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- import isPromise from "./jsutils/isPromise.mjs";
- import { parse } from "./language/parser.mjs";
- import { validate } from "./validation/validate.mjs";
- import { validateSchema } from "./type/validate.mjs";
- import { execute } from "./execution/execute.mjs";
- /**
- * This is the primary entry point function for fulfilling GraphQL operations
- * by parsing, validating, and executing a GraphQL document along side a
- * GraphQL schema.
- *
- * More sophisticated GraphQL servers, such as those which persist queries,
- * may wish to separate the validation and execution phases to a static time
- * tooling step, and a server runtime step.
- *
- * Accepts either an object with named arguments, or individual arguments:
- *
- * schema:
- * The GraphQL type system to use when validating and executing a query.
- * source:
- * A GraphQL language formatted string representing the requested operation.
- * rootValue:
- * The value provided as the first argument to resolver functions on the top
- * level type (e.g. the query object type).
- * contextValue:
- * The context value is provided as an argument to resolver functions after
- * field arguments. It is used to pass shared information useful at any point
- * during executing this query, for example the currently logged in user and
- * connections to databases or other services.
- * variableValues:
- * A mapping of variable name to runtime value to use for all variables
- * defined in the requestString.
- * operationName:
- * The name of the operation to use if requestString contains multiple
- * possible operations. Can be omitted if requestString contains only
- * one operation.
- * fieldResolver:
- * A resolver function to use when one is not provided by the schema.
- * If not provided, the default field resolver is used (which looks for a
- * value or method on the source value with the field's name).
- * typeResolver:
- * A type resolver function to use when none is provided by the schema.
- * If not provided, the default type resolver is used (which looks for a
- * `__typename` field or alternatively calls the `isTypeOf` method).
- */
- export function graphql(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver) {
- var _arguments = arguments;
- /* eslint-enable no-redeclare */
- // Always return a Promise for a consistent API.
- return new Promise(function (resolve) {
- return resolve( // Extract arguments from object args if provided.
- _arguments.length === 1 ? graphqlImpl(argsOrSchema) : graphqlImpl({
- schema: argsOrSchema,
- source: source,
- rootValue: rootValue,
- contextValue: contextValue,
- variableValues: variableValues,
- operationName: operationName,
- fieldResolver: fieldResolver,
- typeResolver: typeResolver
- }));
- });
- }
- /**
- * The graphqlSync function also fulfills GraphQL operations by parsing,
- * validating, and executing a GraphQL document along side a GraphQL schema.
- * However, it guarantees to complete synchronously (or throw an error) assuming
- * that all field resolvers are also synchronous.
- */
- export function graphqlSync(argsOrSchema, source, rootValue, contextValue, variableValues, operationName, fieldResolver, typeResolver) {
- /* eslint-enable no-redeclare */
- // Extract arguments from object args if provided.
- var result = arguments.length === 1 ? graphqlImpl(argsOrSchema) : graphqlImpl({
- schema: argsOrSchema,
- source: source,
- rootValue: rootValue,
- contextValue: contextValue,
- variableValues: variableValues,
- operationName: operationName,
- fieldResolver: fieldResolver,
- typeResolver: typeResolver
- }); // Assert that the execution was synchronous.
- if (isPromise(result)) {
- throw new Error('GraphQL execution failed to complete synchronously.');
- }
- return result;
- }
- function graphqlImpl(args) {
- var schema = args.schema,
- source = args.source,
- rootValue = args.rootValue,
- contextValue = args.contextValue,
- variableValues = args.variableValues,
- operationName = args.operationName,
- fieldResolver = args.fieldResolver,
- typeResolver = args.typeResolver; // Validate Schema
- var schemaValidationErrors = validateSchema(schema);
- if (schemaValidationErrors.length > 0) {
- return {
- errors: schemaValidationErrors
- };
- } // Parse
- var document;
- try {
- document = parse(source);
- } catch (syntaxError) {
- return {
- errors: [syntaxError]
- };
- } // Validate
- var validationErrors = validate(schema, document);
- if (validationErrors.length > 0) {
- return {
- errors: validationErrors
- };
- } // Execute
- return execute({
- schema: schema,
- document: document,
- rootValue: rootValue,
- contextValue: contextValue,
- variableValues: variableValues,
- operationName: operationName,
- fieldResolver: fieldResolver,
- typeResolver: typeResolver
- });
- }
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