Davis Cup World Group 1 Main stats & predictions

The Role of Technology in Enhancing Fan Experience

Tech advancements play a pivotal role in enriching fan experiences at tennis tournaments like the Davis Cup World Group 1. From live streaming options to interactive apps that offer real-time statistics [0]: import re [1]: import logging [2]: from django.conf import settings [3]: from django.contrib.auth import get_user_model [4]: from django.contrib.sites.shortcuts import get_current_site [5]: from django.core.cache import cache [6]: from django.core.mail import EmailMultiAlternatives [7]: from django.http import HttpResponse [8]: from django.template.loader import render_to_string [9]: from django.utils.http import urlsafe_base64_encode [10]: from allauth.account.adapter import get_adapter [11]: from allauth.account.utils import setup_user_email [12]: from allauth.utils import (email_address_exists, [13]: email_address_changed) [14]: from allauth.socialaccount.adapter import get_social_account_adapter [15]: try: [16]: from htmlmin.decorators import minify_response [17]: except ImportError: [18]: def minify_response(view): [19]: return view [20]: try: [21]: from allauth.account.views.password import PasswordResetFromKeyView as BasePasswordResetFromKeyView [22]: except ImportError: [23]: BasePasswordResetFromKeyView = object [24]: logger = logging.getLogger(__name__) [25]: class PasswordResetFromKeyView(BasePasswordResetFromKeyView): [26]: """ [27]: Use this view if you want custom password reset form. [28]: """ [29]: @minify_response() [30]: def get(self, request): [31]: self.reset_form_class = self.get_reset_form_class() [32]: self.reset_form = self.reset_form_class(self.request.POST) [33]: if self.reset_form.is_valid(): [34]: user = self.reset_form.save( [35]: self.request, [36]: all_tokens=self.kwargs['key'].split('+') [37]: ) [38]: # Log out user if necessary. [39]: if getattr(settings, [40]: 'ACCOUNT_LOGIN_ON_PASSWORD_RESET', [41]: False) is False: [42]: logout(request) [43]: msg = render_to_string('account/messages/password_reset_from_key.txt', { [44]: 'user': user, [45]: 'site': get_current_site(self.request), [46]: 'password_reset_url': settings.LOGIN_URL, [47]: }) subject = render_to_string('account/email/password_reset_from_key_subject.txt', { 'user': user, 'site': get_current_site(self.request), }) subject = ''.join(subject.splitlines()) email_template_name = 'account/email/password_reset_from_key_email.html' context = { 'user': user, 'site': get_current_site(self.request), 'password_reset_url': settings.LOGIN_URL, } html_email = render_to_string(email_template_name, context) msg_html = render_to_string('account/messages/password_reset_from_key.html', context) email_message = EmailMultiAlternatives(subject, msg, None, [user.email]) email_message.attach_alternative(html_email, "text/html") email_message.send() messages.success(self.request, msg_html) return self.form_valid(user) ***** Tag Data ***** ID: 4 description: Advanced password reset logic including form validation. start line: 30 end line: 42 dependencies: - type: Class name: PasswordResetFromKeyView start line: 25 end line: 28 context description: This snippet includes form validation logic along with handling user logout based on settings. algorithmic depth: 4 algorithmic depth external: N obscurity: 4 advanced coding concepts: 4 interesting for students: 5 self contained: Y ************ ## Challenging aspects ### Challenging aspects in above code The provided code snippet contains several layers of complexity that make it particularly challenging: 1. **Form Validation Logic**: The code involves validating a password reset form using `self.reset_form_class`. This requires understanding how Django forms work internally. 2. **Dynamic Token Handling**: The `all_tokens` parameter is dynamically created by splitting `self.kwargs['key']`. This requires careful handling of incoming parameters which might be prone to errors if not handled correctly. 3. **Conditional User Logout**: There's conditional logic based on Django settings (`ACCOUNT_LOGIN_ON_PASSWORD_RESET`). This adds complexity because it requires understanding Django settings management. 4. **Contextual Rendering**: The `render_to_string` function is used to create messages dynamically based on user data (`msg`). This involves both template rendering knowledge and understanding how user data should be securely handled. 