def load(self, f, info=False):
"""
Loads scheduler, shiftcal, & employees from filename
@params f: an open file pointer in "rb" mode
@params info: T/F whether to print detailed loading info
@return: True if no errors occurred, False otherwise
"""
try:
print("Loading Scheduler data...")
self.year = pickle.load(f)
if info:
print(" Read year: %d" % self.year)
self.month = pickle.load(f)
if info:
print(" Read month: %d" % self.month)
self.numDays = pickle.load(f)
if info:
print(" Read number of days: %d" % self.numDays)
self.firstDay = pickle.load(f)
if info:
print(" Read first day: %d" % self.firstDay)
print(" Loaded scheduler attributes")
if info:
print(" Checking employee data")
numEmps = pickle.load(f)
if info:
print(" Read num employees: %d" % numEmps)
self.employeeList = []
emp_dict = {}
print("")
if numEmps == 0:
print("No Employee data to load...")
else:
print("Loading Employees...")
print(" %d employees to load\n" % numEmps)
for i in range(0, numEmps):
emp = Employee("dummy", 1) # dummy employee who will be overwritten by loaded emp
if emp.load(f, info):
self.employeeList.append(emp)
emp_dict[emp.getName()] = emp
else:
return False
print("")
print("")
self.cal = ShiftCalendar(1, 1970) # dummy shiftCal
if self.cal.load(f, emp_dict, info):
return True
else:
print("Error occured loading calendar...")
return False
except FileNotFoundError:
print("Couldnt find scheduler data file...")
return False
def __init__(self, month, year):
assert type(month) == int and type(year) == int, "month and year should be integers"
assert month in range(1, 13) and year >= 0, "month or year out of bounds"
self.cal = ShiftCalendar(month, year)
self.year = year
self.month = month
self.numDays = self.cal.numDays
self.firstDay = self.cal.firstDay # which weekday month starts on (0-6)
self.employeeList = [] # list of employee objects
class Scheduler:
"""Shift Scheduler"""
def __init__(self, month, year):
assert type(month) == int and type(year) == int, "month and year should be integers"
assert month in range(1, 13) and year >= 0, "month or year out of bounds"
self.cal = ShiftCalendar(month, year)
self.year = year
self.month = month
self.numDays = self.cal.numDays
self.firstDay = self.cal.firstDay # which weekday month starts on (0-6)
self.employeeList = [] # list of employee objects
def save(self, f, info=False):
"""
Saves Scheduler data using python's pickle module
@params f: open file pointer in "wb" mode
@params info: T/F whether to print additional info while saving.
@return: 1 if successful, -1 if unsuccessfull.
"""
print("Saving Scheduler data...")
pickle.dump(self.year, f)
pickle.dump(self.month, f)
pickle.dump(self.numDays, f)
pickle.dump(self.firstDay, f)
# NOTE: Cannot pickle employeeList, need to pickle each employee individually and then reconstruct list.
if info:
print(" Saved scheduler attributes")
if info:
print(" Checking employee list")
# save length of employee list
pickle.dump(len(self.employeeList), f)
print("")
# If not 0 then save each employee
if len(self.employeeList) != 0:
print("Saving Employee data...")
print(" %d employees to save\n" % len(self.employeeList))
for e in self.employeeList:
if not e.save(f, info):
print("An error occured!")
return False
print("")
else:
print("No employee data to save...")
# save shiftCal
print("")
if self.cal.save(f, info):
return True
else:
return False
def load(self, f, info=False):
"""
Loads scheduler, shiftcal, & employees from filename
@params f: an open file pointer in "rb" mode
@params info: T/F whether to print detailed loading info
@return: True if no errors occurred, False otherwise
"""
try:
print("Loading Scheduler data...")
self.year = pickle.load(f)
if info:
print(" Read year: %d" % self.year)
self.month = pickle.load(f)
if info:
print(" Read month: %d" % self.month)
self.numDays = pickle.load(f)
if info:
print(" Read number of days: %d" % self.numDays)
self.firstDay = pickle.load(f)
if info:
print(" Read first day: %d" % self.firstDay)
print(" Loaded scheduler attributes")
if info:
print(" Checking employee data")
numEmps = pickle.load(f)
if info:
print(" Read num employees: %d" % numEmps)
self.employeeList = []
emp_dict = {}
print("")
if numEmps == 0:
print("No Employee data to load...")
