feat: add QuadrantList and RingList to render items on homepage and quadrant page

src/lib/data.ts

@@ -36,8 +36,11 @@ export function getQuadrant(id: string): Quadrant | undefined {
   return getQuadrants().find((q) => q.id === id);
 }
 
-export function getItems(featured?: boolean): Item[] {
-  return data.items.filter((item) => !featured || item.featured) as Item[];
+export function getItems(quadrant?: string, featured?: boolean): Item[] {
+  return data.items.filter((item) => {
+    if (quadrant && item.quadrant !== quadrant) return false;
+    return !(featured && !item.featured);
+  }) as Item[];
 }
 
 export function getItem(id: string): Item | undefined {
@@ -46,3 +49,27 @@ export function getItem(id: string): Item | undefined {
 
 export const sortByFeaturedAndTitle = (a: Item, b: Item) =>
   Number(b.featured) - Number(a.featured) || a.title.localeCompare(b.title);
+
+export const groupItemsByRing = (items: Item[]) => {
+  return getRings().reduce(
+    (acc, ring) => {
+      const ringItems = items.filter((item) => item.ring === ring.id);
+      if (ringItems.length) acc[ring.id] = ringItems;
+      return acc;
+    },
+    {} as { [ringId: string]: Item[] },
+  );
+};
+
+export const groupItemsByQuadrant = (items: Item[]) => {
+  return getQuadrants().reduce(
+    (acc, quadrant) => {
+      const quadrantItems = items.filter(
+        (item) => item.quadrant === quadrant.id,
+      );
+      if (quadrantItems.length) acc[quadrant.id] = quadrantItems;
+      return acc;
+    },
+    {} as { [quadrantId: string]: Item[] },
+  );
+};