Vizzuality/gfw-climate

/**
 * The Modis timeline.
 *
 * @return ModisTimeline class (extends TimelineBtnClass)
 */
define(
  [
    'underscore',
    'moment',
    'abstract/timeline/TimelineBtnClass',
    'map/presenters/TimelineClassPresenter'
  ],
  function(_, moment, TimelineBtnClass, Presenter) {
    'use strict';

    var ModisTimeline = TimelineBtnClass.extend({
      initialize: function(layer, currentDate) {
        this.presenter = new Presenter(this);
        this.options = {
          dateRange: [layer.mindate, layer.maxdate],
          tickWidth: 60
        };
        ModisTimeline.__super__.initialize.apply(this, [layer, currentDate]);
      },

      /**
       * Get array of quarterly dates.
       *
       * @return {array} Array of quarterly.
       */
      _getData: function() {
        var data = [];

        while (1) {
          if (
            data.length > 0 &&
            _.last(data)
              .end.clone()
              .add(1, 'month')
              .endOf('month')
              .isAfter(this.options.dateRange[1])
          ) {
            break;
          }
          data.push(this._getDataItem(data));
        }

        return data;
      },

      _getDataItem: function(data) {
        var date = this.options.dateRange;
        var d = {};

        if (data.length < 1) {
          d.start = moment(date[0]).clone();
          d.end = moment(date[0])
            .clone()
            .add(2, 'month')
            .endOf('month');
        } else {
          d.start = _.last(data)
            .end.clone()
            .add(1, 'month')
            .startOf('month');
          d.end = _.last(data)
            .end.clone()
            .add(3, 'month')
            .endOf('month');
        }

        var quarter = (d.end.month() + 1) / 3;
        d.label = '{0} Q{1}'.format(d.end.year(), quarter);

        return d;
      }
    });

    return ModisTimeline;
  }
);