Type schema compiler

A compiler for an intuitive Javascript type schema definition language. Allows to build type checking schemas easily. For know, only compiles to AJV schemas.

(This software has been written using Haskell)

Usage

Run:

npx type-schema-compiler [files]

It will produce one js file per schema file that exports AJV schemas ready to compile.

Example

schema status
number
---
schema productStore
{
  products: [{
    name: string,
    stars: number,
    price: number
  }],
  store: string
}
---
schema user
[{
  id: number,
  name: string,
  age: number,
  worth: number,
  friends: [{
    id: number
  }]
}]

It will compile into a file of this shape

// schemaList.js
export const status = { type: "number" };
export const productStore = {type: ...};
export const user = {type: ...};

You can import them within a parent file and insert them in AJV compiler and move from there

import { status, productStore, user } from "./schemaList";
import Ajv from "ajv";

const ajv = new Ajv();

const statusValidator = ajv.compile(status);
const productValidator = ajv.compile(productStore);
const userValidator = ajv.compile(user);

const data = // .... the data to validate

const valid = productValidator.validate(data);

if (valid) {
  // ...
}

TODO

• Improve error messaging
• Improve export system
  • Add the possibility to have API routes as schema names
  • Make the compilation process within the export
• Control output folder
• Add more library choice
• Add watch mode
• Improve the complexity of the parsing algorithm
• Improve error catching
  • Reserved keyword
  • Distinct schema names
• Improve generality
  • More general object fields
  • Add tuples
  • Add checks

Feel free to contribute and suggest more features.