@sealevel-dev/sdk/codegen/openapi.ts

TypeScript SDK for Sealevel.

import { createEnv } from "@t3-oss/env-core";
import { config } from "dotenv";
import fs from "fs";
import openapiTS, { astToString, type OpenAPI3 } from "openapi-typescript";
import path from "path";
import { z } from "zod";

import { API_DEFAULT_BASE_URL } from "~/api/const";

config();

const env = createEnv({
  server: {
    API_BASE_URL: z.string().default(API_DEFAULT_BASE_URL),
    OUTPUT_DIR: z.string().default("src/api"),
  },
  runtimeEnvStrict: {
    API_BASE_URL: process.env.API_BASE_URL,
    OUTPUT_DIR: process.env.OUTPUT_DIR,
  },
});

const API_VERSIONS = ["v1"];

const SCHEMA_FILE_NAME = "schema.ts";
const TYPES_FILE_NAME = "types.ts";

const FILE_HEADER = `/**
 * This file was generated by codegen/openapi.ts
 * Do not edit this file manually.
 */

/* eslint-disable */

`;

const TYPES_HEADER = `import type { components } from "./schema";

`;

function capitalize(str: string) {
  return str.charAt(0).toUpperCase() + str.slice(1).toLowerCase();
}

export async function main() {
  for (const version of API_VERSIONS) {
    const url = `${env.API_BASE_URL}/${version}/openapi.json`;
    const schemaResponse = await fetch(url);
    if (!schemaResponse.ok) {
      console.error(`Failed to fetch schema: ${schemaResponse.statusText}`);
      process.exit(1);
    }
    const schema = (await schemaResponse.json()) as OpenAPI3;

    const ast = await openapiTS(schema);
    const schemaOutput = FILE_HEADER + astToString(ast);

    let typesOutput = FILE_HEADER + TYPES_HEADER;
    if (schema.components?.schemas) {
      for (const key in schema.components.schemas) {
        const typeName = capitalize(version) + key;
        typesOutput += `export type ${typeName} = components["schemas"]["${key}"]\n`;
      }
    }

    const outputDir = path.join(
      import.meta.dirname,
      "..",
      env.OUTPUT_DIR,
      version,
    );
    await fs.promises.mkdir(outputDir, { recursive: true });
    await fs.promises.writeFile(
      path.join(outputDir, SCHEMA_FILE_NAME),
      schemaOutput,
    );
    await fs.promises.writeFile(
      path.join(outputDir, TYPES_FILE_NAME),
      typesOutput,
    );
  }
}

void main();