else:
print("Loading Employees...")
print(" %d employees to load\n" % numEmps)
for i in range(0, numEmps):
emp = Employee("dummy", 1) # dummy employee who will be overwritten by loaded emp
if emp.load(f, info):
self.employeeList.append(emp)
emp_dict[emp.getName()] = emp
else:
return False
print("")
print("")
self.cal = ShiftCalendar(1, 1970) # dummy shiftCal
if self.cal.load(f, emp_dict, info):
return True
else:
print("Error occured loading calendar...")
return False
except FileNotFoundError:
print("Couldnt find scheduler data file...")
return False
def addEmployee(self, employee):
"""
Adds an employee to the scheduler
@params employee: an employee object to be added
"""
if employee.__class__.__name__ == "Employee":
self.employeeList.append(employee)
print("Employee %s added." % employee.getName())
def removeEmployee(self, employee):
"""
Removes an employee from the scheduler and deletes any shifts assigned to him/her
@params employee: Employee obect to be removed
@return: returns 1 on success, -1 for any type of error.
"""
if employee.__class__.__name__ == "Employee":
# IMPROVE THIS TO DELETE ALL THAT EMPLOYEES SHIFTS & RETURN MORE INFO
if employee in self.employeeList:
self.cal.removeAllForEmp(employee)
print("Employee %s removed." % employee.getName())
self.employeeList.remove(employee)
return 1
else:
print("%s employee does not exist" % employee.getName())
return -1
def createShiftW(self, weekdays, times, lunch=False):
"""
Creates shifts with given times for each weekday in weekdays
@params weekdays: list of weekdays to create shifts for (0-6)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if you want to create a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(weekdays) > 0 and len(times) > 0:
for day in weekdays:
self.cal.setShiftsByDay(day, times, lunch)
return 1
return -1
def createShiftD(self, days, times, lunch=False):
"""
Creates shifts with given times for each day in days
@params days: list of days to create shifts for (1-31)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if you want to create a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(days) > 0 and len(times) > 0:
for d in days:
self.cal.setSingleDay(d, times, lunch)
return 1
return -1
def delShiftW(self, weekdays, times, lunch=False):
"""
Deletes shifts with given times for each weekday in weekdays
@params weekdays: list of weekdays to delete shifts for (0-6)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(weekdays) > 0 and len(times) > 0:
for day in weekdays:
for t in times:
self.cal.deleteShiftEveryWeek(day, t, lunch)
return 1
return -1
def delShiftD(self, days, times, lunch=False):
"""
Deletes shifts with given times for each day in days
@params days: list of days to delete shifts for (1-31)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(days) > 0 and len(times) > 0:
for d in days:
for t in times:
if self.cal.deleteSingleShift(d, t, lunch) == -1:
print("Failed to delete shift %d - %s" % (d, t))
return -1
return 1
else:
return -1
def assignW(self, emp, weekdays, times, lunch=False):
"""
Assigns employee to shifts with given times for each weekday in weekdays
@params emp: Employee object assigned to each shift
@params weekdays: list of weekdays to assign shifts for (0-6)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if emp.__class__.__name__ == "Employee" and len(weekdays) > 0 and len(times) > 0:
for d in weekdays:
for t in times:
self.cal.assignShiftEveryWeek(d, t, emp, lunch)
return 1
return -1
def assignD(self, emp, days, times, lunch=False):
"""
Assigns employee to shifts with given times for each day in days
@params emp: Employee object assigned to each shift
@params days: list of days to assign shifts for (1-31)
@params times: list of Time objects, start time of each shift for each day
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if emp.__class__.__name__ == "Employee" and len(weekdays) > 0 and len(times) > 0:
for d in days:
for t in times:
self.cal.assignShift(d, t, emp, lunch)
return 1
return -1
def clearW(self, weekdays, times="all", lunch=False):
"""
Clears shifts with given times for each weekday in weekdays
@params weekdays: list of weekdays to clear shifts for (0-6)
@params times: list of Time objects, start time of each shift for each day
can also be a string "all" indicating all shifts for those weekdays should be cleared
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(weekdays) > 0 and len(times) > 0:
if times == "all":
times = [None] # more intuitive way to indicate clearing all shifts
for day in weekdays:
for t in times:
self.cal.clearShiftsEveryWeek(day, t, lunch)
return 1
return -1
def clearD(self, days, times="all", lunch=False):
"""
Clears shifts with given times for each day in days
@params days: list of days to clear shifts for (1-31)
@params times: list of Time objects, start time of each shift for each day
can also be a string "all" indicating all shifts for those days should be cleared
@params lunch: boolean if referring to a lunch shift or dinner shift (lunch=False)
@return: 1 if successful, -1 otherwise
"""
if len(days) > 0 and len(times) > 0:
for d in days:
for t in times:
self.cal.clearSingleShift(d, t, lunch)
return 1
return -1
def matchShift(self, employee, l, t, wd, wn, d):
"""
Creates a rule from shift info provided and matches with given employee
@params employee: Employee object
@params d: integer (1-31) indicating day to match
@params l: boolean indicating whether to match a lunch or dinner shift
@params t: A string representing the time at which shift starts
@params wd: integer (0-6) indicating which day of the week shift is on
@params wn: integer (1-6) indicating which number week the shift is on
@returns: True or False depending on whether employee can work that shift.
