1 files changed, 0 insertions, 91 deletions
diff --git a/src/data/composite/wiki-data/withReverseContributionList.js b/src/data/composite/wiki-data/withReverseContributionList.js
deleted file mode 100644
index 91e125e4..00000000
--- a/src/data/composite/wiki-data/withReverseContributionList.js
+++ /dev/null
@@ -1,91 +0,0 @@
-// Analogous implementation for withReverseReferenceList, for contributions.
-// This is all duplicate code and both should be ported to the same underlying
-// data form later on.
-//
-// This implementation uses a global cache (via WeakMap) to attempt to speed
-// up subsequent similar accesses.
-//
-// This has absolutely not been rigorously tested with altering properties of
-// data objects in a wiki data array which is reused. If a new wiki data array
-// is used, a fresh cache will always be created.
-
-import {input, templateCompositeFrom} from '#composite';
-
-import {exitWithoutDependency, raiseOutputWithoutDependency}
-  from '#composite/control-flow';
-
-import inputWikiData from './inputWikiData.js';
-
-// Mapping of reference list property to WeakMap.
-// Each WeakMap maps a wiki data array to another weak map,
-// which in turn maps each referenced thing to an array of
-// things referencing it.
-const caches = new Map();
-
-export default templateCompositeFrom({
-  annotation: `withReverseContributionList`,
-
-  inputs: {
-    data: inputWikiData({allowMixedTypes: false}),
-    list: input({type: 'string'}),
-  },
-
-  outputs: ['#reverseContributionList'],
-
-  steps: () => [
-    // Early exit with an empty array if the data list isn't available.
-    exitWithoutDependency({
-      dependency: input('data'),
-      value: input.value([]),
-    }),
-
-    // Raise an empty array (don't early exit) if the data list is empty.
-    raiseOutputWithoutDependency({
-      dependency: input('data'),
-      mode: input.value('empty'),
-      output: input.value({'#reverseContributionList': []}),
-    }),
-
-    {
-      dependencies: [input.myself(), input('data'), input('list')],
-
-      compute: (continuation, {
-        [input.myself()]: myself,
-        [input('data')]: data,
-        [input('list')]: list,
-      }) => {
-        if (!caches.has(list)) {
-          caches.set(list, new WeakMap());
-        }
-
-        const cache = caches.get(list);
-
-        if (!cache.has(data)) {
-          const cacheRecord = new WeakMap();
-
-          for (const referencingThing of data) {
-            const referenceList = referencingThing[list];
-
-            // Destructuring {artist} is the only unique part of the
-            // withReverseContributionList implementation, compared to
-            // withReverseReferneceList.
-            for (const {artist: referencedThing} of referenceList) {
-              if (cacheRecord.has(referencedThing)) {
-                cacheRecord.get(referencedThing).push(referencingThing);
-              } else {
-                cacheRecord.set(referencedThing, [referencingThing]);
-              }
-            }
-          }
-
-          cache.set(data, cacheRecord);
-        }
-
-        return continuation({
-          ['#reverseContributionList']:
-            cache.get(data).get(myself) ?? [],
-        });
-      },
-    },
-  ],
-});