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/self_test.go

@@ -0,0 +1,45 @@
+package peers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func TestManager_Self(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	mock, m := testManager(t)
+	testUser := getTestSelf()
+
+	_, ok := m.myID()
+	a.False(ok)
+	a.False(m.selfIsBot())
+
+	mock.ExpectCall(&tg.UsersGetUsersRequest{
+		ID: []tg.InputUserClass{&tg.InputUserSelf{}},
+	}).ThenRPCErr(getTestError())
+	u, err := m.Self(ctx)
+	a.Error(err)
+	a.Zero(u)
+
+	mock.ExpectCall(&tg.UsersGetUsersRequest{
+		ID: []tg.InputUserClass{&tg.InputUserSelf{}},
+	}).ThenResult(&tg.UserClassVector{Elems: []tg.UserClass{testUser}})
+	u, err = m.Self(ctx)
+	a.NoError(err)
+	a.Equal(testUser, u.Raw())
+
+	// Test caching.
+	u, err = m.Self(ctx)
+	a.NoError(err)
+	a.Equal(testUser, u.Raw())
+
+	id, ok := m.myID()
+	a.True(ok)
+	a.Equal(testUser.ID, id)
+	a.True(m.selfIsBot())
+}