new: custom cmds (#313)

lib/data/model/server/server.ext.dart

@@ -0,0 +1,39 @@
+part of 'server.dart';
+
+extension ServerX on Server {
+  String get topRightStr {
+    switch (state) {
+      case ServerState.disconnected:
+        return l10n.disconnected;
+      case ServerState.finished:
+        final cmdTemp = status.customCmds['temperature'];
+        final temp = status.temps.first;
+        final sensorTemp = SensorItem.findPreferTempVal(status.sensors);
+        final temperatureVal = () {
+          if (temp != null) {
+            return temp;
+          }
+          if (sensorTemp != null) {
+            return sensorTemp;
+          }
+          return null;
+        }();
+        final tempVal = temperatureVal != null
+            ? '${temperatureVal.toStringAsFixed(1)}°C'
+            : null;
+        final upTime = status.more[StatusCmdType.uptime];
+        final items = [tempVal ?? cmdTemp, upTime];
+        final str = items.where((e) => e != null && e.isNotEmpty).join(' | ');
+        if (str.isEmpty) return l10n.noResult;
+        return str;
+      case ServerState.loading:
+        return l10n.serverTabLoading;
+      case ServerState.connected:
+        return l10n.connected;
+      case ServerState.connecting:
+        return l10n.serverTabConnecting;
+      case ServerState.failed:
+        return status.err ?? l10n.serverTabFailed;
+    }
+  }
+}