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/PieChart.vue

@@ -0,0 +1,45 @@
+<template>
+  <h2 v-if="title" class="text-lg mb-4 w-full">{{ title }}</h2>
+  <div class="flex flex-col xl:flex-row gap-4">
+    <div class="relative flex grow max-w-[12rem]">
+      <svg class="aspect-square grow relative inline" viewBox="0 0 100 100">
+        <PieChartPieSlice
+          v-for="slice in slices"
+          :key="`${slice.percentage}-${slice.totalPercentage}`"
+          :slice="slice"
+        />
+      </svg>
+      <div class="absolute inset-0 bg-zinc-900 rounded-full m-12" />
+    </div>
+    <ul class="flex flex-col gap-y-1 justify-center text-left">
+      <li
+        v-for="slice in slices"
+        :key="slice.value"
+        class="text-sm inline-flex items-center gap-x-1"
+      >
+        <span
+          class="size-3 inline-block rounded-sm"
+          :class="CHART_COLOURS[slice.color].bg"
+        />
+        {{
+          $t("common.labelValueColon", {
+            label: slice.label,
+            value: slice.value,
+          })
+        }}
+      </li>
+    </ul>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { generateSlices } from "~/components/PieChart/utils";
+import type { SliceData } from "~/components/PieChart/types";
+
+const { data, title = undefined } = defineProps<{
+  data: SliceData[];
+  title?: string | undefined;
+}>();
+
+const slices = generateSlices(data);
+</script>

components/PieChart/PieSlice.vue

@@ -0,0 +1,35 @@
+<template>
+  <path
+    v-if="slice.percentage !== 0 && slice.percentage !== 100"
+    :class="[CHART_COLOURS[slice.color].fill]"
+    :d="`
+      M ${slice.start}
+      A ${slice.radius},${slice.radius} 0 ${getFlags(slice.percentage)} ${polarToCartesian(slice.center, slice.radius, percent2Degrees(slice.totalPercentage))}
+      L ${slice.center}
+      z
+    `"
+    stroke-width="2"
+  />
+  <circle
+    v-if="slice.percentage === 100"
+    :r="slice.radius"
+    :cx="slice.center.x"
+    :cy="slice.center.y"
+    :class="[CHART_COLOURS[slice.color].fill]"
+    stroke-width="2"
+  />
+</template>
+
+<script setup lang="ts">
+import type { Slice } from "~/components/PieChart/types";
+import {
+  getFlags,
+  percent2Degrees,
+  polarToCartesian,
+} from "~/components/PieChart/utils";
+import { CHART_COLOURS } from "~/utils/colors";
+
+const { slice } = defineProps<{
+  slice: Slice;
+}>();
+</script>

components/PieChart/types.d.ts

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+import type Tuple from "~/utils/tuple";
+import type { ChartColour } from "~/utils/colors";
+
+export type Slice = {
+  start: Tuple;
+  center: Tuple;
+  percentage: number;
+  totalPercentage: number;
+  radius: number;
+  color: ChartColour;
+  label: string;
+  value: number;
+};
+
+export type SliceData = {
+  value: number;
+  color?: ChartColour;
+  label: string;
+};

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);