swagger-typescript-api-nextgen/src/translators/JavaScript.js

Nextgen TypeScript/JavaScript API generator from Swagger schema

const ts = require("typescript");

function translate(fileName, content, options) {
  const output = {};
  const host = ts.createCompilerHost(options, true);
  const fileNames = [fileName];
  const originalSourceFileGet = host.getSourceFile.bind(host);
  host.getSourceFile = (sourceFileName, languageVersion, onError, shouldCreateNewSourceFile) => {
    if (sourceFileName !== fileName)
      return originalSourceFileGet(
        sourceFileName,
        languageVersion,
        onError,
        shouldCreateNewSourceFile,
      );

    return ts.createSourceFile(
      sourceFileName,
      content,
      languageVersion,
      true,
      ts.ScriptKind.External,
    );
  };

  host.writeFile = (fileName, contents) => {
    output[fileName] = contents;
  };

  ts.createProgram(fileNames, options, host).emit();

  return output;
}

module.exports = {
  translate: (fileName, sourceTypeScript) => {
    const translated = translate(fileName, sourceTypeScript, {
      module: "ESNext",
      noImplicitReturns: true,
      alwaysStrict: true,
      target: ts.ScriptTarget.ESNext,
      declaration: true,
      noImplicitAny: false,
      sourceMap: false,
      removeComments: false,
      disableSizeLimit: true,
      esModuleInterop: true,
      emitDecoratorMetadata: true,
      skipLibCheck: true,
    });

    const sourceFileName = fileName.replace(ts.Extension.Ts, ts.Extension.Js);
    const declarationFileName = fileName.replace(ts.Extension.Ts, ts.Extension.Dts);

    return {
      sourceContent: translated[sourceFileName],
      declarationContent: translated[declarationFileName],
    };
  },
};