feat: Added statistics

lib/main.dart

@@ -1,5 +1,6 @@
 import "package:bbs4/types/config.dart";
 import "package:bbs4/types/global_data.dart";
+import "package:bbs4/widgets/statistics.dart";
 import "package:flutter/foundation.dart";
 import "package:flutter/material.dart";
 import "package:flutter_hooks/flutter_hooks.dart";
@@ -60,7 +61,7 @@ class MainApp extends HookWidget {
 
   @override
   Widget build(BuildContext context) {
-    final tabController = useTabController(initialLength: 2);
+    final tabController = useTabController(initialLength: 3);
 
     return Scaffold(
       appBar: AppBar(
@@ -71,6 +72,7 @@ class MainApp extends HookWidget {
         bottom: TabBar(controller: tabController, tabs: const [
           Tab(text: "Buchungen"),
           Tab(text: "Überblick"),
+          Tab(text: "Statistiken"),
         ]),
       ),
       body: Padding(
@@ -81,6 +83,7 @@ class MainApp extends HookWidget {
             child: BookingsView(),
           ),
           OverviewWidget(tabController),
+          StatisticsWidget(),
         ]),
       ),
     );

lib/widgets/statistics.dart

@@ -0,0 +1,204 @@
+import "package:fl_chart/fl_chart.dart";
+import "package:flutter/material.dart";
+import "package:flutter_hooks/flutter_hooks.dart";
+import "package:supernova/supernova.dart";
+
+import "../types/booking.dart";
+import "../types/global_data.dart";
+import "../types/price_type.dart";
+
+class StatisticsWidget extends HookWidget {
+  const StatisticsWidget({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final globalData = GlobalData();
+    useListenable(globalData.isTransactionInProgress);
+    useListenable(GlobalData.currentBookingTime);
+
+    final bookings = globalData.bookings.value;
+    final seatsSoldTotal = bookings.map((booking) => booking.seats.length).sum;
+    final seatsSoldPerPriceType = {
+      for (final priceType in PriceType.values)
+        priceType: bookings
+            .where((booking) => booking.priceType == priceType)
+            .map((booking) => booking.seats.length)
+            .sum,
+    };
+    final moneyMadeTotal = bookings.map((booking) => booking.pricePaid).sum;
+    final moneyMadeByPriceType = {
+      for (final priceType in [PriceType.normal, PriceType.reduced])
+        priceType: bookings
+            .where((booking) => booking.priceType == priceType)
+            .map((booking) => booking.pricePaid)
+            .sum,
+    };
+    final seatsPerGrade = <int?, int>{};
+    bookings.map(getGradeFromBooking).forEach((e) {
+      if (seatsPerGrade.containsKey(e)) {
+        seatsPerGrade[e] = seatsPerGrade[e]! + 1;
+      } else {
+        seatsPerGrade[e] = 1;
+      }
+    });
+
+    return SingleChildScrollView(
+      child: Column(
+        children: [
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              // Text("Sitze verkauft: $seatsSoldTotal"),
+              // Row(
+              //   mainAxisAlignment: MainAxisAlignment.spaceAround,
+              //   children: [
+              //     for (final entry in seatsSoldPerPriceType.entries)
+              //       Text("${entry.key.germanName}: ${entry.value}"),
+              //   ],
+              // ),
+              // Divider(
+              //   color: Colors.black,
+              // ),
+              // Text("Geld eingenommen: $moneyMadeTotal"),
+              // Row(
+              //   mainAxisAlignment: MainAxisAlignment.spaceAround,
+              //   children: [
+              //     for (final entry in moneyMadeByPriceType.entries)
+              //       Text("${entry.key.germanName}: ${entry.value}"),
+              //   ],
+              // ),
+              Column(
+                children: [
+                  Text("Sitze verkauft: $seatsSoldTotal"),
+                  SizedBox(
+                    width: 400,
+                    height: 400,
+                    child:
+                        PieChart(PieChartData(centerSpaceRadius: 0, sections: [
+                      for (final entry in seatsSoldPerPriceType.entries)
+                        PieChartSectionData(
+                          title: "${entry.value}",
+                          value: entry.value.toDouble(),
+                          radius: 80,
+                          color: getColour(entry.key),
+                        ),
+                    ])),
+                  ),
+                ],
+              ),
+              SizedBox(
+                height: 400,
+                child: VerticalDivider(
