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/auth/flow_test.go

@@ -0,0 +1,114 @@
+package auth_test
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/auth"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/testutil"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func askCode(code string, err error) auth.CodeAuthenticatorFunc {
+	return func(ctx context.Context, sentCode *tg.AuthSentCode) (string, error) {
+		return code, err
+	}
+}
+
+func TestConstantAuth(t *testing.T) {
+	a := require.New(t)
+	authConst := auth.Constant("phone", "password", askCode("123", nil))
+	ctx := context.Background()
+
+	result, err := authConst.Code(ctx, nil)
+	a.NoError(err)
+	a.Equal("123", result)
+
+	result, err = authConst.Phone(ctx)
+	a.NoError(err)
+	a.Equal("phone", result)
+
+	result, err = authConst.Password(ctx)
+	a.NoError(err)
+	a.Equal("password", result)
+}
+
+func TestCodeOnlyAuth(t *testing.T) {
+	a := require.New(t)
+	authCodeOnly := auth.CodeOnly("phone", askCode("123", nil))
+	ctx := context.Background()
+
+	result, err := authCodeOnly.Code(ctx, nil)
+	a.NoError(err)
+	a.Equal("123", result)
+
+	result, err = authCodeOnly.Phone(ctx)
+	a.NoError(err)
+	a.Equal("phone", result)
+
+	_, err = authCodeOnly.Password(ctx)
+	a.ErrorIs(err, auth.ErrPasswordNotProvided)
+}
+
+func TestEnvAuth(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+
+	prefix := "TEST_ENV_AUTH_"
+	authEnv := auth.Env(prefix, askCode("123", nil))
+
+	result, err := authEnv.Code(ctx, nil)
+	a.NoError(err)
+	a.Equal("123", result)
+
+	_, err = authEnv.Phone(ctx)
+	a.Error(err)
+
+	_, err = authEnv.Password(ctx)
+	a.ErrorIs(err, auth.ErrPasswordNotProvided)
+
+	// Set envs.
+	testutil.SetEnv(t, prefix+"PHONE", "phone")
+	testutil.SetEnv(t, prefix+"PASSWORD", "password")
+
+	result, err = authEnv.Phone(ctx)
+	a.NoError(err)
+	a.Equal("phone", result)
+
+	result, err = authEnv.Password(ctx)
+	a.NoError(err)
+	a.Equal("password", result)
+}
+
+func TestTestAuth(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	testAuth := auth.Test(testutil.ZeroRand{}, 2)
+
+	_, err := testAuth.Code(ctx, &tg.AuthSentCode{
+		Type: &tg.AuthSentCodeTypeFlashCall{},
+	})
+	a.Error(err)
+
+	result, err := testAuth.Code(ctx, nil)
+	a.NoError(err)
+	a.Equal("22222", result)
+
+	result, err = testAuth.Code(ctx, &tg.AuthSentCode{
+		Type: &tg.AuthSentCodeTypeApp{
+			Length: 1,
+		},
+	})
+	a.NoError(err)
+	a.Equal("2", result)
+
+	result, err = testAuth.Phone(ctx)
+	a.NoError(err)
+	a.True(strings.HasPrefix(result, "999662"))
+
+	_, err = testAuth.Password(ctx)
+	a.ErrorIs(err, auth.ErrPasswordNotProvided)
+}