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/message/peer/constraint_test.go

@@ -0,0 +1,146 @@
+package peer
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func createPromise(peer tg.InputPeerClass) Promise {
+	return func(ctx context.Context) (tg.InputPeerClass, error) {
+		return peer, nil
+	}
+}
+
+func TestConstraintsCombine(t *testing.T) {
+	decorate := func(promise Promise, decorators ...PromiseDecorator) Promise {
+		for _, decorator := range decorators {
+			promise = decorator(promise)
+		}
+		return promise
+	}
+
+	tests := []struct {
+		name       string
+		decorators []PromiseDecorator
+		input      tg.InputPeerClass
+		wantErr    bool
+	}{
+		{
+			"UserOrChannel",
+			[]PromiseDecorator{OnlyUser, OnlyChannel},
+			&tg.InputPeerChannel{
+				ChannelID:  10,
+				AccessHash: 10,
+			},
+			false,
+		},
+		{
+			"UserOrChannel",
+			[]PromiseDecorator{OnlyUser, OnlyChannel},
+			&tg.InputPeerChat{
+				ChatID: 10,
+			},
+			true,
+		},
+		{
+			"ChannelOrUser",
+			[]PromiseDecorator{OnlyChannel, OnlyUser},
+			&tg.InputPeerUser{
+				UserID:     10,
+				AccessHash: 10,
+			},
+			false,
+		},
+		{
+			"ChannelOrUser",
+			[]PromiseDecorator{OnlyChannel, OnlyUser},
+			&tg.InputPeerChat{
+				ChatID: 10,
+			},
+			true,
+		},
+	}
+	for _, test := range tests {
+		tname := "Good"
+		if test.wantErr {
+			tname = "Bad"
+		}
+		t.Run(test.name, func(t *testing.T) {
+			t.Run(tname, func(t *testing.T) {
+				a := require.New(t)
+				promise := decorate(createPromise(test.input), test.decorators...)
+				_, err := promise(context.Background())
+				if test.wantErr {
+					a.Error(err)
+				} else {
+					a.NoError(err)
+				}
+			})
+		})
+	}
+}
+
+func TestConstraints(t *testing.T) {
+	tests := []struct {
+		name      string
+		decorator func(Promise) Promise
+		input     tg.InputPeerClass
+		wantErr   bool
+	}{
+		{"Channel", OnlyChannel, &tg.InputPeerChannel{
+			ChannelID:  10,
+			AccessHash: 10,
+		}, false},
+		{"Channel", OnlyChannel, &tg.InputPeerUser{
+			UserID:     10,
+			AccessHash: 10,
+		}, true},
+		{"User", OnlyUser, &tg.InputPeerUser{
+			UserID:     10,
+			AccessHash: 10,
+		}, false},
+		{"User", OnlyUser, &tg.InputPeerSelf{}, false},
+		{"User", OnlyUser, &tg.InputPeerChannel{
+			ChannelID:  10,
+			AccessHash: 10,
+		}, true},
+		{"UserID", OnlyUserID, &tg.InputPeerUser{
+			UserID:     10,
+			AccessHash: 10,
+		}, false},
+		{"UserID", OnlyUserID, &tg.InputPeerChannel{
+			ChannelID:  10,
+			AccessHash: 10,
+		}, true},
+		{"UserID", OnlyUserID, &tg.InputPeerSelf{}, true},
+		{"Chat", OnlyChat, &tg.InputPeerChat{
+			ChatID: 10,
+		}, false},
+		{"Chat", OnlyChat, &tg.InputPeerChannel{
+			ChannelID:  10,
+			AccessHash: 10,
+		}, true},
+	}
+	for _, test := range tests {
+		tname := "Good"
+		if test.wantErr {
+			tname = "Bad"
+		}
+		t.Run(test.name, func(t *testing.T) {
+			t.Run(tname, func(t *testing.T) {
+				a := require.New(t)
+				promise := test.decorator(createPromise(test.input))
+				_, err := promise(context.Background())
+				if test.wantErr {
+					a.Error(err)
+				} else {
+					a.NoError(err)
+				}
+			})
+		})
+	}
+}