graphql/type/schema.mjs

A Query Language and Runtime which can target any service.

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *  strict
 */
import { isAbstractType, isObjectType, isInterfaceType, isUnionType, isInputObjectType, isWrappingType } from './definition';
import { GraphQLDirective, isDirective, specifiedDirectives } from './directives';
import inspect from '../jsutils/inspect';
import { __Schema } from './introspection';
import defineToStringTag from '../jsutils/defineToStringTag';
import find from '../jsutils/find';
import instanceOf from '../jsutils/instanceOf';
import invariant from '../jsutils/invariant';
import objectValues from '../jsutils/objectValues';
// eslint-disable-next-line no-redeclare
export function isSchema(schema) {
  return instanceOf(schema, GraphQLSchema);
}
/**
 * Schema Definition
 *
 * A Schema is created by supplying the root types of each type of operation,
 * query and mutation (optional). A schema definition is then supplied to the
 * validator and executor.
 *
 * Example:
 *
 *     const MyAppSchema = new GraphQLSchema({
 *       query: MyAppQueryRootType,
 *       mutation: MyAppMutationRootType,
 *     })
 *
 * Note: If an array of `directives` are provided to GraphQLSchema, that will be
 * the exact list of directives represented and allowed. If `directives` is not
 * provided then a default set of the specified directives (e.g. @include and
 * @skip) will be used. If you wish to provide *additional* directives to these
 * specified directives, you must explicitly declare them. Example:
 *
 *     const MyAppSchema = new GraphQLSchema({
 *       ...
 *       directives: specifiedDirectives.concat([ myCustomDirective ]),
 *     })
 *
 */

export var GraphQLSchema =
/*#__PURE__*/
function () {
  // Used as a cache for validateSchema().
  // Referenced by validateSchema().
  function GraphQLSchema(config) {
    _defineProperty(this, "astNode", void 0);

    _defineProperty(this, "extensionASTNodes", void 0);

    _defineProperty(this, "_queryType", void 0);

    _defineProperty(this, "_mutationType", void 0);

    _defineProperty(this, "_subscriptionType", void 0);

    _defineProperty(this, "_directives", void 0);

    _defineProperty(this, "_typeMap", void 0);

    _defineProperty(this, "_implementations", void 0);

    _defineProperty(this, "_possibleTypeMap", void 0);

    _defineProperty(this, "__validationErrors", void 0);

    _defineProperty(this, "__allowedLegacyNames", void 0);

    // If this schema was built from a source known to be valid, then it may be
    // marked with assumeValid to avoid an additional type system validation.
    if (config && config.assumeValid) {
      this.__validationErrors = [];
    } else {
      // Otherwise check for common mistakes during construction to produce
      // clear and early error messages.
      !(_typeof(config) === 'object') ? invariant(0, 'Must provide configuration object.') : void 0;
      !(!config.types || Array.isArray(config.types)) ? invariant(0, "\"types\" must be Array if provided but got: ".concat(inspect(config.types), ".")) : void 0;
      !(!config.directives || Array.isArray(config.directives)) ? invariant(0, '"directives" must be Array if provided but got: ' + "".concat(inspect(config.directives), ".")) : void 0;
      !(!config.allowedLegacyNames || Array.isArray(config.allowedLegacyNames)) ? invariant(0, '"allowedLegacyNames" must be Array if provided but got: ' + "".concat(inspect(config.allowedLegacyNames), ".")) : void 0;
    }

    this.__allowedLegacyNames = config.allowedLegacyNames || [];
    this._queryType = config.query;
    this._mutationType = config.mutation;
    this._subscriptionType = config.subscription; // Provide specified directives (e.g. @include and @skip) by default.

    this._directives = config.directives || specifiedDirectives;
    this.astNode = config.astNode;
    this.extensionASTNodes = config.extensionASTNodes; // Build type map now to detect any errors within this schema.

    var initialTypes = [this.getQueryType(), this.getMutationType(), this.getSubscriptionType(), __Schema];
    var types = config.types;

    if (types) {
      initialTypes = initialTypes.concat(types);
    } // Keep track of all types referenced within the schema.


    var typeMap = Object.create(null); // First by deeply visiting all initial types.

    typeMap = initialTypes.reduce(typeMapReducer, typeMap); // Then by deeply visiting all directive types.

    typeMap = this._directives.reduce(typeMapDirectiveReducer, typeMap); // Storing the resulting map for reference by the schema.

    this._typeMap = typeMap; // Keep track of all implementations by interface name.