+                  color: Colors.black,
+                ),
+              ),
+              Column(
+                children: [
+                  Text("Eingenommenes Geld: $moneyMadeTotal€"),
+                  SizedBox(
+                    width: 400,
+                    height: 400,
+                    child:
+                        PieChart(PieChartData(centerSpaceRadius: 0, sections: [
+                      for (final entry in moneyMadeByPriceType.entries)
+                        PieChartSectionData(
+                          title: "${entry.value}€",
+                          value: entry.value.toDouble(),
+                          radius: 80,
+                          color: getColour(entry.key),
+                        ),
+                    ])),
+                  ),
+                ],
+              ),
+              SizedBox(
+                height: 400,
+                child: VerticalDivider(
+                  color: Colors.black,
+                ),
+              ),
+              Column(
+                children: [
+                  Text("Sitze pro Klassenstufe"),
+                  SizedBox(
+                    width: 400,
+                    height: 400,
+                    child:
+                        PieChart(PieChartData(centerSpaceRadius: 0, sections: [
+                      for (final entry in seatsPerGrade.entries)
+                        PieChartSectionData(
+                          title: "${entry.value}",
+                          value: entry.value.toDouble(),
+                          badgeWidget: Text("KS " + (entry.key ?? "nicht zugeordnet").toString()),
+                          badgePositionPercentageOffset: 1.3,
+                          radius: 80,
+                          color: getColourForGrade(entry.key),
+                        ),
+                    ])),
+                  ),
+                ],
+              ),
+            ],
+          ),
+          Padding(
+            padding: const EdgeInsets.only(left: 32),
+            child: Column(
+              children: [
+                for (final priceType in PriceType.values)
+                  Row(
+                    children: [
+                      Padding(
+                        padding: const EdgeInsets.only(right: 8),
+                        child: SizedBox(
+                          width: 10,
+                          height: 10,
+                          child: Container(
+                            color: getColour(priceType),
+                          ),
+                        ),
+                      ),
+                      Text(priceType.germanName)
+                    ],
+                  ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+int? getGradeFromBooking(Booking booking) {
+  final grade = booking.className.characters.where(isDigit).join();
+  if (grade.isEmpty) return null;
+  return int.parse(grade);
+}
+
+bool isDigit(String c) => double.tryParse(c) != null;
+
+Color getColour(PriceType priceType) {
+  switch (priceType) {
+    case PriceType.normal:
+      return Colors.green;
+    case PriceType.reduced:
+      return Colors.yellow;
+    case PriceType.free:
+      return Colors.red;
+  }
+}
+
+Color getColourForGrade(int? grade) {
+  if (grade == null) return Colors.grey;
+  const colours = [
+    Colors.blue,
+    Colors.yellow,
+    Colors.purple,
+    Colors.pink,
+    Colors.orange,
+    Colors.green,
+    Colors.red,
+    Colors.purpleAccent
+  ];
+  return colours[grade % colours.length];
+}

pubspec.lock

@@ -346,6 +346,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
+  fl_chart:
+    dependency: "direct main"
+    description:
+      name: fl_chart
+      sha256: "94307bef3a324a0d329d3ab77b2f0c6e5ed739185ffc029ed28c0f9b019ea7ef"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.69.0"
   flutter:
     dependency: "direct main"
     description: flutter

pubspec.yaml

@@ -9,6 +9,7 @@ environment:
 dependencies:
   collection: ^1.18.0
   encrypt: ^5.0.3
+  fl_chart: ^0.69.0
   flutter:
     sdk: flutter
   flutter_hooks: ^0.20.5

windows/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,9 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <printing/printing_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  PrintingPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PrintingPlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  printing
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST