feat: add mimeTypes validation for uploads

src/fields/baseFields/mimeTypeValidator.spec.ts

@@ -0,0 +1,55 @@
+import { mimeTypeValidator } from './mimeTypeValidator';
+
+describe('mimeTypeValidator', () => {
+  it('should validate single mimeType', () => {
+    const mimeTypes = ['image/png'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('image/png')).toBe(true);
+  });
+
+  it('should validate multiple mimeTypes', () => {
+    const mimeTypes = ['image/png', 'application/pdf'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('image/png')).toBe(true);
+    expect(validate('application/pdf')).toBe(true);
+  });
+
+  it('should validate using wildcard', () => {
+    const mimeTypes = ['image/*'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('image/png')).toBe(true);
+    expect(validate('image/gif')).toBe(true);
+  });
+
+  it('should validate multiple wildcards', () => {
+    const mimeTypes = ['image/*', 'audio/*'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('image/png')).toBe(true);
+    expect(validate('audio/mpeg')).toBe(true);
+  });
+
+  it('should not validate when unmatched', () => {
+    const mimeTypes = ['image/png'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('audio/mpeg')).toBe('Invalid file type: \'audio/mpeg\'');
+  });
+
+  it('should not validate when unmatched - multiple mimeTypes', () => {
+    const mimeTypes = ['image/png', 'application/pdf'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('audio/mpeg')).toBe('Invalid file type: \'audio/mpeg\'');
+  });
+
+  it('should not validate using wildcard - unmatched', () => {
+    const mimeTypes = ['image/*'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('audio/mpeg')).toBe('Invalid file type: \'audio/mpeg\'');
+  });
+
+  it('should not validate multiple wildcards - unmatched', () => {
+    const mimeTypes = ['image/*', 'audio/*'];
+    const validate = mimeTypeValidator(mimeTypes);
+    expect(validate('video/mp4')).toBe('Invalid file type: \'video/mp4\'');
+    expect(validate('application/pdf')).toBe('Invalid file type: \'application/pdf\'');
+  });
+});

src/fields/baseFields/mimeTypeValidator.ts

@@ -0,0 +1,9 @@
+import { Validate } from '../config/types';
+
+export const mimeTypeValidator = (mimeTypes: string[]): Validate => (val: string) => {
+  const cleanedMimeTypes = mimeTypes.map((v) => v.replace('*', ''));
+
+  return !cleanedMimeTypes.some((v) => val.startsWith(v))
+    ? `Invalid file type: '${val}'`
+    : true;
+};

src/fields/config/types.ts

@@ -40,7 +40,7 @@ export type Labels = {
   plural: string;
 };
 
-export type Validate = (value: unknown, options?: any) => string | boolean | Promise<string | boolean>;
+export type Validate = (value: unknown, options?: any) => string | true | Promise<string | true>;
 
 export type OptionObject = {
   label: string