a

.gitignore

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+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+.idea/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# dotenv
+.env
+
+# virtualenv
+.venv
+/venv
+ENV/
+.vscode
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+
+.DS_Store
+*.pyc
+*.db
+*.pid
+# django migrations 
+ATM_api/api/migrations/__init__.py
+!**/migrations
+!**/migrations/__init__.py
+*.iml
+*.sqlite3
+*.jpg
+*.jpeg

ATM_api/ATM/asgi.py

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+"""
+ASGI config for ATM project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'ATM.settings')
+
+application = get_asgi_application()

ATM_api/ATM/settings.py

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+"""
+Django settings for ATM project.
+
+Generated by 'django-admin startproject' using Django 3.1.4.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/3.1/ref/settings/
+"""
+
+from pathlib import Path
+import os
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = '$8s-4)=h7v))3@89d2h_(g(&71xr01n@5wbu%pfk8+fir0wfvt'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'rest_framework',
+    'api',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'ATM.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [os.path.join(BASE_DIR, 'templates')]
+        ,
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'ATM.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/3.1/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/3.1/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/3.1/howto/static-files/
+
+STATIC_URL = '/static/'

ATM_api/ATM/urls.py

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+"""ATM URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/3.1/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path, include
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path('api/', include('api.urls'))
+]

ATM_api/ATM/wsgi.py

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+"""
+WSGI config for ATM project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'ATM.settings')
+
+application = get_wsgi_application()

ATM_api/api/admin.py

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+from django.contrib import admin
+from .models import Bill, Coin, Currency
+
+# Register your models here.
+admin.site.register(Bill)
+admin.site.register(Coin)
+admin.site.register(Currency)

ATM_api/api/apps.py

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+from django.apps import AppConfig
+
+
+class ApiConfig(AppConfig):
+    name = 'api'

ATM_api/api/atm_exceptions.py

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+
+
+class TooMuchCoinsException(Exception):
+    """
+    Raised when there are more than 50 coins requested to be withdraw
+    """
+    pass
+

ATM_api/api/consts.py

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+
+
+# region bills
+
+BILL_200 = 'B200'
+BILL_100 = 'B100'
+BILL_50 = 'B50'
+BILL_20 = 'B20'
+
+VALID_BILLS = [BILL_200, BILL_100, BILL_50, BILL_20]
+
+# endregion
+
+# region coins
+
+COIN_10 = 'C10'
+COIN_5 = 'C5'
+COIN_1 = 'C1'
+COIN_01 = 'C0_1'
+COIN_001 = 'C0_01'
+
+VALID_COINS = [COIN_10, COIN_5, COIN_1, COIN_01, COIN_001]
+
+# endregion
+
+# region responses
+
+ERROR_AMOUNT_RES = {"result": {"error": "ATM does not have enough funds, please try to withdraw a different amount!"}}
+
+# endregion
+
+CURRENCY = "currency"
+AMOUNT = "amount"
+
+VALID_CURRENCIES = ['ILS', 'USD']
+
+

ATM_api/api/migrations/0001_initial.py

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+# Generated by Django 3.1.4 on 2020-12-28 17:54
+
+from decimal import Decimal
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Currency',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.TextField(max_length=36)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Coin',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('value', models.DecimalField(choices=[(Decimal('10.0'), 'C10'), (Decimal('5.0'), 'C5'), (Decimal('1.0'), 'C1'), (Decimal('0.1'), 'C0_1'), (Decimal('0.01'), 'C0_01')], decimal_places=2, max_digits=4)),
+                ('currency', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.currency')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Bill',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('value', models.IntegerField(choices=[(200, 'B200'), (100, 'B100'), (50, 'B50'), (20, 'B20')])),
+                ('currency', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.currency')),
+            ],
+        ),
+    ]