From 12635511af58636ee57fc39699f841f412e2b17f Mon Sep 17 00:00:00 2001
From: Pascal Syma <p.syma@appfarms.com>
Date: Sun, 7 Sep 2025 03:09:37 +0200
Subject: [PATCH] Add stats

---
 src/pages/HomeView.vue  |   2 +
 src/pages/StatsView.vue |  66 +++++++++++++++++-
 src/stores/tram.ts      |   6 +-
 src/utils/array.ts      | 150 ++++++++++++++++++++++++++++++++++++++++
 src/utils/typeGroup.ts  |   9 +++
 5 files changed, 228 insertions(+), 5 deletions(-)
 create mode 100644 src/utils/array.ts
 create mode 100644 src/utils/typeGroup.ts

diff --git a/src/pages/HomeView.vue b/src/pages/HomeView.vue
index 43c20ae..123e7e5 100644
--- a/src/pages/HomeView.vue
+++ b/src/pages/HomeView.vue
@@ -11,6 +11,7 @@ import {
   VaCardActions,
   VaCardContent,
   VaCardTitle,
+  VaDivider,
   VaForm,
   VaIcon,
   VaInput
@@ -88,6 +89,7 @@ function add() {
             >Gesehen</VaButton
           >
         </VaForm>
+        <VaDivider />
         <CarDetail :car="enteredType" />
       </VaCardContent>
     </VaCard>
diff --git a/src/pages/StatsView.vue b/src/pages/StatsView.vue
index 06c9c88..662dc6d 100644
--- a/src/pages/StatsView.vue
+++ b/src/pages/StatsView.vue
@@ -1,7 +1,69 @@
-<script setup lang="ts"></script>
+<script setup lang="ts">
+import StatsBlock from '@/components/StatsBlock.vue';
+import { type, useTramStore } from '@/stores/tram.ts';
+import { groupBy } from '@/utils/array.ts';
+import { idsOf } from '@/utils/typeGroup.ts';
+import { VaCard, VaCardContent, VaCardTitle } from 'vuestic-ui';
+
+const tramStore = useTramStore();
+</script>
 
 <template>
-  <h1>Stats</h1>
+  <article class="p-4">
+    <h1 class="mb-4 text-3xl">Statistiken</h1>
+
+    <div class="grid grid-cols-1 gap-4 md:grid-cols-2">
+      <VaCard stripe-color="success" stripe>
+        <VaCardTitle>Nach Typ</VaCardTitle>
+        <VaCardContent>
+          <div class="flex flex-col justify-around gap-4">
+            <div v-for="(group, i) in groupBy(type, (t) => t[3])" :key="i">
+              <p>{{ idsOf(group.elements) }}:</p>
+              <StatsBlock
+                :total="group.elements.reduce((acc, t) => acc + (t[1] - t[0]) + 1, 0)"
+                :found="
+                  tramStore.trams.bsag.filter((id) =>
+                    group.elements.some((t) => id >= t[0] && id <= t[1])
+                  ).length
+                "
+                :icon="group.elements[0][2] ? 'tram' : 'directions_bus'"
+                :color="group.elements[0][2] ? 'danger' : 'warning'"
+                :name="group.key"
+              />
+            </div>
+          </div>
+        </VaCardContent>
+      </VaCard>
+      <VaCard class="mb-auto" stripe-color="success" stripe>
+        <VaCardTitle>Quick stats</VaCardTitle>
+        <VaCardContent>
+          <div class="flex flex-col justify-around sm:flex-row">
+            <StatsBlock
+              :total="tramStore.shortStats.totalCount"
+              :found="tramStore.shortStats.found"
+              name="Fahrzeuge"
+              color="success"
+              icon="train"
+            />
+            <StatsBlock
+              :total="tramStore.shortStats.tramCount"
+              :found="tramStore.shortStats.trams"
+              name="Trams"
+              color="danger"
+              icon="tram"
+            />
+            <StatsBlock
+              :total="tramStore.shortStats.busCount"
+              :found="tramStore.shortStats.busses"
+              name="Busse"
+              color="warning"
+              icon="directions_bus"
+            />
+          </div>
+        </VaCardContent>
+      </VaCard>
+    </div>
+  </article>
 </template>
 
 <style scoped></style>
diff --git a/src/stores/tram.ts b/src/stores/tram.ts
index 487f582..6e78100 100644
--- a/src/stores/tram.ts
+++ b/src/stores/tram.ts
@@ -1,12 +1,12 @@
 import { defineStore } from 'pinia';
 import { computed, reactive } from 'vue';
 
