feat: add validator package

packages/superset-ui-validator/README.md

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+## @superset-ui/validator
+
+[![Version](https://img.shields.io/npm/v/@superset-ui/validator.svg?style=flat)](https://img.shields.io/npm/v/@superset-ui/validator.svg?style=flat)
+[![David (path)](https://img.shields.io/david/apache-superset/superset-ui.svg?path=packages%2Fsuperset-ui-validator&style=flat-square)](https://david-dm.org/apache-superset/superset-ui?path=packages/superset-ui-validator)
+
+Description
+
+#### Example usage
+
+```js
+import { xxx } from '@superset-ui/validator';
+```
+
+#### API
+
+`fn(args)`
+
+- Do something
+
+### Development
+
+`@data-ui/build-config` is used to manage the build configuration for this package including babel
+builds, jest testing, eslint, and prettier.

packages/superset-ui-validator/package.json

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+{
+  "name": "@superset-ui/validator",
+  "version": "0.0.0",
+  "description": "Superset UI validator",
+  "sideEffects": false,
+  "main": "lib/index.js",
+  "module": "esm/index.js",
+  "files": [
+    "esm",
+    "lib"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/apache-superset/superset-ui.git"
+  },
+  "keywords": ["superset"],
+  "author": "Superset",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/apache-superset/superset-ui/issues"
+  },
+  "homepage": "https://github.com/apache-superset/superset-ui#readme",
+  "publishConfig": {
+    "access": "public"
+  },
+  "peerDependencies": {
+    "@superset-ui/translation": "^0.12.0"
+  }
+}

packages/superset-ui-validator/src/index.ts

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+export { default as validateInteger } from './validateInteger';
+export { default as validateNumber } from './validateNumber';
+export { default as validateNonEmpty } from './validateNonEmpty';

packages/superset-ui-validator/src/validateInteger.ts

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+import { t } from '@superset-ui/translation';
+
+export default function validateInteger(v: unknown) {
+  if (
+    (typeof v === 'string' && Number.isInteger(Number(v))) ||
+    (typeof v === 'number' && Number.isInteger(v))
+  ) {
+    return false;
+  }
+
+  return t('is expected to be an integer');
+}

packages/superset-ui-validator/src/validateNonEmpty.ts

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+import { t } from '@superset-ui/translation';
+
+export default function isNotEmpty(v: unknown) {
+  if (v === null || typeof v === 'undefined' || v === '' || (Array.isArray(v) && v.length === 0)) {
+    return t('cannot be empty');
+  }
+  return false;
+}

packages/superset-ui-validator/src/validateNumber.ts

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+import { t } from '@superset-ui/translation';
+
+export default function validateInteger(v: unknown) {
+  if (
+    (typeof v === 'string' && Number.isFinite(Number(v))) ||
+    (typeof v === 'number' && Number.isFinite(v))
+  ) {
+    return false;
+  }
+
+  return t('is expected to be a number');
+}

packages/superset-ui-validator/test/validateInteger.test.ts

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+import { validateInteger } from '../src';
+
+describe('validateInteger()', () => {
+  it('returns the warning message if invalid', () => {
+    expect(validateInteger(10.1)).toBeTruthy();
+    expect(validateInteger(undefined)).toBeTruthy();
+    expect(validateInteger(null)).toBeTruthy();
+    expect(validateInteger('')).toBeTruthy();
+  });
+  it('returns false if the input is valid', () => {
+    expect(validateInteger(10)).toBeFalsy();
+    expect(validateInteger('10')).toBeFalsy();
+  });
+});