refactor(app): migrate remaining form sections [EE-6231] (#10938)

app/react/kubernetes/applications/components/NameFormSection/nameValidation.ts

@@ -0,0 +1,43 @@
+import { SchemaOf, string as yupString } from 'yup';
+
+type ValidationData = {
+  existingNames: string[];
+  isEdit: boolean;
+  originalName?: string;
+};
+
+export function appNameValidation(
+  validationData?: ValidationData
+): SchemaOf<string> {
+  return yupString()
+    .required('This field is required.')
+    .test(
+      'is-unique',
+      'An application with the same name already exists inside the selected namespace.',
+      (appName) => {
+        if (!validationData || !appName) {
+          return true;
+        }
+        // if creating, check if the name is unique
+        if (!validationData.isEdit) {
+          return !validationData.existingNames.includes(appName);
+        }
+        // if editing, the original name will be in the list of existing names
+        // remove it before checking if the name is unique
+        const updatedExistingNames = validationData.existingNames.filter(
+          (name) => name !== validationData.originalName
+        );
+        return !updatedExistingNames.includes(appName);
+      }
+    )
+    .test(
+      'is-valid',
+      "This field must consist of lower case alphanumeric characters or '-', contain at most 63 characters, start with an alphabetic character, and end with an alphanumeric character (e.g. 'my-name', or 'abc-123').",
+      (appName) => {
+        if (!appName) {
+          return true;
+        }
+        return /^[a-z]([a-z0-9-]{0,61}[a-z0-9])?$/g.test(appName);
+      }
+    );
+}