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// Like withReverseReferenceList, but for finding all things which reference
// the current thing by a property that contains a single reference, rather
// than within a reference list.
import withReverseList_template from './helpers/withReverseList-template.js';
import {input} from '#composite';
import {withAvailabilityFilter} from '#composite/control-flow';
import {withMappedList, withPropertyFromList} from '#composite/data';
export default withReverseList_template({
annotation: `withReverseSingleReferenceList`,
propertyInputName: 'ref',
outputName: '#reverseSingleReferenceList',
customCompositionSteps: () => [
{
dependencies: [input('data')],
compute: (continuation, {
[input('data')]: data,
}) => continuation({
['#referencingThings']:
data,
}),
},
withPropertyFromList({
list: '#referencingThings',
property: input('ref'),
}).outputs({
'#values': '#individualReferencedThings',
}),
withAvailabilityFilter({
from: '#individualReferencedThings',
}),
// This map wraps each referenced thing in a single-item array.
// Each referencing thing references exactly one thing, if any.
withMappedList({
list: '#individualReferencedThings',
filter: '#availabilityFilter',
map: input.value(thing => [thing]),
}).outputs({
'#mappedList': '#referencedThings',
}),
],
});
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