def remove(self, studentID, cascadeOpe=None):
'''
Removes a student from repo
Input: studentID - positive integer
'''
st = self.findByID(studentID)
self._repo.remove(studentID)
undo = FunctionCall(self.add, st)
redo = FunctionCall(self.remove, studentID)
op = Operation(redo, undo)
if cascadeOpe is None:
self._undo.addOperation(op)
else:
op = Operation(redo, undo)
cascadeOpe.addOp(op)
def setAssigStud(self, assignmentID, studentID, cascade=None):
'''
Assign an assignment to a student by adding in grades list a grade
assignmenID, studentID and a mark of 0
Input: - assignmentID - int >=0
- studentID - int >=0
Output: - True - if setting succeded
- Fale - otherwise
'''
if self.filterGradesBy(studentID, assignmentID) == []:
redo = FunctionCall(self.setAssigStud, assignmentID, studentID,
0.0)
undo = FunctionCall(self.remove, studentID, assignmentID, True)
if not isinstance(cascade, OperationsCascade):
self._undo.addOperation(Operation(redo, undo))
else:
cascade.addOp(Operation(redo, undo))
self.add(Grade(assignmentID, studentID, 0.0), True)
return True
return False
def add(self, student):
'''
Adds a student if it's valid in repo
Input: student - Student obj
'''
if not isinstance(student, Student):
raise TypeError("Student must be an instace of Student class!")
self._sVal.validate(student)
undo = FunctionCall(self.remove, student.id)
redo = FunctionCall(self.add, student)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.add(student)
def remove(self, assignmnetID, cascadeOP=None):
'''
Removes an assignmnet from repo
Input: assignmnetID - positive integer
'''
assignment = self.findByID(assignmnetID)
self._repo.remove(assignmnetID)
undo = FunctionCall(self.add, assignment)
redo = FunctionCall(self.remove, assignmnetID)
op = Operation(redo, undo)
if cascadeOP:
cascadeOP.addOp(op)
else:
self._undo.addOperation(op)
def add(self, grade, cascade=None):
'''
Adds in repo a grade if it's valid
Input: grade - Grade obj
'''
if not isinstance(grade, Grade):
raise TypeError("Grade must be an instace of Grade class!")
self._gradeValid.validate(grade)
if not cascade:
undo = FunctionCall(self.remove, grade.studentID, grade.assignID)
redo = FunctionCall(self.add, grade)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.add(grade)
def update(self, newGrade):
'''
Updates a grade's info by its id if newGrade is valid
Input: newGrade - Grade obj
'''
if not isinstance(newGrade, Grade):
raise TypeError("Grade must be an instace of Grade class!")
self._gradeValid.validate(newGrade)
oldGrade = self.findByID(newGrade.studentID, newGrade.assignID)
undo = FunctionCall(self.update, oldGrade)
redo = FunctionCall(self.update, newGrade)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.update(newGrade)
def add(self, assignmnet):
'''
Adds in repo an assignmnets if it's valid
Input: assignmnet - Assignmnet obj
'''
if not isinstance(assignmnet, Assignment):
raise TypeError(
"Assignment must be an instace of Assignment class!")
self._aVal.validate(assignmnet)
undo = FunctionCall(self.remove, assignmnet.id)
redo = FunctionCall(self.add, assignmnet)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.add(assignmnet)
def update(self, studentNew):
'''
Updates a student's info by its id if studentNew is valid
Input: studentNew - Student obj
'''
if not isinstance(studentNew, Student):
raise TypeError("Student must be an instace of Student class!")
self._sVal.validate(studentNew)
st = self.findByID(studentNew.id)
undo = FunctionCall(self.update, studentNew)
redo = FunctionCall(self.update, st)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.update(studentNew)
def update(self, assignmnetNew):
'''
Updates an assignmnet info by its id if assignmnetNew is valid
Input: assignmnetNew - Assignmnet obj
'''
if not isinstance(assignmnetNew, Assignment):
raise TypeError(
"Assignment must be an instace of Assignment class!")
self._aVal.validate(assignmnetNew)
assignmentOld = self.findByID(assignmnetNew.id)
undo = FunctionCall(self.update, assignmentOld)
redo = FunctionCall(self.update, assignmnetNew)
op = Operation(redo, undo)
self._undo.addOperation(op)
self._repo.update(assignmnetNew)
def remove(self, studID, assigID, cascade=None):
'''
Removes a grade
Input: studID - positive int
assigID - positive int
Output: True - if removing succeded
False - otherwise
'''
fd = self.findByID(studID, assigID)
if type(fd) != Grade:
raise ValueError("This grade does not exist!")
self._repo.removeGrade(fd)
undo = FunctionCall(self.add, fd)
redo = FunctionCall(self.remove, fd.studentID, fd.assignID)
op = Operation(redo, undo)
if not cascade:
self._undo.addOperation(op)
def main():
auth = False
while(1):
if(auth):
op = Operation.operate()
if op == 'operate':
continue
elif op == 'logout':
auth = False
continue
elif op == 'clear':
sp.call('cls', shell = True)
continue
else:
break
else:
auth = Authentication.check()
print("Thanks.")
def removeStud(self, studID):
'''
Removes a student from repo and its grades
Input: studentID - positive integer
Output: True - if removing succeded
False - otherwise
'''
cmds = OperationsCascade()
x = self._stud.findByID(studID)
if type(x) == Student:
gr = self.getAll()
for i in range(len(gr) - 1, -1, -1):
if gr[i].studentID == studID:
redo = FunctionCall(self.remove, gr[i].studentID,
gr[i].assignID)
undo = FunctionCall(self.add, gr[i])
op = Operation(redo, undo)
cmds.addOp(op)
self._repo.removeGrade(gr[i])
self._stud.remove(studID, cmds)
cmds.reverseOper()
self._undo.addOperation(cmds)
return True
return False
def removeAssign(self, assignID):
'''
Removes an assignmnet from repo and also its grades
Input: assignmnetID - positive integer
Output: True - if removing succeded
False - otherwise
'''
cmds = OperationsCascade()
x = self._assig.findByID(assignID)
if type(x) == Assignment:
gr = self.getAll()
for i in range(len(gr) - 1, -1, -1):
if gr[i].assignID == assignID:
redo = FunctionCall(self.remove, gr[i].studentID,
gr[i].assignID)
undo = FunctionCall(self.add, gr[i])
op = Operation(redo, undo)
cmds.addOp(op)
del gr[i]
self._assig.remove(assignID, cmds)
cmds.reverseOper()
self._undo.addOperation(cmds)
return True
return False