thereby reducing it to an earlier rant

[Raoul Duke]

fundamentally a major problem is that none of our paradigms as reified actually successfully make the management of time be anything other than voodoo hell with insane rules & exceptions & special cases & footguns both documented and un. 

seriously what is a potential solution?

lordy lou. 

[Raoul Duke]

another fundamental thing that is part of why programming can suck (eg particularly in Angular): Indirection. Too much indirection makes things more inscrutable and ends up with me having to just grep for strings globally in the project praying for some kind of thrown bone. 

[Mike Austin]

Talking about indirection, I started going down the path of data-driven grouping — which worked but was a little confusing:

groupLookup[itemFilters.groupBy]?.[item[itemFilters.groupBy]] ?? "Items with no Epic";

I changed it to a switch to make it clearer and to be able to do arbitrary logic:

  const groupTitle = (item: TransfomedItem) => {
    switch (itemFilters.groupBy) {
      case "statusId":
        return statuses[item.statusId as keyof typeof ItemStatuses];
      case "parentId":
        return (item.parentId && epics ? epics[item.parentId] : "Items with no Epic");
    }

    return "All Items";
  };

The data driven approach also had to deal with different types (uuid, string, undefined) so had to be unioned. The groupTitle() function simply returns a string.