Da

const SammyHelpers = (function () {
    function _renderPage(templateName, addPartialsFunc, appendDataFunc) {
        addPartialsFunc && addPartialsFunc(TemplateLayout);

        this.loadPartials(
            TemplateLayout
        ).then(function () {
            const data = {
                userIsLogged: User.isLogged()
            };

            appendDataFunc && appendDataFunc(data);

            this.partial(templateName, data);
        });
    }

    function _calcTime(dateIsoFormat) {
        let diff = new Date - (new Date(dateIsoFormat));
        diff = Math.floor(diff / 60000);
        if (diff < 1) return 'less than a minute';
        if (diff < 60) return diff + ' minute' + pluralize(diff);
        diff = Math.floor(diff / 60);
        if (diff < 24) return diff + ' hour' + pluralize(diff);
        diff = Math.floor(diff / 24);
        if (diff < 30) return diff + ' day' + pluralize(diff);
        diff = Math.floor(diff / 30);
        if (diff < 12) return diff + ' month' + pluralize(diff);
        diff = Math.floor(diff / 12);
        return diff + ' year' + pluralize(diff);
        function pluralize(value) {
            if (value !== 1) return 's';
            else return '';
        }
    }

    function showHome() {
        if (User.isLogged()) {
            const ajaxFeed = User.getFeed();
            const ajaxChirps = User.getChirps();
            const ajaxFollowing = User.getFollowing();
            const ajaxFollowers = User.getFollowers();

            Promise.all([ajaxFeed, ajaxChirps, ajaxFollowing, ajaxFollowers])
                   .then(([feed, chirps, following, followers]) => {
                       feed.forEach(f => f['elapsedTime'] = _calcTime(f._kmd.ect));
                       _renderPage.call(this,
                                       TemplateConstants.path.home,
                                       (template) => {
                                           template.chirpForm = TemplateConstants.path.chirpForm;
                                       },
                                       (data) => {
                                        data['username'] = User.getUsername();
                                        data['feed'] = feed;
                                        data['chirps'] = chirps.length;
                                        data['following'] = following[0].subscriptions.length;
                                        data['followers'] = followers.length;
                                    });
                   });
        } else {
            _renderPage.call(this, TemplateConstants.path.loginForm);
        }
    }

    function showLogin() {
        _renderPage.call(this, TemplateConstants.path.loginForm);
    }

    function showRegister() {
        _renderPage.call(this, TemplateConstants.path.registerForm);
    }

    function showProfile(username, isMyProfile) {
        const ajaxFeed = User.getFeed(username);
        const ajaxChirps = User.getChirps(username);
        const ajaxFollowing = User.getFollowing(username);
        const ajaxFollowers = User.getFollowers(username);

        Promise.all([ajaxFeed, ajaxChirps, ajaxFollowing, ajaxFollowers])
                .then(([feed, chirps, following, followers]) => {
                    feed.forEach(f => {
                        f['elapsedTime'] = _calcTime(f._kmd.ect);
                        f['isMyProfile'] = isMyProfile;
                    });

                    const userId = chirps.length ? chirps[0]._acl.creator : '';
                    const subs = JSON.parse(User.getSubscriptions());
                    const isFollowed = Boolean(subs.find(u => u === username));
                    _renderPage.call(this,
                                    TemplateConstants.path.profile,
                                    (template) => {
                                        template.chirpForm = TemplateConstants.path.chirpForm;
                                    },
                                    (data) => {
                                        data['isMyProfile'] = isMyProfile;
                                        data['feed'] = feed;
                                        data['userId'] = userId;
                                        data['isFollowed'] = isFollowed;
                                        data['username'] = username;
                                        data['chirps'] = chirps.length;
                                        data['following'] = following[0].subscriptions.length;
                                        data['followers'] = followers.length;
                                });
                });
    }

    function showDiscover() {
        const authToken = User.getAuthToken();
        const self = this;
        const ajaxUsers = KinveyService.getAllUsers(authToken)
                                       .then(async function (users) {
                                           users = users.filter(u => u.username !== User.getUsername());
                                           const ajaxes = [];
                                           for (const user of users) {
                                               ajaxes.push(KinveyService.getFollowers(authToken, user.username));
                                           }

                                           Promise.all(ajaxes)
                                                  .then(function (followers) {
                                                     for (let index = 0; index < users.length; index++) {
                                                         const user = users[index];
                                                         user.followers = followers[index].length;
                                                     }

                                                     _renderPage.call(self, TemplateConstants.path.discover, null, (data) => data['users'] = users);
                                                  });

                                       });

    }

    function clearForm() {
        $(this.target).find('input[type=text], input[type=password], textarea').val('');
    }

    return {
        showHome,
        showLogin,
        showRegister,
        clearForm,
        showProfile,
        showDiscover
    }
})();