add help dialogue

add guard for toggleCmd to prevent unsafe gain changes.

use logrus for control of log levels.

add an input prompt for interactive mode

examples/vm-cli/README.md

@@ -1,6 +1,6 @@
 ## About
 
-A simple voicemeeter-cli program. Offers ability to toggle, get and set parameters.
+A Voicemeeter CLI, offers ability to toggle, get and set parameters.
 
 ## Install
 
@@ -8,28 +8,31 @@ First build and install it with `go install` (skip this step if using binary fro
 
 ## Use
 
-Toggle with `!` prefix, get by excluding `=` and set by including `=`. Mix and match arguments.
+Commands that begin with `!` will toggle a parameter, commands that contain `=` will set a parameter, all other commands will get a value.
 
 You may pass the following optional flags:
 
--   -v: (-verbose) to toggle console output.
+- -h: Print the help dialogue
--   -i: (-interactive) to toggle interactive mode.
+- -i: Enable interactive mode
--   -k: (-kind) to set the kind of Voicemeeter. Defaults to banana.
+- -k: The kind of Voicemeeter GUI to launch, defaults to Banana
--   -d: (-delay) to set a delay on the getters. Defaults to 20ms.
+- -l: Log level (0 up to 6), defaults to 3, Warn Level
+- -d: Set the delay between commands, defaults to 20ms
+- -v: Enable extra console output (toggle and set messages).
 
 for example:
 
-`vm-cli.exe -v -k=potato -d=25 strip[0].mute=0 strip[0].mute !strip[0].mute strip[0].mute bus[0].gain=-8.8 command.lock=1`
+`vm-cli.exe -v -l=4 -k=potato strip[0].mute=0 strip[0].mute !strip[0].mute strip[0].mute bus[0].gain=-8.8 command.lock=1`
 
 Expected output:
 
 ```
-Running command strip[0].mute=0
+time="<timestamp>" level=info msg="Logged into Voicemeeter Banana v2.1.1.1"
-Value of strip[0].mute is: 0
+strip[0].mute: 1.00
 Toggling strip[0].mute
-Value of strip[0].mute is: 1
+strip[0].mute: 0.00
-Running command bus[0].gain=-8.8
+Setting strip[0].label=podmic
-Running command command.lock=1
+strip[0].label: podmic
+time="<timestamp>" level=info msg="Logged out of Voicemeeter Banana"
 ```
 
-If running in interactive mode enter `q`, `quit` or `<Enter>` to exit.
+If running in interactive mode enter `Q`, to exit.

examples/vm-cli/main.go

@@ -4,26 +4,36 @@ import (
 	"bufio"
 	"flag"
 	"fmt"
-	"log"
 	"os"
 	"strings"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/onyx-and-iris/voicemeeter/v2"
 )
 
-type (
+const (
-	verbosePrinter struct {
+	FLOAT = iota
-		verbose bool
+	STRING
-	}
 )
 
+type result struct {
+	kind        int
+	stringParam string
+	floatParam  float64
+}
+
+type verbosePrinter struct {
+	verbose bool
+}
+
 func newVerbosePrinter() *verbosePrinter {
 	return &verbosePrinter{}
 }
 
 func (v *verbosePrinter) printf(format string, a ...interface{}) {
 	if v.verbose {
-		fmt.Printf(format+"\n", a...)
+		fmt.Printf(format, a...)
 	}
 }
 
@@ -40,28 +50,66 @@ func main() {
 		kind        string
 		delay       int
 		interactive bool
+		loglevel    int
+		help        bool
 	)
 
+	flag.BoolVar(&help, "help", false, "print the help dialogue")
+	flag.BoolVar(&help, "h", false, "print the help dialogue (shorthand)")
 	flag.StringVar(&kind, "kind", "banana", "kind of voicemeeter")
 	flag.StringVar(&kind, "k", "banana", "kind of voicemeeter (shorthand)")
 	flag.IntVar(&delay, "delay", 20, "delay between commands")
 	flag.IntVar(&delay, "d", 20, "delay between commands (shorthand)")
-	flag.BoolVar(&vPrinter.verbose, "verbose", false, "toggle console output")
-	flag.BoolVar(&vPrinter.verbose, "v", false, "toggle console output (shorthand)")
 	flag.BoolVar(&interactive, "interactive", false, "toggle interactive mode")
 	flag.BoolVar(&interactive, "i", false, "toggle interactive mode (shorthand)")
+	flag.IntVar(&loglevel, "loglevel", int(log.WarnLevel), "set the log level")
+	flag.IntVar(&loglevel, "l", int(log.WarnLevel), "set the log level (shorthand)")
+	flag.BoolVar(&vPrinter.verbose, "verbose", false, "toggle console output")
+	flag.BoolVar(&vPrinter.verbose, "v", false, "toggle console output (shorthand)")
 	flag.Parse()
 
+	if help {
+		help_dialogue()
+		return
+	}
+
+	if loglevel >= int(log.PanicLevel) && loglevel <= int(log.TraceLevel) {
+		log.SetLevel(log.Level(loglevel))
+	}
+
 	vm, err := vmConnect(kind, delay)
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer vm.Logout()
 
