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/into.go

@@ -0,0 +1,105 @@
+package fileid
+
+import "go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+
+// AsInputWebFileLocation converts file ID to tg.InputWebFileLocationClass.
+func (f FileID) AsInputWebFileLocation() (tg.InputWebFileLocationClass, bool) {
+	if f.URL == "" {
+		return nil, false
+	}
+
+	return &tg.InputWebFileLocation{
+		URL:        f.URL,
+		AccessHash: f.AccessHash,
+	}, true
+}
+
+func (f FileID) asPhotoLocation() (tg.InputFileLocationClass, bool) {
+	switch src := f.PhotoSizeSource; src.Type {
+	case PhotoSizeSourceLegacy:
+	case PhotoSizeSourceThumbnail:
+		switch src.FileType {
+		case Photo, Thumbnail:
+			return &tg.InputPhotoFileLocation{
+				ID:            f.ID,
+				AccessHash:    f.AccessHash,
+				FileReference: f.FileReference,
+				ThumbSize:     string(f.PhotoSizeSource.ThumbnailType),
+			}, true
+		}
+	case PhotoSizeSourceDialogPhotoSmall,
+		PhotoSizeSourceDialogPhotoBig:
+		return &tg.InputPeerPhotoFileLocation{
+			Big:     src.Type == PhotoSizeSourceDialogPhotoBig,
+			Peer:    src.dialogPeer(),
+			PhotoID: f.ID,
+		}, true
+	case PhotoSizeSourceStickerSetThumbnail:
+	case PhotoSizeSourceFullLegacy:
+		return &tg.InputPhotoLegacyFileLocation{
+			ID:            f.ID,
+			AccessHash:    f.AccessHash,
+			FileReference: f.FileReference,
+			VolumeID:      f.PhotoSizeSource.VolumeID,
+			LocalID:       f.PhotoSizeSource.LocalID,
+			Secret:        f.PhotoSizeSource.Secret,
+		}, true
+	case PhotoSizeSourceDialogPhotoSmallLegacy,
+		PhotoSizeSourceDialogPhotoBigLegacy:
+		return &tg.InputPeerPhotoFileLocationLegacy{
+			Big:      src.Type == PhotoSizeSourceDialogPhotoBigLegacy,
+			Peer:     src.dialogPeer(),
+			VolumeID: f.PhotoSizeSource.VolumeID,
+			LocalID:  f.PhotoSizeSource.LocalID,
+		}, true
+	case PhotoSizeSourceStickerSetThumbnailLegacy:
+		return &tg.InputStickerSetThumbLegacy{
+			Stickerset: f.PhotoSizeSource.stickerSet(),
+			VolumeID:   f.PhotoSizeSource.VolumeID,
+			LocalID:    f.PhotoSizeSource.LocalID,
+		}, true
+	case PhotoSizeSourceStickerSetThumbnailVersion:
+		return &tg.InputStickerSetThumb{
+			Stickerset:   f.PhotoSizeSource.stickerSet(),
+			ThumbVersion: int(f.PhotoSizeSource.StickerVersion),
+		}, true
+	}
+
+	return nil, false
+}
+
+// AsInputFileLocation converts file ID to tg.InputFileLocationClass.
+func (f FileID) AsInputFileLocation() (tg.InputFileLocationClass, bool) {
+	switch f.Type {
+	case Thumbnail, ProfilePhoto, Photo:
+		return f.asPhotoLocation()
+	case Encrypted:
+		return &tg.InputEncryptedFileLocation{
+			ID:         f.ID,
+			AccessHash: f.AccessHash,
+		}, true
+	case SecureRaw,
+		Secure:
+		return &tg.InputSecureFileLocation{
+			ID:         f.ID,
+			AccessHash: f.AccessHash,
+		}, true
+	case Video,
+		Voice,
+		Document,
+		Sticker,
+		Audio,
+		Animation,
+		VideoNote,
+		Background,
+		DocumentAsFile:
+		return &tg.InputDocumentFileLocation{
+			ID:            f.ID,
+			AccessHash:    f.AccessHash,
+			FileReference: f.FileReference,
+			ThumbSize:     "", // ?
+		}, true
+	}
+
+	return nil, false
+}