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/fileid/decode_test.go

@@ -0,0 +1,181 @@
+package fileid
+
+import (
+	"encoding/base64"
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+var testData = map[string]string{
+	"Sticker":         "CAACAgIAAxkBAAM6YZlDEHCmaTKrUhCIjxAPtPtjVx4AAicAA4dXjx6dGLyHwXVNcCIE",
+	"AnimatedSticker": "CAACAgIAAxkBAANCYZzsGL3c2jB4BE46_bD9-aaYH10AApEOAAJZQylKSstCqeiyJ5giBA",
+	"GIF":             "CgACAgIAAxkBAAM7YZqVjhoGXOIk6qgVu7xd0QvyRVEAArQQAAK7XrBIi5xgKHPRFpQiBA",
+	"GIFThumbnail":    "AAMCAgADGQEAAzthmpWOGgZc4iTqqBW7vF3RC_JFUQACtBAAArtesEiLnGAoc9EWlAEAB20AAyIE",
+	"Photo":           "AgACAgIAAxkBAAM9YZqXG-B0WHEv7lFlQxOQDs6jrGQAAoa7MRvdfNlIhJa73cDxR0kBAAMCAAN4AAMiBA",
+	"Video":           "BAACAgIAAxkBAANAYZzjSkCVY7Ttrp2l92eCQzYYxVEAAkoRAAJIYKFIRionwJTz4kIiBA",
+	"VideoThumbnail":  "AAMCAgADGQEAA0BhnONKQJVjtO2unaX3Z4JDNhjFUQACShEAAkhgoUhGKifAlPPiQgEAB20AAyIE",
+	"ChatPhoto":       "AQADAgAD7a8xG75QcEkACAMAA2jAIuIW____cd7THMWjNdIiBA",
+	"Voice":           "AwACAgIAAxkBAANDYZzsXw55-6fljCSeQXEP3dX5_egAAlkSAAJStulIAYO3JdIypKQiBA",
+	"Audio":           "CQACAgIAAxkBAANEYZzt3rDAw5CkHSU8RZA8AzTTsyMAAvACAAKoAAF4SjhQUd8y3lIoIgQ",
+}
+
+var wantData = map[string]FileID{
+	"Sticker": {
+		Type:          Sticker,
+		DC:            2,
+		ID:            2202074980139663399,
+		AccessHash:    8092253579521038493,
+		FileReference: []byte("\x01\x00\x00\x00:a\x99C\x10p\xa6i2\xabR\x10\x88\x8f\x10\x0f\xb4\xfbcW\x1e"),
+	},
+	"AnimatedSticker": {
+		Type:          Sticker,
+		DC:            2,
+		ID:            5343876482382958225,
+		AccessHash:    -7482815543510906038,
+		FileReference: []byte("\x01\x00\x00\x00Ba\x9c\xec\x18\xbd\xdc\xda0x\x04N:\xfd\xb0\xfd\xf9\xa6\x98\x1f]"),
+	},
+	"GIF": {
+		Type:          Animation,
+		DC:            2,
+		ID:            5237790523883786420,
+		AccessHash:    -7775797414079718261,
+		FileReference: []byte("\x01\x00\x00\x00;a\x9a\x95\x8e\x1a\x06\\\xe2$\xea\xa8\x15\xbb\xbc]\xd1\v\xf2EQ"),
+	},
+	"GIFThumbnail": {
+		Type:          Thumbnail,
+		DC:            2,
+		ID:            5237790523883786420,
+		AccessHash:    -7775797414079718261,
+		FileReference: []byte("\x01\x00\x00\x00;a\x9a\x95\x8e\x1a\x06\\\xe2$\xea\xa8\x15\xbb\xbc]\xd1\v\xf2EQ"),
+		PhotoSizeSource: PhotoSizeSource{
+			Type:          PhotoSizeSourceThumbnail,
+			ThumbnailType: 109,
+		},
+	},
+	"Photo": {
+		Type:          Photo,
+		DC:            2,
+		ID:            5249364129762884486,
+		AccessHash:    5280454898771269252,
+		FileReference: []byte("\x01\x00\x00\x00=a\x9a\x97\x1b\xe0tXq/\xeeQeC\x13\x90\x0eΣ\xacd"),
+		PhotoSizeSource: PhotoSizeSource{
+			Type:          PhotoSizeSourceThumbnail,
