refactor(nestjs): wip

packages/server/src/common/decorators/Validators.ts

@@ -0,0 +1,32 @@
+import { Transform } from 'class-transformer';
+import { ValidateIf, ValidationOptions } from 'class-validator';
+
+/**
+ * Decorator that converts the property value to a number.
+ * @returns PropertyDecorator
+ */
+export function ToNumber() {
+  return Transform(({ value, key }) => {
+    const defaultValue = null;
+
+    if (typeof value === 'number') {
+      return value;
+    }
+    // If value is an empty string or undefined/null, return it as-is (won’t pass validation)
+    if (value === '' || value === null || value === undefined) {
+      return defaultValue;
+    }
+    const parsed = Number(value);
+    return !isNaN(parsed) ? parsed : value;
+  });
+}
+
+/**
+ * Validates if the property is not empty.
+ * @returns PropertyDecorator
+ */
+export function IsOptional(validationOptions?: ValidationOptions) {
+  return ValidateIf((_obj, value) => {
+    return value !== null && value !== undefined && value !== '';
+  }, validationOptions);
+}