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// Gets the listed properties from some object, providing each property's value
// as a dependency prefixed with the same name as the object (by default).
// If the object itself is null, all provided dependencies will be null;
// if it's missing only select properties, those will be provided as null.
//
// See also:
// - withPropertiesFromList
// - withPropertyFromObject
//
import {input, templateCompositeFrom} from '#composite';
import {isString, validateArrayItems} from '#validators';
export default templateCompositeFrom({
annotation: `withPropertiesFromObject`,
inputs: {
object: input({type: 'object', acceptsNull: true}),
properties: input({
type: 'array',
validate: validateArrayItems(isString),
}),
prefix: input.staticValue({type: 'string', defaultValue: null}),
},
outputs: ({
[input.staticDependency('object')]: object,
[input.staticValue('properties')]: properties,
[input.staticValue('prefix')]: prefix,
}) =>
(properties
? properties.map(property =>
(prefix
? `${prefix}.${property}`
: object
? `${object}.${property}`
: `#object.${property}`))
: ['#object']),
steps: () => [
{
dependencies: [input('object'), input('properties')],
compute: (continuation, {
[input('object')]: object,
[input('properties')]: properties,
}) => continuation({
['#entries']:
(object === null
? properties.map(property => [property, null])
: properties.map(property => [property, object[property]])),
}),
},
{
dependencies: [
input.staticDependency('object'),
input.staticValue('properties'),
input.staticValue('prefix'),
'#entries',
],
compute: (continuation, {
[input.staticDependency('object')]: object,
[input.staticValue('properties')]: properties,
[input.staticValue('prefix')]: prefix,
['#entries']: entries,
}) =>
(properties
? continuation(
Object.fromEntries(
entries.map(([property, value]) => [
(prefix
? `${prefix}.${property}`
: object
? `${object}.${property}`
: `#object.${property}`),
value ?? null,
])))
: continuation({
['#object']:
Object.fromEntries(entries),
})),
},
],
});
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