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// Gets the total duration and contribution count from a list of contributions,
// respecting their `countInContributionTotals` and `countInDurationTotals`
// flags.
import {input, templateCompositeFrom} from '#composite';
import {
withFilteredList,
withPropertiesFromList,
withPropertyFromList,
withSum,
withUniqueItemsOnly,
} from '#composite/data';
export default templateCompositeFrom({
annotation: `withContributionListSums`,
inputs: {
list: input({type: 'array'}),
},
outputs: [
'#contributionListCount',
'#contributionListDuration',
],
steps: () => [
withPropertiesFromList({
list: input('list'),
properties: input.value([
'countInContributionTotals',
'countInDurationTotals',
]),
}),
withFilteredList({
list: input('list'),
filter: '#list.countInContributionTotals',
}).outputs({
'#filteredList': '#contributionsForCounting',
}),
withFilteredList({
list: input('list'),
filter: '#list.countInDurationTotals',
}).outputs({
'#filteredList': '#contributionsForDuration',
}),
{
dependencies: ['#contributionsForCounting'],
compute: (continuation, {
['#contributionsForCounting']: contributionsForCounting,
}) => continuation({
['#count']:
contributionsForCounting.length,
}),
},
withPropertyFromList({
list: '#contributionsForDuration',
property: input.value('thing'),
}),
// Don't double-up the durations for a track where the artist has multiple
// contributions.
withUniqueItemsOnly({
list: '#contributionsForDuration.thing',
}),
withPropertyFromList({
list: '#contributionsForDuration.thing',
property: input.value('duration'),
}).outputs({
'#contributionsForDuration.thing.duration': '#durationValues',
}),
withSum({
values: '#durationValues',
}).outputs({
'#sum': '#duration',
}),
{
dependencies: ['#count', '#duration'],
compute: (continuation, {
['#count']: count,
['#duration']: duration,
}) => continuation({
['#contributionListCount']: count,
['#contributionListDuration']: duration,
}),
},
],
});
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