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Merge branch 'preview' into listing-tweaks - hsmusic-wiki - HSMusic - static wiki software cataloguing collaborative creation
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author(quasar) nebula <qznebula@protonmail.com>2023-10-29 09:26:59 -0300
committer(quasar) nebula <qznebula@protonmail.com>2023-10-29 09:26:59 -0300
commitbfa1953e79a562ee675940b7acc52b5b29d22d8f (patch)
tree5c1cd2f4050c801a60f4b65b367a714ed0979759 /src/data/composite/wiki-data/exitWithoutContribs.js
parentc4ef4ced62d659d217873c6c48dd8038dbf765af (diff)
parent940b2cbf8b68eb0b446cca0feeb507840c486394 (diff)
Merge branch 'preview' into listing-tweaks
Diffstat (limited to 'src/data/composite/wiki-data/exitWithoutContribs.js')
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diff --git a/src/data/composite/wiki-data/exitWithoutContribs.js b/src/data/composite/wiki-data/exitWithoutContribs.js
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+// Shorthand for exiting if the contribution list (usually a property's update
+// value) resolves to empty - ensuring that the later computed results are only
+// returned if these contributions are present.
+
+import {input, templateCompositeFrom} from '#composite';
+import {isContributionList} from '#validators';
+
+import {withResultOfAvailabilityCheck} from '#composite/control-flow';
+
+import withResolvedContribs from './withResolvedContribs.js';
+
+export default templateCompositeFrom({
+  annotation: `exitWithoutContribs`,
+
+  inputs: {
+    contribs: input({
+      validate: isContributionList,
+      acceptsNull: true,
+    }),
+
+    value: input({defaultValue: null}),
+  },
+
+  steps: () => [
+    withResolvedContribs({
+      from: input('contribs'),
+    }),
+
+    // TODO: Fairly certain exitWithoutDependency would be sufficient here.
+
+    withResultOfAvailabilityCheck({
+      from: '#resolvedContribs',
+      mode: input.value('empty'),
+    }),
+
+    {
+      dependencies: ['#availability', input('value')],
+      compute: (continuation, {
+        ['#availability']: availability,
+        [input('value')]: value,
+      }) =>
+        (availability
+          ? continuation()
+          : continuation.exit(value)),
+    },
+  ],
+});