deck.go

package main

import (
	"fmt"
	"io/ioutil"
	"math/rand"
	"os"
	"strings"
)

// Create a new type of 'deck'
// which is a slice of strings
type deck []string

func (d deck) print() {
	for _, card := range d {
		fmt.Println(card)
	}
}

func newDeck() deck {
	cards := deck{}
	cardSuits := []string{"Spades", "Hearts", "Diamonds", "Clubs"}
	cardValues := []string{"Ace", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King"}

	for _, suit := range cardSuits {
		for _, value := range cardValues {
			cards = append(cards, value+" of "+suit)
		}
	}
	return cards
}

func deal(d deck, handSize int) (deck, deck) {
	return d[:handSize], d[handSize:]
}

func (d deck) toString() string {
	return strings.Join([]string(d), ",")
}

func (d deck) saveTofile(filename string) error {
	return ioutil.WriteFile(filename, []byte(d.toString()), 0666)
}

//func saveTofile(filename string) error {
//	return ioutil.WriteFile(filename, []byte(d.toString()), 0666)
//}

func newDeckFromFile(filename string) deck {
	bs, err := ioutil.ReadFile(filename)
	if err != nil {
		// Option #1 print out err and make a call to new deck function
		// Option #2 print out err and and exit
		fmt.Println("Error:", err)
		os.Exit(1)
	}
	s := strings.Split(string(bs), ",")
	return deck(s)
}

func (d deck) shuffle() {
	for i := range d {
		newPosition := rand.Intn(len(d) - 1)
		d[i], d[newPosition] = d[newPosition], d[i]
	}
}