Initial Sample.

graphql-subscription/node_modules/graphql/execution/collectFields.d.ts

@@ -0,0 +1,45 @@
+import type { ObjMap } from '../jsutils/ObjMap';
+import type {
+  FieldNode,
+  FragmentDefinitionNode,
+  SelectionSetNode,
+} from '../language/ast';
+import type { GraphQLObjectType } from '../type/definition';
+import type { GraphQLSchema } from '../type/schema';
+/**
+ * Given a selectionSet, collects all of the fields and returns them.
+ *
+ * CollectFields requires the "runtime type" of an object. For a field that
+ * returns an Interface or Union type, the "runtime type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+export declare function collectFields(
+  schema: GraphQLSchema,
+  fragments: ObjMap<FragmentDefinitionNode>,
+  variableValues: {
+    [variable: string]: unknown;
+  },
+  runtimeType: GraphQLObjectType,
+  selectionSet: SelectionSetNode,
+): Map<string, ReadonlyArray<FieldNode>>;
+/**
+ * Given an array of field nodes, collects all of the subfields of the passed
+ * in fields, and returns them at the end.
+ *
+ * CollectSubFields requires the "return type" of an object. For a field that
+ * returns an Interface or Union type, the "return type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+export declare function collectSubfields(
+  schema: GraphQLSchema,
+  fragments: ObjMap<FragmentDefinitionNode>,
+  variableValues: {
+    [variable: string]: unknown;
+  },
+  returnType: GraphQLObjectType,
+  fieldNodes: ReadonlyArray<FieldNode>,
+): Map<string, ReadonlyArray<FieldNode>>;

graphql-subscription/node_modules/graphql/execution/collectFields.js

@@ -0,0 +1,229 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.collectFields = collectFields;
+exports.collectSubfields = collectSubfields;
+
+var _kinds = require('../language/kinds.js');
+
+var _definition = require('../type/definition.js');
+
+var _directives = require('../type/directives.js');
+
+var _typeFromAST = require('../utilities/typeFromAST.js');
+
+var _values = require('./values.js');
+
+/**
+ * Given a selectionSet, collects all of the fields and returns them.
+ *
+ * CollectFields requires the "runtime type" of an object. For a field that
+ * returns an Interface or Union type, the "runtime type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+function collectFields(
+  schema,
+  fragments,
+  variableValues,
+  runtimeType,
+  selectionSet,
+) {
+  const fields = new Map();
+  collectFieldsImpl(
+    schema,
+    fragments,
+    variableValues,
+    runtimeType,
+    selectionSet,
+    fields,
+    new Set(),
+  );
+  return fields;
+}
+/**
+ * Given an array of field nodes, collects all of the subfields of the passed
+ * in fields, and returns them at the end.
+ *
+ * CollectSubFields requires the "return type" of an object. For a field that
+ * returns an Interface or Union type, the "return type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+
+function collectSubfields(
+  schema,
+  fragments,
+  variableValues,
+  returnType,
+  fieldNodes,
+) {
+  const subFieldNodes = new Map();
+  const visitedFragmentNames = new Set();
+
+  for (const node of fieldNodes) {
+    if (node.selectionSet) {
+      collectFieldsImpl(
+        schema,
+        fragments,
+        variableValues,
+        returnType,
+        node.selectionSet,
+        subFieldNodes,
+        visitedFragmentNames,
+      );
+    }
+  }
+
+  return subFieldNodes;
+}
+
+function collectFieldsImpl(
+  schema,
+  fragments,
+  variableValues,
+  runtimeType,
+  selectionSet,
+  fields,
+  visitedFragmentNames,
+) {
+  for (const selection of selectionSet.selections) {
+    switch (selection.kind) {
+      case _kinds.Kind.FIELD: {
+        if (!shouldIncludeNode(variableValues, selection)) {
+          continue;
+        }
+
+        const name = getFieldEntryKey(selection);
+        const fieldList = fields.get(name);
+
+        if (fieldList !== undefined) {
+          fieldList.push(selection);
+        } else {
+          fields.set(name, [selection]);
+        }
+
+        break;
+      }
+
+      case _kinds.Kind.INLINE_FRAGMENT: {
+        if (
+          !shouldIncludeNode(variableValues, selection) ||
+          !doesFragmentConditionMatch(schema, selection, runtimeType)
+        ) {
+          continue;
+        }
+
+        collectFieldsImpl(
+          schema,
+          fragments,
+          variableValues,
+          runtimeType,
+          selection.selectionSet,
+          fields,
+          visitedFragmentNames,
+        );
+        break;
+      }
+
+      case _kinds.Kind.FRAGMENT_SPREAD: {
+        const fragName = selection.name.value;
+
+        if (
+          visitedFragmentNames.has(fragName) ||
+          !shouldIncludeNode(variableValues, selection)
+        ) {
+          continue;
+        }
+
+        visitedFragmentNames.add(fragName);
+        const fragment = fragments[fragName];
+
+        if (
+          !fragment ||
+          !doesFragmentConditionMatch(schema, fragment, runtimeType)
+        ) {
+          continue;
+        }
+
+        collectFieldsImpl(
+          schema,
+          fragments,
+          variableValues,
+          runtimeType,
+          fragment.selectionSet,
+          fields,
+          visitedFragmentNames,
+        );
+        break;
+      }
+    }
+  }
+}
+/**
+ * Determines if a field should be included based on the `@include` and `@skip`
+ * directives, where `@skip` has higher precedence than `@include`.
+ */
+
+function shouldIncludeNode(variableValues, node) {
+  const skip = (0, _values.getDirectiveValues)(
+    _directives.GraphQLSkipDirective,
+    node,
+    variableValues,
+  );
+
+  if ((skip === null || skip === void 0 ? void 0 : skip.if) === true) {
+    return false;
+  }
+
+  const include = (0, _values.getDirectiveValues)(
+    _directives.GraphQLIncludeDirective,
+    node,
+    variableValues,
+  );
+
+  if (
+    (include === null || include === void 0 ? void 0 : include.if) === false
+  ) {
+    return false;
+  }
+
+  return true;
+}
+/**
+ * Determines if a fragment is applicable to the given type.
+ */
+
+function doesFragmentConditionMatch(schema, fragment, type) {
+  const typeConditionNode = fragment.typeCondition;
+
+  if (!typeConditionNode) {
+    return true;
+  }
+
+  const conditionalType = (0, _typeFromAST.typeFromAST)(
+    schema,
+    typeConditionNode,
+  );
+
+  if (conditionalType === type) {
+    return true;
+  }
+
+  if ((0, _definition.isAbstractType)(conditionalType)) {
+    return schema.isSubType(conditionalType, type);
+  }
+
+  return false;
+}
+/**
+ * Implements the logic to compute the key of a given field's entry
+ */
+
+function getFieldEntryKey(node) {
+  return node.alias ? node.alias.value : node.name.value;
+}

