From 73a8f6c8e05d650933602bd80124f08006d3d381 Mon Sep 17 00:00:00 2001
From: Fatimah <fatimah.zulfiqar@cern.ch>
Date: Fri, 1 Mar 2024 10:34:05 +0100
Subject: [PATCH] custom_fields: added subject field

---
 .../services/custom_fields/__init__.py        |  6 +-
 .../services/custom_fields/subject.py         | 80 +++++++++++++++++++
 2 files changed, 85 insertions(+), 1 deletion(-)
 create mode 100644 invenio_vocabularies/services/custom_fields/subject.py

diff --git a/invenio_vocabularies/services/custom_fields/__init__.py b/invenio_vocabularies/services/custom_fields/__init__.py
index 1ce96f3c..6044dbaa 100644
--- a/invenio_vocabularies/services/custom_fields/__init__.py
+++ b/invenio_vocabularies/services/custom_fields/__init__.py
@@ -7,6 +7,10 @@
 
 """Custom Fields for InvenioRDM."""
 
+from .subject import SUBJECT_FIELDS, SUBJECT_FIELDS_UI
 from .vocabulary import VocabularyCF
 
-__all__ = "VocabularyCF"
+__all__ = [
+    "VocabularyCF",
+    "SUBJECT_FIELDS_UI" "SUBJECT_FIELDS",
+]
diff --git a/invenio_vocabularies/services/custom_fields/subject.py b/invenio_vocabularies/services/custom_fields/subject.py
new file mode 100644
index 00000000..d922b4a8
--- /dev/null
+++ b/invenio_vocabularies/services/custom_fields/subject.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2024 CERN.
+#
+# Invenio-RDM-Records is free software; you can redistribute it and/or modify
+# it under the terms of the MIT License; see LICENSE file for more details.
+
+
+"""Custom fields."""
+from invenio_i18n import lazy_gettext as _
+
+from ...contrib.subjects.api import Subject
+from ...contrib.subjects.schema import SubjectRelationSchema
+from .vocabulary import VocabularyCF
+
+
+class SubjectCF(VocabularyCF):
+    """Custom field for subjects."""
+
+    field_keys = ["id", "subject"]
+
+    def __init__(self, **kwargs):
+        """Constructor."""
+        super().__init__(
+            vocabulary_id="subjects",
+            schema=SubjectRelationSchema,
+            ui_schema=SubjectRelationSchema,
+            **kwargs
+        )
+        self.pid_field = Subject.pid
+
+    @property
+    def mapping(self):
+        """Return the mapping."""
+        _mapping = {
+            "type": "object",
+            "properties": {
+                "@v": {"type": "keyword"},
+                "id": {"type": "keyword"},
+                "subject": {"type": "keyword"},
+            },
+        }
+
+        return _mapping
+
+
+SUBJECT_FIELDS_UI = [
+    {
+        "section": _("Subjects"),
+        "fields": [
+            dict(
+                field="subjects",
+                ui_widget="SubjectAutocompleteDropdown",
+                isGenericVocabulary=False,
+                props=dict(
+                    label="Keywords and subjects",
+                    icon="tag",
+                    description="The subjects related to the community",
+                    placeholder="Search for a subject by name e.g. Psychology ...",
+                    autocompleteFrom="api/subjects",
+                    noQueryMessage="Search for subjects...",
+                    autocompleteFromAcceptHeader="application/vnd.inveniordm.v1+json",
+                    required=False,
+                    multiple=True,
+                    clearable=True,
+                    allowAdditions=False,
+                ),
+            )
+        ],
+    }
+]
+
+
+SUBJECT_FIELDS = {
+    SubjectCF(
+        name="subjects",
+        multiple=True,
+        dump_options=False,
+    )
+}