44ff02b7af
* add `can_cancel` flag for progress page, hide button if set * overhaul populate/refresh/execute to launch socket/subprocess if necessary
116 lines
3.9 KiB
Python
116 lines
3.9 KiB
Python
# -*- coding: utf-8; -*-
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################################################################################
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#
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# Rattail -- Retail Software Framework
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# Copyright © 2010-2018 Lance Edgar
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#
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# This file is part of Rattail.
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#
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# Rattail is free software: you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Rattail. If not, see <http://www.gnu.org/licenses/>.
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#
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################################################################################
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"""
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Base View Class
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"""
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from __future__ import unicode_literals, absolute_import
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import os
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import six
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from rattail.db import model
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from rattail.util import progress_loop
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from pyramid import httpexceptions
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from pyramid.renderers import render_to_response
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from pyramid.response import FileResponse
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from tailbone.db import Session
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from tailbone.auth import logout_user
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class View(object):
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"""
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Base class for all class-based views.
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"""
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def __init__(self, request):
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self.request = request
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# if user becomes inactive while logged in, log them out
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if getattr(request, 'user', None):
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# TODO: why is the user sometimes not attached to session?
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# (this has only been seen on mobile, when creating a new ordering batch)
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if request.user not in Session():
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request.user = Session.merge(request.user)
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if not request.user.active:
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headers = logout_user(request)
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raise self.redirect(request.route_url('home'))
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config = self.rattail_config
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if config:
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self.enum = config.get_enum()
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@property
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def rattail_config(self):
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"""
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Reference to the effective Rattail config object.
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"""
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return getattr(self.request, 'rattail_config', None)
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def notfound(self):
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return httpexceptions.HTTPNotFound()
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def late_login_user(self):
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"""
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Returns the :class:`rattail:rattail.db.model.User` instance
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corresponding to the "late login" form data (if any), or ``None``.
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"""
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if self.request.method == 'POST':
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uuid = self.request.POST.get('late-login-user')
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if uuid:
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return Session.query(model.User).get(uuid)
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def redirect(self, url, **kwargs):
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"""
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Convenience method to return a HTTP 302 response.
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"""
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return httpexceptions.HTTPFound(location=url, **kwargs)
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def progress_loop(self, func, items, factory, *args, **kwargs):
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return progress_loop(func, items, factory, *args, **kwargs)
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# TODO: this signature seems wonky
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def render_progress(self, progress, kwargs, template=None):
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"""
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Render the progress page, with given kwargs as context.
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"""
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if not template:
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template = '/progress.mako'
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kwargs['progress'] = progress
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kwargs.setdefault('can_cancel', True)
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return render_to_response(template, kwargs, request=self.request)
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def file_response(self, path):
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"""
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Returns a generic FileResponse from the given path
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"""
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if not os.path.exists(path):
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return self.notfound()
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response = FileResponse(path, request=self.request)
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response.headers[b'Content-Length'] = six.binary_type(os.path.getsize(path))
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filename = os.path.basename(path).encode('ascii', 'replace')
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response.headers[b'Content-Disposition'] = b'attachment; filename="{}"'.format(filename)
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return response
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