ts-morph: Convert named imports to namespace import

foo.ts

// https://gist.github.com/OliverJAsh/5de515ad1f81b88409c13cd548c20893
// https://twitter.com/OliverJAsh/status/1334537098469265413

const { Project } = require('ts-morph');

const project = new Project({
  tsConfigFilePath: 'tsconfig.app.no-references.json',
});

const PATH_TO_MATCH = '/Users/oliverash/Development/unsplash-web/shared/helpers/booleans.ts';

project.getSourceFiles().forEach((sourceFile) => {
  sourceFile.getImportDeclarations().forEach((importDec) => {
    if (importDec.wasForgotten()) {
      return
    }
    const importSourceFile = importDec.getModuleSpecifierSourceFile();
    if (importSourceFile !== undefined) {
      const path = importSourceFile.getFilePath();
      if (path === PATH_TO_MATCH) {
        const edits = project.getLanguageService().getEditsForRefactor(
          sourceFile,
          {},
          importDec,
          "Convert import",
          "Convert named imports to namespace import",
          {}
        );
        if (edits != null) {
          edits.applyChanges();
        }
      }
    }
  });
});
project.save();