cache.go

package main

import (
	"os/user"
	"path/filepath"
	"strconv"
	"fmt"
	"os"
)

func getCachePath(path... string) (string, error) {
	usr, err := user.Current()

	if err != nil {
		return "", err
	}

	cachePath := filepath.Join(usr.HomeDir, ".pokevision-cli")
	if len(path) > 0 {
		cachePath = filepath.Join(cachePath, filepath.Join(path...))
	}

	return cachePath, nil;
}

func existsInCache(path string) bool {
	if _, err := os.Stat(path); !os.IsNotExist(err) {
		return true
	}
	return false
}

func DownloadIcon(index int) (string, error) {
	path, _ := getCachePath("icons", strconv.Itoa(index) + ".png")
	if !existsInCache(path) {
		url := fmt.Sprintf(POKEDEX_POKEMON_ICON_URL, index)
		err := RequestToPath(url, path)
		if err != nil {
			return "", err
		}
		return path, nil
	}
	return path, nil
}