/**
* Returns a specific employee's free days on a specific week.
*
* <p>Saturday and Sunday cannot be day off.
*
* <p>Work day is overwritten by the day off, sick days are also, <b>unless it's weekend, then it
* will not count as neither work day/sick day nor day off</b>
*
* @param id the employee's id
* @param date the date that provides the week (can be any day on that week) we want to analyze
* @return the number of free days
*/
public static int getDayOffsOnAWeekByEmployeeId(int id, Date date) {
LocalDate startDate = new LocalDate(date);
int dayOfWeek = startDate.getDayOfWeek();
startDate = startDate.minusDays(dayOfWeek - 1);
LocalDate endDate = startDate.plusDays(6);
List<WorkSession> sickDaysTemp = new ArrayList<>();
List<WorkSession> dayOffsTemp = new ArrayList<>();
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement(
"select session_date, type, sum(duration) duration from worksessions"
+ " where employee_id = ? and session_date between ? and ? group by session_date, type")) {
pstmt.setInt(1, id);
pstmt.setDate(2, new Date(startDate.toDate().getTime()));
pstmt.setDate(3, new Date(endDate.toDate().getTime()));
try (ResultSet rset = pstmt.executeQuery()) {
int temp_id = 1;
while (rset.next()) {
WorkSession ws =
new WorkSession(
temp_id++,
id,
rset.getDate("session_date"),
(short) rset.getInt("duration"),
rset.getString("type"));
switch (ws.getType()) {
case WORK:
break;
case SICKNESS:
sickDaysTemp.add(ws);
break;
case DAY_OFF:
dayOffsTemp.add(ws);
break;
default:
break;
}
}
}
} catch (SQLException | IOException e) {
logger.error("Error while getting dayoffs on a week by employeeid", e);
throw new PersistentLayerException(e);
}
List<WorkSession> dayOffs = new ArrayList<>();
for (WorkSession dayOff : dayOffsTemp) {
LocalDate ldate = new LocalDate(dayOff.getDate());
if (ldate.getDayOfWeek() < 6) {
dayOffs.add(dayOff);
}
}
return dayOffs.size();
}
/**
* Returns the number of specific employee's worked days in the current year.
*
* <p>Work days are overwritten by sick days.
*
* <p>Sick days are overwritten by days taken off.
*
* @param id the employee's id
* @return the number of worked days
*/
public static int getAllWorkedDayCurrentYearByEmployeeId(int id) {
List<WorkSession> workDaysTemp = new ArrayList<>();
List<WorkSession> sickDaysTemp = new ArrayList<>();
List<WorkSession> dayOffsTemp = new ArrayList<>();
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement(
"select session_date, type from worksessions"
+ " where employee_id = ? and to_char(session_date, 'YYYY') = to_char(sysdate, 'YYYY') group by session_date, type")) {
pstmt.setInt(1, id);
try (ResultSet rset = pstmt.executeQuery()) {
int temp_id = 1;
while (rset.next()) {
WorkSession ws =
new WorkSession(
temp_id++, id, rset.getDate("session_date"), (short) 8, rset.getString("type"));
switch (ws.getType()) {
case WORK:
workDaysTemp.add(ws);
break;
case SICKNESS:
sickDaysTemp.add(ws);
break;
case DAY_OFF:
dayOffsTemp.add(ws);
break;
default:
break;
}
}
}
} catch (SQLException | IOException e) {
logger.error("error while retrieving worked days in current year", e);
throw new PersistentLayerException(e);
}
List<WorkSession> workDays = new ArrayList<>();
for (WorkSession workDay : workDaysTemp) {
boolean contains = false;
for (WorkSession sickDay : sickDaysTemp) {
if (workDay.getDate().equals(sickDay.getDate())) {
contains = true;
}
}
for (WorkSession dayOff : dayOffsTemp) {
if (workDay.getDate().equals(dayOff.getDate())) {
contains = true;
}
}
if (!contains) {
workDays.add(workDay);
}
}
return workDays.size();
}
/**
* Returns the number of a specific employee's free days in a specific month.
*
* <p>Work days are overwritten by sick days unless it's weekend, then it's not counted for
* anywhere.
*
* <p>Sick days are overwritten by free days unless it's weekend, then it's not counted for
* anywhere.
*
* @param id the employee's id
* @param date the month (can be any of the month's day) we want to analyze
* @return the number of the employee's days taken off (only weekdays)
*/
public static int getDayOffsInAMonthByEmployeeId(int id, Date date) {
List<WorkSession> dayOffsTemp = new ArrayList<>();
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement(
"select session_date, type from worksessions"
+ " where employee_id = ? and to_char(session_date, 'YYYY.MM') = to_char(?, 'YYYY.MM') group by session_date, type")) {
pstmt.setInt(1, id);
pstmt.setDate(2, date);
try (ResultSet rset = pstmt.executeQuery()) {
int temp_id = 1;
while (rset.next()) {
WorkSession ws =
new WorkSession(
temp_id++, id, rset.getDate("session_date"), (short) 8, rset.getString("type"));
switch (ws.getType()) {
case DAY_OFF:
dayOffsTemp.add(ws);
break;
default:
break;
}
}
}
} catch (SQLException | IOException e) {
logger.error("Error while retrieving dayoffs in a month by employeeid", e);
throw new PersistentLayerException(e);
}
List<WorkSession> dayOffs = new ArrayList<>();
for (WorkSession dayOff : dayOffsTemp) {
LocalDate ldate = new LocalDate(dayOff.getDate());
if (ldate.getDayOfWeek() < 6) {
dayOffs.add(dayOff);
}
}
return dayOffs.size();
}
/**
* Returns the salary earned by a specific {@code Employee}'s id in a specific month.
*
* <p>Work days are overwritten by sick days.
*
* <p>Sick days are overwritten by free days.
*
* <p>If a sick day is on weekend then it does not get into the final salary.
*
* <p>If a day off is on weekend then it does not get into the final salary.
*
* <p>Salary is retrieved from the database. That's the base salary.
*
* <p>Base salary is for 20 worked days, with 8 hours per day.
*
* <p>Sick days, and days taken off have the same hourly rate as worked days.
*
* <p>Sick days, and days taken off are counted with 8 hours per day.
*
* <p>If a person does overtime (over 8 hours per day), then the plus hours' rate has a 1.5x
* multiplier.
*
* <p>If a person works on Saturday, then the hour rate has 1.5x multiplier. Overtime is not
* counted on these days.
*
* <p>If a person works on Sunday, then the hour rate has 2x multiplier. Overtime is not counted
* on these days.
*
* <p>If a person starts working on a weekend day, and then he gets sick or decides to go
* home(take a day off), then the day is not counted as work day, neither sick day nor free day.
*
* <p><b>Rules</b>
*
* <ul>
* <li>A person should work more than 4 hours per every work day on weekdays. After 10 work day
* with less equals than 4 hours per work day, the program throws an exception which
* indicates this.
* <li>A person should work more than 40 hours per week. If he doesn't apply to this
* expectations an exception is thrown, which indicates this.
* <li>A person should work more than 160 hours per month. If he doesn't apply to this
* expectations an exception is thrown, which indicates this.
* </ul>
*
* <p>{@code SalaryException} collects these rule breaks. If any of these rules are broken, the
* exception will be thrown. This exception will contain the salary, and the error messages.
