From 450526565e92a5c914268bfcc653a95b44752393 Mon Sep 17 00:00:00 2001
From: "(quasar) nebula" <qznebula@protonmail.com>
Date: Wed, 16 Apr 2025 18:10:39 -0300
Subject: data: Artwork.{isMainArtwork,mainArtwork,siblingArtworks}

---
 src/data/composite/things/artwork/index.js         |  1 +
 .../things/artwork/withContainingArtworkList.js    | 46 ++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 src/data/composite/things/artwork/withContainingArtworkList.js

(limited to 'src/data/composite/things')

diff --git a/src/data/composite/things/artwork/index.js b/src/data/composite/things/artwork/index.js
index b92bff72..e2661b50 100644
--- a/src/data/composite/things/artwork/index.js
+++ b/src/data/composite/things/artwork/index.js
@@ -1 +1,2 @@
+export {default as withContainingArtworkList} from './withContainingArtworkList.js';
 export {default as withDate} from './withDate.js';
diff --git a/src/data/composite/things/artwork/withContainingArtworkList.js b/src/data/composite/things/artwork/withContainingArtworkList.js
new file mode 100644
index 00000000..9c928ffd
--- /dev/null
+++ b/src/data/composite/things/artwork/withContainingArtworkList.js
@@ -0,0 +1,46 @@
+// Gets the list of artworks which contains this one, which is functionally
+// equivalent to `this.thing[this.thingProperty]`. If the exposed value is not
+// a list at all (i.e. the property holds a single artwork), this composition
+// outputs null.
+
+import {input, templateCompositeFrom} from '#composite';
+
+import {raiseOutputWithoutDependency} from '#composite/control-flow';
+import {withPropertyFromObject} from '#composite/data';
+
+export default templateCompositeFrom({
+  annotation: `withContainingArtworkList`,
+
+  outputs: ['#containingArtworkList'],
+
+  steps: () => [
+    raiseOutputWithoutDependency({
+      dependency: 'thing',
+      output: input.value({'#containingArtworkList': null}),
+    }),
+
+    raiseOutputWithoutDependency({
+      dependency: 'thingProperty',
+      output: input.value({'#containingArtworkList': null}),
+    }),
+
+    withPropertyFromObject({
+      object: 'thing',
+      property: 'thingProperty',
+    }).outputs({
+      '#value': '#containingValue',
+    }),
+
+    {
+      dependencies: ['#containingValue'],
+      compute: (continuation, {
+        ['#containingValue']: containingValue,
+      }) => continuation({
+        ['#containingArtworkList']:
+          (Array.isArray(containingValue)
+            ? containingValue
+            : null),
+      }),
+    },
+  ],
+});
-- 
cgit 1.3.0-6-gf8a5