UnPrettyDate

UnPrettyDate.js

/*
 * JavaScript Un-PrettyDate
 * Copyright (c) 2014 Lucas Lemanowicz
 * Licensed under the MIT license.
 */

// Takes a PrettyDate string and turns it back into a Date object.
function unPrettyDate(time) {
    timeCut = time.split(" ");

    // Assumes input is in the format of "X units ago"
    if (timeCut.length == 3 && timeCut[2] == "ago") {
        switch(timeCut[1].toLowerCase()) {
            default:
            case "second":
            case "seconds":
                multiplier = 1;
                break;
            case "minute":
            case "minutes":
                multiplier = 60;
                break;
            case "hour":
            case "hours":
                multiplier = 60 * 60;
                break;
            case "day":
            case "days":
                multiplier = 60 * 60 * 24;
                break;
            case "week":
            case "weeks":
                multiplier = 60 * 60 * 24 * 7;
                break;
            case "month":
            case "months":
                multiplier = 60 * 60 * 24 * 7 * 30.5;
                break;
        }

        // Determine roughly how many seconds ago this was
        diffSeconds = parseInt(timeCut[0]) * multiplier;

        return new Date(new Date() - diffSeconds * 1000);
    }

    throw "Unsupported Pretty Date format";
}