init

tools/date.tool.js

@@ -0,0 +1,65 @@
+var DateTool = {};
+
+// -------- Date & timestamp -------
+DateTool.isDate = function(date)
+{
+    if (Object.prototype.toString.call(date) === "[object Date]") {
+        return !isNaN(date.getTime());
+    }
+    return false;  
+};
+
+DateTool.tagToDate = function(tag)
+{
+    if(typeof tag !== "string")
+        return null;
+
+    [year, month, day] = tag.split("-");
+    var d = new Date(year, month - 1, day, 0, 0, 0, 0);
+    return  DateTool.isDate(d) ? d : null;  
+};
+
+DateTool.dateToTag = function(d)
+{
+    if(!DateTool.isDate(d))
+        return "";
+
+    var year = '' + d.getFullYear();
+    var month = '' + (d.getMonth() + 1);
+    var day = '' + d.getDate();
+    if (day.length < 2) day = '0' + day;
+    return [year, month, day].join('-');
+};
+
+DateTool.getStartOfDay = function(date){
+    return new Date(date.getFullYear(), date.getMonth(), date.getDate());
+}
+
+DateTool.addDays = function(date, days) {
+    return new Date(date.getTime() + days*24*60*60*1000);
+}
+
+DateTool.addHours = function(date, hours) {
+    return new Date(date.getTime() + hours*60*60*1000);
+}
+
+DateTool.addMinutes = function(date, minutes) {
+    return new Date(date.getTime() + minutes*60000);
+}
+
+DateTool.minDate = function()
+{
+    return new Date(-8640000000000000);
+}
+
+DateTool.maxDate = function()
+{
+    return new Date(8640000000000000);
+}
+
+DateTool.countDays = function(from, to) {
+    const ms_per_day = 1000 * 60 * 60 * 24;
+    return Math.round((to - from) / ms_per_day);
+}
+
+module.exports = DateTool;