data: reverseAnnotatedReferenceList

2 files changed, 82 insertions, 0 deletions

diff --git a/src/data/composite/wiki-data/index.js b/src/data/composite/wiki-data/index.js
index 581dafc8..51d07384 100644
--- a/src/data/composite/wiki-data/index.js
+++ b/src/data/composite/wiki-data/index.js
@@ -19,6 +19,7 @@ export {default as withResolvedContribs} from './withResolvedContribs.js';
 export {default as withResolvedReference} from './withResolvedReference.js';
 export {default as withResolvedReferenceList} from './withResolvedReferenceList.js';
 export {default as withResolvedSeriesList} from './withResolvedSeriesList.js';
+export {default as withReverseAnnotatedReferenceList} from './withReverseAnnotatedReferenceList.js';
 export {default as withReverseContributionList} from './withReverseContributionList.js';
 export {default as withReverseReferenceList} from './withReverseReferenceList.js';
 export {default as withReverseSingleReferenceList} from './withReverseSingleReferenceList.js';
diff --git a/src/data/composite/wiki-data/withReverseAnnotatedReferenceList.js b/src/data/composite/wiki-data/withReverseAnnotatedReferenceList.js
new file mode 100644
index 00000000..168b68c0
--- /dev/null
+++ b/src/data/composite/wiki-data/withReverseAnnotatedReferenceList.js
@@ -0,0 +1,81 @@
+// Analogous implementation for withReverseReferenceList, for annotated
+// references.
+//
+// Unlike withReverseContributionList, this composition is responsible for
+// "flipping" the directionality of references: in a forward reference list,
+// `thing` points to the thing being referenced, while here, it points to the
+// referencing thing.
+
+import withReverseList_template from './helpers/withReverseList-template.js';
+
+import {input} from '#composite';
+import {stitchArrays} from '#sugar';
+
+import {
+  withFlattenedList,
+  withMappedList,
+  withPropertyFromList,
+  withStretchedList,
+} from '#composite/data';
+
+export default withReverseList_template({
+  annotation: `withReverseAnnotatedReferenceList`,
+
+  propertyInputName: 'list',
+  outputName: '#reverseAnnotatedReferenceList',
+
+  customCompositionSteps: () => [
+    withPropertyFromList({
+      list: input('data'),
+      property: input('list'),
+    }).outputs({
+      '#values': '#referenceLists',
+    }),
+
+    withPropertyFromList({
+      list: '#referenceLists',
+      property: input.value('length'),
+    }),
+
+    withFlattenedList({
+      list: '#referenceLists',
+    }).outputs({
+      '#flattenedList': '#references',
+    }),
+
+    withStretchedList({
+      list: input('data'),
+      lengths: '#referenceLists.length',
+    }).outputs({
+      '#stretchedList': '#things',
+    }),
+
+    withPropertyFromList({
+      list: '#references',
+      property: input.value('annotation'),
+    }).outputs({
+      '#references.annotation': '#annotations',
+    }),
+
+    {
+      dependencies: ['#things', '#annotations'],
+      compute: (continuation, {
+        ['#things']: things,
+        ['#annotations']: annotations,
+      }) => continuation({
+        ['#referencingThings']:
+          stitchArrays({
+            thing: things,
+            annotation: annotations,
+          }),
+      }),
+    },
+
+    withMappedList({
+      list: '#references',
+      map: input.value(reference => [reference.thing]),
+    }).outputs({
+      '#mappedList': '#referencedThings',
+    }),
+  ],
+});