1 files changed, 105 insertions, 0 deletions
diff --git a/public/js/icinga/timezone.js b/public/js/icinga/timezone.js
new file mode 100644
index 0000000..1c2647b
--- /dev/null
+++ b/public/js/icinga/timezone.js
@@ -0,0 +1,105 @@
+/*! Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
+
+(function(Icinga, $) {
+
+    'use strict';
+
+    /**
+     * Get the maximum timezone offset
+     *
+     * @returns {Number}
+     */
+    Date.prototype.getStdTimezoneOffset = function() {
+        var year = new Date().getFullYear();
+        var offsetInJanuary = new Date(year, 0, 2).getTimezoneOffset();
+        var offsetInJune = new Date(year, 5, 2).getTimezoneOffset();
+
+        return Math.max(offsetInJanuary, offsetInJune);
+    };
+
+    /**
+     * Test for daylight saving time zone
+     *
+     * @returns {boolean}
+     */
+    Date.prototype.isDst = function() {
+        return this.getStdTimezoneOffset() !== this.getTimezoneOffset();
+    };
+
+    /**
+     * Write timezone information into a cookie
+     *
+     * @constructor
+     */
+    Icinga.Timezone = function() {
+        this.cookieName = 'icingaweb2-tzo';
+    };
+
+    Icinga.Timezone.prototype = {
+        /**
+         * Initialize interface method
+         */
+        initialize: function () {
+            this.writeTimezone();
+        },
+
+        destroy: function() {
+            // PASS
+        },
+
+        /**
+         * Write timezone information into cookie
+         */
+        writeTimezone: function() {
+            var date = new Date();
+            var timezoneOffset = (date.getTimezoneOffset()*60) * -1;
+            var dst = date.isDst();
+
+            if (this.readCookie(this.cookieName)) {
+                return;
+            }
+
+            this.writeCookie(this.cookieName, timezoneOffset + '-' + Number(dst), 1);
+        },
+
+        /**
+         * Write cookie data
+         *
+         * @param {String} name
+         * @param {String} value
+         * @param {Number} days
+         */
+        writeCookie: function(name, value, days) {
+            var expires = '';
+
+            if (days) {
+                var date = new Date();
+                date.setTime(date.getTime()+(days*24*60*60*1000));
+                var expires = '; expires=' + date.toGMTString();
+            }
+            document.cookie = name + '=' + value + expires + '; path=/';
+        },
+
+        /**
+         * Read cookie data
+         *
+         * @param {String} name
+         * @returns {*}
+         */
+        readCookie: function(name) {
+            var nameEq = name + '=';
+            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,c.length);
+                }
+                if (c.indexOf(nameEq) == 0) {
+                    return c.substring(nameEq.length,c.length);
+                }
+            }
+            return null;
+        }
+    };
+
+})(Icinga, jQuery);