fromJson static method

InlineCarouselConfig? fromJson(Map<String, dynamic> json)

Parses a carousel templateConfig object. Returns null when the config is missing a slotKey or has no valid items — mirroring Android, where such campaigns are dropped rather than rendered empty.

Implementation

static InlineCarouselConfig? fromJson(Map<String, dynamic> json) {
  final slotKey = optString(json, 'slotKey');
  if (slotKey.isEmpty) return null;

  final itemsArr = optList(json, 'items');
  if (itemsArr == null) return null;

  final items = <CarouselItem>[];
  for (final raw in itemsArr) {
    if (raw is! Map) continue;
    final itemJson = raw.cast<String, dynamic>();
    final imageUrl = optString(itemJson, 'imageUrl');
    if (imageUrl.isEmpty) continue;
    final deepLink = optString(itemJson, 'deepLink');
    items.add(CarouselItem(
      imageUrl: imageUrl,
      deepLink: deepLink.isEmpty ? null : deepLink,
    ));
  }
  if (items.isEmpty) return null;

  final widthValue = json['width'];
  final width = widthValue is num && widthValue.toInt() > 0
      ? widthValue.toInt()
      : null;

  return InlineCarouselConfig(
    slotKey: slotKey,
    items: items,
    height: optInt(json, 'height', 180),
    width: width,
    autoPlay: optBool(json, 'autoPlay', true),
    autoPlayInterval: optInt(json, 'autoPlayInterval', 3000),
    animationDuration: optInt(json, 'animationDuration', 700),
    infiniteScroll: optBool(json, 'infiniteScroll', true),
    viewportFraction: optDouble(json, 'viewportFraction', 0.88),
    indicator: CarouselIndicatorConfig.fromJson(optMap(json, 'indicator')),
  );
}