From 4ee99882db8019a6b49fd22f42b23fc00d2644d6 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Wed, 30 Mar 2016 00:04:00 +0200
Subject: basic telnet commands


diff --git a/src/rhctl/switch_control.go b/src/rhctl/switch_control.go
index 40dd788..b48ac07 100644
--- a/src/rhctl/switch_control.go
+++ b/src/rhctl/switch_control.go
@@ -21,9 +21,48 @@
 
 package main
 
+type CommandType uint8
+
+const (
+	CmdStatus CommandType = iota
+	CmdListen
+	CmdServer
+	CmdSwitch
+)
+
+func (c CommandType) String() string {
+	switch c {
+	case CmdStatus:
+		return "status"
+	case CmdListen:
+		return "listen"
+	case CmdServer:
+		return "server"
+	case CmdSwitch:
+		return "switch"
+	}
+	return "unknown"
+}
+
+type Command struct {
+	Type CommandType
+	args []string
+}
+
 type SwitchControl struct {
-	sw      *AudioSwitch
-	servers []*PlayoutServer
+	sw       *AudioSwitch
+	servers  []*PlayoutServer
+	Commands chan *Command
+}
+
+func (ctrl *SwitchControl) handleCommand(cmd *Command) {
+	rhdl.Printf("Telnet: got command: %+v", cmd)
+	switch cmd.Type {
+	case CmdStatus:
+	case CmdListen:
+	case CmdServer:
+	case CmdSwitch:
+	}
 }
 
 func handleServer(in <-chan ServerStatus, out chan<- ServerStatus) {
@@ -52,8 +91,9 @@ func (ctrl *SwitchControl) Run() {
 		case status := <-serverUpdates:
 			rhdl.Printf("got server status update: %+v", status)
 			// TODO: recalculate overall status and send out commands to switch
+		case cmd := <-ctrl.Commands:
+			ctrl.handleCommand(cmd)
 		}
-		// TODO: add handler for requests from control clients
 	}
 }
 
@@ -61,5 +101,6 @@ func SwitchControlInit(conf *Config, sw *AudioSwitch, servers []*PlayoutServer)
 	ctrl = &SwitchControl{}
 	ctrl.sw = sw
 	ctrl.servers = servers
+	ctrl.Commands = make(chan *Command, 8)
 	return
 }
diff --git a/src/rhctl/telnet.go b/src/rhctl/telnet.go
index 3cc2b44..8d73846 100644
--- a/src/rhctl/telnet.go
+++ b/src/rhctl/telnet.go
@@ -29,13 +29,82 @@ type TelnetInterface struct {
 	server *telgo.Server
 }
 
-func status(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
-	// TODO: get status from ctrl
-	c.Sayln("not yet implemented!")
+func telnetStatus(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
+	ctrl.Commands <- &Command{Type: CmdStatus}
+	// TODO: implement this
 	return false
 }
 
-func quit(c *telgo.Client, args []string) bool {
+func telnetListen(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
+	ctrl.Commands <- &Command{Type: CmdListen}
+	// TODO: implement this
+	return false
+}
+
+func telnetServer(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
+	ctrl.Commands <- &Command{Type: CmdServer}
+	// TODO: implement this
+	return false
+}
+
+func telnetSwitch(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
+	ctrl.Commands <- &Command{Type: CmdSwitch}
+	// TODO: implement this
+	return false
+}
+
+func telnetHelp(c *telgo.Client, args []string) bool {
+	switch len(args) {
+	case 2:
+		switch args[1] {
+		case "quit":
+			c.Sayln("usage: quit")
+			c.Sayln("   terminates the client connection. You may also use Ctrl-D to do this.")
+			return false
+		case "help":
+			c.Sayln("usage: help [ <cmd> ]")
+			c.Sayln("   prints command overview or detailed info to <cmd>.")
+			return false
+		case "status":
+			c.Sayln("usage: status")
+			c.Sayln("   show the status of the switch and servers")
+			return false
+		case "listen":
+			c.Sayln("usage: listen [ <type> ]")
+			c.Sayln("   subscribe to messages of type <type>. The following types are allowed:")
+			c.Sayln("    - status    audio input/output mapping changes")
+			c.Sayln("    - gpi       general purpose input status messages")
+			c.Sayln("    - oc        open-collector status messages")
+			c.Sayln("    - relay     relay status messages")
+			c.Sayln("    - silence   status of the silence detector")
+			c.Sayln("")
+			c.Sayln("   if you omit the type this client you will be subscribed to all types.")
+			return false
+		case "server":
+			c.Sayln("usage: server <name>")
+			c.Sayln("   switch to the server of name <name>. If the given server name does not")
+			c.Sayln("   exist or is dead, the switch-over will be denied")
+			return false
+		case "switch":
+			c.Sayln("usage: switch <cmd> [ [ <arg1> ] ... ]")
+			c.Sayln("   send commands to tha audio switch directley.")
+			return false
+		}
+		fallthrough
+	default:
+		c.Sayln("usage: <cmd> [ [ <arg1> ] ... ]")
+		c.Sayln("  available commands:")
+		c.Sayln("    quit                             close connection (or use Ctrl-D)")
+		c.Sayln("    help [ <cmd> ]                   print this, or help for specific command")
+		c.Sayln("    status                           show status of switch and all servers")
+		c.Sayln("    listen [ <type> ]                add listener for messages of type <type>")
+		c.Sayln("    server <name>                    switch to server <name>")
+		c.Sayln("    switch <cmd> [ [ <arg1> ] ... ]  send command to switch")
+	}
+	return false
+}
+
+func telnetQuit(c *telgo.Client, args []string) bool {
 	return true
 }
 
@@ -50,8 +119,12 @@ func TelnetInit(conf *Config, ctrl *SwitchControl) (telnet *TelnetInterface) {
 	telnet = &TelnetInterface{}
 
 	cmdlist := make(telgo.CmdList)
-	cmdlist["status"] = func(c *telgo.Client, args []string) bool { return status(c, args, ctrl) }
-	cmdlist["quit"] = quit
+	cmdlist["status"] = func(c *telgo.Client, args []string) bool { return telnetStatus(c, args, ctrl) }
+	cmdlist["listen"] = func(c *telgo.Client, args []string) bool { return telnetListen(c, args, ctrl) }
+	cmdlist["server"] = func(c *telgo.Client, args []string) bool { return telnetServer(c, args, ctrl) }
+	cmdlist["switch"] = func(c *telgo.Client, args []string) bool { return telnetSwitch(c, args, ctrl) }
+	cmdlist["help"] = telnetHelp
+	cmdlist["quit"] = telnetQuit
 
 	telnet.server = telgo.NewServer(conf.Clients.Telnet.Address, "rhctl> ", cmdlist, ctrl)
 
-- 
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