ADD: added sub module dav_submission for supporting Manuel Hark with

his 150 Jahre DAV submission process.

dav_submission/views.py

@@ -0,0 +1,144 @@
+# -*- coding: utf-8 -*-
+import codecs
+import datetime
+import logging
+import os
+from django.apps import apps
+from django.contrib import messages
+from django.urls import reverse_lazy
+from django.utils.translation import ugettext as _
+from django.views import generic
+
+from .forms import UploadForm
+
+app_config = apps.get_containing_app_config(__package__)
+logger = logging.getLogger(__name__)
+
+
+class UploadView(generic.edit.FormView):
+    initial = {
+        # 'name': u'heinzel',
+        # 'email_address': 'heinzel@heinzelwelt.de',
+        # 'title': u'Mein Beitrag',
+        # 'description': 'Foobar',
+        # 'accepted': True,
+    }
+    template_name = 'dav_submission/upload_form.html'
+    form_class = UploadForm
+    success_url = reverse_lazy('dav_submission:success')
+
+    def _sanitize_filename(self, input):
+        max_length = None
+        discard_chars = u''
+        allowed_chars = (u'abcdefghijklmnopqrstuvwxyz'
+                         u'äöüß'
+                         u'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+                         u'ÄÖÜ'
+                         u'0123456789'
+                         u'._-')
+        non_allowed_substitute = u'_'
+        space_substitute = u'_'
+
+        if space_substitute is None:
+            space_substitute = non_allowed_substitute
+
+        r = ''
+        for c in input:
+            if c in discard_chars:
+                continue
+            elif allowed_chars is not None and c in allowed_chars:
+                r += c
+            elif allowed_chars is None and c.isalnum():
+                r += c
+            elif c.isspace():
+                r += space_substitute
+            else:
+                r += non_allowed_substitute
+
+        return r[:max_length]
+
+    def form_valid(self, form):
+        base_path = app_config.settings.upload_path
+
+        subdir_format_str = u'{datetime}--{title}'
+        now = datetime.datetime.now()
+        subdir_format_kwargs = {'datetime': now.strftime('%Y-%m-%d--%H%M%S'),
+                                'date': now.strftime('%Y-%m-%d'),
+                                'time': now.strftime('%H-%M-%S'),
+                                'title': form.cleaned_data['title']}
+        subdir_name = self._sanitize_filename(
+            subdir_format_str.format(**subdir_format_kwargs)
+        )
+        subdir_path = os.path.join(base_path, subdir_name)
+
+        if os.path.isdir(subdir_path):
+            message = _(u'Es gibt bereits einen Beitrag mit dem Titel "%(title)s".') % subdir_format_kwargs
+            messages.error(self.request, message)
+            form.add_error('title', message)
+            return self.render_to_response(self.get_context_data(form=form))
+
+        os.makedirs(subdir_path)
+
+        try:
+            metadata_format_str = u"""Absender: {name} <{email_address}>
+    Datum: {date} {time}
+    Titel: {title}
+    Beschreibung:
+    {description}
+"""
+            metadata_format_kwargs = {
+                'date': now.strftime('%d.%m.%Y'),
+                'time': now.strftime('%H:%M:%S'),
+                'name': form.cleaned_data['name'],
+                'email_address': form.cleaned_data['email_address'],
+                'title': form.cleaned_data['title'],
+                'description': form.cleaned_data['description'],
+            }
+
+            metadata = metadata_format_str.format(**metadata_format_kwargs)
+            metadata_file_name = app_config.settings.metadata_file_name
+            metadata_file_path = os.path.join(subdir_path, metadata_file_name)
+
+            with codecs.open(metadata_file_path, 'w', encoding='utf-8') as metadata_file:
+                metadata_file.write(metadata)
+        except Exception as e:
+            message = _(u'Jetzt ist irgendwas schief gelaufen.')
+            messages.error(self.request, message)
+            logger.error('dav_submission.views.UploadView.form_valid(): Catched Exception #2: %s', str(e))
+            return super(UploadView, self).form_valid(form)
+
+        try:
+            for input_file in form.files.getlist('files'):
+                file_name = self._sanitize_filename(input_file.name)
+                file_path = os.path.join(subdir_path, file_name)
+
+                if os.path.exists(file_path):
+                    message = _(u'Die Datei %(name)s haben wir bereits.') % {'name': input_file.name}
+                    messages.error(self.request, message)
+                    continue
+
+                with open(file_path, 'wb+') as local_file:
+                    for chunk in input_file.chunks():
+                        local_file.write(chunk)
+
+                size = os.path.getsize(file_path)
+                if size > (1024 * 1024):
+                    size_str = u'%s MiB' % ('%.3f' % (size / 1024.0 / 1024.0)).rstrip('0').rstrip('.')
+                elif size > 1024:
+                    size_str = u'%s KiB' % ('%.3f' % (size / 1024.0)).rstrip('0').rstrip('.')
+                else:
+                    size_str = u'%d Byte' % size
+                message = _(u'Datei erfolgreich hochgeladen: %(name)s (%(size)s)') % {'name': input_file.name,
+                                                                                      'size': size_str}
+                messages.success(self.request, message)
+        except Exception as e:
+            message = _(u'Jetzt ist irgendwas schief gelaufen.')
+            messages.error(self.request, message)
+            logger.error('dav_submission.views.UploadView.form_valid(): Catched Exception #3: %s', str(e))
+            return super(UploadView, self).form_valid(form)
+
+        return super(UploadView, self).form_valid(form)
+
+
+class SuccessView(generic.TemplateView):
+    template_name = 'dav_submission/success.html'