bob-gray/solv

/* istanbul ignore if */
if (typeof define !== "function") {
    var define = require("amdefine")(module);
}

define(function (require) {
    "use strict";

    require("../class/method");

    var meta = require("../meta"),
        type = require("../type"),
        util = require("./util"),
        movers;

    /*meta({
        "name": "Date",
        "type": "class",
        "global": true
    })

    meta({
        "name": "Date Part",
        "type": "Specification",
        "d": "day",
        "m": "month",
        "y": "year",
        "q": "quarter",
        "w": "week",
        "h": "hour",
        "M": "minute",
        "s": "second",
        "l": "millisecond"
    })*/

    Date.method(
        meta({
            "name": "move",
            "description": "Alters a date, moving it by amount",
            "arguments": [{
                "name": "amount",
                "type": "number",
                "description": "Amount to move the date by. A positive or negative integer."
            }, {
                "name": "part",
                "type": "string",
                "description": "The part of the date to move. See Date Part."
            }]
        }),
        move
    );

    function move (amount, part) {
        movers[part](this, amount);
    }

    movers = {
        "d": function (date, amount) {
            var day = date.getDate(),
                newDay = day + amount;

            date.setDate(newDay);
        },

        "w": function (date, amount) {
            this.d(date, amount * util.DAYS_IN_WEEK);
        },

        "m": function (date, amount) {
            var month = date.getMonth(),
                newMonth = month + amount;

            date.setMonth(newMonth);
        },

        "q": function (date, amount) {
            this.m(date, amount * util.MONTHS_IN_QUARTER);
        },

        "y": function (date, amount) {
            var year = date.getFullYear(),
                newYear = year + amount;

            date.setFullYear(newYear);
        },

        "h": function (date, amount) {
            var hour = date.getHours(),
                newHour = hour + amount;

            date.setHours(newHour);
        },

        "M": function (date, amount) {
            var minute = date.getMinutes(),
                newMinute = minute + amount;

            date.setMinutes(newMinute);
        },

        "s": function (date, amount) {
            var second = date.getSeconds(),
                newSecond = second + amount;

            date.setSeconds(newSecond);
        },

        "l": function (date, amount) {
            var millisecond = date.getMilliseconds(),
                newMillisecond = millisecond + amount;

            date.setMilliseconds(newMillisecond);
        }
    };
});