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/messages/specialize_test.go

@@ -0,0 +1,133 @@
+package messages
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+func Test_getDocFilename(t *testing.T) {
+	date := time.Now()
+	f := date.Format(dateLayout)
+
+	tests := []struct {
+		name string
+		args *tg.Document
+		want string
+	}{
+		{
+			"Doc",
+			&tg.Document{
+				Date: int(date.Unix()),
+				Attributes: []tg.DocumentAttributeClass{
+					&tg.DocumentAttributeFilename{FileName: "10.jpg"},
+				},
+			},
+			"10.jpg",
+		},
+		{
+			"Gif",
+			&tg.Document{
+				Date: int(date.Unix()),
+				Attributes: []tg.DocumentAttributeClass{
+					&tg.DocumentAttributeAnimated{},
+				},
+			},
+			"doc0_" + f + ".gif",
+		},
+		{
+			"Video",
+			&tg.Document{
+				Date: int(date.Unix()),
+				Attributes: []tg.DocumentAttributeClass{
+					&tg.DocumentAttributeVideo{},
+				},
+			},
+			"doc0_" + f + ".mp4",
+		},
+		{
+			"Photo",
+			&tg.Document{
+				Date: int(date.Unix()),
+				Attributes: []tg.DocumentAttributeClass{
+					&tg.DocumentAttributeImageSize{},
+				},
+			},
+			"doc0_" + f + ".jpg",
+		},
+		{
+			"Audio",
+			&tg.Document{
+				Date: int(date.Unix()),
+				Attributes: []tg.DocumentAttributeClass{
+					&tg.DocumentAttributeAudio{},
+				},
+			},
+			"doc0_" + f + ".mp3",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			require.Equal(t, tt.want, getDocFilename(tt.args))
+		})
+	}
+}
+
+func TestElem_File(t *testing.T) {
+	type results struct {
+		file, doc, photo bool
+	}
+	tests := []struct {
+		Name string
+		Msg  tg.NotEmptyMessage
+		results
+	}{
+		{"EmptyMessage", &tg.Message{}, results{}},
+		{"ServiceMessage", &tg.MessageService{}, results{}},
+		{"EmptyPhoto", &tg.Message{
+			Media: &tg.MessageMediaPhoto{
+				Photo: &tg.PhotoEmpty{},
+			},
+		}, results{}},
+		{"EmptyDoc", &tg.Message{
+			Media: &tg.MessageMediaDocument{
+				Document: &tg.DocumentEmpty{},
+			},
+		}, results{}},
+		{"Photo", &tg.Message{
+			Media: &tg.MessageMediaPhoto{
+				Photo: &tg.Photo{
+					Sizes: []tg.PhotoSizeClass{
+						&tg.PhotoSize{
+							Type: "cock",
+							W:    10,
+							H:    10,
+						},
+					},
+				},
+			},
+		}, results{file: true, photo: true}},
+		{"Document", &tg.Message{
+			Media: &tg.MessageMediaDocument{
+				Document: &tg.Document{},
+			},
+		}, results{file: true, doc: true}},
+	}
+	for _, test := range tests {
+		t.Run(test.Name, func(t *testing.T) {
+			a := require.New(t)
+			var ok bool
+
+			elem := Elem{Msg: test.Msg}
+			_, ok = elem.File()
+			a.Equal(test.file, ok)
+			_, ok = elem.Document()
+			a.Equal(test.doc, ok)
+			_, ok = elem.Photo()
+			a.Equal(test.photo, ok)
+		})
+	}
+}