Get and show the list of conversations

lib/helpers/conversations_helper.dart

@@ -0,0 +1,36 @@
+import 'package:comunic/models/api_request.dart';
+import 'package:comunic/models/conversation.dart';
+
+/// Conversation helper
+///
+/// @author Pierre HUBERT
+
+class ConversationsHelper {
+  /// Download the list of conversations from the server
+  Future<List<Conversation>> downloadList() async {
+    final response =
+        await APIRequest(uri: "conversations/getList", needLogin: true).exec();
+
+    if (response.code != 200) return null;
+
+    try {
+      List<Conversation> list = List();
+      response.getArray().forEach((f) =>
+          list.add(Conversation(
+            id: f["ID"],
+            ownerID: f["ID_owner"],
+            lastActive: f["last_active"],
+            name: f["name"] == false ? null : f["name"],
+            following: f["following"] == 1,
+            sawLastMessage: f["saw_last_message"] == 1,
+            members: f["members"].map<int>((f) => int.parse(f)).toList(),
+          )));
+
+      return list;
+
+    } on Exception catch(e){
+      print(e.toString());
+      return null;
+    }
+  }
+}