ingestMultiple function

Future<List> ingestMultiple(BuildContext context, List<DataField> fields)

Implementation

Future<List<dynamic>> ingestMultiple(
    BuildContext context, List<DataField<dynamic>> fields) {
  List<dynamic> selected = List.generate(fields.length, (index) => null);
  int mindex = 0;
  PageController controller = PageController(viewportFraction: 1);

  return showDialog(
      context: context,
      builder: (context) => Dialog(
            child: ExpandablePageView(
              controller: controller,
              children: [
                ...fields.map((e) {
                  int index = mindex;
                  mindex++;
                  Widget w = Padding(
                    padding: const EdgeInsets.all(14),
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        e.getDataType().getSupportedFetchers().first(
                            context, e, (value) => selected[index] = value, () {
                          if (index < fields.length - 1) {
                            controller.nextPage(
                                duration: const Duration(milliseconds: 500),
                                curve: Curves.easeInOutCirc);
                          } else {
                            Navigator.pop(context, selected);
                          }
                        }),
                        Row(
                          children: [
                            const Spacer(),
                            TextButton(
                                onPressed: () {
                                  if (index == 0) {
                                    Navigator.pop(context, null);
                                  } else {
                                    controller.previousPage(
                                        duration:
                                            const Duration(milliseconds: 500),
                                        curve: Curves.easeInOutCirc);
                                  }
                                },
                                child: Text(index == 0 ? "Cancel" : "Back")),
                            TextButton(
                                onPressed: () {
                                  if (index < fields.length - 1) {
                                    controller.nextPage(
                                        duration:
                                            const Duration(milliseconds: 500),
                                        curve: Curves.easeInOutCirc);
                                  } else {
                                    Navigator.pop(context, selected);
                                  }
                                },
                                child: Text(index == fields.length - 1
                                    ? "Done"
                                    : "Next")),
                          ],
                        )
                      ],
                    ),
                  );
                  return w;
                })
              ],
            ),
          )).then((value) => value ?? selected);
}