Add workaround for pagination

lib/api/client.dart

@@ -8,6 +8,7 @@ class Client {
   final String _token;
   final String _base;
   int _maxPages;
+
   int get maxPages => _maxPages;
 
   String get base => _base;
@@ -38,8 +39,8 @@ class Client {
         port: uri.port,
         path: uri.path,
         query: uri.query,
-        queryParameters:
-            queryParameters, // Because dart takes a Map<String, String> here, it is only possible to sort by one parameter while the api supports n parameters.
+        queryParameters: queryParameters,
+        // Because dart takes a Map<String, String> here, it is only possible to sort by one parameter while the api supports n parameters.
         fragment: uri.fragment);
     return http.get(newUri, headers: _headers).then(_handleResponse);
   }
@@ -71,9 +72,16 @@ class Client {
       throw new ApiException(
           response.statusCode, response.request.url.toString());
     }
-    _maxPages = response.headers["x-pagination-total-pages"] != null
-        ? int.parse(response.headers["x-pagination-total-pages"])
-        : 0;
+    // FIXME: This is a workaround for when the client makes another
+    //  unrelated api request in between requesting multiple pages of the same thing.
+    //  To properly fix this, we need a way to pass the max number of pages somewhere else
+    //  and not save them in the global client which everyone uses.
+    //  This workaround only works when the other api requests in between two pages
+    //  are not using pagination.
+    if (response.headers["x-pagination-total-pages"] != null) {
+      _maxPages = int.parse(response.headers["x-pagination-total-pages"]);
+    }
+
     return _decoder.convert(response.body);
   }
 }
@@ -81,6 +89,7 @@ class Client {
 class ApiException implements Exception {
   final int errorCode;
   final String path;
+
   ApiException(this.errorCode, this.path);
 
   @override

lib/pages/list/list.dart

@@ -73,10 +73,6 @@ class _ListPageState extends State<ListPage> {
                                       .taskService
                                       .maxPages) {
                             _currentPage++;
-                            // FIXME: This does not get loaded until some time after the next (_tasks.length + 1) entry should have been rendered
-                            // This leads to errors because the render method tries to access an entry of _tasks with an index which does not exist
-                            // The load function gets actually called after the return below. I assume this is because of the setState() invocation
-                            // in _loadTasksForPage()?
                             _loadTasksForPage(_currentPage);
                           }
                           return index < _tasks.length