[Event] Fix wrong id reference

lib/src/Event.dart

@@ -137,7 +137,7 @@ class Event {
       }
 
     return Event(
-      jsonObj["id"],
+      jsonObj["event_id"],
       User.fromJson(jsonObj, room),
       ChatTime(jsonObj["origin_server_ts"]),
       stateKey: User(jsonObj["state_key"]),

lib/src/Room.dart

@@ -184,7 +184,7 @@ class Room {
     EventUpdate eventUpdate =
         EventUpdate(type: "timeline", roomID: id, eventType: type, content: {
       "type": type,
-      "id": messageID,
+      "event_id": messageID,
       "sender": client.userID,
       "status": 0,
       "origin_server_ts": now,
@@ -202,7 +202,7 @@ class Room {
     // Send the text and on success, store and display a *sent* event.
     final dynamic res = await sendText(message, txid: messageID);
 
-    if (res is ErrorResponse) {
+    if (res is ErrorResponse || !(res["event_id"] is String)) {
       // On error, set status to -1
       eventUpdate.content["status"] = -1;
       client.connection.onEvent.add(eventUpdate);
@@ -210,14 +210,13 @@ class Room {
         client.store.storeEventUpdate(eventUpdate);
       });
     } else {
-      final String newEventID = res["event_id"];
       eventUpdate.content["status"] = 1;
-      eventUpdate.content["id"] = newEventID;
+      eventUpdate.content["event_id"] = res["event_id"];
       client.connection.onEvent.add(eventUpdate);
       await client.store?.transaction(() {
         client.store.storeEventUpdate(eventUpdate);
       });
-      return newEventID;
+      return res["event_id"];
     }
     return null;
   }

lib/src/Timeline.dart

@@ -57,7 +57,7 @@ class Timeline {
             if (events[i].content.containsKey("txid") &&
                     events[i].content["txid"] ==
                         eventUpdate.content["content"]["txid"] ||
-                events[i].id == eventUpdate.content["id"] ||
+                events[i].id == eventUpdate.content["event_id"] ||
                 (eventUpdate.content.containsKey("unsigned") &&
                     eventUpdate.content["unsigned"]["transaction_id"]
                         is String &&
@@ -69,9 +69,6 @@ class Timeline {
             events[i] = Event.fromJson(eventUpdate.content, room);
           }
         } else {
-          if (!eventUpdate.content.containsKey("id"))
-            eventUpdate.content["id"] = eventUpdate.content["event_id"];
-
           User user = await room.client.store
               ?.getUser(matrixID: eventUpdate.content["sender"], room: room);
           if (user != null) {

test/Timeline_test.dart

@@ -62,7 +62,7 @@ void main() {
             "content": {"msgtype": "m.text", "body": "Testcase"},
             "sender": "@alice:example.com",
             "status": 2,
-            "id": "1",
+            "event_id": "1",
             "origin_server_ts": testTimeStamp
           }));
 
@@ -75,7 +75,7 @@ void main() {
             "content": {"msgtype": "m.text", "body": "Testcase"},
             "sender": "@alice:example.com",
             "status": 2,
-            "id": "2",
+            "event_id": "2",
             "origin_server_ts": testTimeStamp - 1000
           }));
 
@@ -116,7 +116,7 @@ void main() {
             "content": {"msgtype": "m.text", "body": "test"},
             "sender": "@alice:example.com",
             "status": 2,
-            "id": "42",
+            "event_id": "42",
             "unsigned": {"transaction_id": "1234"},
             "origin_server_ts": DateTime.now().millisecondsSinceEpoch
           }));
@@ -140,7 +140,7 @@ void main() {
             "content": {"msgtype": "m.text", "body": "Testcase"},
             "sender": "@alice:example.com",
             "status": 0,
-            "id": "abc",
+            "event_id": "abc",
             "origin_server_ts": testTimeStamp
           }));
       await new Future.delayed(new Duration(milliseconds: 50));