JsonSchemaForm.fromJson constructor

JsonSchemaForm.fromJson(Map<String, dynamic> json)

Implementation

factory JsonSchemaForm.fromJson(Map<String, dynamic> json) {
  final JsonSchema schema = JsonSchema.fromJson(json);

  final List<Field<Object>> fields = [];

  for (final JsonSchemaProperty element in schema.properties) {
    if (element.enumValues.isNotEmpty) {
      fields.add(AFSelectField(
        id: element.id,
        name: element.name,
        validators:
            buildValidators<List>(element, schema.isRequired(element)),
        values: element.enumValues,
        textBuilder: (e) => e.toString(),
        value: element.defaultValue ?? element.enumValues.first,
      ));
    } else {
      switch (element.type) {
        case JsonSchemaType.string:
          fields.add(AFTextField(
            id: element.id,
            name: element.name,
            validators:
                buildValidators<String>(element, schema.isRequired(element)),
            value: element.defaultValue,
            type: AFTextFieldType.text,
          ));
          break;
        case JsonSchemaType.number:
          final validators = buildValidators<num>(
            element,
            schema.isRequired(element),
          );

          final minimum = element.getOption('min');
          if (minimum != null) {
            validators.add(MinValueValidator(
              'The value should be greater or equal to $minimum',
              minimum,
            ));
          }

          final maximum = element.getOption('max');

          if (maximum != null) {
            validators.add(MaxValueValidator(
              'The value should be smaller or equal to $maximum',
              minimum,
            ));
          }

          fields.add(AFNumberField(
            id: element.id,
            name: element.name,
            value: element.defaultValue as num?,
            validators: validators,
          ));
          break;
        case JsonSchemaType.integer:
          final validators = buildValidators<num>(
            element,
            schema.isRequired(element),
          );

          final minimum = element.getOption('min');
          if (minimum != null) {
            validators.add(MinValueValidator(
              'The value should be greater or equal to $minimum',
              minimum,
            ));
          }

          final maximum = element.getOption('max');

          if (maximum != null) {
            validators.add(MaxValueValidator(
              'The value should be smaller or equal to $maximum',
              maximum,
            ));
          }

          fields.add(
            AFNumberField(
              id: element.id,
              name: element.name,
              value: element.defaultValue as int?,
              validators: [
                ...validators,
                IsIntegerValidator('Please enter a valid integer')
              ],
            ),
          );
          break;
        case JsonSchemaType.boolean:
          fields.add(AFBooleanField(
            id: element.id,
            name: element.name,
            value: element.defaultValue as bool? ?? false,
            validators:
                buildValidators<bool>(element, schema.isRequired(element)),
          ));
          break;
        default:
          debugPrint(
              '[Flutter Auto Form]: ${element.type} is not yet implemented.');
      }
    }
  }

  return JsonSchemaForm(fields);
}