1 files changed, 90 insertions, 0 deletions
diff --git a/src/data/composite/wiki-properties/hasArtwork.js b/src/data/composite/wiki-properties/hasArtwork.js
new file mode 100644
index 00000000..e403a7e2
--- /dev/null
+++ b/src/data/composite/wiki-properties/hasArtwork.js
@@ -0,0 +1,90 @@
+import {input, templateCompositeFrom, V} from '#composite';
+import {isContributionList, isThing, strictArrayOf} from '#validators';
+
+import {fillMissingListItems, withFlattenedList, withPropertyFromList}
+  from '#composite/data';
+
+import {
+  exitWithoutDependency,
+  exposeWhetherDependencyAvailable,
+  withResultOfAvailabilityCheck,
+} from '#composite/control-flow';
+
+export default templateCompositeFrom({
+  annotation: 'hasArtwork',
+
+  inputs: {
+    contribs: input({
+      validate: isContributionList,
+      defaultValue: null,
+    }),
+
+    artwork: input({
+      validate: isThing,
+      defaultValue: null,
+    }),
+
+    artworks: input({
+      validate: strictArrayOf(isThing),
+      defaultValue: null,
+    }),
+  },
+
+  compose: false,
+
+  steps: () => [
+    withResultOfAvailabilityCheck({
+      from: input('contribs'),
+      mode: input.value('empty'),
+    }),
+
+    {
+      dependencies: ['#availability'],
+      compute: (continuation, {
+        ['#availability']: availability,
+      }) =>
+        (availability
+          ? true
+          : continuation()),
+    },
+
+    {
+      dependencies: [input('artwork'), input('artworks')],
+      compute: (continuation, {
+        [input('artwork')]: artwork,
+        [input('artworks')]: artworks,
+      }) =>
+        continuation({
+          ['#artworks']:
+            (artwork && artworks
+              ? [artwork, ...artworks]
+           : artwork
+              ? [artwork]
+           : artworks
+              ? artworks
+              : []),
+        }),
+    },
+
+    exitWithoutDependency('#artworks', {
+      value: input.value(false),
+      mode: input.value('empty'),
+    }),
+
+    withPropertyFromList('#artworks', {
+      property: input.value('artistContribs'),
+      internal: input.value(true),
+    }),
+
+    // Since we're getting the update value for each artwork's artistContribs,
+    // it may not be set at all, and in that case won't be exposing as [].
+    fillMissingListItems('#artworks.artistContribs', V([])),
+
+    withFlattenedList('#artworks.artistContribs'),
+
+    exposeWhetherDependencyAvailable({
+      dependency: '#flattenedList',
+      mode: input.value('empty'),
+    }),
+  ],
+});
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