Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.Calendar;

import java.util.Date;
import java.util.HashMap;

public class Main {
    public static HashMap<Integer, HashMap<Integer, Integer>> getAvailableTime(HashMap<Date, Date> bookedTimes,
            Date date) {
        HashMap<Integer, HashMap<Integer, Integer>> availableTime = createFullAvailableTime();

        HashMap<Date, Date> bookedTimeInOneDate = getBookedTimeInOneDate(bookedTimes, date);
        Calendar startCalendar = Calendar.getInstance();
        Calendar endCalendar = Calendar.getInstance();
        for (Date keyBooked : bookedTimeInOneDate.keySet()) {
            startCalendar.setTime(keyBooked);
            int startHour = startCalendar.get(Calendar.HOUR_OF_DAY);
            for (int hourIndex = 0; hourIndex < 24; hourIndex++) {

                if (hourIndex == startHour) {
                    int startMinute = startCalendar.get(Calendar.MINUTE);
                    int endMinute;

                    endCalendar.setTime(bookedTimeInOneDate.get(keyBooked));

                    int endHour = endCalendar.get(Calendar.HOUR_OF_DAY);

                    //startHour = endHour = hourIndex
                    if (endHour == hourIndex) {
                        endMinute = endCalendar.get(Calendar.MINUTE);
                        removeMinute(startMinute, endMinute, hourIndex, availableTime);
                    }
                    //startHour = hourIndex != endHour
                    else {
                        for (int i = hourIndex; i < endHour + 1; i++) {
                            if (i == hourIndex) {
                                if (startMinute == 0) {
                                    availableTime.remove(startHour);
                                } else {
                                    removeMinute(startMinute, 59, hourIndex, availableTime);
                                }

                            } else if (i == endHour) {

                                endMinute = endCalendar.get(Calendar.MINUTE);
                                if (endMinute == 59) {
                                    availableTime.remove(endHour);
                                } else {
                                    removeMinute(0, endMinute, endHour, availableTime);
                                }

                            } else {

                                availableTime.remove(i);
                            }
                        }
                    }
                }
            }
        }
        return availableTime;
    }

    private static HashMap<Integer, HashMap<Integer, Integer>> createFullAvailableTime() {
        HashMap<Integer, HashMap<Integer, Integer>> availableTime = new HashMap<>();
        for (int hour = 0; hour < 24; hour++) {
            HashMap<Integer, Integer> minutes = new HashMap<>(60);
            for (int minute = 0; minute < 60; minute++) {
                minutes.put(minute, minute);
            }

            availableTime.put(hour, minutes);
        }
        return availableTime;
    }

    private static HashMap<Date, Date> getBookedTimeInOneDate(HashMap<Date, Date> bookedTimes, Date date) {
        HashMap<Date, Date> result = new HashMap<>();
        for (Date key : bookedTimes.keySet()) {
            if (isSameDay(key, date)) {
                result.put(key, bookedTimes.get(key));
            }
        }
        return result;
    }

    private static HashMap<Integer, HashMap<Integer, Integer>> removeMinute(int startMinute, int endMinute,
            int keyHour, HashMap<Integer, HashMap<Integer, Integer>> hashMap) {
        HashMap<Integer, Integer> values = hashMap.get(keyHour);
        for (int i = startMinute; i < endMinute + 1; i++) {
            values.remove(i);
        }
        //        hashMap.remove(keyHour);
        //        hashMap.put(keyHour, values);
        return hashMap;
    }

    public static boolean isSameDay(Date date1, Date date2) {
        Calendar cal1 = Calendar.getInstance();
        Calendar cal2 = Calendar.getInstance();
        cal1.setTime(date1);
        cal2.setTime(date2);
        boolean sameDay = cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
                && cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR);

        return sameDay;
    }
}