@graphql-mesh/runtime
Version:
276 lines (275 loc) • 11.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getMesh = exports.wrapFetchWithPlugins = void 0;
const graphql_1 = require("graphql");
const core_1 = require("@envelop/core");
const extended_validation_1 = require("@envelop/extended-validation");
const cross_helpers_1 = require("@graphql-mesh/cross-helpers");
const utils_1 = require("@graphql-mesh/utils");
const delegate_1 = require("@graphql-tools/delegate");
const utils_2 = require("@graphql-tools/utils");
const fetch_1 = require("@whatwg-node/fetch");
const constants_js_1 = require("./constants.js");
const in_context_sdk_js_1 = require("./in-context-sdk.js");
const useSubschema_js_1 = require("./useSubschema.js");
const memoizedGetEnvelopedFactory = (0, utils_2.memoize1)(function getEnvelopedFactory(plugins) {
return (0, core_1.envelop)({
plugins,
});
});
const memoizedGetOperationType = (0, utils_2.memoize1)((document) => {
const operationAST = (0, graphql_1.getOperationAST)(document, undefined);
if (!operationAST) {
throw new Error('Must provide document with a valid operation');
}
return operationAST.operation;
});
function wrapFetchWithPlugins(plugins) {
return async function wrappedFetchFn(url, options, context, info) {
if (url != null && typeof url !== 'string') {
throw new TypeError(`First parameter(url) of 'fetch' must be a string, got ${(0, utils_2.inspect)(url)}`);
}
if (options != null && typeof options !== 'object') {
throw new TypeError(`Second parameter(options) of 'fetch' must be an object, got ${(0, utils_2.inspect)(options)}`);
}
if (context != null && typeof context !== 'object') {
throw new TypeError(`Third parameter(context) of 'fetch' must be an object, got ${(0, utils_2.inspect)(context)}`);
}
if (info != null && typeof info !== 'object') {
throw new TypeError(`Fourth parameter(info) of 'fetch' must be an object, got ${(0, utils_2.inspect)(info)}`);
}
let fetchFn;
const doneHooks = [];
for (const plugin of plugins) {
if (plugin?.onFetch != null) {
const doneHook = await plugin.onFetch({
fetchFn,
setFetchFn(newFetchFn) {
fetchFn = newFetchFn;
},
url,
options,
context,
info,
});
if (doneHook) {
doneHooks.push(doneHook);
}
}
}
let response = await fetchFn(url, options, context, info);
for (const doneHook of doneHooks) {
await doneHook({
response,
setResponse(newResponse) {
response = newResponse;
},
});
}
return response;
};
}
exports.wrapFetchWithPlugins = wrapFetchWithPlugins;
// Use in-context-sdk for tracing
function createProxyingResolverFactory(apiName, rootTypeMap) {
return function createProxyingResolver({ operation }) {
const rootType = rootTypeMap.get(operation);
return function proxyingResolver(root, args, context, info) {
if (!context?.[apiName]?.[rootType.name]?.[info.fieldName]) {
throw new Error(`${info.fieldName} couldn't find in ${rootType.name} of ${apiName} as a ${operation}`);
}
return context[apiName][rootType.name][info.fieldName]({ root, args, context, info });
};
};
}
async function getMesh(options) {
const rawSources = [];
const { pubsub = new utils_1.PubSub(), cache, logger = new utils_1.DefaultLogger('🕸️ Mesh'), additionalEnvelopPlugins = [], sources, merger, additionalResolvers = [], additionalTypeDefs = [], transforms = [], fetchFn = fetch_1.fetch, } = options;
const getMeshLogger = logger.child('GetMesh');
getMeshLogger.debug(`Getting subschemas from source handlers`);
let failed = false;
const initialPluginList = [
// TODO: Not a good practise to expect users to be a Yoga user
(0, core_1.useExtendContext)(({ request, req, connectionParams, }) => {
// Maybe Node-like environment
if (req?.headers) {
return {
headers: (0, utils_1.getHeadersObj)(req.headers),
connectionParams,
};
}
// Fetch environment
if (request?.headers) {
return {
headers: (0, utils_1.getHeadersObj)(request.headers),
connectionParams,
};
}
return {};
}),
(0, core_1.useExtendContext)(() => ({
pubsub,
cache,
logger,
[constants_js_1.MESH_CONTEXT_SYMBOL]: true,
})),
{
onFetch({ setFetchFn }) {
setFetchFn(fetchFn);
},
},
...additionalEnvelopPlugins,
];
const wrappedFetchFn = wrapFetchWithPlugins(initialPluginList);
await Promise.allSettled(sources.map(async (apiSource) => {
const apiName = apiSource.name;
const sourceLogger = logger.child(apiName);
sourceLogger.debug(`Generating the schema`);
try {
const source = await apiSource.handler.getMeshSource({
fetchFn: wrappedFetchFn,
});
