1 files changed, 21 insertions, 0 deletions
diff --git a/portal-FE-common/src/app/shared/helpers/must-match-validator.ts b/portal-FE-common/src/app/shared/helpers/must-match-validator.ts
new file mode 100644
index 00000000..70e9e1a4
--- /dev/null
+++ b/portal-FE-common/src/app/shared/helpers/must-match-validator.ts
@@ -0,0 +1,21 @@
+import { FormGroup } from '@angular/forms';
+
+// custom validator to check that two fields match
+export function MustMatch(controlName: string, matchingControlName: string) {
+    return (formGroup: FormGroup) => {
+        const control = formGroup.controls[controlName];
+        const matchingControl = formGroup.controls[matchingControlName];
+
+        if (matchingControl.errors && !matchingControl.errors.mustMatch) {
+            // return if another validator has already found an error on the matchingControl
+            return;
+        }
+
+        // set error on matchingControl if validation fails
+        if (control.value !== matchingControl.value) {
+            matchingControl.setErrors({ mustMatch: true });
+        } else {
+            matchingControl.setErrors(null);
+        }
+    }
+}
+\ No newline at end of file