    this._implementations = Object.create(null);

    var _arr = Object.keys(this._typeMap);

    for (var _i = 0; _i < _arr.length; _i++) {
      var typeName = _arr[_i];
      var type = this._typeMap[typeName];

      if (isObjectType(type)) {
        var _iteratorNormalCompletion = true;
        var _didIteratorError = false;
        var _iteratorError = undefined;

        try {
          for (var _iterator = type.getInterfaces()[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
            var iface = _step.value;

            if (isInterfaceType(iface)) {
              var impls = this._implementations[iface.name];

              if (impls) {
                impls.push(type);
              } else {
                this._implementations[iface.name] = [type];
              }
            }
          }
        } catch (err) {
          _didIteratorError = true;
          _iteratorError = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion && _iterator.return != null) {
              _iterator.return();
            }
          } finally {
            if (_didIteratorError) {
              throw _iteratorError;
            }
          }
        }
      } else if (isAbstractType(type) && !this._implementations[type.name]) {
        this._implementations[type.name] = [];
      }
    }
  }

  var _proto = GraphQLSchema.prototype;

  _proto.getQueryType = function getQueryType() {
    return this._queryType;
  };

  _proto.getMutationType = function getMutationType() {
    return this._mutationType;
  };

  _proto.getSubscriptionType = function getSubscriptionType() {
    return this._subscriptionType;
  };

  _proto.getTypeMap = function getTypeMap() {
    return this._typeMap;
  };

  _proto.getType = function getType(name) {
    return this.getTypeMap()[name];
  };

  _proto.getPossibleTypes = function getPossibleTypes(abstractType) {
    if (isUnionType(abstractType)) {
      return abstractType.getTypes();
    }

    return this._implementations[abstractType.name];
  };

  _proto.isPossibleType = function isPossibleType(abstractType, possibleType) {
    var possibleTypeMap = this._possibleTypeMap;

    if (!possibleTypeMap) {
      this._possibleTypeMap = possibleTypeMap = Object.create(null);
    }

    if (!possibleTypeMap[abstractType.name]) {
      var possibleTypes = this.getPossibleTypes(abstractType);
      possibleTypeMap[abstractType.name] = possibleTypes.reduce(function (map, type) {
        return map[type.name] = true, map;
      }, Object.create(null));
    }

    return Boolean(possibleTypeMap[abstractType.name][possibleType.name]);
  };

  _proto.getDirectives = function getDirectives() {
    return this._directives;
  };

  _proto.getDirective = function getDirective(name) {
    return find(this.getDirectives(), function (directive) {
      return directive.name === name;
    });
  };

  return GraphQLSchema;
}(); // Conditionally apply `[Symbol.toStringTag]` if `Symbol`s are supported

defineToStringTag(GraphQLSchema);

function typeMapReducer(map, type) {
  if (!type) {
    return map;
  }

  if (isWrappingType(type)) {
    return typeMapReducer(map, type.ofType);
  }

  if (map[type.name]) {
    !(map[type.name] === type) ? invariant(0, 'Schema must contain unique named types but contains multiple ' + "types named \"".concat(type.name, "\".")) : void 0;
    return map;
  }

  map[type.name] = type;
  var reducedMap = map;

  if (isUnionType(type)) {
    reducedMap = type.getTypes().reduce(typeMapReducer, reducedMap);
  }

  if (isObjectType(type)) {
    reducedMap = type.getInterfaces().reduce(typeMapReducer, reducedMap);
  }

  if (isObjectType(type) || isInterfaceType(type)) {
    var _iteratorNormalCompletion2 = true;
    var _didIteratorError2 = false;
    var _iteratorError2 = undefined;

    try {
      for (var _iterator2 = objectValues(type.getFields())[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
        var field = _step2.value;

        if (field.args) {
          var fieldArgTypes = field.args.map(function (arg) {
            return arg.type;
          });
          reducedMap = fieldArgTypes.reduce(typeMapReducer, reducedMap);
        }

        reducedMap = typeMapReducer(reducedMap, field.type);
      }
    } catch (err) {
      _didIteratorError2 = true;
      _iteratorError2 = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion2 && _iterator2.return != null) {
          _iterator2.return();
        }
      } finally {
        if (_didIteratorError2) {
          throw _iteratorError2;
        }
      }
    }
  }

  if (isInputObjectType(type)) {
    var _iteratorNormalCompletion3 = true;
    var _didIteratorError3 = false;
    var _iteratorError3 = undefined;

    try {
      for (var _iterator3 = objectValues(type.getFields())[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
        var _field = _step3.value;
        reducedMap = typeMapReducer(reducedMap, _field.type);
      }
    } catch (err) {
      _didIteratorError3 = true;
      _iteratorError3 = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion3 && _iterator3.return != null) {
          _iterator3.return();
        }
      } finally {
        if (_didIteratorError3) {
          throw _iteratorError3;
        }
      }
    }
  }

  return reducedMap;
}

function typeMapDirectiveReducer(map, directive) {
  // Directives are not validated until validateSchema() is called.
  if (!isDirective(directive)) {
    return map;
  }

  return directive.args.reduce(function (_map, arg) {
    return typeMapReducer(_map, arg.type);
  }, map);
}