habitica-self-host/website/common/script/libs/isPinned.js

export default function isPinned (user, item, checkOfficialPinnedItems) {
  if (user === null) return false;

  const isPinnedOfficial = checkOfficialPinnedItems !== undefined
    && checkOfficialPinnedItems.findIndex(pinned => pinned.path === item.path) > -1;
  const isItemUnpinned = user.unpinnedItems !== undefined
    && user.unpinnedItems.findIndex(unpinned => unpinned.path === item.path) > -1;
  const isItemPinned = user.pinnedItems !== undefined
    && user.pinnedItems.findIndex(pinned => pinned.path === item.path) > -1;

  if (isPinnedOfficial && !isItemUnpinned) return true;

  return isItemPinned;
}