mirror of
https://github.com/multipleof4/lynchmark.git
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78 lines
2.5 KiB
JavaScript
78 lines
2.5 KiB
JavaScript
const findAvailableSlots = async (cal1, cal2, constraints) => {
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const { default: dayjs } = await import('https://cdn.jsdelivr.net/npm/dayjs@1.11.10/+esm');
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const [{ default: utc }, { default: customParseFormat }, { default: isBetween }] = await Promise.all([
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import('https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/utc.js'),
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import('https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/customParseFormat.js'),
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import('https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/isBetween.js')
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]);
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dayjs.extend(utc);
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dayjs.extend(customParseFormat);
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dayjs.extend(isBetween);
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const { durationMinutes, searchRange, workHours } = constraints;
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const duration = durationMinutes;
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const mergedBusy = [...cal1, ...cal2]
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.map(({ start, end }) => ({ start: dayjs(start), end: dayjs(end) }))
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.sort((a, b) => a.start - b.start)
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.reduce((acc, curr) => {
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if (!acc.length) return [curr];
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const last = acc[acc.length - 1];
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if (curr.start <= last.end) {
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last.end = dayjs.max(last.end, curr.end);
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return acc;
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}
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return [...acc, curr];
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}, []);
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const searchStart = dayjs(searchRange.start);
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const searchEnd = dayjs(searchRange.end);
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const [workStart, workEnd] = [workHours.start, workHours.end];
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const slots = [];
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let current = searchStart;
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while (current < searchEnd) {
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const dayStart = dayjs(`${current.format('YYYY-MM-DD')}T${workStart}`);
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const dayEnd = dayjs(`${current.format('YYYY-MM-DD')}T${workEnd}`);
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const workStart_ = dayjs.max(current, dayStart);
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const workEnd_ = dayjs.min(searchEnd, dayEnd);
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if (workStart_ < workEnd_) {
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const dayBusy = mergedBusy.filter(b =>
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b.start < workEnd_ && b.end > workStart_
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);
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let pointer = workStart_;
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for (const busy of dayBusy) {
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const gapEnd = dayjs.min(busy.start, workEnd_);
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while (pointer.add(duration, 'minute') <= gapEnd) {
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slots.push({
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start: pointer.toISOString(),
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end: pointer.add(duration, 'minute').toISOString()
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});
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pointer = pointer.add(duration, 'minute');
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}
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pointer = dayjs.max(pointer, busy.end);
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}
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while (pointer.add(duration, 'minute') <= workEnd_) {
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slots.push({
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start: pointer.toISOString(),
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end: pointer.add(duration, 'minute').toISOString()
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});
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pointer = pointer.add(duration, 'minute');
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}
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}
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current = current.add(1, 'day').startOf('day');
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}
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return slots;
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};
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export default findAvailableSlots; |