Generalize import process from orders to more models (#4002)

* Generalize import process from orders to more models

* Add voucher import

* Model import: Guess assignments of based on column headers

* Fix lock_seats being pointless

* Update docs

* Update doc/development/api/import.rst

Co-authored-by: Richard Schreiber <schreiber@rami.io>

* Update src/pretix/base/modelimport_vouchers.py

Co-authored-by: Richard Schreiber <schreiber@rami.io>

---------

Co-authored-by: Richard Schreiber <schreiber@rami.io>

src/tests/control/test_modelimport.py

@@ -0,0 +1,87 @@
+#
+# 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 pytest
+from bs4 import BeautifulSoup
+from django.core.files.uploadedfile import SimpleUploadedFile
+from django.utils.timezone import now
+
+from pretix.base.models import Event, Organizer, Team, User
+
+
+@pytest.fixture
+def env():
+    o = Organizer.objects.create(name='Dummy', slug='dummy')
+    event = Event.objects.create(
+        organizer=o, name='Dummy', slug='dummy',
+        date_from=now(), plugins='pretix.plugins.banktransfer,pretix.plugins.paypal'
+    )
+    user = User.objects.create_user('dummy@dummy.dummy', 'dummy')
+    t = Team.objects.create(organizer=event.organizer, can_view_orders=True, can_change_orders=True,
+                            can_change_vouchers=True)
+    t.members.add(user)
+    t.limit_events.add(event)
+    return event, user
+
+
+@pytest.mark.django_db
+def test_orders_import_csv_file(client, env):
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    r = client.get('/control/event/dummy/dummy/orders/import/')
+    assert r.status_code == 200
+
+    file = SimpleUploadedFile('file.csv', """First name,Last name,Email
+Dieter,Schneider,schneider@example.org
+Daniel,Wulf,daniel@example.org
+Daniel,Wulf,daniel@example.org
+Anke,Müller,anke@example.net
+
+""".encode("utf-8"), content_type="text/csv")
+
+    r = client.post('/control/event/dummy/dummy/orders/import/', {
+        'file': file
+    }, follow=True)
+    doc = BeautifulSoup(r.content, "lxml")
+    assert doc.select("select[name=orders]")
+    assert doc.select("select[name=status]")
+    assert doc.select("select[name=attendee_email]")
+    assert b"Dieter" in r.content
+    assert b"daniel@example.org" in r.content
+    assert b"Anke" not in r.content
+
+
+@pytest.mark.django_db
+def test_vouchers_import_csv_file(client, env):
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    r = client.get('/control/event/dummy/dummy/vouchers/import/')
+    assert r.status_code == 200
+
+    file = SimpleUploadedFile('file.csv', """Code,Product
+ABC123,Ticket
+
+""".encode("utf-8"), content_type="text/csv")
+
+    r = client.post('/control/event/dummy/dummy/vouchers/import/', {
+        'file': file
+    }, follow=True)
+    doc = BeautifulSoup(r.content, "lxml")
+    assert doc.select("select[name=code]")
+    assert b"ABC123" in r.content