graphql-subscription/node_modules/graphql/execution/collectFields.mjs

@@ -0,0 +1,213 @@
+import { Kind } from '../language/kinds.mjs';
+import { isAbstractType } from '../type/definition.mjs';
+import {
+  GraphQLIncludeDirective,
+  GraphQLSkipDirective,
+} from '../type/directives.mjs';
+import { typeFromAST } from '../utilities/typeFromAST.mjs';
+import { getDirectiveValues } from './values.mjs';
+/**
+ * Given a selectionSet, collects all of the fields and returns them.
+ *
+ * CollectFields requires the "runtime type" of an object. For a field that
+ * returns an Interface or Union type, the "runtime type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+
+export function collectFields(
+  schema,
+  fragments,
+  variableValues,
+  runtimeType,
+  selectionSet,
+) {
+  const fields = new Map();
+  collectFieldsImpl(
+    schema,
+    fragments,
+    variableValues,
+    runtimeType,
+    selectionSet,
+    fields,
+    new Set(),
+  );
+  return fields;
+}
+/**
+ * Given an array of field nodes, collects all of the subfields of the passed
+ * in fields, and returns them at the end.
+ *
+ * CollectSubFields requires the "return type" of an object. For a field that
+ * returns an Interface or Union type, the "return type" will be the actual
+ * object type returned by that field.
+ *
+ * @internal
+ */
+
+export function collectSubfields(
+  schema,
+  fragments,
+  variableValues,
+  returnType,
+  fieldNodes,
+) {
+  const subFieldNodes = new Map();
+  const visitedFragmentNames = new Set();
+
+  for (const node of fieldNodes) {
+    if (node.selectionSet) {
+      collectFieldsImpl(
+        schema,
+        fragments,
+        variableValues,
+        returnType,
+        node.selectionSet,
+        subFieldNodes,
+        visitedFragmentNames,
+      );
+    }
+  }
+
+  return subFieldNodes;
+}
+
+function collectFieldsImpl(
+  schema,
+  fragments,
+  variableValues,
+  runtimeType,
+  selectionSet,
+  fields,
+  visitedFragmentNames,
+) {
+  for (const selection of selectionSet.selections) {
+    switch (selection.kind) {
+      case Kind.FIELD: {
+        if (!shouldIncludeNode(variableValues, selection)) {
+          continue;
+        }
+
+        const name = getFieldEntryKey(selection);
+        const fieldList = fields.get(name);
+
+        if (fieldList !== undefined) {
+          fieldList.push(selection);
+        } else {
+          fields.set(name, [selection]);
+        }
+
+        break;
+      }
+
+      case Kind.INLINE_FRAGMENT: {
+        if (
+          !shouldIncludeNode(variableValues, selection) ||
+          !doesFragmentConditionMatch(schema, selection, runtimeType)
+        ) {
+          continue;
+        }
+
+        collectFieldsImpl(
+          schema,
+          fragments,
+          variableValues,
+          runtimeType,
+          selection.selectionSet,
+          fields,
+          visitedFragmentNames,
+        );
+        break;
+      }
+
+      case Kind.FRAGMENT_SPREAD: {
+        const fragName = selection.name.value;
+
+        if (
+          visitedFragmentNames.has(fragName) ||
+          !shouldIncludeNode(variableValues, selection)
+        ) {
+          continue;
+        }
+
+        visitedFragmentNames.add(fragName);
+        const fragment = fragments[fragName];
+
+        if (
+          !fragment ||
+          !doesFragmentConditionMatch(schema, fragment, runtimeType)
+        ) {
+          continue;
+        }
+
+        collectFieldsImpl(
+          schema,
+          fragments,
+          variableValues,
+          runtimeType,
+          fragment.selectionSet,
+          fields,
+          visitedFragmentNames,
+        );
+        break;
+      }
+    }
+  }
+}
+/**
+ * Determines if a field should be included based on the `@include` and `@skip`
+ * directives, where `@skip` has higher precedence than `@include`.
+ */
+
+function shouldIncludeNode(variableValues, node) {
+  const skip = getDirectiveValues(GraphQLSkipDirective, node, variableValues);
+
+  if ((skip === null || skip === void 0 ? void 0 : skip.if) === true) {
+    return false;
+  }
+
+  const include = getDirectiveValues(
+    GraphQLIncludeDirective,
+    node,
+    variableValues,
+  );
+
+  if (
+    (include === null || include === void 0 ? void 0 : include.if) === false
+  ) {
+    return false;
+  }
+
+  return true;
+}
+/**
+ * Determines if a fragment is applicable to the given type.
+ */
+
+function doesFragmentConditionMatch(schema, fragment, type) {
+  const typeConditionNode = fragment.typeCondition;
+
+  if (!typeConditionNode) {
+    return true;
+  }
+
+  const conditionalType = typeFromAST(schema, typeConditionNode);
+
+  if (conditionalType === type) {
+    return true;
+  }
+
+  if (isAbstractType(conditionalType)) {
+    return schema.isSubType(conditionalType, type);
+  }
+
+  return false;
+}
+/**
+ * Implements the logic to compute the key of a given field's entry
+ */
+
+function getFieldEntryKey(node) {
+  return node.alias ? node.alias.value : node.name.value;
+}

