mirror of
https://github.com/freedombox/FreedomBox.git
synced 2026-01-21 07:55:00 +00:00
4b2162f3fd
Warn of installed conflicting packages before installing apps. [sunil: Rename 'advice' to 'action'] [sunil: Action will be string constant, for better API and i18n] [sunil: Don't show conflict warning if action is 'ignore'] Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org> Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>
362 lines
12 KiB
Python
362 lines
12 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""
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Main FreedomBox views.
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"""
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import io
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import time
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import urllib.parse
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from django.contrib import messages
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from django.core.exceptions import ImproperlyConfigured
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from django.http import Http404, HttpResponseBadRequest, HttpResponseRedirect
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from django.template.response import TemplateResponse
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from django.urls import reverse
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from django.utils.html import escape
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from django.utils.translation import gettext as _
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from django.views.generic import TemplateView
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from django.views.generic.edit import FormView
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from stronghold.decorators import public
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from plinth import app, package
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from plinth.daemon import app_is_running
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from plinth.modules.config import get_advanced_mode
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from plinth.modules.firewall.components import get_port_forwarding_info
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from plinth.translation import get_language_from_request, set_language
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from . import forms, frontpage
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REDIRECT_FIELD_NAME = 'next'
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def is_safe_url(url):
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"""Check if the URL is safe to redirect to.
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Based on Django internal utility.
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"""
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if url is not None:
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url = url.strip()
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if not url:
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return False
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if '\\' in url or url.startswith('///'):
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return False
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try:
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result = urllib.parse.urlparse(url)
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except ValueError:
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return False
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# Only accept URLs to the same site and scheme.
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if result.scheme or result.netloc:
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return False
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return True
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def _get_redirect_url_from_param(request):
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"""Return the redirect URL from 'next' GET/POST param."""
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redirect_to = request.GET.get(REDIRECT_FIELD_NAME, '')
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redirect_to = request.POST.get(REDIRECT_FIELD_NAME, redirect_to)
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if is_safe_url(redirect_to):
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return redirect_to
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return reverse('index')
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@public
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def index(request):
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"""Serve the main index page."""
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username = str(request.user) if request.user.is_authenticated else None
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shortcuts = frontpage.Shortcut.list(username)
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selected = request.GET.get('selected')
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selected_shortcut = [
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shortcut for shortcut in shortcuts if shortcut.component_id == selected
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]
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selected_shortcut = selected_shortcut[0] if selected_shortcut else None
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return TemplateResponse(
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request, 'index.html', {
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'title': _('FreedomBox'),
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'shortcuts': shortcuts,
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'selected_shortcut': selected_shortcut,
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})
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class AppsIndexView(TemplateView):
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"""View for apps index"""
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template_name = 'apps.html'
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def get_context_data(self, *args, **kwargs):
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context = super().get_context_data(*args, **kwargs)
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context['show_disabled'] = True
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context['advanced_mode'] = get_advanced_mode()
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return context
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def system_index(request):
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"""Serve the system index page."""
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return TemplateResponse(request, 'system.html',
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{'advanced_mode': get_advanced_mode()})
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class LanguageSelectionView(FormView):
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"""View for language selection"""
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form_class = forms.LanguageSelectionForm
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template_name = 'language-selection.html'
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def get_initial(self):
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"""Return the initial values for the form."""
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return {'language': get_language_from_request(self.request)}
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def form_valid(self, form):
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"""Set or reset the current language."""
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response = super().form_valid(form)
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set_language(self.request, response, form.cleaned_data['language'])
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return response
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def get_success_url(self):
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"""Return the URL in the next parameter or home page."""
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return _get_redirect_url_from_param(self.request)
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class AppView(FormView):
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"""A generic view for showing an app's main page.
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The view and it's template may be customized but by default show the
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following:
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* Icon for the app
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* Name of the app
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* Description of the app
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* Link to the manual page for the app
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* A button to enable/disable the app
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* A toolbar with common actions such as 'Run diagnostics'
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* A status section showing the running status of the app
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* A form for configuring the app
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The following class properties are available on the view:
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'app_id' is the mandatory property to set the ID of the app. It is used to
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retrieve the App instance for the app that is needed for basic information
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and operations such as enabling/disabling the app.
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'form_class' is the Django form class that is used by this view. It may be
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None if the app does not have a configuration form. Default is None.
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'template_name' is the template used to render this view. By default it is
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app.html. It may be overridden with a template that derives from app.html
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to customize the appearance of the app to achieve more complex presentation
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instead of the simple appearance provided by default.
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"""
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form_class = None
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app_id = None
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template_name = 'app.html'
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def __init__(self, *args, **kwargs):
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"""Initialize the view."""
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super().__init__(*args, **kwargs)
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self._common_status = None
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def post(self, request, *args, **kwargs):
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"""Handle app enable/disable button separately."""
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if 'app_enable_disable_button' not in request.POST:
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return super().post(request, *args, **kwargs)
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form = forms.AppEnableDisableForm(data=self.request.POST)
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if form.is_valid():
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return self.enable_disable_form_valid(form)
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return HttpResponseBadRequest('Invalid form submission')
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@property
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def success_url(self):
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return self.request.path
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@property
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def app(self):
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"""Return the app for which this view is configured."""
