func toggleFollow()

in FriendlyPix/FPAccountViewController.swift [266:291]

• 21 lines of code
• 7 McCabe index (conditional complexity)

  func toggleFollow(_ follow: Bool) {
    feedViewController.followChanged = true
    let myFeed = "feed/\(uid)/"
    database.reference(withPath: "people/\(profile.uid)/posts").observeSingleEvent(of: .value, with: { snapshot in
      var lastPostID: Any = true
      var updateData = [String: Any]()
      if let posts = snapshot.value as? [String: Any] {
        // Add/remove followed user's posts to the home feed.
        for postId in posts.keys {
          updateData[myFeed + postId] = follow ? true : NSNull()
          lastPostID = postId
        }

        // Add/remove followed user to the 'following' list.
        updateData["people/\(self.uid)/following/\(self.profile.uid)"] = follow ? lastPostID : NSNull()

        // Add/remove signed-in user to the list of followers.
        updateData["followers/\(self.profile.uid)/\(self.uid)"] = follow ? true : NSNull()
        self.ref.updateChildValues(updateData) { error, _ in
          if let error = error {
            print(error.localizedDescription)
          }
        }
      }
    })
  }