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import inspect from "../../jsutils/inspect.mjs";
import { GraphQLError } from "../../error/GraphQLError.mjs";
import { getNamedType, isLeafType } from "../../type/definition.mjs";
/**
* Scalar leafs
*
* A GraphQL document is valid only if all leaf fields (fields without
* sub selections) are of scalar or enum types.
*/
export function ScalarLeafsRule(context) {
return {
Field: function Field(node) {
var type = context.getType();
var selectionSet = node.selectionSet;
if (type) {
if (isLeafType(getNamedType(type))) {
if (selectionSet) {
var fieldName = node.name.value;
var typeStr = inspect(type);
context.reportError(new GraphQLError("Field \"".concat(fieldName, "\" must not have a selection since type \"").concat(typeStr, "\" has no subfields."), selectionSet));
}
} else if (!selectionSet) {
var _fieldName = node.name.value;
var _typeStr = inspect(type);
context.reportError(new GraphQLError("Field \"".concat(_fieldName, "\" of type \"").concat(_typeStr, "\" must have a selection of subfields. Did you mean \"").concat(_fieldName, " { ... }\"?"), node));
}
}
}
};
}
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