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// Stores and exposes one connection, or reference, to another data object.
// The reference must be to a specific type, which is specified on the class
// input.
//
// See also:
// - referenceList
// - withResolvedReference
//
import {input, templateCompositeFrom} from '#composite';
import {isThingClass, validateReference} from '#validators';
import {exposeDependency} from '#composite/control-flow';
import {inputWikiData, withResolvedReference} from '#composite/wiki-data';
export default templateCompositeFrom({
annotation: `singleReference`,
compose: false,
inputs: {
class: input.staticValue({validate: isThingClass}),
find: input({type: 'function'}),
data: inputWikiData({allowMixedTypes: false}),
},
update: ({
[input.staticValue('class')]: thingClass,
}) => ({
validate:
validateReference(
thingClass[Symbol.for('Thing.referenceType')]),
}),
steps: () => [
withResolvedReference({
ref: input.updateValue(),
data: input('data'),
find: input('find'),
}),
exposeDependency({dependency: '#resolvedReference'}),
],
});
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