json-timeline/src/util/compareDates.js

Generate Interactive Timelines stored in JSON Advents with Tags.

/**
 * @module compareDates
 */

/**
 * @function
 * @name compareDates
 * @description Comparison Function for Dates
 * @param {Object} date1 Date 1
 * @param {Object} date2 Date 2
 * @returns -1 if date1 < date2, 0 if date1 == date2, 1 if date1 > date2
 */
function compareDates(date1, date2) {
    // Year
    if (date1.year < date2.year) {
        return -1;
    }
    if (date1.year > date2.year) {
        return 1;
    }
    // Month
    if (date1.month < date2.month) {
        return -1;
    }
    if (date1.month > date2.month) {
        return 1;
    }
    // Day
    if (date1.day < date2.day) {
        return -1;
    }
    if (date1.day > date2.day) {
        return 1;
    }
    // Equivalent
    return 0;
}

module.exports = compareDates;