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// Copyright (c) 2020, Andinus <andinus@inventati.org>
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
package main
import (
"flag"
"fmt"
"log"
"math/rand"
"net/http"
"os/exec"
"strconv"
"time"
)
var (
timeout time.Duration
unsplashAPI string
width int
height int
)
func main() {
rand.Seed(time.Now().Unix())
var (
err error
imgPath string
wall string
src string
srcArr []string = []string{
"unsplash",
}
)
// Parse flags passed to program
flag.StringVar(&src, "src", "random", "Source for the image")
flag.StringVar(&wall, "wall", "random", "Daily, Weekly or Random wallpaper")
flag.IntVar(&width, "width", 1920, "Width of the image")
flag.IntVar(&height, "height", 1080, "Height of the image")
flag.StringVar(&unsplashAPI, "unsplash-api", "https://source.unsplash.com", "Unsplash Source API URL")
flag.DurationVar(&timeout, "timeout", 16, "Timeout for http client")
flag.Parse()
if src == "random" {
src = srcArr[rand.Intn(len(srcArr))]
}
// Check if the source is known
if !contains(srcArr, src) {
log.Fatal("Error: Unknown Source")
}
imgPath, err = parseSrcAndGetPath(src, wall)
errChk(err)
err = setWall(imgPath)
errChk(err)
}
func contains(arr []string, str string) bool {
for _, i := range arr {
if i == str {
return true
}
}
return false
}
// Gets image path from src
func parseSrcAndGetPath(src string, wall string) (string, error) {
var err error
var imgPath string
switch src {
case "unsplash":
fmt.Println("Unsplash Source")
imgPath, err = getPathUnsplash(wall)
}
return imgPath, err
}
func getPathUnsplash(wall string) (string, error) {
var err error
var imgPath string
switch wall {
case "daily", "weekly":
unsplashAPI = fmt.Sprintf("%s/%s",
unsplashAPI, wall)
case "random":
unsplashAPI = fmt.Sprintf("%s/%sx%s",
unsplashAPI, strconv.Itoa(width), strconv.Itoa(height))
default:
return "", fmt.Errorf("Error: Unknown wall")
}
req, err := http.NewRequest(http.MethodGet, unsplashAPI, nil)
if err != nil {
return "", err
}
res, err := getRes(req)
if err != nil {
return "", err
}
defer res.Body.Close()
// Unsplash Source API will redirect to the image
imgPath = res.Request.URL.String()
return imgPath, err
}
// Calls feh to set the wallpaper
func setWall(imgPath string) error {
feh, err := exec.LookPath("feh")
if err != nil {
fmt.Println("Error: feh is not in $PATH")
return err
}
fmt.Printf("Path to set as Wallpaper: %s\n", imgPath)
err = exec.Command(feh, "--bg-fill", imgPath).Run()
return err
}
func getRes(req *http.Request) (*http.Response, error) {
client := http.Client{
Timeout: time.Second * timeout,
}
res, err := client.Do(req)
return res, err
}
func errChk(err error) {
if err != nil {
log.Fatal(err)
}
}
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