补全查询日期时间段内的日期

var HandleContinuityDate = function (beginTime, endTime) {
    this.beginTime = beginTime;
    this.endTime = endTime;
}

//根据时间字符串计算时间戳
HandleContinuityDate.calcTimestamp = function (datestr) {
    var arr = datestr.split(" ");
    var date = arr[0];//日期
    var arr0 = date.split("-");
    var year = 2017, month = 0, day = 1;
    switch (arr0.length) {
        case 0:
            break;
        case 1:
            year = arr0[0];
            break;
        case 2:
            year = arr0[0], month = arr0[1] - 1;
            break;
        case 3:
            year = arr0[0], month = arr0[1] - 1, day = arr0[2];
            break;
    }
    return Date.parse(new Date(year, month, day)) / 1000;//秒
}

//时间戳转时间字符串
HandleContinuityDate.getLocalTime = function (nS) {
    var date = new Date(nS * 1000);//毫秒
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    month = month > 9 ? month : ("0" + month);
    var day = date.getDate();
    day = day > 9 ? day : ("0" + day);
    return year + "-" + month + "-" + day;
}

//获得连续时间
HandleContinuityDate.prototype.getContinuityDate = function () {
    var continuityDateArr = [];
    var beginTime = HandleContinuityDate.calcTimestamp(this.beginTime);
    var endTime = HandleContinuityDate.calcTimestamp(this.endTime);
    var everyDayNs = 60 * 60 * 24;
    var beginTimeEndTimeLength = (endTime - beginTime) / everyDayNs;
    continuityDateArr.push(this.beginTime);
    for (var i = 0; i < beginTimeEndTimeLength; i++) {
        beginTime += everyDayNs;
        if (beginTime >= endTime) {
            beginTime = HandleContinuityDate.getLocalTime(endTime);
            continuityDateArr.push(beginTime);
        } else {
            continuityDateArr.push(HandleContinuityDate.getLocalTime(beginTime));
        }
    }
    return continuityDateArr;
}
var date = new HandleContinuityDate("2017-02-27", "2018-03-31");
var continuit = date.getContinuityDate();
console.log(continuit);