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Diffstat (limited to 'alarm/node_modules/graphql/subscription/subscribe.js')
-rw-r--r-- | alarm/node_modules/graphql/subscription/subscribe.js | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/alarm/node_modules/graphql/subscription/subscribe.js b/alarm/node_modules/graphql/subscription/subscribe.js deleted file mode 100644 index 9f8225d..0000000 --- a/alarm/node_modules/graphql/subscription/subscribe.js +++ /dev/null @@ -1,192 +0,0 @@ -"use strict"; - -Object.defineProperty(exports, "__esModule", { - value: true -}); -exports.subscribe = subscribe; -exports.createSourceEventStream = createSourceEventStream; - -var _inspect = _interopRequireDefault(require("../jsutils/inspect.js")); - -var _isAsyncIterable = _interopRequireDefault(require("../jsutils/isAsyncIterable.js")); - -var _Path = require("../jsutils/Path.js"); - -var _GraphQLError = require("../error/GraphQLError.js"); - -var _locatedError = require("../error/locatedError.js"); - -var _values = require("../execution/values.js"); - -var _execute = require("../execution/execute.js"); - -var _getOperationRootType = require("../utilities/getOperationRootType.js"); - -var _mapAsyncIterator = _interopRequireDefault(require("./mapAsyncIterator.js")); - -function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } - -function subscribe(argsOrSchema, document, rootValue, contextValue, variableValues, operationName, fieldResolver, subscribeFieldResolver) { - /* eslint-enable no-redeclare */ - // Extract arguments from object args if provided. - return arguments.length === 1 ? subscribeImpl(argsOrSchema) : subscribeImpl({ - schema: argsOrSchema, - document: document, - rootValue: rootValue, - contextValue: contextValue, - variableValues: variableValues, - operationName: operationName, - fieldResolver: fieldResolver, - subscribeFieldResolver: subscribeFieldResolver - }); -} -/** - * This function checks if the error is a GraphQLError. If it is, report it as - * an ExecutionResult, containing only errors and no data. Otherwise treat the - * error as a system-class error and re-throw it. - */ - - -function reportGraphQLError(error) { - if (error instanceof _GraphQLError.GraphQLError) { - return { - errors: [error] - }; - } - - throw error; -} - -function subscribeImpl(args) { - var schema = args.schema, - document = args.document, - rootValue = args.rootValue, - contextValue = args.contextValue, - variableValues = args.variableValues, - operationName = args.operationName, - fieldResolver = args.fieldResolver, - subscribeFieldResolver = args.subscribeFieldResolver; - var sourcePromise = createSourceEventStream(schema, document, rootValue, contextValue, variableValues, operationName, subscribeFieldResolver); // For each payload yielded from a subscription, map it over the normal - // GraphQL `execute` function, with `payload` as the rootValue. - // This implements the "MapSourceToResponseEvent" algorithm described in - // the GraphQL specification. The `execute` function provides the - // "ExecuteSubscriptionEvent" algorithm, as it is nearly identical to the - // "ExecuteQuery" algorithm, for which `execute` is also used. - - var mapSourceToResponse = function mapSourceToResponse(payload) { - return (0, _execute.execute)({ - schema: schema, - document: document, - rootValue: payload, - contextValue: contextValue, - variableValues: variableValues, - operationName: operationName, - fieldResolver: fieldResolver - }); - }; // Resolve the Source Stream, then map every source value to a - // ExecutionResult value as described above. - - - return sourcePromise.then(function (resultOrStream) { - return (// Note: Flow can't refine isAsyncIterable, so explicit casts are used. - (0, _isAsyncIterable.default)(resultOrStream) ? (0, _mapAsyncIterator.default)(resultOrStream, mapSourceToResponse, reportGraphQLError) : resultOrStream - ); - }); -} -/** - * Implements the "CreateSourceEventStream" algorithm described in the - * GraphQL specification, resolving the subscription source event stream. - * - * Returns a Promise which resolves to either an AsyncIterable (if successful) - * or an ExecutionResult (error). The promise will be rejected if the schema or - * other arguments to this function are invalid, or if the resolved event stream - * is not an async iterable. - * - * If the client-provided arguments to this function do not result in a - * compliant