Created
January 29, 2021 10:36
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| import { IsString, validateOrReject } from 'class-validator' | |
| interface ICommandPackage { | |
| kind: 'commandPackage' | |
| command: string | |
| } | |
| interface IMessagePackage { | |
| kind: 'messagePackage' | |
| message: string | |
| } | |
| type IPackage = ICommandPackage | IMessagePackage | |
| async function newPackageFromDTO(object: any): Promise<IPackage> { | |
| let res: IPackage | |
| switch (object.kind as IPackage["kind"]) { | |
| case 'commandPackage': | |
| res = new CommandPackage({ ...object }) | |
| break; | |
| case 'messagePackage': | |
| res = new MessagePackage({ ...object }) | |
| break | |
| default: | |
| throw new Error(`invalid kind: ${object.kind}`) | |
| } | |
| try { | |
| await validateOrReject(res) | |
| return res | |
| } catch (e) { | |
| throw e | |
| } | |
| } | |
| class CommandPackage implements ICommandPackage { | |
| kind: 'commandPackage' = 'commandPackage'; | |
| @IsString() | |
| command: string; | |
| constructor({ command }: { command: string }) { | |
| this.command = command | |
| } | |
| } | |
| class MessagePackage implements IMessagePackage { | |
| kind: 'messagePackage' = 'messagePackage'; | |
| @IsString() | |
| message: string; | |
| constructor({ message }: { message: string }) { | |
| this.message = message | |
| } | |
| } | |
| async function test() { | |
| let commandPackageDTO = { | |
| valid: { | |
| kind: 'commandPackage', | |
| command: 'go', | |
| }, | |
| invalid: { | |
| kind: 'commandPackage', | |
| Command: 'go', | |
| } | |
| } | |
| let messagePackageDTO = { | |
| valid: { | |
| kind: 'messagePackage', | |
| message: 'yoyoyo', | |
| }, | |
| invalid: { | |
| kind: 'messagePackage', | |
| messageee: 'yoyoyo', | |
| } | |
| } | |
| let invalidPackageDTO = { | |
| kind: 'lol', | |
| command: 'go', | |
| } | |
| async function test(name: string, dto: any) { | |
| try { | |
| let instance = await newPackageFromDTO(dto) | |
| console.log(name, instance) | |
| } catch (e) { | |
| console.error(name, 'invalid') | |
| } | |
| } | |
| test('commandPackageDTO.valid', commandPackageDTO.valid) | |
| test('commandPackageDTO.invalid', commandPackageDTO.invalid) | |
| test('messagePackageDTO.valid', messagePackageDTO.valid) | |
| test('messagePackageDTO.invalid', messagePackageDTO.invalid) | |
| test('invalidPackageDTO', invalidPackageDTO) | |
| } | |
| test() |
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