package service import ( "context" "fmt" "mime/multipart" "net/http" "path" "github.com/gorilla/mux" ) var ( ctx = context.Background() cookieAge = "31536000" ) func NewHandler(s Service, staticDir string) http.Handler { r := mux.NewRouter() r.PathPrefix("/static").Handler(http.StripPrefix("/static", http.FileServer(http.Dir(path.Join(".", staticDir))))) r.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) { location := "/signin" sessionID, _ := req.Cookie("session_id") if sessionID != nil && len(sessionID.Value) > 0 { location = "/timeline" } w.Header().Add("Location", location) w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/signin", func(w http.ResponseWriter, req *http.Request) { err := s.ServeSigninPage(ctx, w) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/signin", func(w http.ResponseWriter, req *http.Request) { instance := req.FormValue("instance") url, sessionId, err := s.GetAuthUrl(ctx, instance) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Set-Cookie", fmt.Sprintf("session_id=%s;max-age=%s", sessionId, cookieAge)) w.Header().Add("Location", url) w.WriteHeader(http.StatusFound) }).Methods(http.MethodPost) r.HandleFunc("/oauth_callback", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) token := req.URL.Query().Get("code") _, err := s.GetUserToken(ctx, "", nil, token) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", "/timeline") w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/timeline", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) maxID := req.URL.Query().Get("max_id") sinceID := req.URL.Query().Get("since_id") minID := req.URL.Query().Get("min_id") err := s.ServeTimelinePage(ctx, w, nil, maxID, sinceID, minID) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/thread/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] reply := req.URL.Query().Get("reply") err := s.ServeThreadPage(ctx, w, nil, id, len(reply) > 1) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/like/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.Like(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")+"#status-"+id) w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/unlike/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.UnLike(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")+"#status-"+id) w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/retweet/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.Retweet(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")+"#status-"+id) w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/unretweet/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.UnRetweet(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")+"#status-"+id) w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) r.HandleFunc("/post", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) err := req.ParseMultipartForm(4 << 20) if err != nil { s.ServeErrorPage(ctx, w, err) return } content := getMultipartFormValue(req.MultipartForm, "content") replyToID := getMultipartFormValue(req.MultipartForm, "reply_to_id") visibility := getMultipartFormValue(req.MultipartForm, "visibility") isNSFW := "on" == getMultipartFormValue(req.MultipartForm, "is_nsfw") files := req.MultipartForm.File["attachments"] id, err := s.PostTweet(ctx, w, nil, content, replyToID, visibility, isNSFW, files) if err != nil { s.ServeErrorPage(ctx, w, err) return } location := "/timeline" + "#status-" + id if len(replyToID) > 0 { location = "/thread/" + replyToID + "#status-" + id } w.Header().Add("Location", location) w.WriteHeader(http.StatusFound) }).Methods(http.MethodPost) r.HandleFunc("/notifications", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) maxID := req.URL.Query().Get("max_id") minID := req.URL.Query().Get("min_id") err := s.ServeNotificationPage(ctx, w, nil, maxID, minID) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/user/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] maxID := req.URL.Query().Get("max_id") minID := req.URL.Query().Get("min_id") err := s.ServeUserPage(ctx, w, nil, id, maxID, minID) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/follow/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.Follow(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")) w.WriteHeader(http.StatusFound) }).Methods(http.MethodPost) r.HandleFunc("/unfollow/{id}", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) id, _ := mux.Vars(req)["id"] err := s.UnFollow(ctx, w, nil, id) if err != nil { s.ServeErrorPage(ctx, w, err) return } w.Header().Add("Location", req.Header.Get("Referer")) w.WriteHeader(http.StatusFound) }).Methods(http.MethodPost) r.HandleFunc("/about", func(w http.ResponseWriter, req *http.Request) { ctx := getContextWithSession(context.Background(), req) err := s.ServeAboutPage(ctx, w, nil) if err != nil { s.ServeErrorPage(ctx, w, err) return } }).Methods(http.MethodGet) r.HandleFunc("/signout", func(w http.ResponseWriter, req *http.Request) { // TODO remove session from database w.Header().Add("Set-Cookie", fmt.Sprintf("session_id=;max-age=0")) w.Header().Add("Location", "/") w.WriteHeader(http.StatusFound) }).Methods(http.MethodGet) return r } func getContextWithSession(ctx context.Context, req *http.Request) context.Context { sessionID, err := req.Cookie("session_id") if err != nil { return ctx } return context.WithValue(ctx, "session_id", sessionID.Value) } func getMultipartFormValue(mf *multipart.Form, key string) (val string) { vals, ok := mf.Value[key] if !ok { return "" } if len(vals) < 1 { return "" } return vals[0] }