sort nodes in farm by status

Author: AlaaElattar

app/lib/screens/farm_details.dart

@@ -343,11 +343,13 @@ class _FarmDetailsState extends State<FarmDetails> {
                                                           .text,
                                                   wallets: widget.wallets
                                                       .where((w) =>
-                                                          double.tryParse(w
-                                                                  .stellarBalances['TFT']!) !=
+                                                          double.tryParse(
+                                                                  w.stellarBalances[
+                                                                      'TFT']!) !=
                                                               null &&
-                                                          double.parse(w
-                                                                  .stellarBalances['TFT']!) >=
+                                                          double.parse(
+                                                                  w.stellarBalances[
+                                                                      'TFT']!) >=
                                                               0)
                                                       .toList(),
                                                   onSelectToAddress:
@@ -527,7 +529,20 @@ class _FarmDetailsState extends State<FarmDetails> {
                           physics: const NeverScrollableScrollPhysics(),
                           itemCount: widget.farm.nodes.length,
                           itemBuilder: (context, index) {
-                            final node = widget.farm.nodes[index];
+                            final sortedNodes = List.from(widget.farm.nodes)
+                              ..sort((a, b) {
+                                if (a.status == NodeStatus.Up &&
+                                    b.status != NodeStatus.Up) {
+                                  return -1;
+                                } else if (a.status != NodeStatus.Up &&
+                                    b.status == NodeStatus.Up) {
+                                  return 1;
+                                } else {
+                                  return 0;
+                                }
+                              });
+
+                            final node = sortedNodes[index];
                             return Card(
                               margin: const EdgeInsets.symmetric(
                                   vertical: 4.0, horizontal: 0.0),