Shift

django-admin startproject shift_management
cd shift_management

python manage.py startapp attendance

INSTALLED_APPS = [
    # অন্যান্য অ্যাপস
    'attendance',
]

from django.db import models

class Shift(models.Model):
    name = models.CharField(max_length=100)
    start_time = models.TimeField()
    end_time = models.TimeField()
    grace_period = models.IntegerField(default=0)  # মঞ্জুর দেরির সময় (মিনিট)

    def __str__(self):
        return f"{self.name} ({self.start_time} - {self.end_time})"

class Employee(models.Model):
    name = models.CharField(max_length=255)
    employee_id = models.CharField(max_length=20, unique=True)
    default_shift = models.ForeignKey(Shift, on_delete=models.SET_NULL, null=True, related_name='default_employees')

    def __str__(self):
        return self.name

class TemporaryShift(models.Model):
    employee = models.ForeignKey(Employee, on_delete=models.CASCADE)
    shift = models.ForeignKey(Shift, on_delete=models.CASCADE)
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f"{self.employee.name} ({self.start_date} - {self.end_date}) : {self.shift.name}"

from django.utils import timezone
from datetime import datetime, timedelta

class Attendance(models.Model):
    employee = models.ForeignKey(Employee, on_delete=models.CASCADE)
    shift = models.ForeignKey(Shift, on_delete=models.CASCADE, null=True, blank=True)
    date = models.DateField(default=timezone.now)
    in_time = models.DateTimeField(null=True, blank=True)
    out_time = models.DateTimeField(null=True, blank=True)
    in_out_status = models.CharField(max_length=10, choices=[('in', 'In'), ('out', 'Out')])
    status = models.CharField(max_length=20, default='Absent')

    def save(self, *args, **kwargs):
        temp_shift = TemporaryShift.objects.filter(
            employee=self.employee,
            start_date__lte=self.date,
            end_date__gte=self.date
        ).first()
        
        if temp_shift:
            self.shift = temp_shift.shift
        else:
            self.shift = self.employee.default_shift

        if self.in_out_status == 'in' and self.in_time:
            shift_start_time = datetime.combine(self.date, self.shift.start_time)
            if self.in_time > shift_start_time + timedelta(minutes=self.shift.grace_period):
                self.status = 'Late'
            else:
                self.status = 'On Time'
        super(Attendance, self).save(*args, **kwargs)

    def __str__(self):
        return f"{self.employee.name} - {self.date} ({self.in_out_status})"

python manage.py makemigrations
python manage.py migrate

from django.contrib import admin
from .models import Employee, Shift, TemporaryShift, Attendance

admin.site.register(Employee)
admin.site.register(Shift)
admin.site.register(TemporaryShift)
admin.site.register(Attendance)

from attendance.models import Employee, Shift

employee = Employee.objects.get(employee_id='EMP001')
default_shift = Shift.objects.get(name='Morning Shift')
employee.default_shift = default_shift
employee.save()

from attendance.models import Employee, Shift, TemporaryShift

employee = Employee.objects.get(employee_id='EMP001')
shift = Shift.objects.get(name='Night Shift')

temporary_shift = TemporaryShift(
    employee=employee,
    shift=shift,
    start_date='2024-10-20',
    end_date='2024-10-25'
)
temporary_shift.save()

from attendance.models import Attendance, Employee

employee = Employee.objects.get(employee_id='EMP001')
attendance = Attendance(
    employee=employee,
    in_time="2024-10-20 08:30:00",  # ইন টাইম
    in_out_status='in',
    date='2024-10-20'
)
attendance.save()

from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import Employee, Shift, TemporaryShift
from datetime import datetime

class AssignShiftView(APIView):
    def post(self, request, *args, **kwargs):
        # JSON ডেটা থেকে শ্রমিক, ডেট এবং শিফট ID সংগ্রহ করা
        employee_ids = request.data.get('employee_ids', [])
        date_list = request.data.get('date_list', [])
        shift_id = request.data.get('shift_id')

        # শিফট চেক করা
        try:
            shift = Shift.objects.get(id=shift_id)
        except Shift.DoesNotExist:
            return Response({'error': 'Invalid shift ID'}, status=status.HTTP_400_BAD_REQUEST)

        # শ্রমিকদের লিস্ট থেকে শ্রমিকদের খুঁজে বের করা
        employees = Employee.objects.filter(id__in=employee_ids)

        if not employees.exists():
            return Response({'error': 'No employees found'}, status=status.HTTP_400_BAD_REQUEST)

        # প্রতিটি শ্রমিকের জন্য প্রতিটি ডেটে শিফট এসাইন করা
        for employee in employees:
            for date in date_list:
                try:
                    date_obj = datetime.strptime(date, '%Y-%m-%d').date()  # ডেট স্ট্রিং থেকে ডেট অবজেক্টে রূপান্তর
                    # শিফট এসাইন করা
                    TemporaryShift.objects.create(
                        employee=employee,
                        shift=shift,
                        start_date=date_obj,
                        end_date=date_obj
                    )
                except Exception as e:
                    return Response({'error': str(e)}, status=status.HTTP_400_BAD_REQUEST)

        return Response({'success': 'Shift assigned successfully'}, status=status.HTTP_200_OK)

from django.urls import path
from .views import AssignShiftView

urlpatterns = [
    path('assign-shift/', AssignShiftView.as_view(), name='assign-shift'),
]

{
    "employee_ids": [1, 2, 3],  // শ্রমিকদের ID
    "date_list": ["2024-10-20", "2024-10-21", "2024-10-22"],  // ডেট লিস্ট
    "shift_id": 5  // শিফটের ID
}

POST /assign-shift/
Host: yourdomain.com
Content-Type: application/json

{
    "employee_ids": [1, 2, 3],
    "date_list": ["2024-10-20", "2024-10-21", "2024-10-22"],
    "shift_id": 5
}