zotonic_mod_base

/**
 * Copyright 2018 The Cotonic Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS-IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


var cotonic = cotonic || {};

(function(cotonic) {
"use strict";

    function init() {
    }

    cotonic.broker.subscribe("model/document/get/+key",
        function(msg, bindings) {
            let value = {};
            switch (bindings.key) {
                case "all":
                    value = {
                        screen_width: window.screen.width,
                        screen_height: window.screen.height,
                        inner_width: window.innerWidth,
                        inner_height: window.innerHeight,
                        is_touch: is_touch_device(),
                        timezone: timezone_info(),
                        language: language_info()
                    };
                    break;
                case "intl":
                    value = {
                        timezone: timezone_info(),
                        language: language_info()
                    };
                    break;
                default:
                    value = null;
                    break;
            }
            if(msg.properties.response_topic) {
                cotonic.broker.publish(msg.properties.response_topic, value);
            }
        }
    );

    // Used to fetch z.tz and z.lang cookies

    cotonic.broker.subscribe("model/document/get/cookie/+key",
        function(msg, bindings) {
            if(msg.properties.response_topic) {
                cotonic.broker.publish(msg.properties.response_topic, getCookie(bindings.key));
            }
        }
    );

    cotonic.broker.subscribe("model/document/post/cookie/+key",
        function(msg, bindings) {
            setCookie(bindings.key, msg.payload.value, msg.payload.exdays);
            if(msg.properties.response_topic) {
                cotonic.broker.publish(msg.properties.response_topic, getCookie(bindings.key));
            }
        }
    );

    function getCookie(cname) {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for(var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') {
                c = c.substring(1);
            }
            if (c.indexOf(name) == 0) {
                return c.substring(name.length, c.length);
            }
        }
        return "";
    }

    function setCookie(cname, cvalue, exdays) {
        var d = new Date();
        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
        var expires = "expires="+d.toUTCString();
        document.cookie = cname + "=" + cvalue + "; " + expires + "; path=/; Secure; SameSite=None";
    }

    // TODO: handle case of fixed/guessed timezone
    function timezone_info() {
        return {
            cookie: getCookie("z.tz"),
            user_agent: timezone()
        };
    }

    function language_info() {
        return {
            cookie: getCookie("z.lang"),
            user_agent: navigator.language,
            document: document.body.parentElement.getAttribute("lang")
        };
    }

    // Return the timezone of the browser, return null if none could be determined
    function timezone() {
        if (typeof Intl === "object" && typeof Intl.DateTimeFormat === "function") {
            let options = Intl.DateTimeFormat().resolvedOptions();
            if (typeof options === "object" && options.timeZone) {
                return options.timeZone;
            }
        }
        if (typeof window.jstz === "object") {
            return window.jstz.determine().name();
        }
        if (typeof window.moment === "object" && typeof window.moment.tz === "function") {
            return window.moment.tz();
        }
        return null;
    }

    function is_touch_device() {
        var prefixes = ' -webkit- -moz- -o- -ms- '.split(' ');
        var mq = function(query) {
            return window.matchMedia(query).matches;
        };
        if (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
            return true;
        }
        var query = ['(', prefixes.join('touch-enabled),('), 'heartz', ')'].join('');
        return mq(query);
    }

    init();

}(cotonic));