From d115facf1595dce02fc18dfd78d5961e8ed6c68a Mon Sep 17 00:00:00 2001
From: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Date: Thu, 18 Apr 2024 13:45:55 +0100
Subject: [PATCH] Bug 36641: Add endpoint for fetching circulation rules

This patch is a proof of concept for an API endpoint that returns a list
of circulation rules for the specified itemtype, branchcode and patron
category combination.  You can also add a list of `rules` as a query
parameter to limit the response to only the rules you are interested in
for this combination.
---
 Koha/REST/V1/CirculationRules.pm            | 30 +++++++++++
 api/v1/swagger/paths/circulation-rules.yaml | 55 +++++++++++++++++++++
 api/v1/swagger/swagger.yaml                 |  2 +
 3 files changed, 87 insertions(+)

diff --git a/Koha/REST/V1/CirculationRules.pm b/Koha/REST/V1/CirculationRules.pm
index 636985fba64..f692181c0ac 100644
--- a/Koha/REST/V1/CirculationRules.pm
+++ b/Koha/REST/V1/CirculationRules.pm
@@ -41,4 +41,34 @@ sub get_kinds {
     );
 }
 
+
+=head3 list_effective_rules
+
+List all effective rules for the requested patron/item/branch combination
+
+=cut
+
+sub list_effective_rules {
+    my $c = shift->openapi->valid_input or return;
+
+    my $item_type       = $c->param('itemtype');
+    my $library         = $c->param('library');
+    my $patron_category = $c->param('category');
+    my $rules           = $c->param('rules') // [ keys %{Koha::CirculationRules->rule_kinds} ];
+
+    my $effective_rules = Koha::CirculationRules->get_effective_rules(
+        {
+            categorycode => $patron_category,
+            itemtype     => $item_type,
+            branchcode   => $library,
+            rules => $rules
+        }
+    );
+
+    return $c->render(
+        status  => 200,
+        openapi => $effective_rules
+    );
+}
+
 1;
diff --git a/api/v1/swagger/paths/circulation-rules.yaml b/api/v1/swagger/paths/circulation-rules.yaml
index 545f15458a9..742227932d6 100644
--- a/api/v1/swagger/paths/circulation-rules.yaml
+++ b/api/v1/swagger/paths/circulation-rules.yaml
@@ -30,3 +30,58 @@
         description: Under maintenance
         schema:
           $ref: "../swagger.yaml#/definitions/error"
+/circulation-rules/{itemtype}/{library}/{category}:
+  get:
+    x-mojo-to: CirculationRules#list_effective_rules
+    operationId: listCirculationRules
+    tags:
+      - circulation_rules
+    summary: Get circulation rules for this item/library/patron combination
+    produces:
+      - application/json
+    parameters:
+      - name: itemtype
+        in: path
+        description: The itemtype
+        required: true
+        type: string
+      - name: library
+        in: path
+        description: The library code
+        required: true
+        type: string
+      - name: category
+        in: path
+        description: The patron category
+        required: true
+        type: string
+      - name: rules
+        in: query
+        description: A comma-separated list of rule kinds
+        type: array
+        items:
+          type: string
+        collectionFormat: csv
+    responses:
+      "200":
+        description: A list of rules for this itemtype, library and patron category combination
+        schema:
+          type: object
+      "403":
+        description: Access forbidden
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "500":
+        description: |
+          Internal server error. Possible `error_code` attribute values:
+
+          * `internal_server_error`
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "503":
+        description: Under maintenance
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+    x-koha-authorization:
+      permissions:
+        - circulate: circulate_remaining_permissions
diff --git a/api/v1/swagger/swagger.yaml b/api/v1/swagger/swagger.yaml
index 8b80908dcd1..e75941485b4 100644
--- a/api/v1/swagger/swagger.yaml
+++ b/api/v1/swagger/swagger.yaml
@@ -269,6 +269,8 @@ paths:
     $ref: "./paths/checkouts.yaml#/~1checkouts~1availability"
   /circulation-rules/kinds:
     $ref: ./paths/circulation-rules.yaml#/~1circulation-rules~1kinds
+  /circulation-rules/{itemtype}/{library}/{category}:
+    $ref: ./paths/circulation-rules.yaml#/~1circulation-rules~1{itemtype}~1{library}~1{category}
   /cities:
     $ref: ./paths/cities.yaml#/~1cities
   "/cities/{city_id}":
-- 
2.44.0