fix(view-secret-value): backwards compatibility for read

frontend/src/lib/fn/permission.ts

@@ -0,0 +1,36 @@
+import { MongoAbility, subject } from "@casl/ability";
+
+import { ProjectPermissionSet } from "@app/context/ProjectPermissionContext";
+import {
+  ProjectPermissionSecretActions,
+  ProjectPermissionSub,
+  SecretSubjectFields
+} from "@app/context/ProjectPermissionContext/types";
+
+export function secretsPermissionCan(
+  permission: MongoAbility<ProjectPermissionSet>,
+  action: Extract<
+    ProjectPermissionSecretActions,
+    ProjectPermissionSecretActions.DescribeSecret | ProjectPermissionSecretActions.ReadValue
+  >,
+  subjectFields?: SecretSubjectFields
+) {
+  let canNewPermission = false;
+  let canOldPermission = false;
+
+  if (subjectFields) {
+    canNewPermission = permission.can(action, subject(ProjectPermissionSub.Secrets, subjectFields));
+    canOldPermission = permission.can(
+      ProjectPermissionSecretActions.DescribeAndReadValue,
+      subject(ProjectPermissionSub.Secrets, subjectFields)
+    );
+  } else {
+    canNewPermission = permission.can(action, ProjectPermissionSub.Secrets);
+    canOldPermission = permission.can(
+      ProjectPermissionSecretActions.DescribeAndReadValue,
+      ProjectPermissionSub.Secrets
+    );
+  }
+
+  return canNewPermission || canOldPermission;
+}