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167 lines
4.6 KiB
167 lines
4.6 KiB
import { didYouMean } from '../jsutils/didYouMean.mjs'; |
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import { inspect } from '../jsutils/inspect.mjs'; |
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import { invariant } from '../jsutils/invariant.mjs'; |
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import { isIterableObject } from '../jsutils/isIterableObject.mjs'; |
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import { isObjectLike } from '../jsutils/isObjectLike.mjs'; |
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import { addPath, pathToArray } from '../jsutils/Path.mjs'; |
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import { printPathArray } from '../jsutils/printPathArray.mjs'; |
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import { suggestionList } from '../jsutils/suggestionList.mjs'; |
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import { GraphQLError } from '../error/GraphQLError.mjs'; |
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import { |
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isInputObjectType, |
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isLeafType, |
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isListType, |
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isNonNullType, |
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} from '../type/definition.mjs'; |
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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, onError = defaultOnError) { |
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return coerceInputValueImpl(inputValue, type, onError, undefined); |
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} |
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function defaultOnError(path, invalidValue, error) { |
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let errorPrefix = 'Invalid value ' + inspect(invalidValue); |
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if (path.length > 0) { |
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errorPrefix += ` at "value${printPathArray(path)}"`; |
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} |
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error.message = errorPrefix + ': ' + error.message; |
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throw error; |
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} |
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function coerceInputValueImpl(inputValue, type, onError, path) { |
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if (isNonNullType(type)) { |
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if (inputValue != null) { |
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return coerceInputValueImpl(inputValue, type.ofType, onError, path); |
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} |
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onError( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError( |
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`Expected non-nullable type "${inspect(type)}" not to be null.`, |
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), |
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); |
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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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const itemType = type.ofType; |
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if (isIterableObject(inputValue)) { |
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return Array.from(inputValue, (itemValue, index) => { |
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const itemPath = addPath(path, index, undefined); |
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return coerceInputValueImpl(itemValue, itemType, onError, itemPath); |
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}); |
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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( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError(`Expected type "${type.name}" to be an object.`), |
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); |
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return; |
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} |
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const coercedValue = {}; |
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const fieldDefs = type.getFields(); |
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for (const field of Object.values(fieldDefs)) { |
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const fieldValue = inputValue[field.name]; |
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if (fieldValue === undefined) { |
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if (field.defaultValue !== undefined) { |
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coercedValue[field.name] = field.defaultValue; |
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} else if (isNonNullType(field.type)) { |
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const typeStr = inspect(field.type); |
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onError( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError( |
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`Field "${field.name}" of required type "${typeStr}" was not provided.`, |
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), |
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); |
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} |
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continue; |
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} |
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coercedValue[field.name] = coerceInputValueImpl( |
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fieldValue, |
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field.type, |
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onError, |
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addPath(path, field.name, type.name), |
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); |
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} // Ensure every provided field is defined. |
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for (const fieldName of Object.keys(inputValue)) { |
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if (!fieldDefs[fieldName]) { |
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const suggestions = suggestionList( |
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fieldName, |
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Object.keys(type.getFields()), |
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); |
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onError( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError( |
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`Field "${fieldName}" is not defined by type "${type.name}".` + |
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didYouMean(suggestions), |
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), |
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); |
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} |
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} |
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return coercedValue; |
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} |
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if (isLeafType(type)) { |
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let parseResult; // Scalars and Enums determine if a input value is valid via parseValue(), |
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// which can throw to indicate failure. If it throws, maintain a reference |
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// to the original error. |
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try { |
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parseResult = type.parseValue(inputValue); |
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} catch (error) { |
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if (error instanceof GraphQLError) { |
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onError(pathToArray(path), inputValue, error); |
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} else { |
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onError( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError(`Expected type "${type.name}". ` + error.message, { |
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originalError: error, |
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}), |
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); |
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} |
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return; |
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} |
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if (parseResult === undefined) { |
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onError( |
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pathToArray(path), |
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inputValue, |
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new GraphQLError(`Expected type "${type.name}".`), |
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); |
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} |
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return parseResult; |
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} |
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/* c8 ignore next 3 */ |
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// Not reachable, all possible types have been considered. |
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false || invariant(false, 'Unexpected input type: ' + inspect(type)); |
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}
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