subscription, a GraphQL Response (ExecutionResult) with - * descriptive errors and no data will be returned. - * - * If the the source stream could not be created due to faulty subscription - * resolver logic or underlying systems, the promise will resolve to a single - * ExecutionResult containing `errors` and no `data`. - * - * If the operation succeeded, the promise resolves to the AsyncIterable for the - * event stream returned by the resolver. - * - * A Source Event Stream represents a sequence of events, each of which triggers - * a GraphQL execution for that event. - * - * This may be useful when hosting the stateful subscription service in a - * different process or machine than the stateless GraphQL execution engine, - * or otherwise separating these two steps. For more on this, see the - * "Supporting Subscriptions at Scale" information in the GraphQL specification. - */ - - -function createSourceEventStream(schema, document, rootValue, contextValue, variableValues, operationName, fieldResolver) { - // If arguments are missing or incorrectly typed, this is an internal - // developer mistake which should throw an early error. - (0, _execute.assertValidExecutionArguments)(schema, document, variableValues); - return new Promise(function (resolve) { - // If a valid context cannot be created due to incorrect arguments, - // this will throw an error. - var exeContext = (0, _execute.buildExecutionContext)(schema, document, rootValue, contextValue, variableValues, operationName, fieldResolver); - resolve( // Return early errors if execution context failed. - Array.isArray(exeContext) ? { - errors: exeContext - } : executeSubscription(exeContext)); - }).catch(reportGraphQLError); -} - -function executeSubscription(exeContext) { - var schema = exeContext.schema, - operation = exeContext.operation, - variableValues = exeContext.variableValues, - rootValue = exeContext.rootValue; - var type = (0, _getOperationRootType.getOperationRootType)(schema, operation); - var fields = (0, _execute.collectFields)(exeContext, type, operation.selectionSet, Object.create(null), Object.create(null)); - var responseNames = Object.keys(fields); - var responseName = responseNames[0]; - var fieldNodes = fields[responseName]; - var fieldNode = fieldNodes[0]; - var fieldName = fieldNode.name.value; - var fieldDef = (0, _execute.getFieldDef)(schema, type, fieldName); - - if (!fieldDef) { - throw new _GraphQLError.GraphQLError("The subscription field \"".concat(fieldName, "\" is not defined."), fieldNodes); - } - - var path = (0, _Path.addPath)(undefined, responseName, type.name); - var info = (0, _execute.buildResolveInfo)(exeContext, fieldDef, fieldNodes, type, path); // Coerce to Promise for easier error handling and consistent return type. - - return new Promise(function (resolveResult) { - var _fieldDef$subscribe; - - // Implements the "ResolveFieldEventStream" algorithm from GraphQL specification. - // It differs from "ResolveFieldValue" due to providing a different `resolveFn`. - // Build a JS object of arguments from the field.arguments AST, using the - // variables scope to fulfill any variable references. - var args = (0, _values.getArgumentValues)(fieldDef, fieldNodes[0], variableValues); // The resolve function's optional third argument is a context value that - // is provided to every resolve function within an execution. It is commonly - // used to represent an authenticated user, or request-specific caches. - - var contextValue = exeContext.contextValue; // Call the `subscribe()` resolver or the default resolver to produce an - // AsyncIterable yielding raw payloads. - - var resolveFn = (_fieldDef$subscribe = fieldDef.subscribe) !== null && _fieldDef$subscribe !== void 0 ? _fieldDef$subscribe : exeContext.fieldResolver; - resolveResult(resolveFn(rootValue, args, contextValue, info)); - }).then(function (eventStream) { - if (eventStream instanceof Error) { - throw (0, _locatedError.locatedError)(eventStream, fieldNodes, (0, _Path.pathToArray)(path)); - } // Assert field returned an event stream, otherwise yield an error. - - - if (!(0, _isAsyncIterable.default)(eventStream)) { - throw new Error('Subscription field must return Async Iterable. ' + "Received: ".concat((0, _inspect.default)(eventStream), ".")); - } - - return eventStream; - }, function (error) { - throw (0, _locatedError.locatedError)(error, fieldNodes, (0, _Path.pathToArray)(path)); - }); -} |