*
* @see SalaryException
* @param id the employee's id
* @param date the date of the month (can be given any of the month's days) we want to analyze
* @return the employee's salary in the specific month
* @throws SalaryException if the rules above are broken
*/
public static BigDecimal getSalaryInAMonthByEmployeeId(int id, Date date) throws SalaryException {
List<WorkSession> workDaysTemp = new ArrayList<>();
List<WorkSession> sickDaysTemp = new ArrayList<>();
List<WorkSession> dayOffsTemp = new ArrayList<>();
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement(findWorkSessionsInAMonthWithATypeByEmployeeId)) {
pstmt.setInt(1, id);
pstmt.setDate(2, date);
try (ResultSet rset = pstmt.executeQuery()) {
int temp_id = 1;
while (rset.next()) {
WorkSession ws =
new WorkSession(
temp_id++,
id,
rset.getDate("session_date"),
(short) rset.getInt("duration"),
rset.getString("type"));
switch (ws.getType()) {
case WORK:
workDaysTemp.add(ws);
break;
case SICKNESS:
sickDaysTemp.add(ws);
break;
case DAY_OFF:
dayOffsTemp.add(ws);
break;
default:
break;
}
}
}
} catch (SQLException | IOException e) {
logger.error("Error while getting worksessions for calculating salary", e);
throw new PersistentLayerException(e);
}
List<WorkSession> workDays = new ArrayList<>();
List<WorkSession> sickDays = new ArrayList<>();
List<WorkSession> dayOffs = new ArrayList<>();
for (WorkSession workDay : workDaysTemp) {
boolean contains = false;
for (WorkSession sickDay : sickDaysTemp) {
if (workDay.getDate().equals(sickDay.getDate())) {
contains = true;
}
}
for (WorkSession dayOff : dayOffsTemp) {
if (workDay.getDate().equals(dayOff.getDate())) {
contains = true;
}
}
if (!contains) {
workDays.add(workDay);
}
}
for (WorkSession sickDay : sickDaysTemp) {
boolean contains = false;
for (WorkSession dayOff : dayOffsTemp) {
if (sickDay.getDate().equals(dayOff.getDate())) {
contains = true;
}
}
LocalDate ldate = new LocalDate(sickDay.getDate());
if (!contains && ldate.getDayOfWeek() < 6) {
sickDays.add(sickDay);
}
}
for (WorkSession dayOff : dayOffsTemp) {
LocalDate ldate = new LocalDate(dayOff.getDate());
if (ldate.getDayOfWeek() < 6) {
dayOffs.add(dayOff);
}
}
StringBuilder sb = new StringBuilder();
int lessThanFourHourWorkDayCount = 0;
for (WorkSession workDay : workDays) {
LocalDate ldate = new LocalDate(workDay.getDate());
if (workDay.getDuration() <= 4
&& ldate.getDayOfWeek() < 6) { // worked less than 4 hour on a weekday
lessThanFourHourWorkDayCount++;
}
}
if (lessThanFourHourWorkDayCount > 10) {
sb = sb.append("Day expectation (4h/Day) BROKEN\n");
}
Map<Integer, Integer> map = new HashMap<>();
LocalDate startOfMonth = new LocalDate(date.getTime());
startOfMonth = startOfMonth.minusDays(startOfMonth.getDayOfMonth() - 1);
LocalDate endOfMonth = startOfMonth.plusMonths(1);
endOfMonth = endOfMonth.minusDays(1);
int startWeek = startOfMonth.getWeekOfWeekyear();
int endWeek = endOfMonth.getWeekOfWeekyear();
while (startWeek <= endWeek) {
map.put(startWeek, 0);
startWeek++;
}
for (WorkSession workDay : workDays) {
LocalDate ldate = new LocalDate(workDay.getDate());
int weekWorkHours =
getWorkedHoursOnAWeekByEmployeeId(workDay.getEmployee_id(), workDay.getDate());
map.put(ldate.getWeekOfWeekyear(), weekWorkHours);
}
boolean XWorkHourPerWeekWarn = false;
int count = 0;
for (Entry<Integer, Integer> entry : map.entrySet()) {
if (entry.getValue() < 40) {
XWorkHourPerWeekWarn = true;
count++;
}
}
if (XWorkHourPerWeekWarn) {
sb = sb.append("Week expectation (40h/Week) BROKEN\n");
}
int sumWorkedHours = 0;
for (WorkSession workDay : workDays) {
sumWorkedHours += workDay.getDuration();
}
if (sumWorkedHours < 160) {
sb = sb.append("Month expectation (160h/Month) BROKEN\n");
}
BigDecimal baseSalary = new BigDecimal(0);
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement("select salary from employees where employee_id = ?")) {
pstmt.setInt(1, id);