graphql-subscription/node_modules/graphql/execution/execute.d.ts

@@ -0,0 +1,185 @@
+import type { Maybe } from '../jsutils/Maybe';
+import type { ObjMap } from '../jsutils/ObjMap';
+import type { Path } from '../jsutils/Path';
+import type { PromiseOrValue } from '../jsutils/PromiseOrValue';
+import type { GraphQLFormattedError } from '../error/GraphQLError';
+import { GraphQLError } from '../error/GraphQLError';
+import type {
+  DocumentNode,
+  FieldNode,
+  FragmentDefinitionNode,
+  OperationDefinitionNode,
+} from '../language/ast';
+import type {
+  GraphQLField,
+  GraphQLFieldResolver,
+  GraphQLObjectType,
+  GraphQLResolveInfo,
+  GraphQLTypeResolver,
+} from '../type/definition';
+import type { GraphQLSchema } from '../type/schema';
+/**
+ * Terminology
+ *
+ * "Definitions" are the generic name for top-level statements in the document.
+ * Examples of this include:
+ * 1) Operations (such as a query)
+ * 2) Fragments
+ *
+ * "Operations" are a generic name for requests in the document.
+ * Examples of this include:
+ * 1) query,
+ * 2) mutation
+ *
+ * "Selections" are the definitions that can appear legally and at
+ * single level of the query. These include:
+ * 1) field references e.g `a`
+ * 2) fragment "spreads" e.g. `...c`
+ * 3) inline fragment "spreads" e.g. `...on Type { a }`
+ */
+/**
+ * Data that must be available at all points during query execution.
+ *
+ * Namely, schema of the type system that is currently executing,
+ * and the fragments defined in the query document
+ */
+export interface ExecutionContext {
+  schema: GraphQLSchema;
+  fragments: ObjMap<FragmentDefinitionNode>;
+  rootValue: unknown;
+  contextValue: unknown;
+  operation: OperationDefinitionNode;
+  variableValues: {
+    [variable: string]: unknown;
+  };
+  fieldResolver: GraphQLFieldResolver<any, any>;
+  typeResolver: GraphQLTypeResolver<any, any>;
+  subscribeFieldResolver: GraphQLFieldResolver<any, any>;
+  errors: Array<GraphQLError>;
+}
+/**
+ * The result of GraphQL execution.
+ *
+ *   - `errors` is included when any errors occurred as a non-empty array.
+ *   - `data` is the result of a successful execution of the query.
+ *   - `extensions` is reserved for adding non-standard properties.
+ */
+export interface ExecutionResult<
+  TData = ObjMap<unknown>,
+  TExtensions = ObjMap<unknown>,
+> {
+  errors?: ReadonlyArray<GraphQLError>;
+  data?: TData | null;
+  extensions?: TExtensions;
+}
+export interface FormattedExecutionResult<
+  TData = ObjMap<unknown>,
+  TExtensions = ObjMap<unknown>,
+> {
+  errors?: ReadonlyArray<GraphQLFormattedError>;
+  data?: TData | null;
+  extensions?: TExtensions;
+}
+export interface ExecutionArgs {
+  schema: GraphQLSchema;
+  document: DocumentNode;
+  rootValue?: unknown;
+  contextValue?: unknown;
+  variableValues?: Maybe<{
+    readonly [variable: string]: unknown;
+  }>;
+  operationName?: Maybe<string>;
+  fieldResolver?: Maybe<GraphQLFieldResolver<any, any>>;
+  typeResolver?: Maybe<GraphQLTypeResolver<any, any>>;
+  subscribeFieldResolver?: Maybe<GraphQLFieldResolver<any, any>>;
+}
+/**
+ * Implements the "Executing requests" section of the GraphQL specification.
+ *
+ * Returns either a synchronous ExecutionResult (if all encountered resolvers
+ * are synchronous), or a Promise of an ExecutionResult that will eventually be
+ * resolved and never rejected.
+ *
+ * If the arguments to this function do not result in a legal execution context,
+ * a GraphQLError will be thrown immediately explaining the invalid input.
+ */
+export declare function execute(
+  args: ExecutionArgs,
+): PromiseOrValue<ExecutionResult>;
+/**
+ * Also implements the "Executing requests" section of the GraphQL specification.
+ * However, it guarantees to complete synchronously (or throw an error) assuming
+ * that all field resolvers are also synchronous.
+ */
+export declare function executeSync(args: ExecutionArgs): ExecutionResult;
+/**
+ * Essential assertions before executing to provide developer feedback for
+ * improper use of the GraphQL library.
+ *
+ * @internal
+ */
+export declare function assertValidExecutionArguments(
+  schema: GraphQLSchema,
+  document: DocumentNode,
+  rawVariableValues: Maybe<{
+    readonly [variable: string]: unknown;
+  }>,
+): void;
+/**
+ * Constructs a ExecutionContext object from the arguments passed to
+ * execute, which we will pass throughout the other execution methods.
+ *
+ * Throws a GraphQLError if a valid execution context cannot be created.
+ *
+ * @internal
+ */
+export declare function buildExecutionContext(
+  args: ExecutionArgs,
+): ReadonlyArray<GraphQLError> | ExecutionContext;
+/**
+ * @internal
+ */
+export declare function buildResolveInfo(
+  exeContext: ExecutionContext,
+  fieldDef: GraphQLField<unknown, unknown>,
+  fieldNodes: ReadonlyArray<FieldNode>,
+  parentType: GraphQLObjectType,
+  path: Path,
+): GraphQLResolveInfo;
+/**
+ * If a resolveType function is not given, then a default resolve behavior is
+ * used which attempts two strategies:
+ *
+ * First, See if the provided value has a `__typename` field defined, if so, use
+ * that value as name of the resolved type.
+ *
+ * Otherwise, test each possible type for the abstract type by calling
+ * isTypeOf for the object being coerced, returning the first type that matches.
+ */
+export declare const defaultTypeResolver: GraphQLTypeResolver<unknown, unknown>;
+/**
+ * If a resolve function is not given, then a default resolve behavior is used
+ * which takes the property of the source object of the same name as the field
+ * and returns it as the result, or if it's a function, returns the result
+ * of calling that function while passing along args and context value.
+ */
+export declare const defaultFieldResolver: GraphQLFieldResolver<
+  unknown,
+  unknown
+>;
+/**
+ * This method looks up the field on the given type definition.
+ * It has special casing for the three introspection fields,
+ * __schema, __type and __typename. __typename is special because
+ * it can always be queried as a field, even in situations where no
+ * other fields are allowed, like on a Union. __schema and __type
+ * could get automatically added to the query type, but that would
+ * require mutating type definitions, which would cause issues.
+ *
+ * @internal
+ */
+export declare function getFieldDef(
+  schema: GraphQLSchema,
+  parentType: GraphQLObjectType,
+  fieldNode: FieldNode,
+): Maybe<GraphQLField<unknown, unknown>>;

graphql-subscription/node_modules/graphql/execution/index.d.ts

@@ -0,0 +1,18 @@
+export { pathToArray as responsePathAsArray } from '../jsutils/Path';
+export {
+  execute,
+  executeSync,
+  defaultFieldResolver,
+  defaultTypeResolver,
+} from './execute';
+export type {
+  ExecutionArgs,
+  ExecutionResult,
+  FormattedExecutionResult,
+} from './execute';
+export { subscribe, createSourceEventStream } from './subscribe';
+export {
+  getArgumentValues,
+  getVariableValues,
+  getDirectiveValues,
+} from './values';

graphql-subscription/node_modules/graphql/execution/index.js

@@ -0,0 +1,73 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+Object.defineProperty(exports, 'createSourceEventStream', {
+  enumerable: true,
+  get: function () {
+    return _subscribe.createSourceEventStream;
+  },
+});
+Object.defineProperty(exports, 'defaultFieldResolver', {
+  enumerable: true,
+  get: function () {
+    return _execute.defaultFieldResolver;
+  },
+});
+Object.defineProperty(exports, 'defaultTypeResolver', {
+  enumerable: true,
+  get: function () {
+    return _execute.defaultTypeResolver;
+  },
+});
+Object.defineProperty(exports, 'execute', {
+  enumerable: true,
+  get: function () {
+    return _execute.execute;
+  },
+});
+Object.defineProperty(exports, 'executeSync', {
+  enumerable: true,
+  get: function () {
+    return _execute.executeSync;
+  },
+});
+Object.defineProperty(exports, 'getArgumentValues', {
+  enumerable: true,
+  get: function () {
+    return _values.getArgumentValues;
+  },
+});
+Object.defineProperty(exports, 'getDirectiveValues', {
+  enumerable: true,
+  get: function () {
+    return _values.getDirectiveValues;
+  },
+});
+Object.defineProperty(exports, 'getVariableValues', {
+  enumerable: true,
+  get: function () {
+    return _values.getVariableValues;
+  },
+});
+Object.defineProperty(exports, 'responsePathAsArray', {
+  enumerable: true,
+  get: function () {
+    return _Path.pathToArray;
+  },
+});
+Object.defineProperty(exports, 'subscribe', {
+  enumerable: true,
+  get: function () {
+    return _subscribe.subscribe;
+  },
+});
+
+var _Path = require('../jsutils/Path.js');
+
+var _execute = require('./execute.js');
+
+var _subscribe = require('./subscribe.js');
+
+var _values = require('./values.js');

graphql-subscription/node_modules/graphql/execution/index.mjs

@@ -0,0 +1,13 @@
+export { pathToArray as responsePathAsArray } from '../jsutils/Path.mjs';
+export {
+  execute,
+  executeSync,
+  defaultFieldResolver,
+  defaultTypeResolver,
+} from './execute.mjs';
+export { subscribe, createSourceEventStream } from './subscribe.mjs';
+export {
+  getArgumentValues,
+  getVariableValues,
+  getDirectiveValues,
+} from './values.mjs';

graphql-subscription/node_modules/graphql/execution/mapAsyncIterator.d.ts

@@ -0,0 +1,9 @@
+import type { PromiseOrValue } from '../jsutils/PromiseOrValue';
+/**
+ * Given an AsyncIterable and a callback function, return an AsyncIterator
+ * which produces values mapped via calling the callback function.
+ */
+export declare function mapAsyncIterator<T, U, R = undefined>(
+  iterable: AsyncGenerator<T, R, void> | AsyncIterable<T>,
+  callback: (value: T) => PromiseOrValue<U>,
+): AsyncGenerator<U, R, void>;

graphql-subscription/node_modules/graphql/execution/mapAsyncIterator.js

@@ -0,0 +1,68 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.mapAsyncIterator = mapAsyncIterator;
+
+/**
+ * Given an AsyncIterable and a callback function, return an AsyncIterator
+ * which produces values mapped via calling the callback function.
+ */
+function mapAsyncIterator(iterable, callback) {
+  const iterator = iterable[Symbol.asyncIterator]();
+
+  async function mapResult(result) {
+    if (result.done) {
+      return result;
+    }
+
+    try {
+      return {
+        value: await callback(result.value),
+        done: false,
+      };
+    } catch (error) {
+      /* c8 ignore start */
+      // FIXME: add test case
+      if (typeof iterator.return === 'function') {
+        try {
+          await iterator.return();
+        } catch (_e) {
+          /* ignore error */
+        }
+      }
+
+      throw error;
+      /* c8 ignore stop */
+    }
+  }
+
+  return {
+    async next() {
+      return mapResult(await iterator.next());
+    },
+
+    async return() {
+      // If iterator.return() does not exist, then type R must be undefined.
+      return typeof iterator.return === 'function'
+        ? mapResult(await iterator.return())
+        : {
+            value: undefined,
+            done: true,
+          };
+    },
+
+    async throw(error) {
+      if (typeof iterator.throw === 'function') {
+        return mapResult(await iterator.throw(error));
+      }
+
+      throw error;
+    },
+
+    [Symbol.asyncIterator]() {
+      return this;
+    },
+  };
+}

graphql-subscription/node_modules/graphql/execution/mapAsyncIterator.mjs

@@ -0,0 +1,61 @@
+/**
+ * Given an AsyncIterable and a callback function, return an AsyncIterator
+ * which produces values mapped via calling the callback function.
+ */
+export function mapAsyncIterator(iterable, callback) {
+  const iterator = iterable[Symbol.asyncIterator]();
+
+  async function mapResult(result) {
+    if (result.done) {
+      return result;
+    }
+
+    try {
+      return {
+        value: await callback(result.value),
+        done: false,
+      };
+    } catch (error) {
+      /* c8 ignore start */
+      // FIXME: add test case
+      if (typeof iterator.return === 'function') {
+        try {
+          await iterator.return();
+        } catch (_e) {
+          /* ignore error */
+        }
+      }
+
+      throw error;
+      /* c8 ignore stop */
+    }
+  }
+
+  return {
+    async next() {
+      return mapResult(await iterator.next());
+    },
+
+    async return() {
+      // If iterator.return() does not exist, then type R must be undefined.
+      return typeof iterator.return === 'function'
+        ? mapResult(await iterator.return())
+        : {
+            value: undefined,
+            done: true,
+          };
+    },
+
+    async throw(error) {
+      if (typeof iterator.throw === 'function') {
+        return mapResult(await iterator.throw(error));
+      }
+
+      throw error;
+    },
+
+    [Symbol.asyncIterator]() {
+      return this;
+    },
+  };
+}

graphql-subscription/node_modules/graphql/execution/subscribe.d.ts

@@ -0,0 +1,72 @@
+import type { Maybe } from '../jsutils/Maybe';
+import type { DocumentNode } from '../language/ast';
+import type { GraphQLFieldResolver } from '../type/definition';
+import type { GraphQLSchema } from '../type/schema';
+import type { ExecutionArgs, ExecutionResult } from './execute';
+/**
+ * Implements the "Subscribe" algorithm described in the GraphQL specification.
+ *
+ * Returns a Promise which resolves to either an AsyncIterator (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 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 an AsyncIterator, which
+ * yields a stream of ExecutionResults representing the response stream.
+ *
+ * Accepts either an object with named arguments, or individual arguments.
+ */
+export declare function subscribe(
+  args: ExecutionArgs,
+): Promise<AsyncGenerator<ExecutionResult, void, void> | ExecutionResult>;
+/**
+ * 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.
+ */
+export declare function createSourceEventStream(
+  args: ExecutionArgs,
+): Promise<AsyncIterable<unknown> | ExecutionResult>;
+/** @deprecated will be removed in next major version in favor of named arguments */
+export declare function createSourceEventStream(
+  schema: GraphQLSchema,
+  document: DocumentNode,
+  rootValue?: unknown,
+  contextValue?: unknown,
+  variableValues?: Maybe<{
+    readonly [variable: string]: unknown;
+  }>,
+  operationName?: Maybe<string>,
+  subscribeFieldResolver?: Maybe<GraphQLFieldResolver<any, any>>,
+): Promise<AsyncIterable<unknown> | ExecutionResult>;

