| 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 |
| }); |
| } |