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|
package main
import (
"encoding/json"
"errors"
"flag"
"fmt"
"html/template"
"log"
"net/http"
"os"
"path"
"strings"
"github.com/silvasur/startpage/reddit_background"
"github.com/silvasur/startpage/weather"
)
var tpl *template.Template
func loadTemplateFromDir(templateDir string) error {
var err error
tpl, err = template.ParseFiles(path.Join(templateDir, "template.html"))
if err != nil {
return fmt.Errorf("Could not load template from '%s': %w", templateDir, err)
}
return nil
}
func loadTemplateFromGoPath() error {
gopaths := strings.Split(os.Getenv("GOPATH"), ":")
for _, p := range gopaths {
var err error
tpl, err = template.ParseFiles(
path.Join(p, "src", "github.com", "silvasur", "startpage", "templates", "template.html"),
)
if err == nil {
return nil
}
}
return errors.New("could not find template in $GOPATH/src/github.com/silvasur/startpage")
}
func loadTemplate(templateDir string) error {
if templateDir != "" {
return loadTemplateFromDir(templateDir)
} else {
return loadTemplateFromGoPath()
}
}
func buildWeatherProvider(config Config) *weather.WeatherProvider {
if config.WeatherPlace == "" {
return nil
}
return weather.NewWeatherProvider(config.WeatherPlace)
}
func buildRedditImageProvider(config Config) *reddit_background.RedditImageProvider {
subreddit := config.ImageSubreddit
if subreddit == "" {
subreddit = "EarthPorn"
}
return reddit_background.NewRedditImageProvider(config.GetBackgroundMaxdim(), subreddit)
}
func main() {
laddr := flag.String("laddr", ":25145", "Listen on this port")
templateDir := flag.String("template-dir", "", "Search for templates in this directory instead of default")
flag.Parse()
if err := loadTemplate(*templateDir); err != nil {
log.Fatalf("Failed loading template: %s", err)
}
config, err := LoadConfig()
if err != nil {
log.Fatalf("Failed loading config: %s", err)
}
redditImageProvider := buildRedditImageProvider(*config)
http.HandleFunc("/", startpage(*config, redditImageProvider))
http.HandleFunc("/bgimg", bgimg(redditImageProvider))
http.HandleFunc("/update-bgimg", updateBgimg(redditImageProvider))
if config.BackgroundSavepath != "" {
http.HandleFunc("/savebg", savebg(redditImageProvider, config.BackgroundSavepath))
}
log.Fatal(http.ListenAndServe(*laddr, nil))
}
type TplData struct {
BgImage *reddit_background.RedditImageForAjax
Weather *weather.Weather
Links []Link
CanSaveBg bool
}
func startpage(config Config, redditImageProvider *reddit_background.RedditImageProvider) http.HandlerFunc {
weatherProvider := buildWeatherProvider(config)
return func(rw http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
var curWeather *weather.Weather = nil
if weatherProvider != nil {
var err error
if curWeather, err = weatherProvider.CurrentWeather(); err != nil {
log.Printf("Failed getting weather: %s", err)
}
}
if err := tpl.Execute(rw, &TplData{
redditImageProvider.Image().ForAjax(),
curWeather,
config.Links,
config.BackgroundSavepath != "",
}); err != nil {
log.Printf("Failed executing template: %s\n", err)
}
}
}
func bgimg(redditImageProvider *reddit_background.RedditImageProvider) http.HandlerFunc {
return func(rw http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
image := redditImageProvider.Image()
if image == nil || len(image.Data) == 0 {
rw.WriteHeader(http.StatusNotFound)
}
rw.Header().Add("Content-Type", image.Mediatype)
if _, err := rw.Write(image.Data); err != nil {
log.Printf("Failed serving background: %s", err)
}
}
}
func updateBgimg(redditImageProvider *reddit_background.RedditImageProvider) http.HandlerFunc {
return func(rw http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
updated := redditImageProvider.UpdateImage()
rw.Header().Set("Content-Type", "application/json")
json.NewEncoder(rw).Encode(struct {
Updated bool
Image *reddit_background.RedditImageForAjax
}{
updated,
redditImageProvider.Image().ForAjax(),
})
}
}
func savebg(redditImageProvider *reddit_background.RedditImageProvider, savepath string) http.HandlerFunc {
return func(rw http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
image := redditImageProvider.Image()
if image == nil || len(image.Data) == 0 {
fmt.Fprintln(rw, "No background image available")
return
}
if err := image.Save(savepath); err != nil {
log.Println(err)
fmt.Fprintln(rw, err)
}
rw.Header().Add("Location", "/")
rw.WriteHeader(http.StatusFound)
}
}
|
