findConflictsBetweenSubSelectionSets function

List<Conflict> findConflictsBetweenSubSelectionSets(ValidationCtx context, Map<SelectionSetNode, FieldsAndFragmentNames> cachedFieldsAndFragmentNames, PairSet comparedFragmentPairs, bool areMutuallyExclusive, GraphQLNamedType? parentType1, SelectionSetNode selectionSet1, GraphQLNamedType? parentType2, SelectionSetNode selectionSet2,)

Find all conflicts found between two selection sets, including those found via spreading in fragments. Called when determining if conflicts exist between the sub-fields of two overlapping fields.

Implementation

List<Conflict> findConflictsBetweenSubSelectionSets(
  ValidationCtx context,
  Map<SelectionSetNode, FieldsAndFragmentNames> cachedFieldsAndFragmentNames,
  PairSet comparedFragmentPairs,
  bool areMutuallyExclusive,
  GraphQLNamedType? parentType1,
  SelectionSetNode selectionSet1,
  GraphQLNamedType? parentType2,
  SelectionSetNode selectionSet2,
) {
  final conflicts = <Conflict>[];

  final fg1 = getFieldsAndFragmentNames(
    context,
    cachedFieldsAndFragmentNames,
    parentType1,
    selectionSet1,
  );
  final fieldMap1 = fg1.fieldMap;
  final fragmentNames1 = fg1.fragmentNames;
  final fg2 = getFieldsAndFragmentNames(
    context,
    cachedFieldsAndFragmentNames,
    parentType2,
    selectionSet2,
  );
  final fieldMap2 = fg2.fieldMap;
  final fragmentNames2 = fg2.fragmentNames;

  // (H) First, collect all conflicts between these two collections of field.
  collectConflictsBetween(
    context,
    conflicts,
    cachedFieldsAndFragmentNames,
    comparedFragmentPairs,
    areMutuallyExclusive,
    fieldMap1,
    fieldMap2,
  );

  // (I) Then collect conflicts between the first collection of fields and
  // those referenced by each fragment name associated with the second.
  for (final fragmentName2 in fragmentNames2) {
    collectConflictsBetweenFieldsAndFragment(
      context,
      conflicts,
      cachedFieldsAndFragmentNames,
      comparedFragmentPairs,
      areMutuallyExclusive,
      fieldMap1,
      fragmentName2,
    );
  }

  // (I) Then collect conflicts between the second collection of fields and
  // those referenced by each fragment name associated with the first.
  for (final fragmentName1 in fragmentNames1) {
    collectConflictsBetweenFieldsAndFragment(
      context,
      conflicts,
      cachedFieldsAndFragmentNames,
      comparedFragmentPairs,
      areMutuallyExclusive,
      fieldMap2,
      fragmentName1,
    );
  }

  // (J) Also collect conflicts between any fragment names by the first and
  // fragment names by the second. This compares each item in the first set of
  // names to each item in the second set of names.
  for (final fragmentName1 in fragmentNames1) {
    for (final fragmentName2 in fragmentNames2) {
      collectConflictsBetweenFragments(
        context,
        conflicts,
        cachedFieldsAndFragmentNames,
        comparedFragmentPairs,
        areMutuallyExclusive,
        fragmentName1,
        fragmentName2,
      );
    }
  }
  return conflicts;
}