+			FileType:      Photo,
+			ThumbnailType: 120,
+		},
+	},
+	"Video": {
+		Type:          Video,
+		DC:            2,
+		ID:            5233570104335143242,
+		AccessHash:    4819682371444353606,
+		FileReference: []byte("\x01\x00\x00\x00@a\x9c\xe3J@\x95c\xb4\xed\xae\x9d\xa5\xf7g\x82C6\x18\xc5Q"),
+	},
+	"VideoThumbnail": {
+		Type:          Thumbnail,
+		DC:            2,
+		ID:            5233570104335143242,
+		AccessHash:    4819682371444353606,
+		FileReference: []byte("\x01\x00\x00\x00@a\x9c\xe3J@\x95c\xb4\xed\xae\x9d\xa5\xf7g\x82C6\x18\xc5Q"),
+		PhotoSizeSource: PhotoSizeSource{
+			Type:          PhotoSizeSourceThumbnail,
+			ThumbnailType: 109,
+		},
+	},
+	"ChatPhoto": {
+		Type: ProfilePhoto,
+		DC:   2,
+		ID:   5291818339590582253,
+		PhotoSizeSource: PhotoSizeSource{
+			Type:             PhotoSizeSourceDialogPhotoBig,
+			DialogID:         -1001228418968,
+			DialogAccessHash: -3299551084991488399,
+		},
+	},
+	"Voice": {
+		Type:          Voice,
+		DC:            2,
+		ID:            5253930903607972441,
+		AccessHash:    -6583080877151517951,
+		FileReference: []byte("\x01\x00\x00\x00Ca\x9c\xec_\x0ey\xfb\xa7\xe5\x8c$\x9eAq\x0f\xdd\xd5\xf9\xfd\xe8"),
+	},
+	"Audio": {
+		Type:          Audio,
+		DC:            2,
+		ID:            5366039677566452464,
+		AccessHash:    2905629019683770424,
+		FileReference: []byte("\x01\x00\x00\x00Da\x9c\xedް\xc0Ð\xa4\x1d%<E\x90<\x034ӳ#"),
+	},
+}
+
+func TestDecodeFileID(t *testing.T) {
+	type testCase struct {
+		name    string
+		input   string
+		want    FileID
+		wantErr bool
+	}
+	tests := []testCase{
+		{
+			"Empty",
+			"",
+			FileID{},
+			true,
+		},
+		{
+			"InvalidBase64",
+			"/-*-/--+",
+			FileID{},
+			true,
+		},
+		{
+			"TooSmallLength",
+			base64.RawURLEncoding.EncodeToString([]byte{1}),
+			FileID{},
+			true,
+		},
+		{
+			"UnsupportedVersion",
+			base64.RawURLEncoding.EncodeToString([]byte{1, persistentIDVersionOld}),
+			FileID{},
+			true,
+		},
+		{
+			"UnknownVersion",
+			base64.RawURLEncoding.EncodeToString([]byte{1, 20}),
+			FileID{},
+			true,
+		},
+	}
+	for name, input := range testData {
+		expect, ok := wantData[name]
+		if !ok {
+			t.Fatalf("Update wantData[%q]", name)
+		}
+		tests = append(tests, testCase{
+			name:    name,
+			input:   input,
+			want:    expect,
+			wantErr: false,
+		})
+	}
+	sort.Slice(tests, func(i, j int) bool {
+		return tests[i].name < tests[j].name
+	})
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			a := require.New(t)
+
+			got, err := DecodeFileID(tt.input)
+			if tt.wantErr {
+				a.Error(err)
+			} else {
+				a.NoError(err)
+				a.Equal(tt.want, got)
+			}
+		})
+	}
+}