melrōse musical expression player

package cli import ( "fmt" "strings" "github.com/emicklei/melrose/core" "github.com/emicklei/melrose/dsl" "github.com/emicklei/melrose/notify" ) var cmdFuncMap = cmdFunctions() func cmdFunctions() map[string]Command { cmds := map[string]Command{} cmds[":h"] = Command{Description: "show help, optional on a command or function", Func: showHelp} cmds[":v"] = Command{Description: "show variables, optional filter on given prefix", Func: func(ctx core.Context, args []string) notify.Message { return dsl.ListVariables(ctx.Variables(), args) }} cmds[":k"] = Command{Description: "stop all sound and loops", Func: func(ctx core.Context, args []string) notify.Message { dsl.StopAllPlayables(ctx) ctx.Device().Reset() return nil }} cmds[":b"] = Command{Description: "beat settings", Func: handleBeatSetting} cmds[":m"] = Command{Description: "MIDI settings", Func: handleMIDISetting} cmds[":q"] = Command{Description: "quit"} // no Func because it is handled in the main loop cmds[":d"] = Command{Description: "toggle debug lines", Func: handleToggleDebug} cmds[":p"] = Command{Description: "list all running", Func: handleListAllRunning} cmds[":e"] = Command{Description: "echo MIDI", Func: handleEchoNotes} return cmds } // Command represents a REPL action that starts with c colon, ":" type Command struct { Description string Sample string Func func(ctx core.Context, args []string) notify.Message } func lookupCommand(cmd string) (Command, bool) { if len(cmd) == 0 { return Command{}, false } if cmd, ok := cmdFuncMap[strings.ToLower(cmd)]; ok { return cmd, true } return Command{}, false } func handleMIDISetting(ctx core.Context, args []string) notify.Message { return ctx.Device().Command(args) } func handleBeatSetting(ctx core.Context, args []string) notify.Message { l := ctx.Control() notify.PrintHighlighted("sequencer settings:") fmt.Printf("beats per minute (BPM) = %v\n", l.BPM()) fmt.Printf("beats in a bar (BIAB) = %d\n", l.BIAB()) return nil } func handleToggleDebug(ctx core.Context, args []string) notify.Message { if notify.ToggleDebug() { return notify.NewInfof("debug enabled") } return notify.NewInfof("debug not enabled") } func handleListAllRunning(ctx core.Context, args []string) notify.Message { running := []core.Stoppable{} for _, v := range ctx.Variables().Variables() { if s, ok := v.(core.Stoppable); ok { if s.IsPlaying() { running = append(running, s) } } } for _, each := range running { fmt.Printf("%s = %s\n", ctx.Variables().NameFor(each), core.Storex(each)) } return nil } func handleEchoNotes(ctx core.Context, args []string) notify.Message { return ctx.Device().Command(append([]string{"e"}, args...)) }