27 lines
1 KiB
TypeScript
27 lines
1 KiB
TypeScript
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import { FractalResponseData, FractalResponseList } from '@/api/http';
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type Transformer<T> = (callback: FractalResponseData) => T;
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const isList = (data: FractalResponseList | FractalResponseData): data is FractalResponseList => data.object === 'list';
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function transform<T, M>(data: null | undefined, transformer: Transformer<T>, missing?: M): M;
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function transform<T, M>(data: FractalResponseData | null | undefined, transformer: Transformer<T>, missing?: M): T | M;
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function transform<T, M>(data: FractalResponseList | null | undefined, transformer: Transformer<T>, missing?: M): T[] | M;
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function transform<T> (data: FractalResponseData | FractalResponseList | null | undefined, transformer: Transformer<T>, missing = undefined) {
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if (data === undefined || data === null) {
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return missing;
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}
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if (isList(data)) {
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return data.data.map(transformer);
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}
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if (!data || !data.attributes || data.object === 'null_resource') {
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return missing;
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}
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return transformer(data);
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}
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export { transform };
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