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/tg/tl_updates_classifier_gen.go

@@ -0,0 +1,148 @@
+// Code generated by gotdgen, DO NOT EDIT.
+
+package tg
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+
+	"go.uber.org/multierr"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tdjson"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tdp"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgerr"
+)
+
+// No-op definition for keeping imports.
+var (
+	_ = bin.Buffer{}
+	_ = context.Background()
+	_ = fmt.Stringer(nil)
+	_ = strings.Builder{}
+	_ = errors.Is
+	_ = multierr.AppendInto
+	_ = sort.Ints
+	_ = tdp.Format
+	_ = tgerr.Error{}
+	_ = tdjson.Encoder{}
+)
+
+func IsPtsUpdate(u UpdateClass) (pts, ptsCount int, ok bool) {
+	switch u := u.(type) {
+	case *UpdateNewMessage:
+		return u.Pts, u.PtsCount, true
+	case *UpdateDeleteMessages:
+		return u.Pts, u.PtsCount, true
+	case *UpdateReadHistoryInbox:
+		return u.Pts, u.PtsCount, true
+	case *UpdateReadHistoryOutbox:
+		return u.Pts, u.PtsCount, true
+	case *UpdateWebPage:
+		return u.Pts, u.PtsCount, true
+	case *UpdateReadMessagesContents:
+		return u.Pts, u.PtsCount, true
+	case *UpdateEditMessage:
+		return u.Pts, u.PtsCount, true
+	case *UpdateFolderPeers:
+		return u.Pts, u.PtsCount, true
+	case *UpdatePinnedMessages:
+		return u.Pts, u.PtsCount, true
+	}
+
+	return
+}
+
+func IsQtsUpdate(u UpdateClass) (qts int, ok bool) {
+	switch u := u.(type) {
+	case *UpdateNewEncryptedMessage:
+		return u.Qts, true
+	case *UpdateMessagePollVote:
+		return u.Qts, true
+	case *UpdateChatParticipant:
+		return u.Qts, true
+	case *UpdateChannelParticipant:
+		return u.Qts, true
+	case *UpdateBotStopped:
+		return u.Qts, true
+	case *UpdateBotChatInviteRequester:
+		return u.Qts, true
+	case *UpdateBotChatBoost:
+		return u.Qts, true
+	case *UpdateBotMessageReaction:
+		return u.Qts, true
+	case *UpdateBotMessageReactions:
+		return u.Qts, true
+	case *UpdateBotBusinessConnect:
+		return u.Qts, true
+	case *UpdateBotNewBusinessMessage:
+		return u.Qts, true
+	case *UpdateBotEditBusinessMessage:
+		return u.Qts, true
+	case *UpdateBotDeleteBusinessMessage:
+		return u.Qts, true
+	case *UpdateBotPurchasedPaidMedia:
+		return u.Qts, true
+	}
+
+	return
+}
+
+func IsChannelPtsUpdate(u UpdateClass) (channelID int64, pts, ptsCount int, ok bool, err error) {
+	switch u := u.(type) {
+	case *UpdateChannelTooLong:
+		return u.ChannelID, u.Pts, 0, true, nil
+	case *UpdateNewChannelMessage:
+		channelID, err = extractChannelID(u.Message)
+		return channelID, u.Pts, u.PtsCount, true, err
+	case *UpdateReadChannelInbox:
+		return u.ChannelID, u.Pts, 0, true, nil
+	case *UpdateDeleteChannelMessages:
+		return u.ChannelID, u.Pts, u.PtsCount, true, nil
+	case *UpdateEditChannelMessage:
+		channelID, err = extractChannelID(u.Message)
+		return channelID, u.Pts, u.PtsCount, true, err
+	case *UpdateChannelWebPage:
+		return u.ChannelID, u.Pts, u.PtsCount, true, nil
+	case *UpdatePinnedChannelMessages:
+		return u.ChannelID, u.Pts, u.PtsCount, true, nil
+	}
+
+	return
+}
+
+func extractChannelID(msg MessageClass) (int64, error) {
+	switch msg := msg.(type) {
+	case *MessageEmpty:
+		peer, ok := msg.GetPeerID()
+		if !ok {
+			return 0, errors.New("MessageEmpty have no peerID field")
+		}
+		if c, ok := peer.(*PeerChannel); ok {
+			return c.ChannelID, nil
+		}
+
+		return 0, errors.New("unexpected peer type")
+	case *Message:
+		peer := msg.PeerID
+
+		if c, ok := peer.(*PeerChannel); ok {
+			return c.ChannelID, nil
+		}
+
+		return 0, errors.New("unexpected peer type")
+	case *MessageService:
+		peer := msg.PeerID
+
+		if c, ok := peer.(*PeerChannel); ok {
+			return c.ChannelID, nil
+		}
+
+		return 0, errors.New("unexpected peer type")
+	default:
+		return 0, errors.New("unexpected MessageClass type")
+	}
+}