feat: make types importable in createDts()

src/__tests__/core.test.ts

@@ -1,6 +1,12 @@
 import { describe, it, expect } from 'vitest';
 import { createDts } from '../core/createDts';
 
+const PREFIX = `// Generated by generate-dts
+/* eslint-disable */
+/* prettier-ignore */
+// @ts-nocheck
+// noinspection JSUnusedGlobalSymbols`;
+
 describe('createDts', () => {
   it('Common forms', () => {
     const name = 'createDts';
@@ -43,19 +49,33 @@ describe('createDts', () => {
 
     expect(dts).toBe(getDtsBody(name, ['a: string', 'b: unknown']));
   });
-});
 
-const PREFIX = `// Generated by generate-dts
-/* eslint-disable */
-/* prettier-ignore */
-// @ts-nocheck
-// noinspection JSUnusedGlobalSymbols
+  it('With imports', () => {
+    const name = 'createDts';
+    const dts = createDts(
+      name,
+      { a: 'A' },
+      { importTypes: [{ name: 'A', from: './a' }] },
+    );
+
+    expect(dts).toBe(
+      `${PREFIX}
+import { A } from './a';
 export {}
-declare global {`;
+declare global {
+  export interface ${name} {
+    a: A
+  }
+}`,
+    );
+  });
+});
 
 const getDtsBody = (name: string, fieldList: string[]) => {
   const body = fieldList.map(field => `    ${field}`).join('\n');
   return `${PREFIX}
+export {}
+declare global {
   export interface ${name} {
 ${body}
   }

src/core/createDts.ts

@@ -9,27 +9,46 @@ const IGNORES = [
 
 export type CreateDtsOptions = Partial<{
   defaultType: string;
+  importTypes: Import[];
 }>;
 
+type Import = { name: string; from: string };
+
 export const createDts = (
   name: string,
   object: object,
   options = {} as CreateDtsOptions,
-) => {
+): string => {
   const body = createItem(object, 4, defaultOptions(options));
+  const imports = createImport(options.importTypes || []);
 
-  return `${INFO}
-${IGNORES}
-export {}
-declare global {
-  export interface ${name} ${body}
-}`;
+  const result = [
+    INFO,
+    IGNORES,
+    imports,
+    'export {}',
+    'declare global {',
+    `  export interface ${name} ${body}`,
+    '}',
+  ]
+    .filter(v => v)
+    .join('\n');
+
+  return result;
 };
 
 const defaultOptions = (options: CreateDtsOptions) => ({
   defaultType: options.defaultType || 'any',
 });
 
+const createImport = (imports: Import[]) => {
+  if (!imports.length) {
+    return;
+  }
+
+  return imports.map(i => `import { ${i.name} } from '${i.from}';`).join('\n');
+};
+
 const createItem = <T>(
   object: T,
   space: number,