@rapharacing/schemas/src/utils/quicktype.js

OpenAPI to JSON Schema to be used with middy for CC response validation

/* eslint-disable no-restricted-syntax */
/* eslint-disable guard-for-in */
/* eslint-disable no-console */
import {
	quicktype,
	InputData,
	JSONSchemaInput,
	JSONSchemaStore
} from "quicktype-core";

import fs from "fs-extra";

const SCHEMAS_PATH = "./src/schemas";
const INTERFACES_PATH = "./src/interfaces";

async function quicktypeJSONSchema(targetLanguage, typeName, jsonSchemaString) {
	const schemaInput = new JSONSchemaInput(new JSONSchemaStore());

	await schemaInput.addSource({ name: typeName, schema: jsonSchemaString });

	const inputData = new InputData();
	inputData.addInput(schemaInput);

	return quicktype({
		inputData,
		lang: targetLanguage,
		allPropertiesOptional: true,
		rendererOptions: {
			"just-types": true,
			"runtime-typecheck": false
		}
	});
}

const generateInterfaces = files => {
	const disallowed = "_definitions.json";
	const filterdFiles = files.filter(f => f !== disallowed);

	for (const idx in filterdFiles) {
		const file = filterdFiles[idx];

		const string = fs.readFile(file);
		const json = fs.readJsonSync(`${SCHEMAS_PATH}/${file}`);
		const { title } = json;

		quicktypeJSONSchema("typescript", title, string);
	}
};

try {
	console.log(`Generating definitions from ${SCHEMAS_PATH}`);

	// Ensures that a directory is empty.
	// Deletes directory contents if the directory is not empty.
	// If the directory does not exist, it is created. The directory itself is not deleted.
	fs.emptyDir(INTERFACES_PATH, error => {
		if (error) throw new Error(error);
	});

	// Get a list of schemas
	fs.readdir(SCHEMAS_PATH, (error, files) => {
		if (error) throw new Error(error);

		if (files) generateInterfaces(files);
	});
} catch (error) {
	throw new Error(error);
}