[Connection] Clean up receipts

lib/src/Connection.dart

@@ -461,15 +461,13 @@ class Connection {
                   break;
                 }
               }
-
               if (userTimestampMap[mxid].containsKey("ts")) {
-                if (receiptStateContent[eventID] == null)
-                  receiptStateContent[eventID] = {"m.read": {}};
-                else if (receiptStateContent[eventID]["m.read"] == null)
-                  receiptStateContent[eventID]["m.read"] = {};
-                receiptStateContent[eventID]["m.read"][mxid] = {
+                receiptStateContent[mxid] = {
+                  "event_id": eventID,
                   "ts": userTimestampMap[mxid]["ts"],
                 };
+                print(
+                    "$mxid hat $eventID um ${userTimestampMap[mxid]["ts"]} gelesen!");
               }
             }
           }

lib/src/Event.dart

@@ -101,15 +101,13 @@ class Event extends RoomState {
 
   /// Returns a list of [Receipt] instances for this event.
   List<Receipt> get receipts {
-    if (!(room.roomAccountData.containsKey("m.receipt") &&
-        room.roomAccountData["m.receipt"].content.containsKey(eventId)))
-      return [];
+    if (!(room.roomAccountData.containsKey("m.receipt"))) return [];
     List<Receipt> receiptsList = [];
-    for (var entry in room
-        .roomAccountData["m.receipt"].content[eventId]["m.read"].entries) {
-      receiptsList.add(Receipt(
-          room.states[entry.key]?.asUser ?? User(entry.key),
-          ChatTime(entry.value["ts"])));
+    for (var entry in room.roomAccountData["m.receipt"].content.entries) {
+      if (entry.value["event_id"] == eventId)
+        receiptsList.add(Receipt(
+            room.states[entry.key]?.asUser ?? User(entry.key),
+            ChatTime(entry.value["ts"])));
     }
     return receiptsList;
   }

test/Client_test.dart

@@ -130,9 +130,12 @@ void main() {
       expect(matrix.roomList.rooms[1].roomAccountData.length, 3);
       expect(
           matrix.roomList.rooms[1].roomAccountData["m.receipt"]
-                  .content["7365636s6r6432:example.com"]["m.read"]
-              ["@alice:example.com"]["ts"],
+              .content["@alice:example.com"]["ts"],
           1436451550453);
+      expect(
+          matrix.roomList.rooms[1].roomAccountData["m.receipt"]
+              .content["@alice:example.com"]["event_id"],
+          "7365636s6r6432:example.com");
       expect(matrix.roomList.rooms.length, 2);
       expect(matrix.roomList.rooms[1].canonicalAlias,
           "#famedlyContactDiscovery:${matrix.userID.split(":")[1]}");

test/Timeline_test.dart

@@ -103,10 +103,9 @@ void main() {
       room.roomAccountData["m.receipt"] = RoomAccountData.fromJson({
         "type": "m.receipt",
         "content": {
-          "1": {
-            "m.read": {
-              "@alice:example.com": {"ts": 1436451550453}
-            }
+          "@alice:example.com": {
+            "event_id": "1",
+            "ts": 1436451550453,
           }
         },
         "room_id": roomID,