graphql-language-service-utils

const getQueryFacts: (schema?: any, documentString?: string) => OperationFacts;

collectVariables: (
    schema: GraphQLSchema,
    documentAST: DocumentNode
) => VariableToType;

getASTNodeAtPosition: (
    query: string,
    ast: ASTNode,
    point: TPosition
) => ASTNode | undefined;

getFragmentDependencies: (
    operationString: string,
    fragmentDefinitions?: Map<string, FragmentDefinitionNode> | null | undefined
) => FragmentDefinitionNode[];

getFragmentDependenciesForAST: (
    parsedOperation: DocumentNode,
    fragmentDefinitions: Map<string, FragmentDefinitionNode>
) => FragmentDefinitionNode[];

getOperationASTFacts: (
    documentAST: DocumentNode,
    schema?: GraphQLSchema | null
) => OperationASTFacts;

getOperationFacts: (
    schema?: GraphQLSchema | null,
    documentString?: string | null
) => OperationFacts | undefined;

getVariablesJSONSchema: (
    variableToType: VariableToType,
    options?: JSONSchemaOptions
) => JSONSchema6;

locToRange: (text: string, loc: Location) => Range;

offsetToPosition: (text: string, loc: number) => Position;

pointToOffset: (text: string, point: TPosition) => number;

validateWithCustomRules: (
    schema: GraphQLSchema,
    ast: DocumentNode,
    customRules?: Array<ValidationRule> | null,
    isRelayCompatMode?: boolean,
    isSchemaDocument?: boolean
) => Array<GraphQLError>;

type JSONSchemaOptions = {
    useMarkdownDescription?: boolean;
};

type OperationFacts = {
    documentAST: DocumentNode;
} & OperationASTFacts;

type QueryFacts = OperationFacts;

type VariableToType = {
    [variable: string]: GraphQLInputType;
};