Source: functions/groupAdvents.js

  1. /**
  2.  * @module groupAdvents
  3.  */
  4. const compareDates = require('../util/compareDates');
  6. /**
  7.  * @function
  8.  * @name groupAdvents
  9.  * @description Group Advents by Start Date into Arrays
  10.  * @param {Object[]} advents Array of Advents
  11.  * @returns {Object[][]} Array of Arrays of Advents with the Same Start Date
  12.  */
  13. function groupAdvents(advents) {
  14.     if (advents.length === 0) {
  15.         return advents;
  16.     }
  17.     const groups = [[advents[0]]];
  18.     for (let i = 1, group = 0; i < advents.length; i++) {
  19.         if (compareDates(groups[group][0].start, advents[i].start) === 0) {
  20.             groups[group].push(advents[i]);
  21.         } else {
  22.             groups.push([advents[i]]);
  23.             group++;
  24.         }
  25.     }
  26.     return groups;
  27. }
  29. module.exports = groupAdvents;