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if not self.app_id:
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raise ImproperlyConfigured('Missing attribute: app_id')
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return app.App.get(self.app_id)
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def get_form(self, *args, **kwargs):
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"""Return an instance of this view's form.
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Also the form_class for this view to be None.
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"""
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if not self.form_class:
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return None
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return super().get_form(*args, **kwargs)
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def _get_common_status(self):
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"""Return the status needed for form and template.
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Avoid multiple queries to expensive operations such as
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app.is_enabled().
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"""
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if self._common_status:
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return self._common_status
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self._common_status = {'is_enabled': self.app.is_enabled()}
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return self._common_status
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def get_initial(self):
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"""Return the status of the app to fill in the form."""
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initial = super().get_initial()
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initial.update(self._get_common_status())
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return initial
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def form_valid(self, form):
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"""Enable/disable a service and set messages."""
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if not self.request._messages._queued_messages:
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messages.info(self.request, _('Setting unchanged'))
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return super().form_valid(form)
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def get_enable_disable_form(self):
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"""Return an instance of the app enable/disable form.
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If the app can't be disabled by the user, return None.
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"""
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if not self.app.can_be_disabled:
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return None
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initial = {
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'should_enable': not self._get_common_status()['is_enabled']
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}
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return forms.AppEnableDisableForm(initial=initial)
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def enable_disable_form_valid(self, form):
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"""Form handling for enabling / disabling apps."""
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should_enable = form.cleaned_data['should_enable']
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if should_enable != self.app.is_enabled():
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if should_enable:
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self.app.enable()
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else:
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self.app.disable()
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return HttpResponseRedirect(self.request.path)
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def get_context_data(self, *args, **kwargs):
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"""Add service to the context data."""
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context = super().get_context_data(*args, **kwargs)
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context.update(self._get_common_status())
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context['app_id'] = self.app.app_id
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context['is_running'] = app_is_running(self.app)
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context['app_info'] = self.app.info
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context['has_diagnostics'] = self.app.has_diagnostics()
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context['port_forwarding_info'] = get_port_forwarding_info(self.app)
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context['app_enable_disable_form'] = self.get_enable_disable_form()
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from plinth.modules.firewall.components import Firewall
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context['firewall'] = self.app.get_components_of_type(Firewall)
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return context
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class SetupView(TemplateView):
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"""View to prompt and setup applications."""
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template_name = 'setup.html'
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def get_context_data(self, **kwargs):
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"""Return the context data rendering the template."""
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context = super(SetupView, self).get_context_data(**kwargs)
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setup_helper = self.kwargs['setup_helper']
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context['setup_helper'] = setup_helper
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context['app_info'] = setup_helper.module.app.info
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# Report any installed conflicting packages that will be removed.
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package_conflicts, package_conflicts_action = \
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setup_helper.get_package_conflicts()
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context['package_conflicts'] = package_conflicts
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context['package_conflicts_action'] = package_conflicts_action
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# Reuse the value of setup_state throughout the view for consistency.
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context['setup_state'] = setup_helper.get_state()
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context['setup_current_operation'] = setup_helper.current_operation
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# Perform expensive operation only if needed.
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if not context['setup_current_operation']:
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context[
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'package_manager_is_busy'] = package.is_package_manager_busy()
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context['refresh_page_sec'] = None
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if context['setup_state'] == 'up-to-date':
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context['refresh_page_sec'] = 0
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elif context['setup_current_operation']:
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context['refresh_page_sec'] = 3
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return context
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def dispatch(self, request, *args, **kwargs):
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if request.method == 'POST':
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if 'install' in request.POST:
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# Handle installing/upgrading applications.
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# Start the application setup, and refresh the page every few
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# seconds to keep displaying the status.
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self.kwargs['setup_helper'].run_in_thread()
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# Give a moment for the setup process to start and show
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# meaningful status.
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time.sleep(1)
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response = self.render_to_response(self.get_context_data())
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# Post/Response/Get pattern for reloads
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response.status_code = 303
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return response
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if 'refresh-packages' in request.POST:
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# Refresh apt package lists
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package.refresh_package_lists()
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return self.render_to_response(self.get_context_data())
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return super(SetupView, self).dispatch(request, *args, **kwargs)
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def notification_dismiss(request, id):
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"""Dismiss a notification."""
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from .notification import Notification
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notes = Notification.list(key=id, user=request.user)
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if not notes:
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raise Http404
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notes[0].dismiss()
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return HttpResponseRedirect(_get_redirect_url_from_param(request))
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def render_tabs(request_path, tab_data):
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"""Generate a Bootstrap tab group and return the raw HTML
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:param request_path: value of `request.path`
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:param tab_data: a list of (page_name, link_text) tuples
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:returns: raw HTML of the tabs
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"""
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sb = io.StringIO()
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sb.write('<ul class="nav nav-tabs">')
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for page_name, link_text in tab_data:
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cls = 'active' if request_path.endswith('/' + page_name) else ''
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href = '#' if cls == 'active' else ('./' + page_name)
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# -- Begin list
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sb.write('<li class="nav-item">')
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# -- Begin link
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sb.write('<a class="nav-link {}" '.format(cls))
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sb.write('href="{}">'.format(escape(href)))
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sb.write('{}</a>'.format(escape(link_text)))
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# -- End link
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sb.write('</li>')
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# -- End list
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sb.write('</ul>')
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return sb.getvalue()
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