+ ap_followers = followed.follower_address
+ if following?(follower, followed) do
+ {:error,
+ "Could not follow user: #{followed.nickname} is already on your list."}
+ else
+ if !followed.local && follower.local do
+ Websub.subscribe(follower, followed)
+ end
+
+ following = [ap_followers | follower.following]
+ |> Enum.uniq
+
+ follower = follower
+ |> follow_changeset(%{following: following})
+ |> Repo.update
+
+ {:ok, followed} = update_follower_count(followed)
+
+ follower
+ end
+ end
+
+ def unfollow(%User{} = follower, %User{} = followed) do
+ ap_followers = followed.follower_address
+ if following?(follower, followed) do
+ following = follower.following
+ |> List.delete(ap_followers)
+
+ { :ok, follower } = follower
+ |> follow_changeset(%{following: following})
+ |> Repo.update
+
+ {:ok, followed} = update_follower_count(followed)
+
+ {:ok, follower, Utils.fetch_latest_follow(follower, followed)}
+ else
+ {:error, "Not subscribed!"}
+ end
+ end
+
+ def following?(%User{} = follower, %User{} = followed) do
+ Enum.member?(follower.following, followed.follower_address)
+ end
+
+ def get_by_ap_id(ap_id) do
+ Repo.get_by(User, ap_id: ap_id)
+ end
+
+ def get_cached_by_ap_id(ap_id) do
+ key = "ap_id:#{ap_id}"
+ Cachex.get!(:user_cache, key, fallback: fn(_) -> get_by_ap_id(ap_id) end)
+ end
+
+ def get_cached_by_nickname(nickname) do
+ key = "nickname:#{nickname}"
+ Cachex.get!(:user_cache, key, fallback: fn(_) -> get_or_fetch_by_nickname(nickname) end)
+ end
+
+ def get_by_nickname(nickname) do
+ Repo.get_by(User, nickname: nickname)
+ end
+
+ def get_cached_user_info(user) do
+ key = "user_info:#{user.id}"
+ Cachex.get!(:user_cache, key, fallback: fn(_) -> user_info(user) end)
+ end
+
+ def get_or_fetch_by_nickname(nickname) do
+ with %User{} = user <- get_by_nickname(nickname) do
+ user
+ else _e ->
+ with [nick, domain] <- String.split(nickname, "@"),
+ {:ok, user} <- OStatus.make_user(nickname) do
+ user
+ else _e -> nil
+ end
+ end
+ end
+
+ # TODO: these queries could be more efficient if the type in postgresql wasn't map, but array.
+ def get_followers(%User{id: id, follower_address: follower_address}) do
+ q = from u in User,
+ where: fragment("? @> ?", u.following, ^follower_address ),
+ where: u.id != ^id
+
+ {:ok, Repo.all(q)}
+ end
+
+ def get_friends(%User{id: id, following: following}) do
+ q = from u in User,
+ where: u.follower_address in ^following,
+ where: u.id != ^id
+
+ {:ok, Repo.all(q)}
+ end
+
+ def update_note_count(%User{} = user) do
+ note_count_query = from a in Object,
+ where: fragment("? @> ?", a.data, ^%{actor: user.ap_id, type: "Note"}),
+ select: count(a.id)
+
+ note_count = Repo.one(note_count_query)
+
+ new_info = Map.put(user.info, "note_count", note_count)
+
+ cs = info_changeset(user, %{info: new_info})
+
+ Repo.update(cs)
+ end
+
+ def update_follower_count(%User{} = user) do
+ follower_count_query = from u in User,
+ where: fragment("? @> ?", u.following, ^user.follower_address),
+ select: count(u.id)
+
+ follower_count = Repo.one(follower_count_query)
+
+ new_info = Map.put(user.info, "follower_count", follower_count)
+
+ cs = info_changeset(user, %{info: new_info})
+
+ Repo.update(cs)
+ end
+
+ def get_notified_from_activity(%Activity{data: %{"to" => to}} = activity) do
+ query = from u in User,
+ where: u.ap_id in ^to,
+ where: u.local == true