@burglekitt/gmt
Version:
Temporal-based date and time utilities with timezone support and polyfill integration
28 lines (27 loc) • 1.66 kB
TypeScript
/**
* Split a UTC interval at arbitrary `points`, producing consecutive sub-intervals.
*
* - `points` need not be sorted — they are sorted internally before splitting.
* - Points outside `[start, end]` are dropped; they cannot introduce a boundary that isn't
* inside the interval.
* - Points exactly on `start` or `end` are dropped too — they would only produce a
* zero-length sub-interval at the edge.
* - Duplicate points collapse to a single boundary.
* - Returns `[{ start, end }]` (the whole interval, unsplit) when no valid in-range point remains.
* - Returns `[]` when `points` is not an array, when any element is not a valid ISO UTC
* datetime string, or on invalid input (unparseable start/end, `start > end`, leap-second
* strings).
*
* @param start ISO UTC datetime string for the interval start
* @param end ISO UTC datetime string for the interval end
* @param points array of ISO UTC datetime strings to split at
* @returns array of `{ start, end }` records, or `[]` on invalid input
*
* @example intervalSplitAtUtc("2024-01-01T00:00:00Z", "2024-01-10T00:00:00Z", ["2024-01-05T00:00:00Z"]) // [{ start: "2024-01-01T00:00:00Z", end: "2024-01-05T00:00:00Z" }, { start: "2024-01-05T00:00:00Z", end: "2024-01-10T00:00:00Z" }]
* @example intervalSplitAtUtc("2024-01-01T00:00:00Z", "2024-01-10T00:00:00Z", []) // [{ start: "2024-01-01T00:00:00Z", end: "2024-01-10T00:00:00Z" }]
* @example intervalSplitAtUtc("invalid", "2024-01-10T00:00:00Z", ["2024-01-05T00:00:00Z"]) // []
*/
export declare function intervalSplitAtUtc(start: string, end: string, points: string[]): Array<{
start: string;
end: string;
}>;