data: TrackSection.{start,continue}CountingFrom, Track.trackNumber

1 files changed, 25 insertions, 0 deletions

diff --git a/src/data/composite/things/track-section/withContinueCountingFrom.js b/src/data/composite/things/track-section/withContinueCountingFrom.js
new file mode 100644
index 00000000..e034b7a5
--- /dev/null
+++ b/src/data/composite/things/track-section/withContinueCountingFrom.js
@@ -0,0 +1,25 @@
+import {input, templateCompositeFrom} from '#composite';
+
+import withStartCountingFrom from './withStartCountingFrom.js';
+
+export default templateCompositeFrom({
+  annotation: `withContinueCountingFrom`,
+
+  outputs: ['#continueCountingFrom'],
+
+  steps: () => [
+    withStartCountingFrom(),
+
+    {
+      dependencies: ['#startCountingFrom', 'tracks'],
+      compute: (continuation, {
+        ['#startCountingFrom']: startCountingFrom,
+        ['tracks']: tracks,
+      }) => continuation({
+        ['#continueCountingFrom']:
+          startCountingFrom +
+          tracks.length,
+      }),
+    },
+  ],
+});