commands.go

package main

import (
	"flag"
	"fmt"
	"os"
	"strconv"
	"strings"

	"github.com/fatih/color"
)

type CmdFlags struct {
	Add    string
	Del    int
	DelAll bool
	Edit   string
	Toggle int
	List   bool
}

func NewCmdFlags() *CmdFlags {
	cf := CmdFlags{}

	flag.StringVar(&cf.Add, "add", "", "Add a new task by specifying title")
	flag.StringVar(&cf.Edit, "edit", "", "Edit a task by index & specify a new title. id:new_title")
	flag.IntVar(&cf.Del, "del", -1, "Specify a task by index to delete")
	flag.BoolVar(&cf.DelAll, "deleteAll", false, "Delete all tasks from list")
	flag.IntVar(&cf.Toggle, "toggle", -1, "Specify a task by index to toggle")
	flag.BoolVar(&cf.List, "list", false, "List all Tasks")

	flag.Parse()

	return &cf
}

func (cf *CmdFlags) Execute(t *Tasks) {
	switch {
	case cf.List:
		t.Print()
	case cf.Add != "":
		t.Add(cf.Add)
		t.Print()
	case cf.Edit != "":
		parts := strings.SplitN(cf.Edit, ":", 2)
		if len(parts) != 2 {
			fmt.Println("Error, invalid format for edit. Please use id:new_title")
			os.Exit(1)
		}

		index, err := strconv.Atoi(parts[0])

		if err != nil {
			fmt.Println("Error: Invalid Index for Edit")
			os.Exit(1)
		}
		t.Edit(index, parts[1])
		t.Print()
	case cf.Toggle != -1:
		t.Toggle(cf.Toggle)
		t.Print()
	case cf.Del != -1:
		t.Delete(cf.Del)
		t.Print()
	case cf.DelAll == true:
		t.DeleteAll()
		color.Green("Deleted all Tasks Successfully.")

	default:
		fmt.Println("Invalid Command!")
	}
}