Bartos élete végéig köszöntő programocska

bartos.go

package main

import (
	"encoding/json"
	"errors"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"strconv"
	"time"
)

type gender string

const (
	Male   gender = "male"
	Female gender = "female"
)

type lifeResult struct {
	Data    lifeResultData
	Success bool
}

type lifeResultData struct {
	Date lifeResultDate
}

type lifeResultDate struct {
	Years int
}

type Bartos struct {
	InitialAge           int
	Age                  int
	birthday             time.Time
	expectedYearsFromNow int
	expectedYears        int
}

func (b *Bartos) isDead() bool {
	return b.Age >= b.expectedYears+b.InitialAge
}

func NewBartos() Bartos {
	return Bartos{
		InitialAge: 18,
		Age:        18,
		birthday:   time.Date(1995, time.February, 7, 0, 0, 0, 0, time.UTC),
	}
}

func fetchExpectedYears(bday time.Time, gender gender) (int, error) {
	client := &http.Client{}
	getValues := url.Values{}
	birthStr := strconv.Itoa(bday.Day()) + " " + bday.Month().String() + " " + strconv.Itoa(bday.Year())
	getValues.Add("birth", birthStr)
	getValues.Add("gender", string(gender))
	req, err := http.NewRequest("GET", "https://life-left.p.mashape.com/time-left?"+getValues.Encode(), nil)
	if err != nil {
		return -1, err
	}
	req.Header.Add("X-Mashape-Authorization", "paR7P8vNwZrryy2rNgQOXplGKrtxUEVA")
	resp, err := client.Do(req)
	if err != nil {
		return -1, err
	}
	jsonblob, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return -1, err
	}

	var result lifeResult
	if err := json.Unmarshal(jsonblob, &result); err != nil {
		return -1, err
	}

	if !result.Success {
		return -1, errors.New("JSON query failed, success false")
	}

	return result.Data.Date.Years, nil
}

func main() {
	bartos := NewBartos()
	years, err := fetchExpectedYears(bartos.birthday, Male)
	if err != nil {
		fmt.Println(err)
		return
	}
	bartos.expectedYears, bartos.expectedYearsFromNow = years, years
	facebookWall := make(chan string)

	go func() {
		for {
			bartos.Age++
			bartos.expectedYearsFromNow--
			facebookWall <- "Boldog " + strconv.Itoa(bartos.Age) + ".-ik szülinapot! Nyugi még van hátra " + strconv.Itoa(bartos.expectedYearsFromNow) + " éved! :)"
			//time.Sleep(8766 * time.Hour)
			time.Sleep(time.Millisecond)
		}
	}()

	for !bartos.isDead() {
		select {
		case msg := <-facebookWall:
			fmt.Println(msg)
		}
	}
	fmt.Println("you is dead, sorry")
}