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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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