date-clashes

A simple API for detecting overlapping dates

Installation

npm install date-clashes --save

Usage

var myDates = [
   { s: /* Date */, e: /* Date */ , id: 1 },
   { s: /* Date */, e: /* Date */ , id: 2 },
   ...
];

var DateClash = require("date-clashes");

// Supply the constructor with instructions on how to parse your date objects
// The function must return an object that matches the 'Range' interface below
var clash = new DateClash.Clash(date => { return { start: date.s, end: date.e, id: date.id } });

// Detect the clashes
var clashes = clash.flatten(myDates);

// Make the clash 'window'/'extremities' fall on particular days of the week
// 0 = Sunday, 6 = Saturday
var clashes = clash.flatten(myDates, { startDay: 1 /* Monday */, endDay: 0 /* Sunday */ });

// Returns an object of type Clashes that looks like:
{
    start: Tue Sep 15 2015 00:00:00 GMT+0800 (W. Australia Standard Time),
    end: Thu Sep 24 2015 00:00:00 GMT+0800 (W. Australia Standard Time),
    
    '1': { date: Tue Sep 15 2015 00:00:00 GMT+0800 (W. Australia Standard Time),
     clashes: [ ... ] },
     ...
    '10': { date: Tue Sep 24 2015 00:00:00 GMT+0800 (W. Australia Standard Time),
     clashes: [ ... ] },
}


interface Clashes {
    start: Date; // The floored version of the earliest date in your array
    end: Date; // The ceiling version of the latest date in your array
    [dayNumber: number]: { date: Date, clashes: Range[] }
}

interface Range {
    start: Date;
    end: Date;
    [key: string]: any;
}

API

Constructor

constructor(rangeGetter?: RangeGetter);

RangeGetter

A function that takes an object and returns an object that date-clashes can understand (Range)
The object must contain a start and end property which must be Date objects.

Example:

function rangeGetter(myObject) {
    return {
        start: new Date(myObject.startDate),
        end: new Date(myObject.endDate),
        id: myObject.id,
        firstName: myObject.firstName,
        lastName: myObject.lastName
    };
}

var clash = new DateClash.Clash(rangeGetter);

Flatten

The function that does all of the work.
Takes an array of objects that your rangeGetter function can parse.

function flatten(dates: Array<any>, options?: Options) => Clashes;

Options

An optional object that has two optional properties:
startDay and endDay
These options will determine the day number of outer-extremities of the returned Clashes object.

{
    startDay: number,
    endDay: number
}

License

MIT