Validation for prices and objection

src/common/validators/has-objection-entries.validator.ts

@@ -0,0 +1,24 @@
+import {
+  ValidationArguments,
+  ValidatorConstraint,
+  ValidatorConstraintInterface,
+} from "class-validator";
+
+@ValidatorConstraint({ name: "hasObjectionEntries", async: false })
+export class HasObjectionEntriesConstraint
+  implements ValidatorConstraintInterface
+{
+  validate(_value: unknown, args: ValidationArguments): boolean {
+    const o = args.object as {
+      objectionParts?: unknown[];
+      newParts?: unknown[];
+    };
+    const partsLen = Array.isArray(o.objectionParts) ? o.objectionParts.length : 0;
+    const newLen = Array.isArray(o.newParts) ? o.newParts.length : 0;
+    return partsLen > 0 || newLen > 0;
+  }
+
+  defaultMessage(): string {
+    return "Provide at least one entry in objectionParts and/or newParts.";
+  }
+}