qoldanbda-scratch.go

package main

import (
	"context"
	"fmt"
	"os/exec"
	"time"
)

type App struct {
	Path string
	Name string
	Launched time.Time
	DailyLimit time.Duration
	LeftLimit time.Duration
}

type AppMap map[string]App

const timeDetailsPath = "/tmp/app-details"

func fillCmapIfNot() AppMap {
	return AppMap{
		"/bin/app": {
			Name:       "app",
			Path:       "/bin/app",
			DailyLimit: 30 * time.Second,
			LeftLimit:  30 * time.Second,
		},
	}
}


func main() {
	cmap := fillCmapIfNot()
	var app App
	for _, v := range cmap {
		app = v
	}

	ctx, _ := context.WithTimeout(context.Background(), app.LeftLimit)
	cmd := exec.CommandContext(ctx, app.Path)
	if err := cmd.Start(); err!=nil {
		fmt.Printf("err: %+v\n", err)
	}

	appStart := time.Now()
	if err := cmd.Wait(); err!=nil {
		fmt.Printf("err: %+v\n", err)
	}
	appFinish := time.Now()

	usageDuration := appFinish.Sub(appStart)

	app.LeftLimit = app.LeftLimit - usageDuration

	fmt.Printf(
		"you've been using %s for %s out of %s, left %s",
		app.Name,
		usageDuration,
		app.DailyLimit,
		app.LeftLimit)
}