davidporter-id-au / collisions.js Goto Github PK

If I were good at maths, I'm certain there would be an easier way to determine of two events are overlapping. In lieu of that, I decided to properly test (perhaps a bit enthusiastically) some code I was using to do ad-hoc checking for calendar collisions.

Given two objects with a start and end date:

a = {
	start: new Date(),
	end: new Date()
};

b = {
	start: new Date(),
	end: new Date()
};

Determine if there is any kind of collision by:

collision.intersect(a.start.valueOf(), a.end.valueOf(), b.start.valueOf(), b.end.valueOf());
//returns true if there is an overlap

.intersect(a.start, a.end, b.start, b.end);

Expects a and b as integers. Returns true if it finds an intersection of events.

.before(aStart, aEnd, bStart, bEnd)
.after(aStart, aEnd, bStart, bEnd)

Before and after determine whether a is wholly before or after b.

.within(aStart, aEnd, bStart, bEnd);

Returns true if b is within a

.during(aStart, aEnd, bStart, bEnd);

Returns true if a is within b