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145 lines
5.6 KiB
TypeScript
145 lines
5.6 KiB
TypeScript
/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { isUnderTest } from '../utils';
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export class ValidationError extends Error {}
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export type Validator = (arg: any, path: string, context: ValidatorContext) => any;
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export type ValidatorContext = {
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tChannelImpl: (names: '*' | string[], arg: any, path: string, context: ValidatorContext) => any,
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binary: 'toBase64' | 'fromBase64' | 'buffer',
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};
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export const scheme: { [key: string]: Validator } = {};
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export function findValidator(type: string, method: string, kind: 'Initializer' | 'Event' | 'Params' | 'Result'): Validator {
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const validator = maybeFindValidator(type, method, kind);
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if (!validator)
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throw new ValidationError(`Unknown scheme for ${kind}: ${type}.${method}`);
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return validator;
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}
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export function maybeFindValidator(type: string, method: string, kind: 'Initializer' | 'Event' | 'Params' | 'Result'): Validator | undefined {
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const schemeName = type + (kind === 'Initializer' ? '' : method[0].toUpperCase() + method.substring(1)) + kind;
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return scheme[schemeName];
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}
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export function createMetadataValidator(): Validator {
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return tOptional(scheme['Metadata']);
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}
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export const tNumber: Validator = (arg: any, path: string, context: ValidatorContext) => {
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if (arg instanceof Number)
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return arg.valueOf();
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if (typeof arg === 'number')
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return arg;
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throw new ValidationError(`${path}: expected number, got ${typeof arg}`);
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};
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export const tBoolean: Validator = (arg: any, path: string, context: ValidatorContext) => {
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if (arg instanceof Boolean)
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return arg.valueOf();
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if (typeof arg === 'boolean')
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return arg;
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throw new ValidationError(`${path}: expected boolean, got ${typeof arg}`);
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};
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export const tString: Validator = (arg: any, path: string, context: ValidatorContext) => {
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if (arg instanceof String)
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return arg.valueOf();
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if (typeof arg === 'string')
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return arg;
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throw new ValidationError(`${path}: expected string, got ${typeof arg}`);
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};
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export const tBinary: Validator = (arg: any, path: string, context: ValidatorContext) => {
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if (context.binary === 'fromBase64') {
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if (arg instanceof String)
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return Buffer.from(arg.valueOf(), 'base64');
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if (typeof arg === 'string')
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return Buffer.from(arg, 'base64');
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throw new ValidationError(`${path}: expected base64-encoded buffer, got ${typeof arg}`);
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}
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if (context.binary === 'toBase64') {
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if (!(arg instanceof Buffer))
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throw new ValidationError(`${path}: expected Buffer, got ${typeof arg}`);
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return (arg as Buffer).toString('base64');
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}
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if (context.binary === 'buffer') {
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if (!(arg instanceof Buffer))
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throw new ValidationError(`${path}: expected Buffer, got ${typeof arg}`);
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return arg;
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}
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throw new ValidationError(`Unsupported binary behavior "${context.binary}"`);
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};
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export const tUndefined: Validator = (arg: any, path: string, context: ValidatorContext) => {
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if (Object.is(arg, undefined))
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return arg;
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throw new ValidationError(`${path}: expected undefined, got ${typeof arg}`);
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};
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export const tAny: Validator = (arg: any, path: string, context: ValidatorContext) => {
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return arg;
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};
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export const tOptional = (v: Validator): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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if (Object.is(arg, undefined))
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return arg;
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return v(arg, path, context);
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};
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};
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export const tArray = (v: Validator): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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if (!Array.isArray(arg))
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throw new ValidationError(`${path}: expected array, got ${typeof arg}`);
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return arg.map((x, index) => v(x, path + '[' + index + ']', context));
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};
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};
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export const tObject = (s: { [key: string]: Validator }): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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if (Object.is(arg, null))
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throw new ValidationError(`${path}: expected object, got null`);
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if (typeof arg !== 'object')
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throw new ValidationError(`${path}: expected object, got ${typeof arg}`);
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const result: any = {};
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for (const [key, v] of Object.entries(s)) {
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const value = v(arg[key], path ? path + '.' + key : key, context);
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if (!Object.is(value, undefined))
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result[key] = value;
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}
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if (isUnderTest()) {
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for (const [key, value] of Object.entries(arg)) {
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if (key.startsWith('__testHook'))
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result[key] = value;
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}
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}
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return result;
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};
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};
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export const tEnum = (e: string[]): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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if (!e.includes(arg))
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throw new ValidationError(`${path}: expected one of (${e.join('|')})`);
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return arg;
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};
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};
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export const tChannel = (names: '*' | string[]): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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return context.tChannelImpl(names, arg, path, context);
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};
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};
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export const tType = (name: string): Validator => {
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return (arg: any, path: string, context: ValidatorContext) => {
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const v = scheme[name];
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if (!v)
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throw new ValidationError(path + ': unknown type "' + name + '"');
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return v(arg, path, context);
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};
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};
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