1 files changed, 32 insertions, 0 deletions
diff --git a/src/utils/users.ts b/src/utils/users.ts
index d5e44b36..f9d6d6b7 100644
--- a/src/utils/users.ts
+++ b/src/utils/users.ts
@@ -174,3 +174,35 @@ export const defaultUserProfile = () => {
   const defaultImage = require('../assets/images/avatar-placeholder.png');
   return defaultImage;
 };
+
+/**
+ * Used to determine whether the logged-in user is able to view userX's private
+ * information or not.
+ *
+ * @param state redux store's root state
+ * @param userXId target userX's id
+ * @param screenType current screen type
+ * @returns true if abel to view private info, false otherwise
+ */
+export const canViewProfile = (
+  state: RootState,
+  userXId: string | undefined,
+  screenType: ScreenType,
+) => {
+  // own profile
+  if (!userXId || state.user.user.userId === userXId) {
+    return true;
+  }
+  // not private
+  if (!(userXId && state.userX[screenType][userXId].profile.is_private)) {
+    return true;
+  }
+  // is friend
+  if (
+    userXId &&
+    state.userX[screenType][userXId].profile.friendship_status === 'friends'
+  ) {
+    return true;
+  }
+  return false;
+};