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/peers/broadcast_test.go

@@ -0,0 +1,99 @@
+package peers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func getTestBroadcast() *tg.Channel {
+	testChannel := getTestChannel()
+	testChannel.ID *= 3
+	testChannel.Broadcast = true
+	testChannel.Megagroup = false
+	return testChannel
+}
+
+func TestBroadcast_SetDiscussionGroup(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	mock, m := testManager(t)
+
+	b := m.Channel(getTestSuperGroup())
+
+	s, ok := m.Channel(getTestBroadcast()).ToBroadcast()
+	a.True(ok)
+
+	mock.ExpectCall(&tg.ChannelsSetDiscussionGroupRequest{
+		Broadcast: s.InputChannel(),
+		Group:     b.InputChannel(),
+	}).ThenRPCErr(getTestError())
+	a.Error(s.SetDiscussionGroup(ctx, b.InputChannel()))
+
+	mock.ExpectCall(&tg.ChannelsSetDiscussionGroupRequest{
+		Broadcast: s.InputChannel(),
+		Group:     b.InputChannel(),
+	}).ThenTrue()
+	a.NoError(s.SetDiscussionGroup(ctx, b.InputChannel()))
+}
+
+func TestBroadcast_ToggleSignatures(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	mock, m := testManager(t)
+
+	ch := m.Channel(getTestBroadcast())
+
+	s, ok := ch.ToBroadcast()
+	a.True(ok)
+
+	mock.ExpectCall(&tg.ChannelsToggleSignaturesRequest{
+		Channel:           s.InputChannel(),
+		SignaturesEnabled: true,
+	}).ThenRPCErr(getTestError())
+	a.Error(s.ToggleSignatures(ctx, true))
+
+	mock.ExpectCall(&tg.ChannelsToggleSignaturesRequest{
+		Channel:           s.InputChannel(),
+		SignaturesEnabled: true,
+	}).ThenResult(&tg.Updates{})
+	a.NoError(s.ToggleSignatures(ctx, true))
+}
+
+func TestBroadcast_DiscussionGroup(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	mock, m := testManager(t)
+
+	linkedChat := getTestChat()
+	linkedSupergroup := getTestSuperGroup()
+	linkedChat.SetMigratedTo(linkedSupergroup.AsInput())
+	ch := m.Channel(getTestBroadcast())
+
+	s, ok := ch.ToBroadcast()
+	a.True(ok)
+
+	mock.ExpectCall(&tg.ChannelsGetFullChannelRequest{
+		Channel: s.InputChannel(),
+	}).ThenRPCErr(getTestError())
+	_, ok, err := s.DiscussionGroup(ctx)
+	a.False(ok)
+	a.Error(err)
+
+	full := getTestChannelFull()
+	full.SetLinkedChatID(linkedChat.ID)
+
+	mock.ExpectCall(&tg.ChannelsGetFullChannelRequest{
+		Channel: s.InputChannel(),
+	}).ThenResult(&tg.MessagesChatFull{
+		FullChat: full,
+		Chats:    []tg.ChatClass{linkedChat, linkedSupergroup},
+	})
+	d, ok, err := s.DiscussionGroup(ctx)
+	a.True(ok)
+	a.NoError(err)
+	a.Equal(linkedSupergroup.ID, d.ID())
+}