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44 lines
1.8 KiB
44 lines
1.8 KiB
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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