feat(core): add typeof filter

Author: JSYOU

packages/core/src/lib/template-engine/built-in-extensions/sql-helper/index.ts

@@ -1,4 +1,11 @@
 import { UniqueFilterBuilder } from './uniqueFilterBuilder';
 import { UniqueFilterRunner } from './uniqueFilterRunner';
+import { TypeofBuilder } from './typeofBuilder';
+import { TypeofRunner } from './typeofRunner';
 
-export default [UniqueFilterBuilder, UniqueFilterRunner];
+export default [
+  UniqueFilterBuilder,
+  UniqueFilterRunner,
+  TypeofBuilder,
+  TypeofRunner,
+];

packages/core/src/lib/template-engine/built-in-extensions/sql-helper/typeofBuilder.ts

@@ -0,0 +1,9 @@
+import {
+  FilterBuilder,
+  VulcanInternalExtension,
+} from '@vulcan-sql/core/models';
+
+@VulcanInternalExtension()
+export class TypeofBuilder extends FilterBuilder {
+  public filterName = 'typeof';
+}

packages/core/src/lib/template-engine/built-in-extensions/sql-helper/typeofRunner.ts

@@ -0,0 +1,15 @@
+import {
+  FilterRunner,
+  FilterRunnerTransformOptions,
+  VulcanInternalExtension,
+} from '@vulcan-sql/core/models';
+
+@VulcanInternalExtension()
+export class TypeofRunner extends FilterRunner {
+  public filterName = 'typeof';
+  public async transform({
+    value,
+  }: FilterRunnerTransformOptions): Promise<any> {
+    return typeof value;
+  }
+}