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/query/dialogs/iter_test.go

@@ -0,0 +1,87 @@
+package dialogs
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgmock"
+)
+
+func generateDialogs(count int) []tg.DialogClass {
+	r := make([]tg.DialogClass, 0, count)
+
+	for i := 0; i < count; i++ {
+		r = append(r, &tg.Dialog{
+			Peer: &tg.PeerChannel{ChannelID: int64(i)},
+		})
+	}
+
+	return r
+}
+
+func result(r []tg.DialogClass, count int) tg.MessagesDialogsClass {
+	msgs := make([]tg.MessageClass, 0, len(r))
+	for i, dlg := range r {
+		msgs = append(msgs, &tg.Message{
+			ID:     i,
+			PeerID: dlg.GetPeer(),
+		})
+	}
+
+	chats := make([]tg.ChatClass, 0, len(r))
+	for i, dlg := range r {
+		id := dlg.GetPeer().(*tg.PeerChannel).ChannelID
+		chats = append(chats, &tg.Channel{
+			ID:         id,
+			AccessHash: 10,
+			Photo: &tg.ChatPhoto{
+				PhotoID: int64(i),
+			},
+		})
+	}
+
+	return &tg.MessagesDialogsSlice{
+		Dialogs:  r,
+		Messages: msgs,
+		Chats:    chats,
+		Count:    count,
+	}
+}
+
+func TestIterator(t *testing.T) {
+	ctx := context.Background()
+	mock := tgmock.NewRequire(t)
+	limit := 10
+	totalRows := 3 * limit
+	expected := generateDialogs(totalRows)
+	raw := tg.NewClient(mock)
+
+	mock.Expect().ThenResult(result(expected[0:limit], totalRows))
+	mock.Expect().ThenResult(result(expected[limit:2*limit], totalRows))
+	mock.Expect().ThenResult(result(expected[2*limit:3*limit], totalRows))
+	mock.Expect().ThenResult(result(expected[3*limit:], totalRows))
+
+	iter := NewQueryBuilder(raw).GetDialogs().BatchSize(10).Iter()
+	i := 0
+	for iter.Next(ctx) {
+		require.Equal(t, expected[i].GetPeer(), iter.Value().Dialog.GetPeer())
+		i++
+	}
+	require.NoError(t, iter.Err())
+	require.Equal(t, totalRows, i)
+
+	total, err := iter.Total(ctx)
+	require.NoError(t, err)
+	require.Equal(t, totalRows, total)
+
+	mock.ExpectCall(&tg.MessagesGetDialogsRequest{
+		OffsetPeer: &tg.InputPeerEmpty{},
+		Limit:      1,
+	}).ThenResult(result(expected[:0], totalRows))
+	total, err = iter.FetchTotal(ctx)
+	require.NoError(t, err)
+	require.Equal(t, totalRows, total)
+}