sourceLogger.debug(`The schema has been generated successfully`);
let apiSchema = source.schema;
sourceLogger.debug(`Analyzing transforms`);
let transforms;
const { wrapTransforms, noWrapTransforms } = (0, utils_1.groupTransforms)(apiSource.transforms);
if (!wrapTransforms?.length && noWrapTransforms?.length) {
sourceLogger.debug(`${noWrapTransforms.length} bare transforms found and applying`);
apiSchema = (0, utils_1.applySchemaTransforms)(apiSchema, source, null, noWrapTransforms);
}
else {
transforms = apiSource.transforms;
}
const rootTypeMap = (0, utils_2.getRootTypeMap)(apiSchema);
rawSources.push({
name: apiName,
schema: apiSchema,
executor: source.executor,
transforms,
contextVariables: source.contextVariables || {},
handler: apiSource.handler,
batch: 'batch' in source ? source.batch : true,
merge: source.merge,
createProxyingResolver: createProxyingResolverFactory(apiName, rootTypeMap),
});
}
catch (e) {
sourceLogger.error(`Failed to generate the schema`, e);
failed = true;
}
}));
if (failed) {
throw new Error(`Schemas couldn't be generated successfully. Check for the logs by running Mesh${cross_helpers_1.process.env.DEBUG == null
? ' with DEBUG=1 environmental variable to get more verbose output'
: ''}.`);
}
getMeshLogger.debug(`Schemas have been generated by the source handlers`);
getMeshLogger.debug(`Merging schemas using the defined merging strategy.`);
const unifiedSubschema = await merger.getUnifiedSchema({
rawSources,
typeDefs: additionalTypeDefs,
resolvers: additionalResolvers,
});
unifiedSubschema.transforms = unifiedSubschema.transforms || [];
for (const rootLevelTransform of transforms) {
if (rootLevelTransform.noWrap) {
if (rootLevelTransform.transformSchema) {
unifiedSubschema.schema = rootLevelTransform.transformSchema(unifiedSubschema.schema, unifiedSubschema);
}
}
else {
unifiedSubschema.transforms.push(rootLevelTransform);
}
}
let inContextSDK$;
const subschema = new delegate_1.Subschema(unifiedSubschema);
const plugins = [
(0, core_1.useEngine)({
validate: graphql_1.validate,
parse: utils_1.parseWithCache,
specifiedRules: graphql_1.specifiedRules,
}),
(0, useSubschema_js_1.useSubschema)(subschema),
(0, core_1.useExtendContext)(() => {
if (!inContextSDK$) {
const onDelegateHooks = [];
for (const plugin of initialPluginList) {
if (plugin?.onDelegate != null) {
onDelegateHooks.push(plugin.onDelegate);
}
}
inContextSDK$ = (0, in_context_sdk_js_1.getInContextSDK)(subschema.transformedSchema, rawSources, logger, onDelegateHooks);
}
return inContextSDK$;
}),
(0, extended_validation_1.useExtendedValidation)({
rules: [extended_validation_1.OneOfInputObjectsRule],
}),
...initialPluginList,
];
const EMPTY_ROOT_VALUE = {};
const EMPTY_CONTEXT_VALUE = {};
const EMPTY_VARIABLES_VALUE = {};
function createExecutor(globalContext = EMPTY_CONTEXT_VALUE) {
const getEnveloped = memoizedGetEnvelopedFactory(plugins);
const { schema, parse, execute, subscribe, contextFactory } = getEnveloped(globalContext);
return async function meshExecutor(documentOrSDL, variableValues = EMPTY_VARIABLES_VALUE, contextValue = EMPTY_CONTEXT_VALUE, rootValue = EMPTY_ROOT_VALUE, operationName) {
const document = typeof documentOrSDL === 'string' ? parse(documentOrSDL) : documentOrSDL;
const executeFn = memoizedGetOperationType(document) === 'subscription' ? subscribe : execute;
return executeFn({
schema,
document,
contextValue: await contextFactory(contextValue),
rootValue,
variableValues: variableValues,
operationName,
});
};
}
function sdkRequesterFactory(globalContext) {
const executor = createExecutor(globalContext);
return async function sdkRequester(...args) {
const result = await executor(...args);
if ((0, utils_2.isAsyncIterable)(result)) {
return (0, utils_2.mapAsyncIterator)(result, extractDataOrThrowErrors);
}
return extractDataOrThrowErrors(result);
};
}
function meshDestroy() {
return pubsub.publish('destroy', undefined);
}
return {
get schema() {
return subschema.transformedSchema;
},
rawSources,
cache,
pubsub,
destroy: meshDestroy,
logger,
plugins,
get getEnveloped() {
return memoizedGetEnvelopedFactory(plugins);
},
createExecutor,
get execute() {
return createExecutor();
},
get subscribe() {
return createExecutor();
},
sdkRequesterFactory,
};
}
exports.getMesh = getMesh;
function extractDataOrThrowErrors(result) {
if (result.errors) {
if (result.errors.length === 1) {
throw result.errors[0];
}
throw new AggregateError(result.errors);
}
return result.data;
}