"""
if employee not in self.employeeList:
print("Employee not found.")
return -1
shift_rule = Rule(lunch=l, time=t, weekday=wd, weeknum=wn, daynum=d)
return employee.matchRule(shift_rule)
def run(self, depth):
"""
Run scheduler until finding a complete schedule
Should take into account priority & alternate between all employees equally
"""
# Clear previous assignments
self.cal.clearAllShifts()
print("\nAll shifts cleared")
self.cal.printCal()
print("")
print(self.employeeList)
res = self.assignEmployee(1, self.cal.getDay(1), self.employeeList.copy().sort(), depth)
print("\nScheduling Done: %s" % res)
return res
def assignEmployee(self, daynum, shift_day, employeeList, depth=-1):
"""
Recursive function, on each call tries to assign employee from employeeList to an open shift in shift_day
Then removes employee assigned from employeeList and calls itself until day is filled.
If employeeList empty and day not complete, declare failure
Else if day is complete, rebuild employee list and call recursively on next day
If daynum > number of days in month, check if calendar is complete, else return failure.
@params daynum: integer (1 to numDays in month), day we are working on
@shift_day: ShiftDay object of that day
@employeeList: list of employees ordered by priority
@depth: integer indicating how many recursive calls to execute before stopping, used for testing. -1 disables limiting depth
@return: True if found a complete schedule, False if not. Modifies the shiftcalendar in place
"""
# No more shifts left to schedule
if self.cal.isComplete():
return True
# We are done with all days
if daynum > self.cal.numDays:
return self.cal.isComplete()
# Stop scheduling for testing purposes
if depth == 0:
return True
print("Trying to schedule day %d" % daynum)
shift = shift_day.getNextEmptyShift()
# No more shifts left for this day, move on to next day
if shift == None:
print("No more shifts left for this day.")
empList = self.employeeList.copy() # get fresh employee list
empList.sort()
sd = self.cal.getDay(daynum + 1)
print("reset emp list to %s" % (str(empList)))
return self.assignEmployee(daynum + 1, sd, empList, depth)
# Else there is a shift to schedule
lunch = shift[0]
time = shift[1]
weekday = shift_day.weekday
weeknum = shift_day.weeknum
print("empList: %s" % (str(employeeList)))
for e in employeeList:
print("---------")
print("Trying employee %s" % (str(e)))
if self.matchShift(e, lunch, time, weekday, weeknum, daynum): # true if employee can work shift
print("%s can work that shift!" % (str(e)))
temp = e
if lunch:
shift_day.setLunchShift(time, e)
else:
shift_day.setDinnerShift(time, e)
newEmpList = employeeList.copy()
newEmpList.remove(e)
print("new emp list: %s" % (newEmpList))
print("new depth = %d" % (depth - 1))
if not self.assignEmployee(daynum, shift_day, newEmpList, depth - 1):
# scheduling was unsuccessful, undo assignment
if lunch:
shift_day.setLunchShift(time, None)
else:
shift_day.setDinnerShift(time, None)
continue # next employee
else:
# everything went well
return True
# We get here if we have gone through all employees so declare failure
return False