-	err = runCommands(vm, interactive)
+	if interactive {
-	if err != nil {
+		interactiveMode(vm)
-		fmt.Println(err)
+		return
 	}
+
+	args := flag.Args()
+	if len(args) == 0 {
+		help_dialogue()
+		return
+	}
+
+	for _, arg := range args {
+		if err := parse(vm, arg); err != nil {
+			log.Error(err.Error())
+		}
+	}
+}
+
+func help_dialogue() {
+	fmt.Printf("usage: ./vm-cli [-h] [-i] [-k] [-l] [-d] [-v]\n" +
+		"Where:\n" +
+		"\th: Print the help dialogue\n" +
+		"\ti: Enable interactive mode\n" +
+		"\tk: The kind of Voicemeeter GUI to launch, defaults to Banana\n" +
+		"\tl: Log level 0 up to 6, (defaults to 3, Warn Level)\n" +
+		"\td: Set the delay between commands (defaults to 20ms)\n" +
+		"\tv: Enable extra console output (toggle and set messages).")
 }
 
 func vmConnect(kind string, delay int) (*voicemeeter.Remote, error) {
@@ -78,38 +126,23 @@ func vmConnect(kind string, delay int) (*voicemeeter.Remote, error) {
 	return vm, nil
 }
 
-func runCommands(vm *voicemeeter.Remote, interactive bool) error {
-	if interactive {
-		return interactiveMode(vm)
-	}
-	args := flag.Args()
-	if len(args) == 0 {
-		err := fmt.Errorf("must provide some commands to run")
-		return err
-	}
-	for _, arg := range args {
-		err := parse(vm, arg)
-		if err != nil {
-			vPrinter.printf(err.Error())
-		}
-	}
-	return nil
-}
-
 func interactiveMode(vm *voicemeeter.Remote) error {
-	vPrinter.printf("running in interactive mode... waiting for input")
+	fmt.Println("Interactive mode enabled. Enter 'Q' to exit.")
+
 	scanner := bufio.NewScanner(os.Stdin)
+	fmt.Printf(">> ")
 	for scanner.Scan() {
 		input := scanner.Text()
-		if input == "q" || input == "quit" || input == "" {
+		if strings.ToUpper(input) == "Q" {
-			return nil
+			break
 		}
+
 		for _, cmd := range strings.Split(input, " ") {
-			err := parse(vm, cmd)
+			if err := parse(vm, cmd); err != nil {
-			if err != nil {
+				log.Error(err.Error())
-				vPrinter.printf(err.Error())
 			}
 		}
+		fmt.Printf(">> ")
 	}
 	if scanner.Err() != nil {
 		return scanner.Err()
@@ -119,58 +152,60 @@ func interactiveMode(vm *voicemeeter.Remote) error {
 
 func parse(vm *voicemeeter.Remote, cmd string) error {
 	if cmd[0] == '!' {
-		err := toggleCmd(vm, cmd[1:])
+		if err := toggleCmd(vm, cmd[1:]); err != nil {
-		if err != nil {
+			return err
+		}
+	} else if strings.Contains(cmd, "=") {
+		if err := setCmd(vm, cmd); err != nil {
 			return err
 		}
 	} else {
-		if strings.Contains(cmd, "=") {
+		r := result{kind: FLOAT}
-			err := setCmd(vm, cmd)
+		if err := getCmd(vm, cmd, &r); err != nil {
-			if err != nil {
-				return err
-			}
-		} else {
-			err := getCmd(vm, cmd)
-			if err != nil {
 			return err
 		}
+		switch r.kind {
+		case FLOAT:
+			fmt.Printf("%s: %.2f\n", cmd, r.floatParam)
+		case STRING:
+			fmt.Printf("%s: %s\n", cmd, r.stringParam)
 		}
 	}
 	return nil
 }
 
 func toggleCmd(vm *voicemeeter.Remote, cmd string) error {
-	val, err := vm.GetFloat(cmd)
+	r := result{kind: FLOAT}
-	if err != nil {
+	if err := getCmd(vm, cmd, &r); err != nil {
-		err = fmt.Errorf("unable to toggle %s", cmd)
 		return err
 	}
-	vm.SetFloat(cmd, 1-val)
+	if r.kind == FLOAT && (r.floatParam == 0 || r.floatParam == 1) {
-	vPrinter.printf("Toggling %s", cmd)
+		vPrinter.printf("Toggling %s\n", cmd)
+		vm.SetFloat(cmd, 1-r.floatParam)
+	} else {
+		log.Warnf("%s does not appear to be a boolean parameter", cmd)
+	}
 	return nil
 }
 
 func setCmd(vm *voicemeeter.Remote, cmd string) error {
-	vPrinter.printf("Running command %s", cmd)
+	if err := vm.SendText(cmd); err != nil {
-	err := vm.SendText(cmd)
-	if err != nil {
 		err = fmt.Errorf("unable to set %s", cmd)
 		return err
 	}
+	vPrinter.printf("Setting %s\n", cmd)
 	return nil
 }
 
-func getCmd(vm *voicemeeter.Remote, cmd string) error {
+func getCmd(vm *voicemeeter.Remote, cmd string, r *result) error {
-	valF, err := vm.GetFloat(cmd)
+	if val, err := vm.GetFloat(cmd); err == nil {
-	if err != nil {
+		r.floatParam = val
-		valS, err := vm.GetString(cmd)
+	} else if val, err := vm.GetString(cmd); err == nil {
-		if err != nil {
+		r.kind = STRING
-			err = fmt.Errorf("unable to get %s", cmd)
+		r.stringParam = val
-			return err
-		}
-		fmt.Printf("Value of %s is: %s", cmd, valS)
 	} else {
-		fmt.Printf("Value of %s is: %v", cmd, valF)
+		err := fmt.Errorf("unknown parameter '%s'", cmd)
+		return err
 	}
 	return nil
 }