zulip/static/js/stream_create.js

var stream_create = (function () {

var exports = {};

var created_stream;

exports.reset_created_stream = function () {
    created_stream = undefined;
};

exports.set_name = function (stream) {
    created_stream = stream;
};

exports.get_name = function () {
    return created_stream;
};

var stream_name_error = (function () {
    var self = {};

    self.report_already_exists = function () {
        $("#stream_name_error").text(i18n.t("A stream with this name already exists"));
        $("#stream_name_error").show();
    };

    self.clear_errors = function () {
        $("#stream_name_error").hide();
    };

    self.report_empty_stream = function () {
        $("#stream_name_error").text(i18n.t("A stream needs to have a name"));
        $("#stream_name_error").show();
    };

    self.select = function () {
        $("#create_stream_name").focus().select();
    };

    self.pre_validate = function (stream_name) {
        // Don't worry about empty strings...we just want to call this
        // to warn users early before they start doing too much work
        // after they make the effort to type in a stream name.  (The
        // use case here is that I go to create a stream, only to find
        // out it already exists, and I was just too lazy to look at
        // the public streams that I'm not subscribed to yet.  Once I
        // realize the stream already exists, I may want to cancel.)
        if (stream_name && stream_data.get_sub(stream_name)) {
            self.report_already_exists();
            return;
        }

        self.clear_errors();
    };

    self.validate_for_submit = function (stream_name) {
        if (!stream_name) {
            self.report_empty_stream();
            self.select();
            return false;
        }

        if (stream_data.get_sub(stream_name)) {
            self.report_already_exists();
            self.select();
            return false;
        }

        // If we got this far, then we think we have a new unique stream
        // name, so we'll submit to the server.  (It's still plausible,
        // however, that there's some invite-only stream that we don't
        // know about locally that will cause a name collision.)
        return true;
    };

    return self;
}());

function ajaxSubscribeForCreation(stream_name, description, principals, invite_only, announce) {
    // Subscribe yourself and possible other people to a new stream.
    return channel.post({
        url: "/json/users/me/subscriptions",
        data: {subscriptions: JSON.stringify([{name: stream_name,
                                               description: description}]),
               principals: JSON.stringify(principals),
               invite_only: JSON.stringify(invite_only),
               announce: JSON.stringify(announce),
        },
        success: function () {
            $("#create_stream_name").val("");
            $("#create_stream_description").val("");
            $("#subscriptions-status").hide();
            loading.destroy_indicator($('#stream_creating_indicator'));
            // The rest of the work is done via the subscribe event we will get
        },
        error: function (xhr) {
            var msg = JSON.parse(xhr.responseText).msg;
            if (msg.indexOf('access') >= 0) {
                // If we can't access the stream, we can safely assume it's
                // a duplicate stream that we are not invited to.
                stream_name_error.report_already_exists(stream_name);
                stream_name_error.select();
            }

            // TODO: This next line does nothing.  See #4647.
            ui_report.error(i18n.t("Error creating stream"), xhr,
                            $("#subscriptions-status"), 'subscriptions-status');
            loading.destroy_indicator($('#stream_creating_indicator'));
        },
    });
}

// Within the new stream modal...
function update_announce_stream_state() {

    // If there is no notifications_stream, we simply hide the widget.
    if (!page_params.notifications_stream) {
        $('#announce-new-stream').hide();
        return;
    }

    // If the stream is invite only, or everyone's added, disable
    // the "Announce stream" option. Otherwise enable it.
    var announce_stream_checkbox = $('#announce-new-stream input');
    var disable_it = false;
    var is_invite_only = $('input:radio[name=privacy]:checked').val() === 'invite-only';

    if (is_invite_only) {
        disable_it = true;
        announce_stream_checkbox.prop('checked', false);
    } else {
        disable_it = $('#user-checkboxes input').length
                    === $('#user-checkboxes input:checked').length;
    }

    announce_stream_checkbox.prop('disabled', disable_it);
    $('#announce-new-stream').show();
}

function get_principals() {
    return _.map(
        $("#stream_creation_form input:checkbox[name=user]:checked"),
        function (elem) {
            return $(elem).val();
        }
    );
}

function create_stream() {
    var stream_name = $.trim($("#create_stream_name").val());
    var description = $.trim($("#create_stream_description").val());
    var is_invite_only = $('#stream_creation_form input[name=privacy]:checked').val() === "invite-only";
    var principals = get_principals();

    // You are always subscribed to streams you create.
    principals.push(people.my_current_email());

    created_stream = stream_name;

    var announce = (!!page_params.notifications_stream &&
        $('#announce-new-stream input').prop('checked'));

    loading.make_indicator($('#stream_creating_indicator'), {text: i18n.t('Creating stream...')});

    ajaxSubscribeForCreation(stream_name,
        description,
        principals,
        is_invite_only,
        announce
    );
}

exports.new_stream_clicked = function (stream_name) {
    // this changes the tab switcher (settings/preview) which isn't necessary
    // to a add new stream title.
    $(".display-type #add_new_stream_title").show();
    $(".display-type #stream_settings_title").hide();

    $(".stream-row.active").removeClass("active");