-export const type: [number, number, boolean, string][] = [
+export type CarType = [number, number, boolean, string];
+export const type: CarType[] = [
   [3101, 3143, true, 'GT8N-1 - Bombardier Flexity Classic'],
   [3201, 3249, true, 'GT8N-2 - Siemens Avenio'],
   [3401, 3435, true, 'GT8N-2 - Siemens Avenio'],
-  [4001, 4005, false, 'Solobus Mercedes eCitaro O 530 C2'],
-  [4006, 4020, false, 'Solobus Mercedes eCitaro O 530 C2'],
+  [4001, 4020, false, 'Solobus Mercedes eCitaro O 530 C2'],
   [4061, 4075, false, 'Solobus Mercedes Citaro O 530 C2'],
   [4076, 4090, false, 'Solobus Mercedes Citaro O 530 C2 hybrid'],
   [4150, 4151, false, 'Solobus MAN Lion´s City A21 NL 280'],
diff --git a/src/utils/array.ts b/src/utils/array.ts
new file mode 100644
index 0000000..cd63da8
--- /dev/null
+++ b/src/utils/array.ts
@@ -0,0 +1,150 @@
+/**
+ * Returns the sum of all the elements of a numeric array.
+ * @param arr Numeric array.
+ */
+export function sumArray(arr: ReadonlyArray<number>): number {
+  return sumBy(arr, (a) => a);
+}
+
+/**
+ * Returns the sum of all the elements of any array,
+ * given a lamda function to receive the numeric representation of each element.
+ * @param arr Any array.
+ * @param by Map element to number or string, which will be interpreted as a number.
+ */
+export function sumBy<E>(arr: ReadonlyArray<E>, by: (element: E) => number | string): number {
+  return arr.reduce((sum, element) => sum + Number(by(element)), 0);
+}
+
+/**
+ * Returns the product of a numeric array.
+ * @param arr Numeric array.
+ */
+export function multArray(arr: ReadonlyArray<number>): number {
+  return multBy(arr, (a) => a);
+}
+
+/**
+ * Returns the product of any array,
+ * given a lamda function to receive the numeric representation of each element.
+ * @param arr Any array.
+ * @param by Map element to number or string, which will be interpreted as a number.
+ */
+export function multBy<E>(arr: ReadonlyArray<E>, by: (element: E) => number | string): number {
+  if (arr.length <= 0) {
+    return 0;
+  }
+  return arr.reduce((sum, element) => sum * Number(by(element)), 1);
+}
+
+/**
+ * Group an array by a given key.
+ * @param arr Any array.
+ * @param by Map element to key.
+ * @param equals Check if two keys are identical. Defaults to strict equality.
+ */
+export function groupBy<E, K>(
+  arr: ReadonlyArray<E>,
+  by: (element: E) => K,
+  equals: (a: K, b: K) => boolean = (a, b) => a === b
+): { key: K; elements: Array<E> }[] {
+  return arr.reduce(
+    (groups, element) => {
+      const key = by(element);
+      const index = groups.findIndex((e) => equals(e.key, key));
+
+      if (index < 0) {
+        // New key found, add to group array.
+        groups.push({ key, elements: [element] });
+        return groups;
+      }
+
+      const existing = groups[index];
+      existing.elements.push(element);
+
+      return groups;
+    },
+    [] as { key: K; elements: Array<E> }[]
+  );
+}
+
+/**
+ * Return the middle Element of an array, rounding up.
+ * Returns undefined for empty arrays without throwing!
+ *
+ * @example
+ * ```typescript
+ * getMiddleElement([1, 2, 3, 4]) === 3
+ * getMiddleElement([1, 2, 3]) === 2
+ * getMiddleElement([1]) === 1
+ * getMiddleElement([]) === undefined
+ * ```
+ * @param arr
+ */
+export function getMiddleElement<E>(arr: ReadonlyArray<E>) {
+  return arr[Math.floor(arr.length / 2)];
+}
+
+/**
+ * Returns an array with every combination of every element in an array.
+ * The combination array will have a length of `n * (n-1)` for an array of length `n`.
+ * @example
+ * ```typescript
+ * const arr = [0, 1, 2]
+ *
+ * combinations(arr) === [
+ *  {a: 0, b: 1},
+ *  {a: 0, b: 2},
+ *  {a: 1, b: 0},
+ *  {a: 1, b: 2},
+ *  {a: 2, b: 0},
+ *  {a: 2, b: 1},
+ * ]
+ * ```
+ * @param arr
+ */
+export function combinations<E>(arr: ReadonlyArray<E>): { a: E; b: E }[] {
+  return arr
+    .flatMap((a, _, arr) => arr.flatMap((b) => (a !== b ? [{ a, b }] : null)))
+    .filter((c) => !!c);
+}
+
+/**
+ * Returns an array with every unique combination of every element in an array.
+ * The combination array will have a length of `n! / ((n-2)! * 2)` for an array of length `n`.
+ * @example
+ * ```typescript
+ * const arr = [0, 1, 2]
+ *
+ * combinations(arr) === [
+ *  {a: 0, b: 1},
+ *  {a: 0, b: 2},
+ *  {a: 1, b: 2}
+ * ]
+ * ```
+ * @param arr
+ */
+export function uniqueCombinations<E>(arr: ReadonlyArray<E>): { a: E; b: E }[] {
+  return arr.flatMap((a, aI) => arr.flatMap((b, bI) => (a !== b && aI > bI ? [{ a, b }] : [])));
+}
+
+/**
+ * Returns a filter lambda to be used in array.filter() to only allow the
+ * first occurrence of duplicate values.
+ * @param isEqual Custom equality check, defaults to `a === b`
+ */
+export function unique<E>(isEqual: (a: E, b: E) => boolean = (a, b) => a === b) {
+  return (self: E, index: number, arr: ReadonlyArray<E>) =>
+    arr.findIndex((v) => isEqual(v, self)) === index;
+}
+
+/**
+ * Replace a char in a two-dimensional array of strings.
+ * @param arr two-dimensional string array
+ * @param x column
+ * @param y row
+ * @param char Char
+ */
+export function replaceChar(arr: string[], x: number, y: number, char: string) {
+  arr[y] = arr[y].substring(0, x) + char + arr[y].substring(x + char.length);
+}
diff --git a/src/utils/typeGroup.ts b/src/utils/typeGroup.ts
new file mode 100644
index 0000000..94024cd
--- /dev/null
+++ b/src/utils/typeGroup.ts
@@ -0,0 +1,9 @@
+import type { CarType } from '@/stores/tram.ts';
+
+export function idsOf(elements: CarType[]): string {
+  if (elements.length <= 0) {
+    return '';
+  }
+
+  return elements.map((t) => (t[0] === t[1] ? t[0] : `${t[0]}-${t[1]}`)).join(', ');
+}