Marc Mintel
5397309103
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50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
import { normalizeDates } from "./_lib/normalizeDates.js";
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/**
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* The {@link interval} function options.
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*/
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/**
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* The {@link interval} function result type. It resolves the proper data type.
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* It uses the first argument date object type, starting from the start argument,
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* then the end interval date. If a context function is passed, it uses the context
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* function return type.
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*/
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/**
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* @name interval
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* @category Interval Helpers
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* @summary Creates an interval object and validates its values.
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*
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* @description
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* Creates a normalized interval object and validates its values. If the interval is invalid, an exception is thrown.
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*
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* @typeParam StartDate - Start date type.
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* @typeParam EndDate - End date type.
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* @typeParam Options - Options type.
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*
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* @param start - The start of the interval.
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* @param end - The end of the interval.
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* @param options - The options object.
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*
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* @throws `Start date is invalid` when `start` is invalid.
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* @throws `End date is invalid` when `end` is invalid.
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* @throws `End date must be after start date` when end is before `start` and `options.assertPositive` is true.
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*
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* @returns The normalized and validated interval object.
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*/
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export function interval(start, end, options) {
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const [_start, _end] = normalizeDates(options?.in, start, end);
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if (isNaN(+_start)) throw new TypeError("Start date is invalid");
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if (isNaN(+_end)) throw new TypeError("End date is invalid");
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if (options?.assertPositive && +_start > +_end)
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throw new TypeError("End date must be after start date");
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return { start: _start, end: _end };
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}
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// Fallback for modularized imports:
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export default interval;
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