/
MapFields.ts
36 lines (28 loc) · 1.11 KB
/
MapFields.ts
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import { GraphQLSchema } from 'graphql';
import { Transform, Request, FieldNodeMappers } from '@graphql-tools/utils';
import TransformCompositeFields from './TransformCompositeFields';
export default class MapFields implements Transform {
private readonly transformer: TransformCompositeFields;
constructor(fieldNodeTransformerMap: FieldNodeMappers) {
this.transformer = new TransformCompositeFields(
(_typeName, _fieldName, fieldConfig) => fieldConfig,
(typeName, fieldName, fieldNode, fragments) => {
const typeTransformers = fieldNodeTransformerMap[typeName];
if (typeTransformers == null) {
return fieldNode;
}
const fieldNodeTransformer = typeTransformers[fieldName];
if (fieldNodeTransformer == null) {
return fieldNode;
}
return fieldNodeTransformer(fieldNode, fragments);
}
);
}
public transformSchema(schema: GraphQLSchema): GraphQLSchema {
return this.transformer.transformSchema(schema);
}
public transformRequest(request: Request): Request {
return this.transformer.transformRequest(request);
}
}