Added Marianum Message pdf reader and backend

lib/api/mhsl/message/getMessages/getMessages.dart

@@ -0,0 +1,18 @@
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesResponse.dart';
+import 'package:marianum_mobile/api/mhsl/message/messageApi.dart';
+
+class GetMessages extends MessageApi<GetMessagesResponse> {
+
+  @override
+  GetMessagesResponse assemble(String raw) {
+    return GetMessagesResponse.fromJson(jsonDecode(raw));
+  }
+
+  @override
+  Future<http.Response> request(Uri uri) {
+    return http.get(uri);
+  }
+}

lib/api/mhsl/message/getMessages/getMessagesCache.dart

@@ -0,0 +1,22 @@
+import 'dart:convert';
+
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesResponse.dart';
+import 'package:marianum_mobile/api/requestCache.dart';
+
+import 'getMessages.dart';
+
+class GetMessagesCache extends RequestCache<GetMessagesResponse> {
+  GetMessagesCache({onUpdate, renew}) : super(RequestCache.cacheMinute, onUpdate, renew: renew) {
+    start("MarianumMobile", "message");
+  }
+
+  @override
+  GetMessagesResponse onLocalData(String json) {
+    return GetMessagesResponse.fromJson(jsonDecode(json));
+  }
+
+  @override
+  Future<GetMessagesResponse> onLoad() {
+    return GetMessages().run();
+  }
+}

lib/api/mhsl/message/getMessages/getMessagesResponse.dart

@@ -0,0 +1,27 @@
+import 'package:json_annotation/json_annotation.dart';
+import 'package:marianum_mobile/api/apiResponse.dart';
+
+part 'getMessagesResponse.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class GetMessagesResponse extends ApiResponse {
+  String base;
+  Set<GetMessagesResponseObject> messages;
+
+  GetMessagesResponse(this.base, this.messages);
+
+  factory GetMessagesResponse.fromJson(Map<String, dynamic> json) => _$GetMessagesResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$GetMessagesResponseToJson(this);
+}
+
+@JsonSerializable(explicitToJson: true)
+class GetMessagesResponseObject {
+  String name;
+  String date;
+  String url;
+
+  GetMessagesResponseObject(this.name, this.date, this.url);
+
+  factory GetMessagesResponseObject.fromJson(Map<String, dynamic> json) => _$GetMessagesResponseObjectFromJson(json);
+  Map<String, dynamic> toJson() => _$GetMessagesResponseObjectToJson(this);
+}

lib/api/mhsl/message/getMessages/getMessagesResponse.g.dart

@@ -0,0 +1,39 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'getMessagesResponse.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+GetMessagesResponse _$GetMessagesResponseFromJson(Map<String, dynamic> json) =>
+    GetMessagesResponse(
+      json['base'] as String,
+      (json['messages'] as List<dynamic>)
+          .map((e) =>
+              GetMessagesResponseObject.fromJson(e as Map<String, dynamic>))
+          .toSet(),
+    );
+
+Map<String, dynamic> _$GetMessagesResponseToJson(
+        GetMessagesResponse instance) =>
+    <String, dynamic>{
+      'base': instance.base,
+      'messages': instance.messages.map((e) => e.toJson()).toList(),
+    };
+
+GetMessagesResponseObject _$GetMessagesResponseObjectFromJson(
+        Map<String, dynamic> json) =>
+    GetMessagesResponseObject(
+      json['name'] as String,
+      json['date'] as String,
+      json['url'] as String,
+    );
+
+Map<String, dynamic> _$GetMessagesResponseObjectToJson(
+        GetMessagesResponseObject instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'date': instance.date,
+      'url': instance.url,
+    };

lib/api/mhsl/message/messageApi.dart

@@ -0,0 +1,22 @@
+import 'package:http/http.dart' as http;
+import '../../apiError.dart';
+import '../../apiRequest.dart';
+
+abstract class MessageApi<T> extends ApiRequest {
+  String path = "https://mhsl.eu/marianum/marianummobile/message/messages.json";
+  http.Response? response;
+
+  Future<http.Response>? request(Uri uri);
+  T assemble(String raw);
+
+  Future<T> run() async {
+    Uri endpoint = Uri.parse(path);
+
+    http.Response? data = await request(endpoint);
+    if(data == null) {
+      throw ApiError("Request could not be dispatched!");
+    }
+
+    return assemble(data.body);
+  }
+}

lib/app.dart

@@ -49,11 +49,11 @@ class _AppState extends State<App> {
         border: Border.symmetric(vertical: BorderSide.none, horizontal: BorderSide(color: Colors.grey, width: 1))
       ),
       screenTransitionAnimation: const ScreenTransitionAnimation(animateTabTransition: true, curve: Curves.ease, duration: Duration(milliseconds: 200)),
-      screens: [
-        const Timetable(),
-        const ChatList(),
-        Files(const []),
-        const Overhang(),
+      screens: const [
+        Timetable(),
+        ChatList(),
+        Files([]),
+        Overhang(),
       ],
       items: [
         PersistentBottomNavBarItem(

