items: can request api for an item

* Removes duplicate fixtures function.
* Adds sort on pickup_name location

Co-Authored-by: Bertrand Zuchuat <[email protected]>
Co-Authored-by: Aly Badr <[email protected]>

rero_ils/config.py

@@ -1208,6 +1208,10 @@ def _(x):
     fields=['name'], title='Location name',
     default_order='asc'
 )
+RECORDS_REST_SORT_OPTIONS['locations']['pickup_name'] = dict(
+    fields=['pickup_name'], title='Pickup Location name',
+    default_order='asc'
+)
 RECORDS_REST_DEFAULT_SORT['locations'] = dict(
     query='bestmatch', noquery='name')
 

rero_ils/modules/items/api_views.py

@@ -28,11 +28,11 @@
 from invenio_circulation.errors import CirculationException
 from werkzeug.exceptions import NotFound
 
-from .api import Item
-from .utils import is_librarian_can_request_item_for_patron
+from .api import Item, ItemStatus
 from ..circ_policies.api import CircPolicy
 from ..libraries.api import Library
 from ..loans.api import Loan
+from ..loans.utils import can_be_requested
 from ..patrons.api import Patron
 from ...permissions import librarian_permission
 
@@ -337,3 +337,45 @@ def can_request(item_pid, library_pid, patron_barcode):
     """
     return is_librarian_can_request_item_for_patron(
         item_pid, library_pid, patron_barcode)
+
+
+def jsonify_response(response=False, reason=None):
+    """Jsonify api response."""
+    return jsonify({
+        'can_request': response,
+        'reason': reason
+    })
+
+
+def is_librarian_can_request_item_for_patron(
+        item_pid, library_pid, patron_barcode):
+    """Check if a librarian can request an item for a patron.
+
+    required_parameters: item_pid, library_pid, patron_barcode
+    """
+    item = Item.get_record_by_pid(item_pid)
+    if not item:
+        return jsonify_response(reason='Item not found.')
+    patron = Patron.get_patron_by_barcode(patron_barcode)
+    if not patron:
+        return jsonify_response(reason='Patron not found.')
+    library = Library.get_record_by_pid(library_pid)
+    if not library:
+        return jsonify_response(reason='Library not found.')
+    # Create a loan
+    loan = Loan({
+        'patron_pid': patron.pid, 'item_pid': item.pid,
+        'library_pid': library_pid})
+    if not can_be_requested(loan):
+        return jsonify_response(
+            reason='Circulation policies do not allow request on this item.')
+    if item.status != ItemStatus.MISSING:
+        loaned_to_patron = item.is_loaned_to_patron(patron_barcode)
+        if loaned_to_patron:
+            return jsonify_response(
+                reason='Item is already checked-out or requested by patron.')
+        return jsonify_response(
+            response=True, reason='Request is possible.')
+    else:
+        return jsonify_response(
+            reason='Item status does not allow requests.')