Building typescript syntax programatically

examples.ts

import * as ts from 'typescript';

// import { Option as Option } from 'fp-ts/lib/Option';
const a = ts.createImportDeclaration(
  undefined,
  undefined,
  ts.createImportClause(
    undefined,
    ts.createNamedImports([
      ts.createImportSpecifier(
        ts.createIdentifier('Option'),
        ts.createIdentifier('Option')
      )
    ])
  ),
  ts.createStringLiteral('fp-ts/lib/Option')
)


// export type BulkAddRemoveTagsRequest = {
//   entryKeys: Array<string>;
//   addTags: Option<Array<string>>;
//   removeTags: Option<Array<string>>;
// };
const b = ts.createTypeAliasDeclaration(
  undefined,
  [ts.createModifier(ts.SyntaxKind.ExportKeyword)],
  ts.createIdentifier('BulkAddRemoveTagsRequest'),
  undefined,
  ts.createTypeLiteralNode([
    ts.createPropertySignature(
      undefined,
      ts.createIdentifier('entryKeys'),
      undefined,
      ts.createTypeReferenceNode(ts.createIdentifier('Array'), [
        ts.createKeywordTypeNode(ts.SyntaxKind.StringKeyword)
      ]),
      undefined
    ),
    ts.createPropertySignature(
      undefined,
      ts.createIdentifier('addTags'),
      undefined,
      ts.createTypeReferenceNode(ts.createIdentifier('Option'), [
        ts.createTypeReferenceNode(ts.createIdentifier('Array'), [
          ts.createKeywordTypeNode(ts.SyntaxKind.StringKeyword)
        ])
      ]),
      undefined
    ),
    ts.createPropertySignature(
      undefined,
      ts.createIdentifier('removeTags'),
      undefined,
      ts.createTypeReferenceNode(ts.createIdentifier('Option'), [
        ts.createTypeReferenceNode(ts.createIdentifier('Array'), [
          ts.createKeywordTypeNode(ts.SyntaxKind.StringKeyword)
        ])
      ]),
      undefined
    )
  ])
)

// export const BulkAddRemoveTagsRequestIO = ioType({
//   entryKeys: ioArray(ioString),
//   addTags: createOptionFromNullable(ioArray(ioString), 'addTags'),
//   removeTags: createOptionFromNullable(ioArray(ioString), 'removeTags'),
// });
const c =   ts.createVariableStatement(
  [ts.createModifier(ts.SyntaxKind.ExportKeyword)],
  ts.createVariableDeclarationList(
    [
      ts.createVariableDeclaration(
        ts.createIdentifier('BulkAddRemoveTagsRequestIO'),
        undefined,
        ts.createCall(ts.createIdentifier('ioType'), undefined, [
          ts.createObjectLiteral(
            [
              ts.createPropertyAssignment(
                ts.createIdentifier('entryKeys'),
                ts.createCall(ts.createIdentifier('ioArray'), undefined, [
                  ts.createIdentifier('ioString')
                ])
              ),
              ts.createPropertyAssignment(
                ts.createIdentifier('addTags'),
                ts.createCall(
                  ts.createIdentifier('createOptionFromNullable'),
                  undefined,
                  [
                    ts.createCall(ts.createIdentifier('ioArray'), undefined, [
                      ts.createIdentifier('ioString')
                    ]),
                    ts.createStringLiteral('addTags')
                  ]
                )
              ),
              ts.createPropertyAssignment(
                ts.createIdentifier('removeTags'),
                ts.createCall(
                  ts.createIdentifier('createOptionFromNullable'),
                  undefined,
                  [
                    ts.createCall(ts.createIdentifier('ioArray'), undefined, [
                      ts.createIdentifier('ioString')
                    ]),
                    ts.createStringLiteral('removeTags')
                  ]
                )
              )
            ],
            false
          )
        ])
      )
    ],
    ts.NodeFlags.Const
  )
)