pretix Community Edition moves to AGPLv3-based license (#2023)

src/pretix/base/context.py

@@ -1,12 +1,77 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
 import sys
 
 from django.conf import settings
+from django.urls import reverse
+from django.utils.safestring import mark_safe
+from django.utils.translation import gettext
+
+from pretix.base.settings import GlobalSettingsObject
+from pretix.base.templatetags.safelink import safelink as sl
+
+
+def get_powered_by(safelink=True):
+    gs = GlobalSettingsObject()
+    d = gs.settings.license_check_input
+    if d.get('poweredby_name'):
+        if d.get('poweredby_url'):
+            n = '<a href="{}" target="_blank" rel="noopener">{}</a>'.format(
+                sl(d['poweredby_url']) if safelink else d['poweredby_url'],
+                d['poweredby_name']
+            )
+        else:
+            n = d['poweredby_name']
+
+        msg = gettext('powered by {name} based on <a {a_attr}>pretix</a>').format(
+            name=n,
+            a_attr='href="{}" target="_blank" rel="noopener"'.format(
+                sl('https://pretix.eu') if safelink else 'https://pretix.eu',
+            )
+        )
+    else:
+        msg = gettext('<a %(a_attr)s>ticketing powered by pretix</a>') % {
+            'a_attr': 'href="{}" target="_blank" rel="noopener"'.format(
+                sl('https://pretix.eu') if safelink else 'https://pretix.eu',
+            )
+        }
+
+    if d.get('base_license') == 'agpl':
+        msg += ' (<a href="{}" target="_blank" rel="noopener">{}</a>)'.format(
+            reverse('source'),
+            gettext('source code')
+        )
+
+    return mark_safe(msg)
 
 
 def contextprocessor(request):
     ctx = {
         'rtl': getattr(request, 'LANGUAGE_CODE', 'en') in settings.LANGUAGES_RTL,
     }
+    try:
+        ctx['poweredby'] = get_powered_by(safelink=True)
+    except Exception:
+        ctx['poweredby'] = 'powered by <a href="https://pretix.eu/" target="_blank" rel="noopener">pretix</a>'
     if settings.DEBUG and 'runserver' not in sys.argv:
         ctx['debug_warning'] = True
     elif 'runserver' in sys.argv: