// Function to create an employee record
function createEmployeeRecord(firstName, familyName, title, payPerHour) {
  return {
    firstName: firstName,
    familyName: familyName,
    title: title,
    payPerHour: payPerHour,
    timeInEvents: [],
    timeOutEvents: []
  };
}
 
// Function to create employee records from an array of arrays
function createEmployeeRecords(arrays) {
  return arrays.map(array => createEmployeeRecord(...array));
}
 
// Function to record time in for an employee
function createTimeInEvent(employee, timeStamp) {
  employee.timeInEvents.push({
    type: "TimeIn",
    hour: parseInt(timeStamp.slice(11, 13)),
    date: timeStamp.slice(0, 10)
  });
  return employee;
}
 
// Function to record time out for an employee
function createTimeOutEvent(employee, timeStamp) {
  employee.timeOutEvents.push({
    type: "TimeOut",
    hour: parseInt(timeStamp.slice(11, 13)),
    date: timeStamp.slice(0, 10)
  });
  return employee;
}
 
// Function to calculate hours worked on a specific date
function hoursWorkedOnDate(employee, date) {
  const timeIn = employee.timeInEvents.find(event => event.date === date);
  const timeOut = employee.timeOutEvents.find(event => event.date === date);
  return (timeOut.hour - timeIn.hour) / 100;
}
 
// Function to calculate wages earned on a specific date
function wagesEarnedOnDate(employee, date) {
  const hoursWorked = hoursWorkedOnDate(employee, date);
  return hoursWorked * employee.payPerHour;
}
 
// Function to calculate all wages for an employee
function allWagesFor(employee) {
  const datesWorked = employee.timeInEvents.map(event => event.date);
  return datesWorked.reduce((totalWages, date) => totalWages + wagesEarnedOnDate(employee, date), 0);
}
 
// Function to find an employee by first name
function findEmployeeByFirstName(srcArray, firstName) {
  return srcArray.find(employee => employee.firstName === firstName);
}
 
// Function to calculate payroll for all employees
function calculatePayroll(employees) {
  return employees.reduce((totalPayroll, employee) => totalPayroll + allWagesFor(employee), 0);
}
 

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