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openapi

Generate JavaScript or TypeScript code from Swagger/OpenAPI specifications

  • 1.0.1
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  • npm
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openapijs/openapi

Generate JavaScript or TypeScript code from Swagger/OpenAPI specification.

Install

npm install openapi
# or
yarn add openapi
# or to global space

Examples

yarn openapi --file ../src/mocks/local-file-api.json
# or
yarn openapi --file ../src/mocks/local-file-api.yaml
# or
yarn openapi --file protocol://url/api.json

Usage CLI

yarn openapi [options]

Options:
  -V, --version            output the version number
  --output-dir <path>      Path output directory js api with types (default: './api')
  --config <path>          Path to config
  --mode <type>            Mode for additional info: 'prod' | 'dev' (default: 'prod')
  --file <path>            Path to file with api (*.json, *.yaml, url)
  --authorization <value>  Auth token for get api by url (it is header for request)
  --deprecated <type>      Action for deprecated methods: 'warning' | 'ignore' | 'exception' (default: 'warning')
  --import-request         Import request code in out code
  --original-body          Build with original request body
  --ignore-description     Print description of request
  -h, --help               display help for command

Usage config in file

This package use cosmiconfig for find config.

Config can exist next places

  • a openapi property in package.json
  • a .openapirc file in JSON or YAML format
  • a .openapirc.json file
  • a .openapirc.yaml, .openapirc.yml, or .openapirc.js file
  • a openapi.config.js file exporting a JS object
module.exports = {
  // Path to file with api (*.json, *.yaml, url)
  file: "./swagger-api.json", // string

  // Api in json (if not use option 'file', more important than path to file)
  apiJson: { ... },

  // Auth token for get api by url (it is header for request)
  authorization: "Token 123qwerty", // string

  // Path output directory js api with types
  outputDir: "./api", // string (default: "./api")

  // Mode for additional info
  mode: "prod", // "prod" | "dev" (default: "prod")

  // Action for deprecated methods
  deprecated: "warning", // "warning" | "ignore" | "exception" (default: "warning")

  // Import request code in out code
  // true — add import from `openapi/request`
  // false — embed request to `outputDir` and import from it
  // "disabled" — completely disable imporing `request`, use `templateCodeBefore`
  importRequest: true, // (default: false)

  // Build with original request body
  originalBody: true, // (default: false)

  // Ignore description of requests
  ignoreDescription: true, // default: false

  // Completely disable generating types file (.d.ts)
  disableTypesGenerate: true, // (default: false)

  /**
   * Change file name for source code
   * Also it can be a function
   * @example
   * templateFileNameCode: ({ swaggerData, changeCase }) => string,
   */
  templateFileNameCode: 'my-api.js', // (default: 'index.js')

  /**
   * Change file name for typing
   * Also it can be a function
   * @example
   * templateFileNameTypes: ({ swaggerData, changeCase }) => string,
   */
  templateFileNameTypes: 'my-api.d.ts', // (default: 'index.d.js')

  /**
   * Load presets and merge local properties to it
   * If preset created as a function, options can be passed
   * @example
   * presets: [
   *  ['my-super-openapi-preset', { passed: 'options' }],
   *  ['another-openapi-preset', { beautiful: 'options' }],
   * ]
   * If no options passed or used simple form, empty object passed to functional preset
   */
  presets: ['my-super-openapi-preset'], // (default: [])

  /**
   * Template before main block code
   * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   */
  templateCodeBefore: (extra) => "",

  /**
   * Template request code
   * @param {{
   *  name: string;
   *  method: string;
   *  url: string;
   *  isWarningDeprecated: boolean;
   *  isExistParams: boolean;
   *  defaultParams: object;
   * }} params
   * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  requestSwaggerData: { operationId: string; requestBody?: object; responses: object };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   */
  templateRequestCode: (params, extra) => "",

  /**
   * Template after maon block code
   * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   */
  templateCodeAfter: (extra) => "",

  /**
   * Template before main block types
   * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   */
  templateTypesBefore: (extra) => "",

  /**
   * Template request types
   * @param {{
   *  name: string;
   *  summary: string;
   *  description: string;
   *  countVariants: number;
   *  index: number;
   *  params: SwaggerData | null;
   *  addedParams: SwaggerData | null;
   *  result: SwaggerData | null;
   * }} params
   * * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  requestSwaggerData: { operationId: string; requestBody?: object; responses: object };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   *
   * @type {https://swagger.io/docs/specification/data-models/} SwaggerData
   */
  templateRequestTypes: (param, extra) => "",

  /**
   * Template after main block types
   * @param {{
   *  swaggerData: { info: object; paths: object; components: object; };
   *  changeCase: { paramCase: Function; camelCase: Function; pascalCase: Function; ... };
   * }} extra
   */
  templateTypesAfter: (extra) => "",
};

API

import { openapiGenerate } from "openapi";

const { code, types } = openapiGenerate({
  file: "./swagger-api.json",
});

console.log(code);
// => js code

console.log(types);
// => typescript types

More examples

Additional notes

  • If you will use this package after application created, you will have problem with generated api, because current api in your app will have different with your swagger api maybe.

How to create custom preset

  1. Create new NPM package (create directory and npm init there)
  2. Name your package with openapi-preset- prefix (ex.: openapi-preset-effector)
  3. Create index.js and set "main": "index.js" in your package.json
  4. Fill your index.js with any properties from list before
  5. Save and publish
  6. Use it like: presets: ['openapi-preset-example']

Hint: if you want to use local file as a preset, just use require.resolve: presets: [require.resolve('./local-preset')] It is works only in .js configs

Preset with options

  1. Export from your javascript file function with single argument
  2. Add valid options to your README.md
  3. Use nested array form to pass options to preset
Example preset with options
module.exports = (options) => ({
  templateRequestCode: (request, extra) =>
    options.parseBody
      ? generatorWithParser(request, extra)
      : simpleGenerator(request, extra),
});

Usage openapi.config.js:

module.exports = {
  file: "./swagger-api.json",
  presets: [
    ["openapi-preset-example", { parseBody: true }],
    [
      "openapi-preset-another",
      { requestImport: { module: "./axios-fabric", name: "axios" } },
    ],
  ],
};

Tested generation on swagger versions

  • 2.0
  • 3.0.1
  • 3.0.2

Roadmap

  • Struct generated files by tags
  • Detect nullable
  • Validate by schema
  • Combine types by

Development

How to release a new version

  1. Wait for release-drafter to generates a new draft release
  2. Pull all changes to local repository
  3. Run tests yarn test && yarn test-pack
  4. Create a new tag and change package.json npm version 1.2.3 (use the version from a draft release)
  5. Publish new version npm publish
  6. Push tags and changes git push origin master --tags
  7. Go to Releases and press "Edit" on draft release
  8. Check and fix release text
  9. Press "Publish release" button

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Package last updated on 10 Aug 2021

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