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https://github.com/pretix/pretix.git
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Move PDF editor out of plugin and into core
This commit is contained in:
Raphael Michel
198
src/pretix/control/views/pdf.py
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198
src/pretix/control/views/pdf.py
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import json
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import logging
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import mimetypes
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from datetime import timedelta
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from django.core.files import File
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from django.core.files.storage import default_storage
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from django.http import (
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FileResponse, HttpResponse, HttpResponseBadRequest, JsonResponse,
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)
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from django.shortcuts import get_object_or_404
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from django.urls import reverse
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from django.utils.crypto import get_random_string
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from django.utils.timezone import now
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from django.utils.translation import ugettext as _
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from django.views.generic import TemplateView
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from pretix.base.i18n import language
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from pretix.base.models import CachedFile, InvoiceAddress, OrderPosition
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from pretix.base.pdf import get_variables
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from pretix.control.permissions import EventPermissionRequiredMixin
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from pretix.helpers.database import rolledback_transaction
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from pretix.presale.style import get_fonts
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logger = logging.getLogger(__name__)
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class BaseEditorView(EventPermissionRequiredMixin, TemplateView):
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template_name = 'pretixcontrol/pdf/index.html'
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permission = 'can_change_settings'
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accepted_formats = (
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'application/pdf',
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)
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maxfilesize = 1024 * 1024 * 10
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minfilesize = 10
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title = None
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def get(self, request, *args, **kwargs):
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resp = super().get(request, *args, **kwargs)
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resp._csp_ignore = True
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return resp
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def process_upload(self):
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f = self.request.FILES.get('background')
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error = False
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if f.size > self.maxfilesize:
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error = _('The uploaded PDF file is to large.')
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if f.size < self.minfilesize:
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error = _('The uploaded PDF file is to small.')
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if mimetypes.guess_type(f.name)[0] not in self.accepted_formats:
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error = _('Please only upload PDF files.')
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# if there was an error, add error message to response_data and return
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if error:
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return error, None
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return None, f
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def _get_preview_position(self):
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item = self.request.event.items.create(name=_("Sample product"), default_price=42.23,
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description=_("Sample product description"))
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item2 = self.request.event.items.create(name=_("Sample workshop"), default_price=23.40)
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from pretix.base.models import Order
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order = self.request.event.orders.create(status=Order.STATUS_PENDING, datetime=now(),
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email='sample@pretix.eu',
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locale=self.request.event.settings.locale,
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expires=now(), code="PREVIEW1234", total=119)
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p = order.positions.create(item=item, attendee_name=_("John Doe"), price=item.default_price)
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order.positions.create(item=item2, attendee_name=_("John Doe"), price=item.default_price, addon_to=p)
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order.positions.create(item=item2, attendee_name=_("John Doe"), price=item.default_price, addon_to=p)
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InvoiceAddress.objects.create(order=order, name=_("John Doe"), company=_("Sample company"))
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return p
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def generate(self, p: OrderPosition, override_layout=None, override_background=None):
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raise NotImplemented
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def get_layout_settings_key(self):
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raise NotImplemented
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def get_background_settings_key(self):
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raise NotImplemented
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def get_default_background(self):
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raise NotImplemented
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def get_current_background(self):
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return (
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self.request.event.settings.get(self.get_background_settings_key()).url
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if self.request.event.settings.get(self.get_background_settings_key())
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else self.get_default_background()
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)
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def get_current_layout(self):
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return self.request.event.settings.get(self.get_layout_settings_key(), as_type=list)
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def save_layout(self):
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self.request.event.settings.set(self.get_layout_settings_key(), self.request.POST.get("data"))
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def save_background(self, f: CachedFile):
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fexisting = self.request.event.settings.get(self.get_background_settings_key(), as_type=File)
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if fexisting:
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try:
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default_storage.delete(fexisting.name)
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except OSError: # pragma: no cover
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logger.error('Deleting file %s failed.' % fexisting.name)
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# Create new file
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nonce = get_random_string(length=8)
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fname = 'pub/%s-%s/%s/%s.%s.%s' % (
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'event', 'settings', self.request.event.pk, self.get_layout_settings_key(), nonce, 'pdf'
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)
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newname = default_storage.save(fname, f.file)
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self.request.event.settings.set(self.get_background_settings_key(), 'file://' + newname)
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def post(self, request, *args, **kwargs):
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if "background" in request.FILES:
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error, fileobj = self.process_upload()
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if error:
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return JsonResponse({
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"status": "error",
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"error": error
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})
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c = CachedFile()
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c.expires = now() + timedelta(days=7)
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c.date = now()
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c.filename = 'background_preview.pdf'
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c.type = 'application/pdf'
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c.file = fileobj
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c.save()
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c.refresh_from_db()
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return JsonResponse({
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"status": "ok",
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"id": c.id,
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"url": reverse('control:pdf.background', kwargs={
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'event': request.event.slug,
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'organizer': request.organizer.slug,
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'filename': str(c.id)
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})
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})
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cf = None
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if request.POST.get("background", "").strip():
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try:
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cf = CachedFile.objects.get(id=request.POST.get("background"))
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except CachedFile.DoesNotExist:
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pass
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if "preview" in request.POST:
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with rolledback_transaction(), language(request.event.settings.locale):
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p = self._get_preview_position()
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fname, mimet, data = self.generate(
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p,
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override_layout=(json.loads(self.request.POST.get("data"))
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if self.request.POST.get("data") else None),
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override_background=cf.file if cf else None
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)
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resp = HttpResponse(data, content_type=mimet)
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ftype = fname.split(".")[-1]
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resp['Content-Disposition'] = 'attachment; filename="ticket-preview.{}"'.format(ftype)
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return resp
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elif "data" in request.POST:
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if cf:
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self.save_background(cf)
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self.save_layout()
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return JsonResponse({'status': 'ok'})
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return HttpResponseBadRequest()
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def get_variables(self):
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return get_variables(self.request.event)
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def get_context_data(self, **kwargs):
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ctx = super().get_context_data(**kwargs)
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ctx['fonts'] = get_fonts()
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ctx['pdf'] = self.get_current_background()
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ctx['variables'] = self.get_variables()
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ctx['layout'] = json.dumps(self.get_current_layout())
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ctx['title'] = self.title
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return ctx
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class FontsCSSView(TemplateView):
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content_type = 'text/css'
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template_name = 'pretixcontrol/pdf/webfonts.css'
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def get_context_data(self, **kwargs):
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ctx = super().get_context_data(**kwargs)
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ctx['fonts'] = get_fonts()
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return ctx
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class PdfView(TemplateView):
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def get(self, request, *args, **kwargs):
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cf = get_object_or_404(CachedFile, id=kwargs.get("filename"), filename="background_preview.pdf")
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resp = FileResponse(cf.file, content_type='application/pdf')
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resp['Content-Disposition'] = 'attachment; filename="{}"'.format(cf.filename)
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return resp
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