From ab7a0d92a18de080270ebd81a3582f2caa1a79da Mon Sep 17 00:00:00 2001
From: Tomas Cohen Arazi <tomascohen@theke.io>
Date: Wed, 6 Jan 2021 12:00:40 -0300
Subject: [PATCH] Bug 27352: Add GET /biblios/:biblio_id/items

This patch adds a route to fetch the items for a biblio. It relies
entirely on already existing methods.

To test:
1. Use your favourite REST tool
2. Play with the new route.
=> SUCCESS: It works as expected!

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
---
 Koha/REST/V1/Biblios.pm           | 34 +++++++++++
 api/v1/swagger/paths.json         |  9 ++-
 api/v1/swagger/paths/biblios.json | 98 +++++++++++++++++++++++++++++++
 3 files changed, 138 insertions(+), 3 deletions(-)

diff --git a/Koha/REST/V1/Biblios.pm b/Koha/REST/V1/Biblios.pm
index 157282b4a1..4e803b1988 100644
--- a/Koha/REST/V1/Biblios.pm
+++ b/Koha/REST/V1/Biblios.pm
@@ -237,4 +237,38 @@ sub get_public {
     };
 }
 
+=head3 get_items
+
+Controller function that handles retrieving biblio's items
+
+=cut
+
+sub get_items {
+    my $c = shift->openapi->valid_input or return;
+
+    my $biblio = Koha::Biblios->find( { biblionumber => $c->validation->param('biblio_id') }, { prefetch => ['items'] } );
+
+    unless ( $biblio ) {
+        return $c->render(
+            status  => 404,
+            openapi => {
+                error => "Object not found."
+            }
+        );
+    }
+
+    return try {
+
+        my $items_rs = $biblio->items;
+        my $items    = $c->objects->search( $items_rs );
+        return $c->render(
+            status  => 200,
+            openapi => $items
+        );
+    }
+    catch {
+        $c->unhandled_exception($_);
+    };
+}
+
 1;
diff --git a/api/v1/swagger/paths.json b/api/v1/swagger/paths.json
index 3b5dc352d5..e871e54ed4 100644
--- a/api/v1/swagger/paths.json
+++ b/api/v1/swagger/paths.json
@@ -17,6 +17,12 @@
   "/acquisitions/funds": {
     "$ref": "paths/acquisitions_funds.json#/~1acquisitions~1funds"
   },
+  "/biblios/{biblio_id}": {
+    "$ref": "paths/biblios.json#/~1biblios~1{biblio_id}"
+  },
+  "/biblios/{biblio_id}/items": {
+    "$ref": "paths/biblios.json#/~1biblios~1{biblio_id}~1items"
+  },
   "/checkouts": {
     "$ref": "paths/checkouts.json#/~1checkouts"
   },
@@ -35,9 +41,6 @@
   "/cities/{city_id}": {
     "$ref": "paths/cities.json#/~1cities~1{city_id}"
   },
-  "/biblios/{biblio_id}": {
-    "$ref": "paths/biblios.json#/~1biblios~1{biblio_id}"
-  },
   "/clubs/{club_id}/holds": {
     "$ref": "paths/clubs.json#/~1clubs~1{club_id}~1holds"
   },
diff --git a/api/v1/swagger/paths/biblios.json b/api/v1/swagger/paths/biblios.json
index 4896b71f62..0b95576204 100644
--- a/api/v1/swagger/paths/biblios.json
+++ b/api/v1/swagger/paths/biblios.json
@@ -134,6 +134,104 @@
       }
     }
   },
+  "/biblios/{biblio_id}/items": {
+    "get": {
+      "x-mojo-to": "Biblios#get_items",
+      "operationId": "getBiblioItems",
+      "tags": [
+        "biblios",
+        "items"
+      ],
+      "parameters": [
+        {
+          "$ref": "../parameters.json#/biblio_id_pp"
+        },
+        {
+          "$ref": "../parameters.json#/match"
+        },
+        {
+          "$ref": "../parameters.json#/order_by"
+        },
+        {
+          "$ref": "../parameters.json#/page"
+        },
+        {
+          "$ref": "../parameters.json#/per_page"
+        },
+        {
+          "$ref": "../parameters.json#/q_param"
+        },
+        {
+          "$ref": "../parameters.json#/q_body"
+        },
+        {
+          "$ref": "../parameters.json#/q_header"
+        }
+      ],
+      "consumes": [
+        "application/json"
+      ],
+      "produces": [
+        "application/json"
+      ],
+      "responses": {
+        "200": {
+          "description": "A list of the items attached to the record",
+          "schema": {
+            "type": "array",
+            "items": {
+              "$ref": "../definitions.json#/item"
+            }
+          }
+        },
+        "401": {
+          "description": "Authentication required",
+          "schema": {
+            "$ref": "../definitions.json#/error"
+          }
+        },
+        "403": {
+          "description": "Access forbidden",
+          "schema": {
+            "$ref": "../definitions.json#/error"
+          }
+        },
+        "404": {
+          "description": "Biblio not found",
+          "schema": {
+            "$ref": "../definitions.json#/error"
+          }
+        },
+        "406": {
+          "description": "Not acceptable",
+          "schema": {
+            "type": "array",
+            "description": "Accepted content-types",
+            "items": {
+                "type": "string"
+            }
+          }
+        },
+        "500": {
+          "description": "Internal server error",
+          "schema": {
+            "$ref": "../definitions.json#/error"
+          }
+        },
+        "503": {
+          "description": "Under maintenance",
+          "schema": {
+            "$ref": "../definitions.json#/error"
+          }
+        }
+      },
+      "x-koha-authorization": {
+        "permissions": {
+            "catalogue": "1"
+        }
+      }
+    }
+  },
   "/public/biblios/{biblio_id}": {
     "get": {
       "x-mojo-to": "Biblios#get_public",
-- 
2.30.0