Further restructuring of chatBubble.dart, added chatMessage.dart

lib/screen/pages/talk/chatMessage.dart

@@ -0,0 +1,50 @@
+import 'dart:convert';
+
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/material.dart';
+import 'package:marianum_mobile/api/marianumcloud/talk/chat/richObjectStringProcessor.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../../api/marianumcloud/talk/chat/getChatResponse.dart';
+
+class ChatMessage {
+  String originalMessage;
+  Map<String, RichObjectString>? originalData;
+
+  RichObjectString? file;
+  String content = "";
+
+  bool get containsFile => file != null;
+
+  ChatMessage({required this.originalMessage, this.originalData}) {
+    if(originalData?.containsKey("file") ?? false) {
+      file = originalData?['file'];
+      content = file?.name ?? "Datei";
+    } else {
+      content = RichObjectStringProcessor.parseToString(originalMessage, originalData);
+    }
+  }
+
+  Future<Widget> getWidget() async {
+    SharedPreferences preferences = await SharedPreferences.getInstance();
+
+    if(file == null) {
+      return SelectableText(content);
+    }
+
+    return CachedNetworkImage(
+      errorWidget: (context, url, error) {
+        return Text("Datei: ${file!.name}", style: const TextStyle(fontWeight: FontWeight.bold));
+      },
+      alignment: Alignment.center,
+      placeholder: (context, url) {
+        return const Padding(padding: EdgeInsets.all(10), child: CircularProgressIndicator());
+      },
+      fadeInDuration: const Duration(seconds: 1),
+      imageUrl: "https://cloud.marianum-fulda.de/core/preview?fileId=${file!.id}&x=100&y=-1&a=1",
+      httpHeaders: {
+        "Authorization": "Basic ${base64.encode(utf8.encode("${preferences.getString("username")}:${preferences.getString("password")}"))}"
+      },
+    );
+  }
+}