graphql-subscription/node_modules/graphql/execution/subscribe.js

@@ -0,0 +1,244 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.createSourceEventStream = createSourceEventStream;
+exports.subscribe = subscribe;
+
+var _devAssert = require('../jsutils/devAssert.js');
+
+var _inspect = require('../jsutils/inspect.js');
+
+var _isAsyncIterable = require('../jsutils/isAsyncIterable.js');
+
+var _Path = require('../jsutils/Path.js');
+
+var _GraphQLError = require('../error/GraphQLError.js');
+
+var _locatedError = require('../error/locatedError.js');
+
+var _collectFields = require('./collectFields.js');
+
+var _execute = require('./execute.js');
+
+var _mapAsyncIterator = require('./mapAsyncIterator.js');
+
+var _values = require('./values.js');
+
+/**
+ * Implements the "Subscribe" algorithm described in the GraphQL specification.
+ *
+ * Returns a Promise which resolves to either an AsyncIterator (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 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 an AsyncIterator, which
+ * yields a stream of ExecutionResults representing the response stream.
+ *
+ * Accepts either an object with named arguments, or individual arguments.
+ */
+async function subscribe(args) {
+  // Temporary for v15 to v16 migration. Remove in v17
+  arguments.length < 2 ||
+    (0, _devAssert.devAssert)(
+      false,
+      'graphql@16 dropped long-deprecated support for positional arguments, please pass an object instead.',
+    );
+  const resultOrStream = await createSourceEventStream(args);
+
+  if (!(0, _isAsyncIterable.isAsyncIterable)(resultOrStream)) {
+    return resultOrStream;
+  } // 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.
+
+  const mapSourceToResponse = (payload) =>
+    (0, _execute.execute)({ ...args, rootValue: payload }); // Map every source value to a ExecutionResult value as described above.
+
+  return (0, _mapAsyncIterator.mapAsyncIterator)(
+    resultOrStream,
+    mapSourceToResponse,
+  );
+}
+
+function toNormalizedArgs(args) {
+  const firstArg = args[0];
+
+  if (firstArg && 'document' in firstArg) {
+    return firstArg;
+  }
+
+  return {
+    schema: firstArg,
+    // FIXME: when underlying TS bug fixed, see https://github.com/microsoft/TypeScript/issues/31613
+    document: args[1],
+    rootValue: args[2],
+    contextValue: args[3],
+    variableValues: args[4],
+    operationName: args[5],
+    subscribeFieldResolver: args[6],
+  };
+}
+/**
+ * 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.
+ */
+
+async function createSourceEventStream(...rawArgs) {
+  const args = toNormalizedArgs(rawArgs);
+  const { schema, document, variableValues } = args; // 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); // If a valid execution context cannot be created due to incorrect arguments,
+  // a "Response" with only errors is returned.
+
+  const exeContext = (0, _execute.buildExecutionContext)(args); // Return early errors if execution context failed.
+
+  if (!('schema' in exeContext)) {
+    return {
+      errors: exeContext,
+    };
+  }
+
+  try {
+    const eventStream = await executeSubscription(exeContext); // Assert field returned an event stream, otherwise yield an error.
+
+    if (!(0, _isAsyncIterable.isAsyncIterable)(eventStream)) {
+      throw new Error(
+        'Subscription field must return Async Iterable. ' +
+          `Received: ${(0, _inspect.inspect)(eventStream)}.`,
+      );
+    }
+
+    return eventStream;
+  } catch (error) {
+    // If it GraphQLError, report it as an ExecutionResult, containing only errors and no data.
+    // Otherwise treat the error as a system-class error and re-throw it.
+    if (error instanceof _GraphQLError.GraphQLError) {
+      return {
+        errors: [error],
+      };
+    }
+
+    throw error;
+  }
+}
+
+async function executeSubscription(exeContext) {
+  const { schema, fragments, operation, variableValues, rootValue } =
+    exeContext;
+  const rootType = schema.getSubscriptionType();
+
+  if (rootType == null) {
+    throw new _GraphQLError.GraphQLError(
+      'Schema is not configured to execute subscription operation.',
+      {
+        nodes: operation,
+      },
+    );
+  }
+
+  const rootFields = (0, _collectFields.collectFields)(
+    schema,
+    fragments,
+    variableValues,
+    rootType,
+    operation.selectionSet,
+  );
+  const [responseName, fieldNodes] = [...rootFields.entries()][0];
+  const fieldDef = (0, _execute.getFieldDef)(schema, rootType, fieldNodes[0]);
+
+  if (!fieldDef) {
+    const fieldName = fieldNodes[0].name.value;
+    throw new _GraphQLError.GraphQLError(
+      `The subscription field "${fieldName}" is not defined.`,
+      {
+        nodes: fieldNodes,
+      },
+    );
+  }
+
+  const path = (0, _Path.addPath)(undefined, responseName, rootType.name);
+  const info = (0, _execute.buildResolveInfo)(
+    exeContext,
+    fieldDef,
+    fieldNodes,
+    rootType,
+    path,
+  );
+
+  try {
+    var _fieldDef$subscribe;
+
+    // Implements the "ResolveFieldEventStream" algorithm from GraphQL specification.
+    // It differs from "ResolveFieldValue" due to providing a different `resolveFn`.
+    // Build a JS object of arguments from the field.arguments AST, using the
+    // variables scope to fulfill any variable references.
+    const args = (0, _values.getArgumentValues)(
+      fieldDef,
+      fieldNodes[0],
+      variableValues,
+    ); // The resolve function's optional third argument is a context value that
+    // is provided to every resolve function within an execution. It is commonly
+    // used to represent an authenticated user, or request-specific caches.
+
+    const contextValue = exeContext.contextValue; // Call the `subscribe()` resolver or the default resolver to produce an
+    // AsyncIterable yielding raw payloads.
+
+    const resolveFn =
+      (_fieldDef$subscribe = fieldDef.subscribe) !== null &&
+      _fieldDef$subscribe !== void 0
+        ? _fieldDef$subscribe
+        : exeContext.subscribeFieldResolver;
+    const eventStream = await resolveFn(rootValue, args, contextValue, info);
+
+    if (eventStream instanceof Error) {
+      throw eventStream;
+    }
+
+    return eventStream;
+  } catch (error) {
+    throw (0, _locatedError.locatedError)(
+      error,
+      fieldNodes,
+      (0, _Path.pathToArray)(path),
+    );
+  }
+}

