function assignTracks()

in src/core/main.ts [2810:2903]

• 84 lines of code
• 29 McCabe index (conditional complexity)

  function assignTracks(data, tracks, layout) {
    // reset tracks first
    if (data && data.length) {
      data.forEach(function (item) {
        item.track = 0;
      });

      var i, track, min_width, effective_width;

      if (globals.date_granularity !== "epochs") {
        data.min_start_date = d3.min(data, function (d) {
          return d.start_date;
        });
        data.max_start_date = d3.max(data, function (d) {
          return d.start_date;
        });
        data.max_end_date = d3.max(data, function (d) {
          return d.end_date;
        });

        if (globals.width > (instance._render_width - globals.margin.right - globals.margin.left - getScrollbarWidth())) {
          effective_width = instance._render_width - globals.margin.right - globals.margin.left - getScrollbarWidth();
        } else {
          effective_width = globals.width;
        }


        var w = (effective_width - globals.padding.left - globals.padding.right - globals.unit_width),
          d = (data.max_end_date.getTime() - data.min_start_date.getTime());

        if (globals.segment_granularity === "days") {
          min_width = 0;
        } else if (layout === "Segmented") {
          min_width = 0;
        } else {
          min_width = (d / w * globals.unit_width);
        }
      }

      // older items end deeper
      data.forEach(function (item) {
        if (globals.date_granularity === "epochs") {
          item.track = 0;
        } else {
          for (i = 0, track = 0; i < tracks.length; i++, track++) {
            if (globals.segment_granularity === "days") {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "weeks") {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "months") {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "years") {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "decades" && globals.date_granularity === "days" && data.max_duration < 31) {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "centuries" && globals.date_granularity === "days" && data.max_duration < 31) {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (globals.segment_granularity === "millenia") {
              if (item.start_date.getTime() > tracks[i].getTime()) {
                break;
              }
            } else if (item.start_date.getTime() > tracks[i].getTime()) {
              break;
            }
          }
          item.track = track;

          if (min_width > item.end_date.getTime() - item.start_date.getTime()) {
            tracks[track] = moment(item.end_date.getTime() + min_width).toDate();
          } else {
            tracks[track] = item.end_date;
          }
        }
      });

      globals.num_tracks = d3.max(data, function (d) { // eslint-disable-line no-shadow
        return d.track;
      });
    } else {
      globals.num_tracks = 0;
    }
  }