1 files changed, 80 insertions, 0 deletions
diff --git a/src/data/composite/things/track/withInferredAdditionalNames.js b/src/data/composite/things/track/withInferredAdditionalNames.js
new file mode 100644
index 00000000..659d6b8f
--- /dev/null
+++ b/src/data/composite/things/track/withInferredAdditionalNames.js
@@ -0,0 +1,80 @@
+// Infers additional name entries from other releases that were titled
+// differently, linking to the respective release via annotation.
+
+import {input, templateCompositeFrom} from '#composite';
+import {stitchArrays} from '#sugar';
+
+import {raiseOutputWithoutDependency} from '#composite/control-flow';
+import {withPropertiesFromList, withPropertyFromList} from '#composite/data';
+
+import withOtherReleases from './withOtherReleases.js';
+
+export default templateCompositeFrom({
+  annotation: `withInferredAdditionalNames`,
+
+  outputs: ['#inferredAdditionalNames'],
+
+  steps: () => [
+    withOtherReleases(),
+
+    raiseOutputWithoutDependency({
+      dependency: '#otherReleases',
+      mode: input.value('empty'),
+      output: input.value({'#inferredAdditionalNames': []}),
+    }),
+
+    {
+      dependencies: ['#otherReleases', 'name'],
+      compute: (continuation, {
+        ['#otherReleases']: otherReleases,
+        ['name']: name,
+      }) => continuation({
+        ['#differentlyNamedReleases']:
+          otherReleases.filter(release => release.name !== name),
+      }),
+    },
+
+    withPropertiesFromList({
+      list: '#differentlyNamedReleases',
+      properties: input.value(['name', 'directory', 'album']),
+    }),
+
+    withPropertyFromList({
+      list: '#differentlyNamedReleases.album',
+      property: input.value('name'),
+    }),
+
+    {
+      dependencies: [
+        '#differentlyNamedReleases.directory',
+        '#differentlyNamedReleases.album.name',
+      ],
+
+      compute: (continuation, {
+        ['#differentlyNamedReleases.directory']: trackDirectories,
+        ['#differentlyNamedReleases.album.name']: albumNames,
+      }) => continuation({
+        ['#annotations']:
+          stitchArrays({
+            trackDirectory: trackDirectories,
+            albumName: albumNames,
+          }).map(({trackDirectory, albumName}) =>
+              `[[track:${trackDirectory}|on ${albumName}]]`)
+      })
+    },
+
+    {
+      dependencies: ['#differentlyNamedReleases.name', '#annotations'],
+      compute: (continuation, {
+        ['#differentlyNamedReleases.name']: names,
+        ['#annotations']: annotations,
+      }) => continuation({
+        ['#inferredAdditionalNames']:
+          stitchArrays({
+            name: names,
+            annotation: annotations,
+          }),
+      }),
+    },
+  ],
+});