Add invoice logo

src/pretix/base/services/invoices.py

@@ -14,6 +14,7 @@ from django.utils.translation import pgettext, ugettext as _
 from reportlab.lib import pagesizes
 from reportlab.lib.styles import ParagraphStyle, StyleSheet1
 from reportlab.lib.units import mm
+from reportlab.lib.utils import ImageReader
 from reportlab.pdfbase import pdfmetrics
 from reportlab.pdfbase.ttfonts import TTFont
 from reportlab.platypus import (
@@ -252,6 +253,13 @@ def _invoice_generate_german(invoice, f):
         textobject.textLine(date_format(invoice.order.datetime, "DATE_FORMAT"))
         canvas.drawText(textobject)
 
+        if invoice.event.settings.invoice_logo_image:
+            logo_file = invoice.event.settings.get('invoice_logo_image', binary_file=True)
+            canvas.drawImage(ImageReader(logo_file),
+                             95 * mm, (297 - 38) * mm,
+                             width=25 * mm, height=25 * mm,
+                             preserveAspectRatio=True, anchor='n')
+
         textobject = canvas.beginText(125 * mm, (297 - 15) * mm)
         textobject.setFont('OpenSansBd', 8)
         textobject.textLine(_('Event').upper())

src/pretix/base/settings.py

@@ -301,6 +301,10 @@ Your {event} team"""))
         'default': None,
         'type': File
     },
+    'invoice_logo_image': {
+        'default': None,
+        'type': File
+    },
     'frontpage_text': {
         'default': '',
         'type': LazyI18nString
@@ -361,7 +365,7 @@ class SettingsProxy:
             settings[key] = self.get(key)
         return settings
 
-    def _unserialize(self, value: str, as_type: type) -> Any:
+    def _unserialize(self, value: str, as_type: type, binary_file=False) -> Any:
         if as_type is None and value is not None and value.startswith('file://'):
             as_type = File
 
@@ -377,7 +381,7 @@ class SettingsProxy:
             return value == 'True'
         elif as_type == File:
             try:
-                fi = default_storage.open(value[7:], 'r')
+                fi = default_storage.open(value[7:], 'rb' if binary_file else 'r')
                 fi.url = default_storage.url(value[7:])
                 return fi
             except OSError:
@@ -416,7 +420,7 @@ class SettingsProxy:
 
         raise TypeError('Unable to serialize %s into a setting.' % str(type(value)))
 
-    def get(self, key: str, default=None, as_type: type=None):
+    def get(self, key: str, default=None, as_type: type=None, binary_file=False):
         """
         Get a setting specified by key ``key``. Normally, settings are strings, but
         if you put non-strings into the settings object, you can request unserialization
@@ -442,7 +446,7 @@ class SettingsProxy:
             if value is None and default is not None:
                 value = default
 
-        return self._unserialize(value, as_type)
+        return self._unserialize(value, as_type, binary_file=binary_file)
 
     def __getitem__(self, key: str) -> Any:
         return self.get(key)

src/pretix/control/forms/event.py

@@ -361,6 +361,13 @@ class InvoiceSettingsForm(SettingsForm):
         label=_("Invoice language"),
         choices=[('__user__', _('The user\'s language'))] + settings.LANGUAGES,
     )
+    invoice_logo_image = ExtFileField(
+        label=_('Logo image'),
+        ext_whitelist=(".png", ".jpg", ".svg", ".gif", ".jpeg"),
+        required=False,
+        help_text=_('If you provide a logo image, we will not show your events name and date on the invoice'
+                    'the page header. We will show your logo with a maximal height and width of 2.5 cm.')
+    )
 
 
 class MailSettingsForm(SettingsForm):

src/pretix/control/templates/pretixcontrol/event/invoicing.html

@@ -17,6 +17,7 @@
             {% bootstrap_field form.invoice_introductory_text layout="horizontal" %}
             {% bootstrap_field form.invoice_additional_text layout="horizontal" %}
             {% bootstrap_field form.invoice_footer_text layout="horizontal" %}
+            {% bootstrap_field form.invoice_logo_image layout="horizontal" %}
         </fieldset>
         <div class="form-group submit-group">
             <button type="submit" class="btn btn-default btn-lg" name="preview" value="preview" formtarget="_blank">