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45 lines
1.8 KiB
45 lines
1.8 KiB
4 years ago
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var parse = require('../parse/index.js')
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/**
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* @category Range Helpers
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* @summary Is the given date range overlapping with another date range?
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*
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* @description
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* Is the given date range overlapping with another date range?
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*
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* @param {Date|String|Number} initialRangeStartDate - the start of the initial range
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* @param {Date|String|Number} initialRangeEndDate - the end of the initial range
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* @param {Date|String|Number} comparedRangeStartDate - the start of the range to compare it with
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* @param {Date|String|Number} comparedRangeEndDate - the end of the range to compare it with
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* @returns {Boolean} whether the date ranges are overlapping
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* @throws {Error} startDate of a date range cannot be after its endDate
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*
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* @example
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* // For overlapping date ranges:
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* areRangesOverlapping(
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* new Date(2014, 0, 10), new Date(2014, 0, 20), new Date(2014, 0, 17), new Date(2014, 0, 21)
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* )
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* //=> true
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*
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* @example
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* // For non-overlapping date ranges:
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* areRangesOverlapping(
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* new Date(2014, 0, 10), new Date(2014, 0, 20), new Date(2014, 0, 21), new Date(2014, 0, 22)
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* )
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* //=> false
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*/
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function areRangesOverlapping (dirtyInitialRangeStartDate, dirtyInitialRangeEndDate, dirtyComparedRangeStartDate, dirtyComparedRangeEndDate) {
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var initialStartTime = parse(dirtyInitialRangeStartDate).getTime()
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var initialEndTime = parse(dirtyInitialRangeEndDate).getTime()
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var comparedStartTime = parse(dirtyComparedRangeStartDate).getTime()
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var comparedEndTime = parse(dirtyComparedRangeEndDate).getTime()
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if (initialStartTime > initialEndTime || comparedStartTime > comparedEndTime) {
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throw new Error('The start of the range cannot be after the end of the range')
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}
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return initialStartTime < comparedEndTime && comparedStartTime < initialEndTime
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}
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module.exports = areRangesOverlapping
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