Show name including saluation in some places (Z#23121817) (#3320)

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

src/pretix/helpers/names.py

@@ -0,0 +1,38 @@
+#
+# 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/>.
+#
+from pretix.base.settings import PERSON_NAME_SCHEMES
+
+
+def build_name(parts, concatenation=None, fallback_scheme=None):
+    if not parts:
+        return None
+    if "_legacy" in parts:
+        return parts["_legacy"]
+    if "_scheme" in parts:
+        scheme = PERSON_NAME_SCHEMES[parts["_scheme"]]
+    elif fallback_scheme:
+        scheme = PERSON_NAME_SCHEMES[fallback_scheme() if callable(fallback_scheme) else fallback_scheme]
+    else:
+        raise TypeError("Invalid name given.")
+    if not concatenation or concatenation not in scheme:
+        concatenation = "concatenation"
+    return scheme[concatenation](parts).strip()