Admin home page #128 (#259)

* First iteration on the new PieChart component

* #128 Adds new admin home page

* Fixes code after merging conflicts

* Removes empty file

* Uses real data for admin home page, and improves style

* Reverts debugging code

* Defines missing variable

* Caches user stats data for admin home page

* Typo

* Styles improvements

* Invalidates cache on signup/signin

* Implements top 5 biggest games

* Improves styling

* Improves style

* Using generateManifest to get the proper size

* Reading data from cache

* Removes unnecessary import

* Improves caching mechanism for game sizes

* Removes lint errors

* Replaces piechart tooltip with colors in legend

* Fixes caching

* Fixes caching and slight improvement on pie chart colours

* Fixes a few bugs related to caching

* Fixes bug where app signin didn't refresh cache

* feat: style improvements

* fix: lint

---------

Co-authored-by: DecDuck <declanahofmeyr@gmail.com>

components/PieChart/utils.ts

@@ -0,0 +1,50 @@
+import Tuple from "~/utils/tuple";
+import type { Slice, SliceData } from "~/components/PieChart/types";
+import { sum, lastItem } from "~/utils/array";
+
+export const START = new Tuple(50, 10);
+export const CENTER = new Tuple(50, 50);
+export const RADIUS = 40;
+
+export const polarToCartesian = (
+  center: Tuple,
+  radius: number,
+  angleInDegrees: number,
+) => {
+  const angleInRadians = ((angleInDegrees - 90) * Math.PI) / 180;
+  const x = center.x + radius * Math.cos(angleInRadians);
+  const y = center.y + radius * Math.sin(angleInRadians);
+  return new Tuple(x, y);
+};
+
+export const percent2Degrees = (percentage: number) => (360 * percentage) / 100;
+
+export function generateSlices(data: SliceData[]): Slice[] {
+  return data.reduce((accumulator, currentValue, index, array) => {
+    const percentage =
+      (currentValue.value * 100) / sum(array.map((slice) => slice.value));
+    return [
+      ...accumulator,
+      {
+        start: accumulator.length
+          ? polarToCartesian(
+              CENTER,
+              RADIUS,
+              percent2Degrees(lastItem(accumulator).totalPercentage),
+            )
+          : START,
+        radius: RADIUS,
+        percentage: percentage,
+        totalPercentage:
+          sum(accumulator.map((element) => element.percentage)) + percentage,
+        center: CENTER,
+        color: PIE_COLOURS[index % PIE_COLOURS.length],
+        label: currentValue.label,
+        value: currentValue.value,
+      },
+    ];
+  }, [] as Slice[]);
+}
+
+export const getFlags = (percentage: number) =>
+  percentage > 50 ? new Tuple(1, 1) : new Tuple(0, 1);