lib/protocol: Further interface refactor (#9396)

This is a symmetric change to #9375 -- where that PR changed the
protocol->model interface, this changes the model->protocol one.

lib/model/fakeconns_test.go

@@ -30,8 +30,8 @@ func newFakeConnection(id protocol.DeviceID, model Model) *fakeConnection {
 		model:      model,
 		closed:     make(chan struct{}),
 	}
-	f.RequestCalls(func(ctx context.Context, folder, name string, blockNo int, offset int64, size int, hash []byte, weakHash uint32, fromTemporary bool) ([]byte, error) {
-		return f.fileData[name], nil
+	f.RequestCalls(func(ctx context.Context, req *protocol.Request) ([]byte, error) {
+		return f.fileData[req.Name], nil
 	})
 	f.DeviceIDReturns(id)
 	f.ConnectionIDReturns(rand.String(16))
@@ -60,14 +60,16 @@ type fakeConnection struct {
 }
 
 func (f *fakeConnection) setIndexFn(fn func(_ context.Context, folder string, fs []protocol.FileInfo) error) {
-	f.IndexCalls(fn)
-	f.IndexUpdateCalls(fn)
+	f.IndexCalls(func(ctx context.Context, idx *protocol.Index) error { return fn(ctx, idx.Folder, idx.Files) })
+	f.IndexUpdateCalls(func(ctx context.Context, idxUp *protocol.IndexUpdate) error {
+		return fn(ctx, idxUp.Folder, idxUp.Files)
+	})
 }
 
-func (f *fakeConnection) DownloadProgress(_ context.Context, folder string, updates []protocol.FileDownloadProgressUpdate) {
+func (f *fakeConnection) DownloadProgress(_ context.Context, dp *protocol.DownloadProgress) {
 	f.downloadProgressMessages = append(f.downloadProgressMessages, downloadProgressMessage{
-		folder:  folder,
-		updates: updates,
+		folder:  dp.Folder,
+		updates: dp.Updates,
 	})
 }