Class: StudentList

Inherits:
Object
  • Object
show all
Defined in:
lib/source/Student_list.rb

Instance Method Summary collapse

Constructor Details

#initialize(typer) ⇒ StudentList

Returns a new instance of StudentList.



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# File 'lib/source/Student_list.rb', line 6

def initialize(typer)
	self.students = []
	self.gen_id = students.count + 1
	self.typer = typer
end

Instance Method Details

#add_student(student) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 32

def add_student(student)
	students << student
	student.id = gen_id
	nextId
end

#count ⇒ Object 



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# File 'lib/source/Student_list.rb', line 57

def count
	self.students.count
end

#get_student(stud_id) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 24

def get_student(stud_id)
	students.find{|s| s.id == stud_id}
end

#get_students_pag(k, n, existing_data = nil) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 38

def get_students_pag(k,n,existing_data = nil)
	skip = (k-1) * n
	new_data = students[skip, n].map{|s| StudentShort.from_student_class(s)}

	return DataListStudentShort.new(new_data) if existing_data.nil?

	existing_data.replace_objects(new_data)
	existing_data
end

#nextId ⇒ Object 



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# File 'lib/source/Student_list.rb', line 61

def nextId
	self.gen_id=students.max_by(&:id).id + 1
end

#read_file(file_path) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/source/Student_list.rb', line 12

def read_file(file_path)
	raise ArgumentError.new("File not found #{file_path}") unless File.file?(file_path)
	hash_students = typer.read_file(File.read(file_path))
	self.students = hash_students.map{|h| Student.from_hash(h)}
	nextId
end

#remove_student(student_id) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 53

def remove_student(student_id)
	self.students.reject! {|s| s.id==student_id}
end

#replace_student(student_id, student) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 48

def replace_student(student_id, student)
	idx = student.find{|s| s.id==student.id}
	self.students[idx]=student
end

#sorted ⇒ Object 



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# File 'lib/source/Student_list.rb', line 28

def sorted
	students.sort_by(&:fio)
end

#write_file(file_path) ⇒ Object 



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# File 'lib/source/Student_list.rb', line 19

def write_file(file_path)
	hash_students = students.map(&:to_hash)
	File.write(file_path, typer.write_file(hash_students))
end