Ma-eum

Maeum is RESTful API server boilerplate using fastify.js. Maeum don't implement wrapper function and don't change fastify.js architecture. Instead of change, static code generation using tool-chain. Maeum goal is below.

1. prefer use function
2. use static code generation and have to do static code analysis
3. effort consistency of DTO interface, validation, swagger document
4. effort more readable, more clear architecture
5. don't use wrapper function, don't change fastify architecture

Why fastify.js?

express.js and koa.js, nest.js are good framework. But express.js don't support async/await handler(Also you can use by simple middleware implement or using express-async-handler). fastify.js show good performance and rich feature like json-schema validation, auto generate swagger document, etc. Also fastify.js is unopinionated web framework!

Maeum flow fastify.js architecture. And use fully fastify.js feature, for example json-schema validation and swagger documentation, routing. Maeum offer same way to same feature.

Usage

# Clone the boilerplate:
git clone --depth=1 https://github.com/imjuni/maeum your-project-name

cd your-project-name
npm install

# run develop mode
npm run dev

# run develop mode with route, json-schema watch mode
npm run devs

Mechanics

Routing

Maeum auto generate route.ts file using directory structure. For example, handler/get/v1/poke-detail directory structure generated below.

export default function routing(fastify: FastifyInstance): void {
  fastify.get<IReqPokeDetail_vXR9OJd16Mi7ErFH2ubii3pmfPI8wKyi>(
    '/v1/poke-detail/:name',
    option_0subagxb2viNfout3Z8hQOjjpZPv5L8u,
    name_0subagxb2viNfout3Z8hQOjjpZPv5L8u,
  );
}

Maeum using fast-maker. fast-maker using TypeScript compiler API(via ts-morph). fast-maker help to every developer working same way.

Validation

Maeum using simple-tjscli. simple-tjscli using TypeScript compiler API(via ts-morph). simple-tjscli generate json-schema using ts-json-schema-generator. It using chokidar, watch your dto directory. If it detect add file or change file after generate json-schema. json-schema using for validation and swagger.io documentation. DTO interface conversion is powerfull mechanics keep consistency DTO interface and validation, swagger.io.

You can see auto generated json-schema IReqPokeDetail and IPokemon.

Swagger.io

Same mechanics validation.

Test

Test using fastify.js e2e test function(= inject). You can see example name.test.ts

Development flow

Request/Response flow

Maeum flow functional architecture. Every functional stage will be integrate pipe operator

graph TD
    A01[User]
    A02[Request<BR /> JSONSchema validation]
    A03[Data Transfer Object]
    A04[Data Process function]
    A05[Response<BR /> JSON serialization function]
    A06[Response<BR /> JSONSchema validation]

    A01-->|Request|A02
    A02-->|Request, Validation Result|A03
    A03-->|Request, Validation Result,<BR /> Transfered Data|A04
    A04-->|Request, Validation Result,<BR /> Transfered Data, Response JSON|A05
    A05-->|Response JSON|A06
    A06-->A01

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Request JSONSchema validation

using json-schema. fastify.js do this stage.

Data Transfer Object

using TypeScript interface.

Data Process function

You have to do implement business logic like that.

Response JSON serialization function

You have to do implement business logic like that

Response JSONSchema validation

using json-schema. fastify.js do this stage.