api calls.java

    @GET("/users/{username}/exists")
    Observable<Response<Boolean>> userExist(@Path("username") String username);

    @POST("/users")
    Observable<Response<Void>> signup(@Body User user);

    @POST("/login")
    Observable<Response<Void>> login(@Body User user);

    @POST("/logout")
    Single<Response<Void>> logout();

    @GET("/user/{username}")
    Observable<Response<Profile>> userProfile(@Path("username") String username);

    @GET("/user/{username}")
    Call<Profile> userProfileSync(@Path("username") String username);

    @POST("/invite/{friendName}")
    Observable<Response<ResponseBody>> inviteFriend(@Path("friendName") String friendName);

    @GET("/friends")
    Observable<Response<FriendResponse>> friends();

    @Multipart
    @POST("/user/{username}/{version}/setPhoto")
    Observable<Response<Void>> setUserPhoto(@Path("username") String username, @Path("version") String version, @Part MultipartBody.Part file);

    @POST("/user/{username}/setName")
    Observable<Response<Void>> setUserName(@Path("username") String username, @Body SetNameRequest name);

    @GET("/publickeys/{username}")
    Call<PublicKeyData> getPublicKeys(@Path("username") String username);

    @POST("/optdata/{userControlId}")
    Observable<Response<ConversationResponse>> getData(@Path("userControlId") String controlId);

    @POST("/invites/{friendName}/{action}")
    Observable<Response<Void>> respondToInvite(@Path("friendName") String friendName, @Path("action") String action);

    @GET("/messagesopt/{username}/before/{messageId}")
    Call<List<Message>> getMessages(@Path("username") String username, @Path("messageId") String messageId);

    @DELETE("/friends/{friendName}")
    Observable<Response<ResponseBody>> deleteFriend(@Path("friendName") String friendName);

    @DELETE("/messagesutai/{username}/{messageId}")
    Observable<Response<ResponseBody>> deleteAllMessages(@Path("username") String username, @Path("messageId") String lastMessageId);

    @DELETE("/messages/{username}/{messageId}")
    Observable<Response<ResponseBody>> deleteMessage(@Path("username") String username, @Path("messageId") String messageId);

    @Multipart
    @POST("/images/{usernameVersion}/{friendName}/{friendVersion}")
    Call<ResponseBody> uploadPhotoSync(@Path("usernameVersion") String currentUserVersion,
                                                   @Path("friendName") String friendName,
                                                   @Path("friendVersion") String friendVersion,
                                                   @Part MultipartBody.Part file);

    @POST("/registergcm")
    Observable<Response<ResponseBody>> updatePushNotificationToken(@Body TokenUpdateRequest tokenData);


    @GET
    Observable<Response<ResponseBody>> downloadFile(@Url String fileUrl);