lib/data/message/messageProps.dart

@@ -0,0 +1,28 @@
+
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesCache.dart';
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesResponse.dart';
+import 'package:marianum_mobile/data/dataHolder.dart';
+
+import '../../api/apiResponse.dart';
+
+class MessageProps extends DataHolder {
+  GetMessagesResponse? _getMessagesResponse;
+  GetMessagesResponse get getMessagesResponse => _getMessagesResponse!;
+
+  @override
+  List<ApiResponse?> properties() {
+    return [_getMessagesResponse];
+  }
+
+  @override
+  void run({renew}) {
+    GetMessagesCache(
+        renew: renew,
+        onUpdate: (GetMessagesResponse data) => {
+          _getMessagesResponse = data,
+          notifyListeners(),
+        }
+    );
+  }
+
+}

lib/main.dart

@@ -18,6 +18,7 @@ import 'data/chatList/chatListProps.dart';
 import 'data/chatList/chatProps.dart';
 import 'data/accountModel.dart';
 import 'data/files/filesProps.dart';
+import 'data/message/messageProps.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -38,6 +39,8 @@ Future<void> main() async {
           ChangeNotifierProvider(create: (context) => ChatListProps()),
           ChangeNotifierProvider(create: (context) => ChatProps()),
           ChangeNotifierProvider(create: (context) => FilesProps()),
+
+          ChangeNotifierProvider(create: (context) => MessageProps()),
         ],
         child: const Main(),
       )

lib/screen/pages/more/message/message.dart

@@ -1,5 +1,10 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesResponse.dart';
+import 'package:marianum_mobile/screen/pages/more/message/messageView.dart';
+import 'package:provider/provider.dart';
+
+import '../../../../data/message/messageProps.dart';
 
 class Message extends StatefulWidget {
   const Message({Key? key}) : super(key: key);
@@ -9,17 +14,46 @@ class Message extends StatefulWidget {
 }
 
 class _MessageState extends State<Message> {
+  @override
+  void initState() {
+    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+      Provider.of<MessageProps>(context, listen: false).run();
+    });
+    super.initState();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
         title: const Text("Marianum Message"),
       ),
-      body: ListView.builder(itemBuilder: (context, index) {
-        return ListTile(
-            leading: const Icon(Icons.newspaper),
-            title: Text(index.toString()),
-            trailing: const Icon(Icons.arrow_right),
+      body: Consumer<MessageProps>(builder: (context, value, child) {
+        if(value.primaryLoading()) return const Center(child: CircularProgressIndicator());
+
+        return RefreshIndicator(
+          child: ListView.builder(
+              itemCount: value.getMessagesResponse.messages.length,
+              itemBuilder: (context, index) {
+                GetMessagesResponseObject message = value.getMessagesResponse.messages.toList()[index];
+                return ListTile(
+                  leading: const Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [Icon(Icons.newspaper)],
+                  ),
+                  title: Text(message.name, overflow: TextOverflow.ellipsis),
+                  subtitle: Text("vom ${message.date}"),
+                  trailing: const Icon(Icons.arrow_right),
+                  onTap: () {
+                    Navigator.push(context, MaterialPageRoute(builder: (context) => MessageView(basePath: value.getMessagesResponse.base, message: message)));
+                  },
+                );
+              }
+          ),
+          onRefresh: () {
+            Provider.of<MessageProps>(context, listen: false).run(renew: true);
+            return Future.delayed(const Duration(seconds: 3));
+          },
         );
       }),
     );

lib/screen/pages/more/message/messageView.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/material.dart';
+import 'package:marianum_mobile/api/mhsl/message/getMessages/getMessagesResponse.dart';
+import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+class MessageView extends StatefulWidget {
+  final String basePath;
+  final GetMessagesResponseObject message;
+  const MessageView({Key? key, required this.basePath, required this.message}) : super(key: key);
+
+  @override
+  State<MessageView> createState() => _MessageViewState();
+}
+
+class _MessageViewState extends State<MessageView> {
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.message.name),
+      ),
+      body: SfPdfViewer.network(
+        widget.basePath + widget.message.url,
+        enableHyperlinkNavigation: true,
+        onDocumentLoadFailed: (PdfDocumentLoadFailedDetails e) {
+          Navigator.of(context).pop();
+          showDialog(context: context, builder: (context) {
+            return AlertDialog(
+              title: const Text("Fehler beim öffnen"),
+              content: Text("Dokument '${widget.message.name}' konnte nicht geladen werden:\n${e.description}"),
+              actions: [
+                TextButton(onPressed: () {
+                  Navigator.of(context).pop();
+                }, child: const Text("Ok"))
+              ],
+            );
+          });
+        },
+        onHyperlinkClicked: (PdfHyperlinkClickedDetails e) {
+          showDialog(
+            context: context,
+            builder: (context) {
+              return AlertDialog(
+                title: const Text("Link öffnen"),
+                content: Text("Möchtest du den folgenden Link öffnen?\n${e.uri}"),
+                actions: [
+                  TextButton(onPressed: () {
+                    Navigator.of(context).pop();
+                  }, child: const Text("Abbrechen")),
+                  TextButton(onPressed: () {
+                    launchUrl(Uri.parse(e.uri), mode: LaunchMode.externalApplication);
+                  }, child: const Text("Öffnen")),
+                ],
+              );
+            },
+          );
+        },
+      ),
+    );
+  }
+}