fromJson static method

ChartWidgetData fromJson(Map<String, dynamic> json)

Null when the widget type this build does not know. A server that grows a widget kind must not break a dashboard that renders the rest — the same forward-compatibility rule the schema parser follows.

Implementation

static ChartWidgetData fromJson(Map<String, dynamic> json) {
  final rawLabels = json['labels'];
  final rawDatasets = json['datasets'];

  return ChartWidgetData(
    heading: json['heading'] is String ? json['heading'] as String : null,
    description: json['description'] is String
        ? json['description'] as String
        : null,
    chartType: json['chartType'] is String
        ? json['chartType'] as String
        : 'line',
    labels: [
      if (rawLabels is List)
        for (final label in rawLabels)
          if (label is String) label,
    ],
    datasets: [
      if (rawDatasets is List)
        for (final entry in rawDatasets)
          if (entry is Map<String, dynamic>)
            if (ChartDataset.fromJson(entry) case final dataset?) dataset,
    ],
  );
}