com.tmathmeyer.sentinel.utils.Months.java Source code

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Here is the source code for com.tmathmeyer.sentinel.utils.Months.java

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/*******************************************************************************
 * Copyright (c) 2013 WPI-Suite
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Team YOCO (You Only Compile Once)
 ******************************************************************************/
package com.tmathmeyer.sentinel.utils;

import org.joda.time.DateTime;
import org.joda.time.MutableDateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

/**
 * Several handy methods related to DateTime calculations
 */
public class Months {
    /**
     * Used for Month and MiniMonth formatting
     */
    final public static DateTimeFormatter monthLblFormat = DateTimeFormat.forPattern("MMMM y");

    /**
     * 
     * @param year the year to test
     * @return whether the year provided is a leap year
     */
    @Deprecated
    public static boolean isLeapYear(int year) {
        if (year % 4 != 0)
            return false;
        if (year % 400 == 0)
            return true;
        if (year % 100 == 0)
            return false;
        return true;
    }

    /**
     * 
     * @param month the month's number (jan = 1, dec = 12)
     * @param year
     * @return the number of days in a given month in a given year
     */
    @Deprecated
    public static int getDaysInMonth(int month, int year) {
        if (month == 2)
            return 28 + (isLeapYear(year) ? 1 : 0);

        if ((month == 4) || (month == 6) || (month == 9) || (month == 11))
            return 30;

        else
            return 31;
    }

    /**
     * 
     * @param year they year
     * @param month the month
     * @param day the day
     * @return on which day of the week this date falls, ie: 1-sundae (mmmmm)
     *         2-monday
     */
    @Deprecated
    public static int getDayOfMonth(int year, int month, int day) {
        if (month < 3) {
            month += 12;
            year--;
        }
        int d = (day + 2 * month + (3 * (month + 1) / 5) + year + (year / 4) - (year / 100) + (year / 400) + 2) % 7;
        return (d == 0 ? 7 : d);

    }

    /**
     * 
     * @param year the year
     * @param month the month
     * @return the day (same format as getDayOfMonth)
     */
    @Deprecated
    public static int getStartingDay(int year, int month) {
        return Months.getDayOfMonth(year, month, 1);
    }

    public static DateTime nextMonth(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addMonths(1);
        return mdt.toDateTime();
    }

    public static DateTime prevMonth(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addMonths(-1);
        return mdt.toDateTime();
    }

    public static DateTime nextDay(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addDays(1);
        return mdt.toDateTime();
    }

    public static DateTime prevDay(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addDays(-1);
        return mdt.toDateTime();
    }

    public static DateTime nextWeek(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addDays(7);
        return mdt.toDateTime();
    }

    public static DateTime prevWeek(DateTime time) {
        MutableDateTime mdt = new MutableDateTime(time);
        mdt.addDays(-7);
        return mdt.toDateTime();
    }

    /**
     * 
     * @param d any DateTime
     * @return get's the Sundae of the provided day's week
     */
    public static DateTime getWeekStart(DateTime d) {
        MutableDateTime t = new MutableDateTime(d);
        t.addDays(-(d.getDayOfWeek() % 7));
        return t.toDateTime();
    }

    /**
     * adds descriptive letters to numbers: 1 -> 1st 2 -> 2nd 11 -> 11th etc
     * 
     * @param i the number to convert
     * @return a String
     */
    public static String getDescriptiveNumber(int i) {
        if (i % 100 < 20 && i % 100 > 10) {
            return i + "th";
        }

        if (i % 10 == 1) {
            return i + "st";
        }
        if (i % 10 == 2) {
            return i + "nd";
        }
        if (i % 10 == 3) {
            return i + "rd";
        }

        return i + "th";
    }

}