mirror of
https://github.com/swc-project/swc.git
synced 2024-12-23 05:32:09 +03:00
143 lines
4.4 KiB
TypeScript
143 lines
4.4 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/graphql.js
|
|
|
|
|
|
import isPromise from './jsutils/isPromise.js';
|
|
import { parse } from './language/parser.js';
|
|
import { validate } from './validation/validate.js';
|
|
import { validateSchema } from './type/validate.js';
|
|
import { execute } from './execution/execute.js';
|
|
/**
|
|
* 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) {
|
|
/* eslint-enable no-redeclare */
|
|
// Always return a Promise for a consistent API.
|
|
return new Promise(resolve => resolve( // Extract arguments from object args if provided.
|
|
arguments.length === 1 ? graphqlImpl(argsOrSchema) : graphqlImpl({
|
|
schema: argsOrSchema,
|
|
source,
|
|
rootValue,
|
|
contextValue,
|
|
variableValues,
|
|
operationName,
|
|
fieldResolver,
|
|
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.
|
|
const result = arguments.length === 1 ? graphqlImpl(argsOrSchema) : graphqlImpl({
|
|
schema: argsOrSchema,
|
|
source,
|
|
rootValue,
|
|
contextValue,
|
|
variableValues,
|
|
operationName,
|
|
fieldResolver,
|
|
typeResolver
|
|
}); // Assert that the execution was synchronous.
|
|
|
|
if (isPromise(result)) {
|
|
throw new Error('GraphQL execution failed to complete synchronously.');
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
function graphqlImpl(args) {
|
|
const {
|
|
schema,
|
|
source,
|
|
rootValue,
|
|
contextValue,
|
|
variableValues,
|
|
operationName,
|
|
fieldResolver,
|
|
typeResolver
|
|
} = args; // Validate Schema
|
|
|
|
const schemaValidationErrors = validateSchema(schema);
|
|
|
|
if (schemaValidationErrors.length > 0) {
|
|
return {
|
|
errors: schemaValidationErrors
|
|
};
|
|
} // Parse
|
|
|
|
|
|
let document;
|
|
|
|
try {
|
|
document = parse(source);
|
|
} catch (syntaxError) {
|
|
return {
|
|
errors: [syntaxError]
|
|
};
|
|
} // Validate
|
|
|
|
|
|
const validationErrors = validate(schema, document);
|
|
|
|
if (validationErrors.length > 0) {
|
|
return {
|
|
errors: validationErrors
|
|
};
|
|
} // Execute
|
|
|
|
|
|
return execute({
|
|
schema,
|
|
document,
|
|
rootValue,
|
|
contextValue,
|
|
variableValues,
|
|
operationName,
|
|
fieldResolver,
|
|
typeResolver
|
|
});
|
|
} |