+// (c) Bernhard Tittelbach, 2013
+
+package main
+
+import (
+ "errors"
+)
+
+type DoorCmdHandler struct {
+ Checker func([][]byte)(error)
+ FirmwareChar string
+}
+
+var cmdToDoorCmdHandler = map[string]DoorCmdHandler {
+ "open": DoorCmdHandler{ checkCmdDoorControl, "o"},
+ "close": DoorCmdHandler{ checkCmdDoorControl, "c"},
+ "toggle": DoorCmdHandler{ checkCmdDoorControl, "t"},
+ "status": DoorCmdHandler{ checkCmdDoorControl, "s"},
+}
+
+// ---------- Command Handling Code -------------
+
+func checkCmdDoorControl(tokens [][]byte) (error) {
+ doorctrl_usage := "syntax: <open|close|toggle> <method> <nickname>"
+ if len(tokens) != 3 {
+ return errors.New(doorctrl_usage)
+ }
+ cmd := string(tokens[0])
+ if ! (cmd == "open" || cmd == "close" || cmd == "toggle") {
+ return errors.New(doorctrl_usage)
+ }
+ method := string(tokens[1])
+ if ! (method == "Button" || method == "ssh" || method == "SSH" || method == "Phone") {
+ return errors.New("method must be one either Button, SSH or Phone")
+ }
+ if len(tokens[2]) == 0 && method != "Button" {
+ return errors.New("Operator nickname must be given")
+ }
+ return nil
+}
+
+func checkCmdStatus(tokens [][]byte) (error) {
+ if len(tokens) != 1 {
+ return errors.New("status command does not accept arguments")
+ }
+ return nil
+}
+
+func HandleCommand(tokens [][]byte, topub chan <- [][]byte, serial_wr chan string, serial_rd chan [][]byte) ([][]byte, error){
+ if len(tokens) < 1 {
+ return nil, errors.New("No Command to handle")
+ }
+
+ dch, present := cmdToDoorCmdHandler[string(tokens[0])]
+ if ! present {
+ return nil, errors.New("Unknown Command")
+ }
+
+ if err := dch.Checker(tokens); err != nil {
+ //return error to sender
+ return nil, err
+ }
+
+ topub <- tokens
+ serial_wr <- dch.FirmwareChar
+ fw_reply := <- serial_rd
+ return fw_reply, nil
+}