// SPDX-FileCopyrightText: Copyright Orangebot, Inc. and Medplum contributors
// SPDX-License-Identifier: Apache-2.0
import type { Slot } from '@medplum/fhirtypes';
type DecoratedSlot = {
slot: Slot;
start: Date;
end: Date;
};
export function mergeOverlappingSlots(slots: Slot[]): Slot[] {
// Group slots by status
const slotsByStatus: Record<string, DecoratedSlot[]> = {};
slots.forEach((slot) => {
if (!slotsByStatus[slot.status]) {
slotsByStatus[slot.status] = [];
}
slotsByStatus[slot.status].push({
slot,
start: new Date(slot.start),
end: new Date(slot.end),
});
});
return Object.values(slotsByStatus).flatMap((statusSlots) => {
return statusSlots
.sort((a, b) => a.start.getTime() - b.start.getTime())
.reduce<DecoratedSlot[]>((acc, ds) => {
const last = acc.at(-1);
if (!last) {
return [ds];
}
if (ds.start <= last.end) {
if (ds.end > last.end) {
last.end = ds.end;
last.slot = { ...last.slot, end: ds.slot.end };
}
} else {
acc.push(ds);
}
return acc;
}, [])
.map((ds) => ds.slot);
});
}