graphql-subscription/node_modules/graphql/execution/subscribe.mjs

@@ -0,0 +1,222 @@
+import { devAssert } from '../jsutils/devAssert.mjs';
+import { inspect } from '../jsutils/inspect.mjs';
+import { isAsyncIterable } from '../jsutils/isAsyncIterable.mjs';
+import { addPath, pathToArray } from '../jsutils/Path.mjs';
+import { GraphQLError } from '../error/GraphQLError.mjs';
+import { locatedError } from '../error/locatedError.mjs';
+import { collectFields } from './collectFields.mjs';
+import {
+  assertValidExecutionArguments,
+  buildExecutionContext,
+  buildResolveInfo,
+  execute,
+  getFieldDef,
+} from './execute.mjs';
+import { mapAsyncIterator } from './mapAsyncIterator.mjs';
+import { getArgumentValues } from './values.mjs';
+/**
+ * Implements the "Subscribe" algorithm described in the GraphQL specification.
+ *
+ * Returns a Promise which resolves to either an AsyncIterator (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 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 an AsyncIterator, which
+ * yields a stream of ExecutionResults representing the response stream.
+ *
+ * Accepts either an object with named arguments, or individual arguments.
+ */
+
+export async function subscribe(args) {
+  // Temporary for v15 to v16 migration. Remove in v17
+  arguments.length < 2 ||
+    devAssert(
+      false,
+      'graphql@16 dropped long-deprecated support for positional arguments, please pass an object instead.',
+    );
+  const resultOrStream = await createSourceEventStream(args);
+
+  if (!isAsyncIterable(resultOrStream)) {
+    return resultOrStream;
+  } // 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.
+
+  const mapSourceToResponse = (payload) =>
+    execute({ ...args, rootValue: payload }); // Map every source value to a ExecutionResult value as described above.
+
+  return mapAsyncIterator(resultOrStream, mapSourceToResponse);
+}
+
+function toNormalizedArgs(args) {
+  const firstArg = args[0];
+
+  if (firstArg && 'document' in firstArg) {
+    return firstArg;
+  }
+
+  return {
+    schema: firstArg,
+    // FIXME: when underlying TS bug fixed, see https://github.com/microsoft/TypeScript/issues/31613
+    document: args[1],
+    rootValue: args[2],
+    contextValue: args[3],
+    variableValues: args[4],
+    operationName: args[5],
+    subscribeFieldResolver: args[6],
+  };
+}
+/**
+ * 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.
+ */
+
+export async function createSourceEventStream(...rawArgs) {
+  const args = toNormalizedArgs(rawArgs);
+  const { schema, document, variableValues } = args; // If arguments are missing or incorrectly typed, this is an internal
+  // developer mistake which should throw an early error.
+
+  assertValidExecutionArguments(schema, document, variableValues); // If a valid execution context cannot be created due to incorrect arguments,
+  // a "Response" with only errors is returned.
+
+  const exeContext = buildExecutionContext(args); // Return early errors if execution context failed.
+
+  if (!('schema' in exeContext)) {
+    return {
+      errors: exeContext,
+    };
+  }
+
+  try {
+    const eventStream = await executeSubscription(exeContext); // Assert field returned an event stream, otherwise yield an error.
+
+    if (!isAsyncIterable(eventStream)) {
+      throw new Error(
+        'Subscription field must return Async Iterable. ' +
+          `Received: ${inspect(eventStream)}.`,
+      );
+    }
+
+    return eventStream;
+  } catch (error) {
+    // If it GraphQLError, report it as an ExecutionResult, containing only errors and no data.
+    // Otherwise treat the error as a system-class error and re-throw it.
+    if (error instanceof GraphQLError) {
+      return {
+        errors: [error],
+      };
+    }
+
+    throw error;
+  }
+}
+
+async function executeSubscription(exeContext) {
+  const { schema, fragments, operation, variableValues, rootValue } =
+    exeContext;
+  const rootType = schema.getSubscriptionType();
+
+  if (rootType == null) {
+    throw new GraphQLError(
+      'Schema is not configured to execute subscription operation.',
+      {
+        nodes: operation,
+      },
+    );
+  }
+
+  const rootFields = collectFields(
+    schema,
+    fragments,
+    variableValues,
+    rootType,
+    operation.selectionSet,
+  );
+  const [responseName, fieldNodes] = [...rootFields.entries()][0];
+  const fieldDef = getFieldDef(schema, rootType, fieldNodes[0]);
+
+  if (!fieldDef) {
+    const fieldName = fieldNodes[0].name.value;
+    throw new GraphQLError(
+      `The subscription field "${fieldName}" is not defined.`,
+      {
+        nodes: fieldNodes,
+      },
+    );
+  }
+
+  const path = addPath(undefined, responseName, rootType.name);
+  const info = buildResolveInfo(
+    exeContext,
+    fieldDef,
+    fieldNodes,
+    rootType,
+    path,
+  );
+
+  try {
+    var _fieldDef$subscribe;
+
+    // Implements the "ResolveFieldEventStream" algorithm from GraphQL specification.
+    // It differs from "ResolveFieldValue" due to providing a different `resolveFn`.
+    // Build a JS object of arguments from the field.arguments AST, using the
+    // variables scope to fulfill any variable references.
+    const args = getArgumentValues(fieldDef, fieldNodes[0], variableValues); // The resolve function's optional third argument is a context value that
+    // is provided to every resolve function within an execution. It is commonly
+    // used to represent an authenticated user, or request-specific caches.
+
+    const contextValue = exeContext.contextValue; // Call the `subscribe()` resolver or the default resolver to produce an
+    // AsyncIterable yielding raw payloads.
+
+    const resolveFn =
+      (_fieldDef$subscribe = fieldDef.subscribe) !== null &&
+      _fieldDef$subscribe !== void 0
+        ? _fieldDef$subscribe
+        : exeContext.subscribeFieldResolver;
+    const eventStream = await resolveFn(rootValue, args, contextValue, info);
+
+    if (eventStream instanceof Error) {
+      throw eventStream;
+    }
+
+    return eventStream;
+  } catch (error) {
+    throw locatedError(error, fieldNodes, pathToArray(path));
+  }
+}

graphql-subscription/node_modules/graphql/execution/values.d.ts

@@ -0,0 +1,79 @@
+import type { Maybe } from '../jsutils/Maybe';
+import type { ObjMap } from '../jsutils/ObjMap';
+import { GraphQLError } from '../error/GraphQLError';
+import type {
+  DirectiveNode,
+  FieldNode,
+  VariableDefinitionNode,
+} from '../language/ast';
+import type { GraphQLField } from '../type/definition';
+import type { GraphQLDirective } from '../type/directives';
+import type { GraphQLSchema } from '../type/schema';
+declare type CoercedVariableValues =
+  | {
+      errors: ReadonlyArray<GraphQLError>;
+      coerced?: never;
+    }
+  | {
+      coerced: {
+        [variable: string]: unknown;
+      };
+      errors?: never;
+    };
+/**
+ * Prepares an object map of variableValues of the correct type based on the
+ * provided variable definitions and arbitrary input. If the input cannot be
+ * parsed to match the variable definitions, a GraphQLError will be thrown.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+export declare function getVariableValues(
+  schema: GraphQLSchema,
+  varDefNodes: ReadonlyArray<VariableDefinitionNode>,
+  inputs: {
+    readonly [variable: string]: unknown;
+  },
+  options?: {
+    maxErrors?: number;
+  },
+): CoercedVariableValues;
+/**
+ * Prepares an object map of argument values given a list of argument
+ * definitions and list of argument AST nodes.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+export declare function getArgumentValues(
+  def: GraphQLField<unknown, unknown> | GraphQLDirective,
+  node: FieldNode | DirectiveNode,
+  variableValues?: Maybe<ObjMap<unknown>>,
+): {
+  [argument: string]: unknown;
+};
+/**
+ * Prepares an object map of argument values given a directive definition
+ * and a AST node which may contain directives. Optionally also accepts a map
+ * of variable values.
+ *
+ * If the directive does not exist on the node, returns undefined.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+export declare function getDirectiveValues(
+  directiveDef: GraphQLDirective,
+  node: {
+    readonly directives?: ReadonlyArray<DirectiveNode>;
+  },
+  variableValues?: Maybe<ObjMap<unknown>>,
+):
+  | undefined
+  | {
+      [argument: string]: unknown;
+    };
+export {};

