder) ThreadMsg(msg tg.MessageClass) *TypingActionBuilder {
+	return b.ThreadID(msg.GetID())
+}
+
+func (b *TypingActionBuilder) send(ctx context.Context, action tg.SendMessageActionClass) error {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return errors.Wrap(err, "peer")
+	}
+
+	if err := b.sender.setTyping(ctx, &tg.MessagesSetTypingRequest{
+		Peer:     p,
+		TopMsgID: b.topMsgID,
+		Action:   action,
+	}); err != nil {
+		return errors.Wrap(err, "set typing")
+	}
+
+	return nil
+}
+
+// Custom sends given action.
+func (b *TypingActionBuilder) Custom(ctx context.Context, action tg.SendMessageActionClass) error {
+	return b.send(ctx, action)
+}
+
+//go:generate go run go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/internal/mktyping -output typing.gen.go
+
+// TypingAction creates TypingActionBuilder.
+func (b *RequestBuilder) TypingAction() *TypingActionBuilder {
+	return &TypingActionBuilder{
+		sender: b.sender,
+		peer:   b.peer,
+	}
+}