safcm: move sync.sendRecv to frontend package

[safcm/safcm.git] / frontend / conn.go

diff --git a/frontend/conn.go b/frontend/conn.go
new file mode 100644 (file)
index 0000000..10f7c7b
--- /dev/null
+++ b/frontend/conn.go
@@ -0,0 +1,47 @@
+// Frontend: Connection functions for programs using the safcm library
+
+// Copyright (C) 2021  Simon Ruderich
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package frontend
+
+import (
+       "ruderich.org/simon/safcm"
+       "ruderich.org/simon/safcm/rpc"
+)
+
+// SendRecv sends a message for host over conn and waits for the response. Any
+// MsgLog messages received before the final (non MsgLog) response are passed
+// to l.Log.
+func (l *Loop) SendRecv(host Host, conn *rpc.Conn, msg safcm.Msg) (
+       safcm.Msg, error) {
+
+       err := conn.Send(msg)
+       if err != nil {
+               return nil, err
+       }
+       for {
+               x, err := conn.Recv()
+               if err != nil {
+                       return nil, err
+               }
+               log, ok := x.(safcm.MsgLog)
+               if ok {
+                       l.Log(host, log.Level, false, log.Text)
+                       continue
+               }
+               return x, nil
+       }
+}