graphql-subscription/node_modules/graphql/execution/values.js

@@ -0,0 +1,300 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.getArgumentValues = getArgumentValues;
+exports.getDirectiveValues = getDirectiveValues;
+exports.getVariableValues = getVariableValues;
+
+var _inspect = require('../jsutils/inspect.js');
+
+var _keyMap = require('../jsutils/keyMap.js');
+
+var _printPathArray = require('../jsutils/printPathArray.js');
+
+var _GraphQLError = require('../error/GraphQLError.js');
+
+var _kinds = require('../language/kinds.js');
+
+var _printer = require('../language/printer.js');
+
+var _definition = require('../type/definition.js');
+
+var _coerceInputValue = require('../utilities/coerceInputValue.js');
+
+var _typeFromAST = require('../utilities/typeFromAST.js');
+
+var _valueFromAST = require('../utilities/valueFromAST.js');
+
+/**
+ * Prepares an object map of variableValues of the correct type based on the
+ * provided variable definitions and arbitrary input. If the input cannot be
+ * parsed to match the variable definitions, a GraphQLError will be thrown.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+function getVariableValues(schema, varDefNodes, inputs, options) {
+  const errors = [];
+  const maxErrors =
+    options === null || options === void 0 ? void 0 : options.maxErrors;
+
+  try {
+    const coerced = coerceVariableValues(
+      schema,
+      varDefNodes,
+      inputs,
+      (error) => {
+        if (maxErrors != null && errors.length >= maxErrors) {
+          throw new _GraphQLError.GraphQLError(
+            'Too many errors processing variables, error limit reached. Execution aborted.',
+          );
+        }
+
+        errors.push(error);
+      },
+    );
+
+    if (errors.length === 0) {
+      return {
+        coerced,
+      };
+    }
+  } catch (error) {
+    errors.push(error);
+  }
+
+  return {
+    errors,
+  };
+}
+
+function coerceVariableValues(schema, varDefNodes, inputs, onError) {
+  const coercedValues = {};
+
+  for (const varDefNode of varDefNodes) {
+    const varName = varDefNode.variable.name.value;
+    const varType = (0, _typeFromAST.typeFromAST)(schema, varDefNode.type);
+
+    if (!(0, _definition.isInputType)(varType)) {
+      // Must use input types for variables. This should be caught during
+      // validation, however is checked again here for safety.
+      const varTypeStr = (0, _printer.print)(varDefNode.type);
+      onError(
+        new _GraphQLError.GraphQLError(
+          `Variable "$${varName}" expected value of type "${varTypeStr}" which cannot be used as an input type.`,
+          {
+            nodes: varDefNode.type,
+          },
+        ),
+      );
+      continue;
+    }
+
+    if (!hasOwnProperty(inputs, varName)) {
+      if (varDefNode.defaultValue) {
+        coercedValues[varName] = (0, _valueFromAST.valueFromAST)(
+          varDefNode.defaultValue,
+          varType,
+        );
+      } else if ((0, _definition.isNonNullType)(varType)) {
+        const varTypeStr = (0, _inspect.inspect)(varType);
+        onError(
+          new _GraphQLError.GraphQLError(
+            `Variable "$${varName}" of required type "${varTypeStr}" was not provided.`,
+            {
+              nodes: varDefNode,
+            },
+          ),
+        );
+      }
+
+      continue;
+    }
+
+    const value = inputs[varName];
+
+    if (value === null && (0, _definition.isNonNullType)(varType)) {
+      const varTypeStr = (0, _inspect.inspect)(varType);
+      onError(
+        new _GraphQLError.GraphQLError(
+          `Variable "$${varName}" of non-null type "${varTypeStr}" must not be null.`,
+          {
+            nodes: varDefNode,
+          },
+        ),
+      );
+      continue;
+    }
+
+    coercedValues[varName] = (0, _coerceInputValue.coerceInputValue)(
+      value,
+      varType,
+      (path, invalidValue, error) => {
+        let prefix =
+          `Variable "$${varName}" got invalid value ` +
+          (0, _inspect.inspect)(invalidValue);
+
+        if (path.length > 0) {
+          prefix += ` at "${varName}${(0, _printPathArray.printPathArray)(
+            path,
+          )}"`;
+        }
+
+        onError(
+          new _GraphQLError.GraphQLError(prefix + '; ' + error.message, {
+            nodes: varDefNode,
+            originalError: error,
+          }),
+        );
+      },
+    );
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a list of argument
+ * definitions and list of argument AST nodes.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+function getArgumentValues(def, node, variableValues) {
+  var _node$arguments;
+
+  const coercedValues = {}; // FIXME: https://github.com/graphql/graphql-js/issues/2203
+
+  /* c8 ignore next */
+
+  const argumentNodes =
+    (_node$arguments = node.arguments) !== null && _node$arguments !== void 0
+      ? _node$arguments
+      : [];
+  const argNodeMap = (0, _keyMap.keyMap)(
+    argumentNodes,
+    (arg) => arg.name.value,
+  );
+
+  for (const argDef of def.args) {
+    const name = argDef.name;
+    const argType = argDef.type;
+    const argumentNode = argNodeMap[name];
+
+    if (!argumentNode) {
+      if (argDef.defaultValue !== undefined) {
+        coercedValues[name] = argDef.defaultValue;
+      } else if ((0, _definition.isNonNullType)(argType)) {
+        throw new _GraphQLError.GraphQLError(
+          `Argument "${name}" of required type "${(0, _inspect.inspect)(
+            argType,
+          )}" ` + 'was not provided.',
+          {
+            nodes: node,
+          },
+        );
+      }
+
+      continue;
+    }
+
+    const valueNode = argumentNode.value;
+    let isNull = valueNode.kind === _kinds.Kind.NULL;
+
+    if (valueNode.kind === _kinds.Kind.VARIABLE) {
+      const variableName = valueNode.name.value;
+
+      if (
+        variableValues == null ||
+        !hasOwnProperty(variableValues, variableName)
+      ) {
+        if (argDef.defaultValue !== undefined) {
+          coercedValues[name] = argDef.defaultValue;
+        } else if ((0, _definition.isNonNullType)(argType)) {
+          throw new _GraphQLError.GraphQLError(
+            `Argument "${name}" of required type "${(0, _inspect.inspect)(
+              argType,
+            )}" ` +
+              `was provided the variable "$${variableName}" which was not provided a runtime value.`,
+            {
+              nodes: valueNode,
+            },
+          );
+        }
+
+        continue;
+      }
+
+      isNull = variableValues[variableName] == null;
+    }
+
+    if (isNull && (0, _definition.isNonNullType)(argType)) {
+      throw new _GraphQLError.GraphQLError(
+        `Argument "${name}" of non-null type "${(0, _inspect.inspect)(
+          argType,
+        )}" ` + 'must not be null.',
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    const coercedValue = (0, _valueFromAST.valueFromAST)(
+      valueNode,
+      argType,
+      variableValues,
+    );
+
+    if (coercedValue === undefined) {
+      // Note: ValuesOfCorrectTypeRule validation should catch this before
+      // execution. This is a runtime check to ensure execution does not
+      // continue with an invalid argument value.
+      throw new _GraphQLError.GraphQLError(
+        `Argument "${name}" has invalid value ${(0, _printer.print)(
+          valueNode,
+        )}.`,
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    coercedValues[name] = coercedValue;
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a directive definition
+ * and a AST node which may contain directives. Optionally also accepts a map
+ * of variable values.
+ *
+ * If the directive does not exist on the node, returns undefined.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+function getDirectiveValues(directiveDef, node, variableValues) {
+  var _node$directives;
+
+  const directiveNode =
+    (_node$directives = node.directives) === null || _node$directives === void 0
+      ? void 0
+      : _node$directives.find(
+          (directive) => directive.name.value === directiveDef.name,
+        );
+
+  if (directiveNode) {
+    return getArgumentValues(directiveDef, directiveNode, variableValues);
+  }
+}
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}