5. **Dependency Management**: The code relies on multiple dependencies such as Django’s authentication system (`logout`), site framework (`get_current_site`), URL configurations (`settings.LOGIN_URL`), etc., which requires deep familiarity with Django's ecosystem. ### Extension To extend this exercise: 1. **Enhanced Token Validation**: Add more complex token validation logic that might include checking expiration times or multi-factor tokens. 2. **Customizable Templates**: Allow users/admins to customize email templates dynamically via admin panel or settings file. 3. **Audit Logging**: Introduce audit logging that tracks every password reset attempt including success/failure status. 4. **Rate Limiting**: Implement rate limiting on password reset attempts per user/IP address. 5. **Multi-language Support**: Add support for multiple languages based on user preferences or site configuration. ## Exercise ### Task Description You are tasked with extending an existing Django-based password reset functionality inspired by [SNIPPET]. The goal is to add enhanced security features while maintaining code quality standards. ### Requirements: 1. **Enhanced Token Validation**: - Tokens should expire after a configurable period (e.g., `PASSWORD_RESET_TIMEOUT`). - Introduce multi-factor token support by requiring an additional OTP sent via SMS/email during password reset. 2. **Customizable Templates**: - Allow email templates used during password reset (subject & body) to be customizable via Django admin interface. - Default templates should still be available if no custom templates are set. 3. **Audit Logging**: - Implement audit logging that records every password reset attempt (successful or not). Log details should include timestamp, user ID (if available), IP address, success/failure status. 4. **Rate Limiting**: - Implement rate limiting so that users cannot initiate more than `MAX_RESET_ATTEMPTS` within `RESET_ATTEMPT_WINDOW`. 5. **Multi-language Support**: - Add support for multiple languages using Django’s built-in internationalization framework. ### Code Snippet Reference Refer to [SNIPPET] as your starting point: python class PasswordResetFromKeyView(BasePasswordResetFromKeyView): python ### Solution python from django.utils.timezone import now as timezone_now from django.conf import settings from django.core.mail import send_mail from django.template.loader import render_to_string from django.contrib.sites.shortcuts import get_current_site from django.contrib.auth.tokens import default_token_generator from django.contrib.auth.models import User from django.http import HttpResponseForbidden class PasswordResetFromKeyView(BasePasswordResetFromKeyView): def get(self, request): self.reset_form_class = self.get_reset_form_class() self.reset_form = self.reset_form_class(self.request.POST) if not self._is_token_valid(request): return HttpResponseForbidden("Token invalid or expired.") if not self._is_rate_limited(request): return HttpResponseForbidden("Too many attempts.") if self.reset_form.is_valid(): user = self.reset_form.save( self.request, all_tokens=self.kwargs['key'].split('+') ) # Log out user if necessary. if getattr(settings,'ACCOUNT_LOGIN_ON_PASSWORD_RESET', False) is False: logout(request) # Send customizable email template subject_template_name = getattr(settings,'PASSWORD_RESET_SUBJECT_TEMPLATE', 'account/email/password_reset_subject.txt') email_template_name = getattr(settings,'PASSWORD_RESET_EMAIL_TEMPLATE', 'account/email/password_reset_email.html') subject = render_to_string(subject_template_name,{ 'user': user, 'site': get_current_site(self.request), 'password_reset_url': settings.LOGIN_URL, }) subject = ''.join(subject.splitlines()) email_html_message = render_to_string(email_template_name,{ 'user': user, 'site': get_current_site(self.request), 'password_reset_url': settings.LOGIN_URL, }) send_mail(subject,'',None,[user.email],html_message=email_html_message) # Audit logging example (should be implemented according to project needs) self._log_password_reset_attempt(user.id if user else None,request.META.get('REMOTE_ADDR'),'Success') return super().form_valid(self.reset_form) # Audit logging example (should be implemented according to project needs) self._log_password_reset_attempt(None,request.META.get('REMOTE_ADDR'),'Failure') return super().form_invalid(self.reset_form) def _is_token_valid(self,request): # Validate token expiration logic here token_expiry_time = timezone_now() - timedelta(minutes=settings.PASSWORD_RESET_TIMEOUT) try: key_parts = request.GET.get('key').split('+') uidb64 = key_parts.pop(0) token = key_parts.pop(0) #