try (ResultSet rset = pstmt.executeQuery()) {
if (rset.next()) {
baseSalary = rset.getBigDecimal("salary");
}
}
} catch (SQLException | IOException e) {
logger.error("error while retrieving baseSalary in calculating salary", e);
throw new PersistentLayerException(e);
}
baseSalary = baseSalary.divide(new BigDecimal(20)).divide(new BigDecimal(8));
// sickday's count * 8 hour
BigDecimal salary =
baseSalary.multiply(new BigDecimal(8)).multiply(new BigDecimal(sickDays.size()));
// dayoff's count * 8 hour
salary =
salary.add(baseSalary.multiply(new BigDecimal(8)).multiply(new BigDecimal(dayOffs.size())));
for (WorkSession workSession : workDays) {
LocalDate ldate = new LocalDate(workSession.getDate());
if (ldate.getDayOfWeek() < 6) { // weekdays
if (workSession.getDuration() <= 8) { // no plus hours
salary = salary.add(baseSalary.multiply(new BigDecimal(workSession.getDuration())));
} else { // plus hours
short plusHours = (short) (workSession.getDuration() - 8);
salary = salary.add(baseSalary.multiply(new BigDecimal(8))); // normal hours
salary =
salary.add(
baseSalary
.multiply(new BigDecimal(1.5))
.multiply(new BigDecimal(plusHours))); // plus hours
}
} else { // saturday & sunday
if (ldate.getDayOfWeek() == 6) { // saturday 1.5x multiplier
salary =
salary.add(
baseSalary
.multiply(new BigDecimal(1.5))
.multiply(new BigDecimal(workSession.getDuration())));
} else if (ldate.getDayOfWeek() == 7) { // sunday 2x multiplier
salary =
salary.add(
baseSalary
.multiply(new BigDecimal(2))
.multiply(new BigDecimal(workSession.getDuration())));
}
}
}
try {
return salary;
} finally {
if (sb.length() > 0) {
logger.info("id=" + id + ", employee has problems with expectations: \n" + sb.toString());
throw new SalaryException(salary, sb.toString());
}
}
}
/**
* Returns the number of a specific employee's worked hours in a specific month.
*
* @param id the employee's id
* @param date the date that provides the month (can be any day in that month) we want to analyze
* @return the number of hours worked in that month
*/
public static int getWorkedHoursInAMonthByEmployeeId(int id, Date date) {
LocalDate startOfMonth = new LocalDate(date);
startOfMonth = startOfMonth.minusDays(startOfMonth.getDayOfMonth() - 1);
LocalDate endOfMonth = startOfMonth.plusMonths(1).minusDays(1);
List<WorkSession> workDaysTemp = new ArrayList<>();
List<WorkSession> sickDaysTemp = new ArrayList<>();
List<WorkSession> dayOffsTemp = new ArrayList<>();
try (PreparedStatement pstmt =
ConnectionHelper.getConnection()
.prepareStatement(
"select session_date, type, sum(duration) duration from worksessions"
+ " where employee_id = ? and session_date between ? and ? group by session_date, type")) {
pstmt.setInt(1, id);
pstmt.setDate(2, new Date(startOfMonth.toDate().getTime()));
pstmt.setDate(3, new Date(endOfMonth.toDate().getTime()));
try (ResultSet rset = pstmt.executeQuery()) {
int temp_id = 1;
while (rset.next()) {
WorkSession ws =
new WorkSession(
temp_id++,
id,
rset.getDate("session_date"),
(short) rset.getInt("duration"),
rset.getString("type"));
switch (ws.getType()) {
case WORK:
workDaysTemp.add(ws);
break;
case SICKNESS:
sickDaysTemp.add(ws);
break;
case DAY_OFF:
dayOffsTemp.add(ws);
break;
default:
break;
}
}
}
} catch (SQLException | IOException e1) {
logger.error("Error while retrieving worked hours in a month by employeeid", e1);
throw new PersistentLayerException(e1);
}
List<WorkSession> workDays = new ArrayList<>();
for (WorkSession workDay : workDaysTemp) {
boolean contains = false;
for (WorkSession sickDay : sickDaysTemp) {
if (workDay.getDate().equals(sickDay.getDate())) {
contains = true;
}
}
for (WorkSession dayOff : dayOffsTemp) {
if (workDay.getDate().equals(dayOff.getDate())) {
contains = true;
}
}
if (!contains) {
workDays.add(workDay);
}
}
int sum = 0;
for (WorkSession workSession : workDays) {
sum += workSession.getDuration();
}
return sum;
}