graphql-subscription/node_modules/graphql/execution/values.mjs

@@ -0,0 +1,263 @@
+import { inspect } from '../jsutils/inspect.mjs';
+import { keyMap } from '../jsutils/keyMap.mjs';
+import { printPathArray } from '../jsutils/printPathArray.mjs';
+import { GraphQLError } from '../error/GraphQLError.mjs';
+import { Kind } from '../language/kinds.mjs';
+import { print } from '../language/printer.mjs';
+import { isInputType, isNonNullType } from '../type/definition.mjs';
+import { coerceInputValue } from '../utilities/coerceInputValue.mjs';
+import { typeFromAST } from '../utilities/typeFromAST.mjs';
+import { valueFromAST } from '../utilities/valueFromAST.mjs';
+
+/**
+ * Prepares an object map of variableValues of the correct type based on the
+ * provided variable definitions and arbitrary input. If the input cannot be
+ * parsed to match the variable definitions, a GraphQLError will be thrown.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+export function getVariableValues(schema, varDefNodes, inputs, options) {
+  const errors = [];
+  const maxErrors =
+    options === null || options === void 0 ? void 0 : options.maxErrors;
+
+  try {
+    const coerced = coerceVariableValues(
+      schema,
+      varDefNodes,
+      inputs,
+      (error) => {
+        if (maxErrors != null && errors.length >= maxErrors) {
+          throw new GraphQLError(
+            'Too many errors processing variables, error limit reached. Execution aborted.',
+          );
+        }
+
+        errors.push(error);
+      },
+    );
+
+    if (errors.length === 0) {
+      return {
+        coerced,
+      };
+    }
+  } catch (error) {
+    errors.push(error);
+  }
+
+  return {
+    errors,
+  };
+}
+
+function coerceVariableValues(schema, varDefNodes, inputs, onError) {
+  const coercedValues = {};
+
+  for (const varDefNode of varDefNodes) {
+    const varName = varDefNode.variable.name.value;
+    const varType = typeFromAST(schema, varDefNode.type);
+
+    if (!isInputType(varType)) {
+      // Must use input types for variables. This should be caught during
+      // validation, however is checked again here for safety.
+      const varTypeStr = print(varDefNode.type);
+      onError(
+        new GraphQLError(
+          `Variable "$${varName}" expected value of type "${varTypeStr}" which cannot be used as an input type.`,
+          {
+            nodes: varDefNode.type,
+          },
+        ),
+      );
+      continue;
+    }
+
+    if (!hasOwnProperty(inputs, varName)) {
+      if (varDefNode.defaultValue) {
+        coercedValues[varName] = valueFromAST(varDefNode.defaultValue, varType);
+      } else if (isNonNullType(varType)) {
+        const varTypeStr = inspect(varType);
+        onError(
+          new GraphQLError(
+            `Variable "$${varName}" of required type "${varTypeStr}" was not provided.`,
+            {
+              nodes: varDefNode,
+            },
+          ),
+        );
+      }
+
+      continue;
+    }
+
+    const value = inputs[varName];
+
+    if (value === null && isNonNullType(varType)) {
+      const varTypeStr = inspect(varType);
+      onError(
+        new GraphQLError(
+          `Variable "$${varName}" of non-null type "${varTypeStr}" must not be null.`,
+          {
+            nodes: varDefNode,
+          },
+        ),
+      );
+      continue;
+    }
+
+    coercedValues[varName] = coerceInputValue(
+      value,
+      varType,
+      (path, invalidValue, error) => {
+        let prefix =
+          `Variable "$${varName}" got invalid value ` + inspect(invalidValue);
+
+        if (path.length > 0) {
+          prefix += ` at "${varName}${printPathArray(path)}"`;
+        }
+
+        onError(
+          new GraphQLError(prefix + '; ' + error.message, {
+            nodes: varDefNode,
+            originalError: error,
+          }),
+        );
+      },
+    );
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a list of argument
+ * definitions and list of argument AST nodes.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+export function getArgumentValues(def, node, variableValues) {
+  var _node$arguments;
+
+  const coercedValues = {}; // FIXME: https://github.com/graphql/graphql-js/issues/2203
+
+  /* c8 ignore next */
+
+  const argumentNodes =
+    (_node$arguments = node.arguments) !== null && _node$arguments !== void 0
+      ? _node$arguments
+      : [];
+  const argNodeMap = keyMap(argumentNodes, (arg) => arg.name.value);
+
+  for (const argDef of def.args) {
+    const name = argDef.name;
+    const argType = argDef.type;
+    const argumentNode = argNodeMap[name];
+
+    if (!argumentNode) {
+      if (argDef.defaultValue !== undefined) {
+        coercedValues[name] = argDef.defaultValue;
+      } else if (isNonNullType(argType)) {
+        throw new GraphQLError(
+          `Argument "${name}" of required type "${inspect(argType)}" ` +
+            'was not provided.',
+          {
+            nodes: node,
+          },
+        );
+      }
+
+      continue;
+    }
+
+    const valueNode = argumentNode.value;
+    let isNull = valueNode.kind === Kind.NULL;
+
+    if (valueNode.kind === Kind.VARIABLE) {
+      const variableName = valueNode.name.value;
+
+      if (
+        variableValues == null ||
+        !hasOwnProperty(variableValues, variableName)
+      ) {
+        if (argDef.defaultValue !== undefined) {
+          coercedValues[name] = argDef.defaultValue;
+        } else if (isNonNullType(argType)) {
+          throw new GraphQLError(
+            `Argument "${name}" of required type "${inspect(argType)}" ` +
+              `was provided the variable "$${variableName}" which was not provided a runtime value.`,
+            {
+              nodes: valueNode,
+            },
+          );
+        }
+
+        continue;
+      }
+
+      isNull = variableValues[variableName] == null;
+    }
+
+    if (isNull && isNonNullType(argType)) {
+      throw new GraphQLError(
+        `Argument "${name}" of non-null type "${inspect(argType)}" ` +
+          'must not be null.',
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    const coercedValue = valueFromAST(valueNode, argType, variableValues);
+
+    if (coercedValue === undefined) {
+      // Note: ValuesOfCorrectTypeRule validation should catch this before
+      // execution. This is a runtime check to ensure execution does not
+      // continue with an invalid argument value.
+      throw new GraphQLError(
+        `Argument "${name}" has invalid value ${print(valueNode)}.`,
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    coercedValues[name] = coercedValue;
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a directive definition
+ * and a AST node which may contain directives. Optionally also accepts a map
+ * of variable values.
+ *
+ * If the directive does not exist on the node, returns undefined.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+export function getDirectiveValues(directiveDef, node, variableValues) {
+  var _node$directives;
+
+  const directiveNode =
+    (_node$directives = node.directives) === null || _node$directives === void 0
+      ? void 0
+      : _node$directives.find(
+          (directive) => directive.name.value === directiveDef.name,
+        );
+
+  if (directiveNode) {
+    return getArgumentValues(directiveDef, directiveNode, variableValues);
+  }
+}
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}