data: miscellaneous cleanup for withOtherReleases logic

Defines withOtherReleases in terms of new function
withAllReleases (also exposed as Track.allReleases),
in turn based on new property Track.secondaryReleases
(of the main release), which is a reverse ref list,
reverse.tracksWhichAreSecondaryReleasesOf().

1 files changed, 19 insertions, 0 deletions

diff --git a/src/data/things/track.js b/src/data/things/track.js
index 6ac417b5..69eb98a5 100644
--- a/src/data/things/track.js
+++ b/src/data/things/track.js
@@ -63,6 +63,7 @@ import {
   inheritContributionListFromMainRelease,
   inheritFromMainRelease,
   withAlbum,
+  withAllReleases,
   withAlwaysReferenceByDirectory,
   withContainingTrackSection,
   withDate,
@@ -419,6 +420,17 @@ export class Track extends Thing {
       }),
     ],
 
+    // Only has any value for main releases, because secondary releases
+    // are never secondary to *another* secondary release.
+    secondaryReleases: reverseReferenceList({
+      reverse: soupyReverse.input('tracksWhichAreSecondaryReleasesOf'),
+    }),
+
+    allReleases: [
+      withAllReleases(),
+      exposeDependency({dependency: '#allReleases'}),
+    ],
+
     otherReleases: [
       withOtherReleases(),
       exposeDependency({dependency: '#otherReleases'}),
@@ -679,6 +691,13 @@ export class Track extends Thing {
       referencing: track => [track],
       referenced: track => track.commentatorArtists,
     },
+
+    tracksWhichAreSecondaryReleasesOf: {
+      bindTo: 'trackData',
+
+      referencing: track => track.isSecondaryRelease ? [track] : [],
+      referenced: track => [track.mainReleaseTrack],
+    },
   };
 
   // Track YAML loading is handled in album.js.