# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.FollowingRelationship do
import Ecto.Changeset
import Ecto.Query
+ alias Ecto.Changeset
alias FlakeId.Ecto.CompatType
+ alias Pleroma.FollowingRelationship.State
alias Pleroma.Repo
alias Pleroma.User
+ @type follow_state :: :follow_pending | :follow_accept | :follow_reject | :unfollow
+
schema "following_relationships" do
- field(:state, :string, default: "accept")
+ field(:state, State, default: :follow_pending)
belongs_to(:follower, User, type: CompatType)
belongs_to(:following, User, type: CompatType)
timestamps()
end
+ @doc "Returns underlying integer code for state atom"
+ def state_int_code(state_atom), do: State.__enum_map__() |> Keyword.fetch!(state_atom)
+
+ def accept_state_code, do: state_int_code(:follow_accept)
+
def changeset(%__MODULE__{} = following_relationship, attrs) do
following_relationship
|> cast(attrs, [:state])
|> put_assoc(:follower, attrs.follower)
|> put_assoc(:following, attrs.following)
|> validate_required([:state, :follower, :following])
+ |> unique_constraint(:follower_id,
+ name: :following_relationships_follower_id_following_id_index
+ )
+ |> validate_not_self_relationship()
+ end
+
+ def state_to_enum(state) when state in ["pending", "accept", "reject"] do
+ String.to_existing_atom("follow_#{state}")
+ end
+
+ def state_to_enum(state) do
+ raise "State is not convertible to Pleroma.FollowingRelationship.State: #{state}"
end
def get(%User{} = follower, %User{} = following) do
|> Repo.one()
end
- def update(follower, following, "reject"), do: unfollow(follower, following)
+ def update(follower, following, :follow_reject), do: unfollow(follower, following)
def update(%User{} = follower, %User{} = following, state) do
case get(follower, following) do
follow(follower, following, state)
following_relationship ->
- following_relationship
- |> cast(%{state: state}, [:state])
- |> validate_required([:state])
- |> Repo.update()
+ with {:ok, _following_relationship} <-
+ following_relationship
+ |> cast(%{state: state}, [:state])
+ |> validate_required([:state])
+ |> Repo.update() do
+ after_update(state, follower, following)
+ end
end
end
- def follow(%User{} = follower, %User{} = following, state \\ "accept") do
- %__MODULE__{}
- |> changeset(%{follower: follower, following: following, state: state})
- |> Repo.insert(on_conflict: :nothing)
+ @spec follow(User.t(), User.t()) :: {:ok, User.t(), User.t()} | {:error, any}
+ def follow(%User{} = follower, %User{} = following, state \\ :follow_accept) do
+ with {:ok, _following_relationship} <-
+ %__MODULE__{}
+ |> changeset(%{follower: follower, following: following, state: state})
+ |> Repo.insert(on_conflict: :nothing) do
+ after_update(state, follower, following)
+ end
end
+ @spec unfollow(User.t(), User.t()) :: {:ok, User.t(), User.t()} | {:error, any}
def unfollow(%User{} = follower, %User{} = following) do
case get(follower, following) do
- %__MODULE__{} = following_relationship -> Repo.delete(following_relationship)
- _ -> {:ok, nil}
+ %__MODULE__{} = following_relationship ->
+ with {:ok, _following_relationship} <- Repo.delete(following_relationship) do
+ after_update(:unfollow, follower, following)
+ end
+
+ _ ->
+ {:ok, follower, following}
+ end
+ end
+
+ @spec after_update(follow_state(), User.t(), User.t()) ::
+ {:ok, User.t(), User.t()} | {:error, any()}
+ defp after_update(state, %User{} = follower, %User{} = following) do
+ with {:ok, following} <- User.update_follower_count(following),
+ {:ok, follower} <- User.update_following_count(follower) do
+ Pleroma.Web.Streamer.stream("follow_relationship", %{
+ state: state,
+ following: following,
+ follower: follower
+ })
+
+ {:ok, follower, following}
+ else
+ err -> {:error, err}
end
end
__MODULE__
|> join(:inner, [r], u in User, on: r.follower_id == u.id)
|> where([r], r.following_id == ^user.id)
- |> where([r], r.state == "accept")
+ |> where([r], r.state == ^:follow_accept)
end
- def followers_ap_ids(%User{} = user, from_ap_ids \\ nil) do
+ def followers_ap_ids(user, from_ap_ids \\ nil)
+
+ def followers_ap_ids(_, []), do: []
+
+ def followers_ap_ids(%User{} = user, from_ap_ids) do
query =
user
|> followers_query()
def get_follow_requests(%User{id: id}) do
__MODULE__
|> join(:inner, [r], f in assoc(r, :follower))
- |> where([r], r.state == "pending")
+ |> where([r], r.state == ^:follow_pending)
|> where([r], r.following_id == ^id)
+ |> where([r, f], f.is_active == true)
|> select([r, f], f)
|> Repo.all()
end
def following?(%User{id: follower_id}, %User{id: followed_id}) do
__MODULE__
- |> where(follower_id: ^follower_id, following_id: ^followed_id, state: "accept")
+ |> where(follower_id: ^follower_id, following_id: ^followed_id, state: ^:follow_accept)
|> Repo.exists?()
end
__MODULE__
|> join(:inner, [r], u in User, on: r.following_id == u.id)
|> where([r], r.follower_id == ^user.id)
- |> where([r], r.state == "accept")
+ |> where([r], r.state == ^:follow_accept)
+ end
+
+ def outgoing_pending_follow_requests_query(%User{} = follower) do
+ __MODULE__
+ |> where([r], r.follower_id == ^follower.id)
+ |> where([r], r.state == ^:follow_pending)
end
def following(%User{} = user) do
|> join(:inner, [r], f in assoc(r, :follower))
|> where(following_id: ^origin.id)
|> where([r, f], f.allow_following_move == true)
+ |> where([r, f], f.local == true)
|> limit(50)
|> preload([:follower])
|> Repo.all()
|> Enum.map(fn following_relationship ->
- Repo.delete(following_relationship)
Pleroma.Web.CommonAPI.follow(following_relationship.follower, target)
+ Pleroma.Web.CommonAPI.unfollow(following_relationship.follower, origin)
end)
|> case do
[] ->
fr -> fr.follower_id == follower.id and fr.following_id == following.id
end)
end
+
+ defp validate_not_self_relationship(%Changeset{} = changeset) do
+ changeset
+ |> validate_follower_id_following_id_inequality()
+ |> validate_following_id_follower_id_inequality()
+ end
+
+ defp validate_follower_id_following_id_inequality(%Changeset{} = changeset) do
+ validate_change(changeset, :follower_id, fn _, follower_id ->
+ if follower_id == get_field(changeset, :following_id) do
+ [source_id: "can't be equal to following_id"]
+ else
+ []
+ end
+ end)
+ end
+
+ defp validate_following_id_follower_id_inequality(%Changeset{} = changeset) do
+ validate_change(changeset, :following_id, fn _, following_id ->
+ if following_id == get_field(changeset, :follower_id) do
+ [target_id: "can't be equal to follower_id"]
+ else
+ []
+ end
+ end)
+ end
+
+ @spec following_ap_ids(User.t()) :: [String.t()]
+ def following_ap_ids(%User{} = user) do
+ user
+ |> following_query()
+ |> select([r, u], u.ap_id)
+ |> Repo.all()
+ end
end
projects / akkoma / blobdiff