go-site/cmd/web/handlers.go

package main

import (
	"fmt"
	"html/template"

	"net/http"
	"strconv"

	"github.com/gorilla/mux"

)

// Struct for torrent entry in 'New torrents' list 
type Entry struct {
	Num int
	Link string
}

type NewsItem struct {
	NewsText template.HTML
	Author string
	Time string
}

// indexHandler handels index page
func indexHandler(w http.ResponseWriter, r *http.Request) {
	data := struct {
		User     string
		Password string
		Title    string
		Items    []string
		Entrys 	 []Entry
		News 	 []NewsItem
	}{
		User:  "",
		Title: "My page",
		Items: []string{
			"My photos",
			"My blog",
			"More",
		},
	}

	session, _ := sessionsStore.Get(r, "session")

	untyped, ok := session.Values["username"]
	if ok {
		username, ok1 := untyped.(string)
		if ok1 {
			data.User = username
		}
	}

	untyped, ok2 := session.Values["password"]
	if ok2 {
		password, ok3 := untyped.(string)
		if ok3 {
			data.Password = password
		}
	}

	// fmt.Println(data.User)
	// fmt.Println(data.Password)

	// tindexTemplate, err := template.New("").ParseFiles(INDEX_TEMPLATE, "ui\\templates\\placeholder.html")

	tindexTemplate, err := template.New("").ParseFiles(NewIndexTemplate, TorrentEntry, TorrentList, NewsList, NewsEntry)

	
	if err != nil {
		fmt.Println("Error in templates loading")
		fmt.Println(err)
		w.Write([]byte("Internal server error"))
		return
	}

	data.Entrys = append(data.Entrys, Entry{Num: 54, Link: "/files/torrents/2torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 10, Link: "/files/torrents/1torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 23, Link: "/files/torrents/3torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 82, Link: "/files/torrents/4torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 12, Link: "/files/torrents/5torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 98, Link: "/files/torrents/6torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 18, Link: "/files/torrents/7torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 35, Link: "/files/torrents/8torrent.torrent"})
	data.Entrys = append(data.Entrys, Entry{Num: 4,  Link: "/files/torrents/9torrent.torrent"})


	news, _, err := dBConnector.GetLastNews(3)
	if err != nil {
		fmt.Println(err)
	}
	if err == nil {
		data.News = append(data.News, news...)
	}

	// LastTorrents, err := dBConnector.SelectTorrents(10)
	// if err != nil {
	// 	fmt.Println(err)
	// }
	// for _, torrent := LastTorrents  {
	//	torrentTopic, err := dBConnector.GetTorrentTopic(torrent.Hash)
	// 	if err != nil {
	// 		fmt.Println(err)
	// 		continue
	// 	}
	// 	torrentEntry := Entry{
	// 		Title:       torrentTopic.Title,
	// 		Desc:        torrentTopic.Desc,
	// 		TopicLink:   torrentTopic.Link,
	// 		Endorsments: torrent.Endors,
	// 		TorrentLink: GenTorrentLink(torrent.Hash),
	// 	}
	// 	data.Entrys = append(data.Entrys, torrentEntry)
	// }

	err = tindexTemplate.ExecuteTemplate(w, "newindex", data)
	if err != nil {
		fmt.Println(err)
		w.Write([]byte("Internal server error"))
	}
}

func indexPostHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Print("POST")
}

func logInGetHandler(w http.ResponseWriter, r *http.Request) {
	data := struct {
		Username string
		Password string
		Error    string
	}{
		Username: "",
		Password: "",
		Error:    "",
	}
	logInTemplate.Execute(w, data)
}

func logInPostHandler(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	username := r.PostForm.Get("username")
	password := r.PostForm.Get("password")
	fmt.Printf("Post from website! r.PostFrom = %v\n", r.PostForm)

	if dBConnector.LogIn(username, password) {

		session, _ := sessionsStore.Get(r, "session")
		session.Values["username"] = username
		session.Values["password"] = password

		session.Save(r, w)
		http.Redirect(w, r, "/", http.StatusFound)
	} else {
		data := struct {
			Username string
			Password string
			Error    string
		}{
			Username: username,
			Password: password,
			Error:    "Неверный логин либо пароль",
		}
		fmt.Printf("Login error")
		logInTemplate.Execute(w, data)
		// w.Write([]byte("Login error"))
	}

}

func logOutGetHandler(w http.ResponseWriter, r *http.Request) {
	session, _ := sessionsStore.Get(r, "session")
	session.Options.MaxAge = -1
	session.Save(r, w)

	untyped, ok := session.Values["username"]
	if ok {
		username, ok1 := untyped.(string)
		if ok1 {
			logger.Printf("User %s loged out", username)
		}
	}

	http.Redirect(w, r, "/", http.StatusFound)
}

func signInGetHandler(w http.ResponseWriter, r *http.Request) {
	signInTemplate.Execute(w, nil)
}

func signInPostHandler(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	username := r.PostForm.Get("username")
	password := r.PostForm.Get("password")
	passwordRepeat := r.PostForm.Get("password-repeat")

	data := struct {
		Username       string
		Password       string
		PasswordRepeat string
		Error          string
	}{
		Username:       username,
		Password:       password,
		PasswordRepeat: passwordRepeat,
		Error:          "",
	}

	if dBConnector.IsNameUsed(username) {
		data.Error = "Имя пользователя занято"
	} else {
		if password != passwordRepeat {
			data.Error = "Введенные пароли не совпадают"
		} else {
			if dBConnector.SigInUser(username, password) {

				session, _ := sessionsStore.Get(r, "session")
				session.Values["username"] = username
				session.Values["password"] = password
				session.Save(r, w)

				http.Redirect(w, r, "/", http.StatusFound)
			} else {
				data.Error = "Произошла внутреняя ошибка при регистрации нового пользователя"
			}
		}
	}
	signInTemplate.Execute(w, data)
}

func gameGetHandler(w http.ResponseWriter, r *http.Request) {
	gameTemplate.Execute(w, nil)
}

func gamePostHandler(w http.ResponseWriter, r *http.Request) { //TODO запись score в таблицу
	if err := r.ParseForm(); err != nil {
		fmt.Fprintf(w, "ParseForm() err: %v", err)
		return
	}
	fmt.Printf("Post from website! r.PostFrom = %v\n", r.PostForm)
	score_str := r.FormValue("score")
	fmt.Fprintf(w, "score = %s\n", score_str)
	fmt.Printf("score = %s\n", score_str)
	score_int, err := strconv.Atoi(score_str)
	if err != nil {
		// handle error
		fmt.Println(err)
		logger.Printf("Error extracting score from '%s'", score_str)
		// os.Exit(2)
	} else {
		dBConnector.SubmitScore(score_int)
	}
}

func DownloadTorrentHandler(w http.ResponseWriter, r *http.Request) {
	torrentHash := mux.Vars(r)["hash"]
	fmt.Println(r.URL)

	torrent, err := dBConnector.TakeTorrent(torrentHash)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("Torrent file not found"))
		return
	}

	if torrent.Deleted {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("The torrent file you are looking for has been deleted"))
		return
	}

	w.Header().Add("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s.torrent\"", torrent.Name))
	http.ServeFile(w, r, fmt.Sprintf("files/torrents/%s.torrent", torrent.Hash))
}