143 lines
4.9 KiB
JavaScript
143 lines
4.9 KiB
JavaScript
import { forEach, isCollection } from 'iterall';
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import objectValues from '../polyfills/objectValues';
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import inspect from '../jsutils/inspect';
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import invariant from '../jsutils/invariant';
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import didYouMean from '../jsutils/didYouMean';
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import isObjectLike from '../jsutils/isObjectLike';
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import suggestionList from '../jsutils/suggestionList';
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import printPathArray from '../jsutils/printPathArray';
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import { addPath, pathToArray } from '../jsutils/Path';
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import { GraphQLError } from '../error/GraphQLError';
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import { isScalarType, isEnumType, isInputObjectType, isListType, isNonNullType } from '../type/definition';
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/**
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* Coerces a JavaScript value given a GraphQL Input Type.
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*/
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export function coerceInputValue(inputValue, type) {
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var onError = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : defaultOnError;
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return coerceInputValueImpl(inputValue, type, onError);
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}
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function defaultOnError(path, invalidValue, error) {
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var errorPrefix = 'Invalid value ' + inspect(invalidValue);
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if (path.length > 0) {
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errorPrefix += " at \"value".concat(printPathArray(path), "\": ");
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}
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error.message = errorPrefix + ': ' + error.message;
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throw error;
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}
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function coerceInputValueImpl(inputValue, type, onError, path) {
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if (isNonNullType(type)) {
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if (inputValue != null) {
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return coerceInputValueImpl(inputValue, type.ofType, onError, path);
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}
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onError(pathToArray(path), inputValue, new GraphQLError("Expected non-nullable type ".concat(inspect(type), " not to be null.")));
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return;
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}
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if (inputValue == null) {
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// Explicitly return the value null.
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return null;
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}
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if (isListType(type)) {
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var itemType = type.ofType;
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if (isCollection(inputValue)) {
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var coercedValue = [];
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forEach(inputValue, function (itemValue, index) {
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coercedValue.push(coerceInputValueImpl(itemValue, itemType, onError, addPath(path, index)));
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});
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return coercedValue;
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} // Lists accept a non-list value as a list of one.
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return [coerceInputValueImpl(inputValue, itemType, onError, path)];
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}
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if (isInputObjectType(type)) {
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if (!isObjectLike(inputValue)) {
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onError(pathToArray(path), inputValue, new GraphQLError("Expected type ".concat(type.name, " to be an object.")));
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return;
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}
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var _coercedValue = {};
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var fieldDefs = type.getFields();
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for (var _i2 = 0, _objectValues2 = objectValues(fieldDefs); _i2 < _objectValues2.length; _i2++) {
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var field = _objectValues2[_i2];
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var fieldValue = inputValue[field.name];
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if (fieldValue === undefined) {
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if (field.defaultValue !== undefined) {
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_coercedValue[field.name] = field.defaultValue;
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} else if (isNonNullType(field.type)) {
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var typeStr = inspect(field.type);
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onError(pathToArray(path), inputValue, new GraphQLError("Field ".concat(field.name, " of required type ").concat(typeStr, " was not provided.")));
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}
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continue;
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}
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_coercedValue[field.name] = coerceInputValueImpl(fieldValue, field.type, onError, addPath(path, field.name));
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} // Ensure every provided field is defined.
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for (var _i4 = 0, _Object$keys2 = Object.keys(inputValue); _i4 < _Object$keys2.length; _i4++) {
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var fieldName = _Object$keys2[_i4];
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if (!fieldDefs[fieldName]) {
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var suggestions = suggestionList(fieldName, Object.keys(type.getFields()));
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onError(pathToArray(path), inputValue, new GraphQLError("Field \"".concat(fieldName, "\" is not defined by type ").concat(type.name, ".") + didYouMean(suggestions)));
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}
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}
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return _coercedValue;
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}
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if (isScalarType(type)) {
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var parseResult; // Scalars determine if a input value is valid via parseValue(), which can
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// throw to indicate failure. If it throws, maintain a reference to
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// the original error.
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try {
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parseResult = type.parseValue(inputValue);
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} catch (error) {
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onError(pathToArray(path), inputValue, new GraphQLError("Expected type ".concat(type.name, ". ") + error.message, undefined, undefined, undefined, undefined, error));
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return;
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}
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if (parseResult === undefined) {
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onError(pathToArray(path), inputValue, new GraphQLError("Expected type ".concat(type.name, ".")));
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}
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return parseResult;
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}
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/* istanbul ignore else */
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if (isEnumType(type)) {
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if (typeof inputValue === 'string') {
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var enumValue = type.getValue(inputValue);
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if (enumValue) {
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return enumValue.value;
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}
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}
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var _suggestions = suggestionList(String(inputValue), type.getValues().map(function (enumValue) {
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return enumValue.name;
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}));
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onError(pathToArray(path), inputValue, new GraphQLError("Expected type ".concat(type.name, ".") + didYouMean(_suggestions)));
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return;
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} // Not reachable. All possible input types have been considered.
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/* istanbul ignore next */
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invariant(false, 'Unexpected input type: ' + inspect(type));
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}
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