graphql/utilities/coerceInputValue.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.coerceInputValue = coerceInputValue;

var _objectValues3 = _interopRequireDefault(require("../polyfills/objectValues.js"));

var _inspect = _interopRequireDefault(require("../jsutils/inspect.js"));

var _invariant = _interopRequireDefault(require("../jsutils/invariant.js"));

var _didYouMean = _interopRequireDefault(require("../jsutils/didYouMean.js"));

var _isObjectLike = _interopRequireDefault(require("../jsutils/isObjectLike.js"));

var _safeArrayFrom = _interopRequireDefault(require("../jsutils/safeArrayFrom.js"));

var _suggestionList = _interopRequireDefault(require("../jsutils/suggestionList.js"));

var _printPathArray = _interopRequireDefault(require("../jsutils/printPathArray.js"));

var _Path = require("../jsutils/Path.js");

var _GraphQLError = require("../error/GraphQLError.js");

var _definition = require("../type/definition.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Coerces a JavaScript value given a GraphQL Input Type.
 */
function coerceInputValue(inputValue, type) {
  var onError = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : defaultOnError;
  return coerceInputValueImpl(inputValue, type, onError);
}

function defaultOnError(path, invalidValue, error) {
  var errorPrefix = 'Invalid value ' + (0, _inspect.default)(invalidValue);

  if (path.length > 0) {
    errorPrefix += " at \"value".concat((0, _printPathArray.default)(path), "\"");
  }

  error.message = errorPrefix + ': ' + error.message;
  throw error;
}

function coerceInputValueImpl(inputValue, type, onError, path) {
  if ((0, _definition.isNonNullType)(type)) {
    if (inputValue != null) {
      return coerceInputValueImpl(inputValue, type.ofType, onError, path);
    }

    onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Expected non-nullable type \"".concat((0, _inspect.default)(type), "\" not to be null.")));
    return;
  }

  if (inputValue == null) {
    // Explicitly return the value null.
    return null;
  }

  if ((0, _definition.isListType)(type)) {
    var itemType = type.ofType;
    var coercedList = (0, _safeArrayFrom.default)(inputValue, function (itemValue, index) {
      var itemPath = (0, _Path.addPath)(path, index, undefined);
      return coerceInputValueImpl(itemValue, itemType, onError, itemPath);
    });

    if (coercedList != null) {
      return coercedList;
    } // Lists accept a non-list value as a list of one.


    return [coerceInputValueImpl(inputValue, itemType, onError, path)];
  }

  if ((0, _definition.isInputObjectType)(type)) {
    if (!(0, _isObjectLike.default)(inputValue)) {
      onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Expected type \"".concat(type.name, "\" to be an object.")));
      return;
    }

    var coercedValue = {};
    var fieldDefs = type.getFields();

    for (var _i2 = 0, _objectValues2 = (0, _objectValues3.default)(fieldDefs); _i2 < _objectValues2.length; _i2++) {
      var field = _objectValues2[_i2];
      var fieldValue = inputValue[field.name];

      if (fieldValue === undefined) {
        if (field.defaultValue !== undefined) {
          coercedValue[field.name] = field.defaultValue;
        } else if ((0, _definition.isNonNullType)(field.type)) {
          var typeStr = (0, _inspect.default)(field.type);
          onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Field \"".concat(field.name, "\" of required type \"").concat(typeStr, "\" was not provided.")));
        }

        continue;
      }

      coercedValue[field.name] = coerceInputValueImpl(fieldValue, field.type, onError, (0, _Path.addPath)(path, field.name, type.name));
    } // Ensure every provided field is defined.


    for (var _i4 = 0, _Object$keys2 = Object.keys(inputValue); _i4 < _Object$keys2.length; _i4++) {
      var fieldName = _Object$keys2[_i4];

      if (!fieldDefs[fieldName]) {
        var suggestions = (0, _suggestionList.default)(fieldName, Object.keys(type.getFields()));
        onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Field \"".concat(fieldName, "\" is not defined by type \"").concat(type.name, "\".") + (0, _didYouMean.default)(suggestions)));
      }
    }

    return coercedValue;
  } // istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2618')


  if ((0, _definition.isLeafType)(type)) {
    var parseResult; // Scalars and Enums determine if a input value is valid via parseValue(),
    // which can throw to indicate failure. If it throws, maintain a reference
    // to the original error.

    try {
      parseResult = type.parseValue(inputValue);
    } catch (error) {
      if (error instanceof _GraphQLError.GraphQLError) {
        onError((0, _Path.pathToArray)(path), inputValue, error);
      } else {
        onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Expected type \"".concat(type.name, "\". ") + error.message, undefined, undefined, undefined, undefined, error));
      }

      return;
    }

    if (parseResult === undefined) {
      onError((0, _Path.pathToArray)(path), inputValue, new _GraphQLError.GraphQLError("Expected type \"".concat(type.name, "\".")));
    }

    return parseResult;
  } // istanbul ignore next (Not reachable. All possible input types have been considered)


  false || (0, _invariant.default)(0, 'Unexpected input type: ' + (0, _inspect.default)(type));
}