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/tgtest/services/file/file.go

@@ -0,0 +1,97 @@
+// Package file contains file service implementation for tgtest server.
+package file
+
+import (
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgtest"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgtest/services"
+)
+
+// Service is a Telegram file service.
+type Service struct {
+	storage Storage
+	// Size of part to use in tg.FileHash.
+	hashPartSize int
+	// Size of range to return in upload.getFileHashes.
+	hashRangeSize int
+}
+
+// NewService creates new file Service.
+func NewService(cfg Config) *Service {
+	cfg.setDefaults()
+
+	return &Service{
+		storage:       cfg.Storage,
+		hashPartSize:  cfg.HashPartSize,
+		hashRangeSize: cfg.HashRangeSize,
+	}
+}
+
+// OnMessage implements tgtest.Handler.
+func (m *Service) OnMessage(server *tgtest.Server, req *tgtest.Request) error {
+	id, err := req.Buf.PeekID()
+	if err != nil {
+		return err
+	}
+
+	switch id {
+	case tg.UploadGetFileRequestTypeID:
+		fileReq := tg.UploadGetFileRequest{}
+		if err := fileReq.Decode(req.Buf); err != nil {
+			return err
+		}
+
+		r, err := m.UploadGetFile(req.RequestCtx, &fileReq)
+		if err != nil {
+			return err
+		}
+
+		return server.SendResult(req, r)
+	case tg.UploadGetFileHashesRequestTypeID:
+		fileReq := tg.UploadGetFileHashesRequest{}
+		if err := fileReq.Decode(req.Buf); err != nil {
+			return err
+		}
+
+		r, err := m.UploadGetFileHashes(req.RequestCtx, &fileReq)
+		if err != nil {
+			return err
+		}
+
+		return server.SendResult(req, &tg.FileHashVector{Elems: r})
+	case tg.UploadSaveFilePartRequestTypeID:
+		fileReq := tg.UploadSaveFilePartRequest{}
+		if err := fileReq.Decode(req.Buf); err != nil {
+			return err
+		}
+
+		r, err := m.UploadSaveFilePart(req.RequestCtx, &fileReq)
+		if err != nil {
+			return err
+		}
+
+		return server.SendBool(req, r)
+	case tg.UploadSaveBigFilePartRequestTypeID:
+		fileReq := tg.UploadSaveBigFilePartRequest{}
+		if err := fileReq.Decode(req.Buf); err != nil {
+			return err
+		}
+
+		r, err := m.UploadSaveBigFilePart(req.RequestCtx, &fileReq)
+		if err != nil {
+			return err
+		}
+
+		return server.SendBool(req, r)
+	default:
+		return services.ErrMethodNotImplemented
+	}
+}
+
+// Register registers service handlers.
+func (m *Service) Register(dispatcher *tgtest.Dispatcher) {
+	dispatcher.HandleFunc(tg.UploadGetFileRequestTypeID, m.OnMessage)
+	dispatcher.HandleFunc(tg.UploadGetFileHashesRequestTypeID, m.OnMessage)
+	dispatcher.HandleFunc(tg.UploadSaveFilePartRequestTypeID, m.OnMessage)
+	dispatcher.HandleFunc(tg.UploadSaveBigFilePartRequestTypeID, m.OnMessage)
+}