1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.FollowingRelationship do
12 alias FlakeId.Ecto.CompatType
13 alias Pleroma.FollowingRelationship.State
17 schema "following_relationships" do
18 field(:state, State, default: :follow_pending)
20 belongs_to(:follower, User, type: CompatType)
21 belongs_to(:following, User, type: CompatType)
26 @doc "Returns underlying integer code for state atom"
27 def state_int_code(state_atom), do: State.__enum_map__() |> Keyword.fetch!(state_atom)
29 def accept_state_code, do: state_int_code(:follow_accept)
31 def changeset(%__MODULE__{} = following_relationship, attrs) do
32 following_relationship
33 |> cast(attrs, [:state])
34 |> put_assoc(:follower, attrs.follower)
35 |> put_assoc(:following, attrs.following)
36 |> validate_required([:state, :follower, :following])
37 |> unique_constraint(:follower_id,
38 name: :following_relationships_follower_id_following_id_index
40 |> validate_not_self_relationship()
43 def state_to_enum(state) when state in ["pending", "accept", "reject"] do
44 String.to_existing_atom("follow_#{state}")
47 def state_to_enum(state) do
48 raise "State is not convertible to Pleroma.FollowingRelationship.State: #{state}"
51 def get(%User{} = follower, %User{} = following) do
53 |> where(follower_id: ^follower.id, following_id: ^following.id)
57 def update(follower, following, :follow_reject), do: unfollow(follower, following)
59 def update(%User{} = follower, %User{} = following, state) do
60 case get(follower, following) do
62 follow(follower, following, state)
64 following_relationship ->
65 with {:ok, _following_relationship} <-
66 following_relationship
67 |> cast(%{state: state}, [:state])
68 |> validate_required([:state])
70 after_update(state, follower, following)
75 def follow(%User{} = follower, %User{} = following, state \\ :follow_accept) do
76 with {:ok, _following_relationship} <-
78 |> changeset(%{follower: follower, following: following, state: state})
79 |> Repo.insert(on_conflict: :nothing) do
80 after_update(state, follower, following)
84 def unfollow(%User{} = follower, %User{} = following) do
85 case get(follower, following) do
86 %__MODULE__{} = following_relationship ->
87 with {:ok, _following_relationship} <- Repo.delete(following_relationship) do
88 after_update(:unfollow, follower, following)
96 defp after_update(state, %User{} = follower, %User{} = following) do
97 with {:ok, following} <- User.update_follower_count(following),
98 {:ok, follower} <- User.update_following_count(follower) do
99 Pleroma.Web.Streamer.stream("follow_relationship", %{
101 following: following,
105 {:ok, follower, following}
109 def follower_count(%User{} = user) do
110 %{followers: user, deactivated: false}
111 |> User.Query.build()
112 |> Repo.aggregate(:count, :id)
115 def followers_query(%User{} = user) do
117 |> join(:inner, [r], u in User, on: r.follower_id == u.id)
118 |> where([r], r.following_id == ^user.id)
119 |> where([r], r.state == ^:follow_accept)
122 def followers_ap_ids(user, from_ap_ids \\ nil)
124 def followers_ap_ids(_, []), do: []
126 def followers_ap_ids(%User{} = user, from_ap_ids) do
130 |> select([r, u], u.ap_id)
134 where(query, [r, u], u.ap_id in ^from_ap_ids)
142 def following_count(%User{id: nil}), do: 0
144 def following_count(%User{} = user) do
145 %{friends: user, deactivated: false}
146 |> User.Query.build()
147 |> Repo.aggregate(:count, :id)
150 def get_follow_requests(%User{id: id}) do
152 |> join(:inner, [r], f in assoc(r, :follower))
153 |> where([r], r.state == ^:follow_pending)
154 |> where([r], r.following_id == ^id)
155 |> where([r, f], f.is_active == true)
160 def following?(%User{id: follower_id}, %User{id: followed_id}) do
162 |> where(follower_id: ^follower_id, following_id: ^followed_id, state: ^:follow_accept)
166 def following_query(%User{} = user) do
168 |> join(:inner, [r], u in User, on: r.following_id == u.id)
169 |> where([r], r.follower_id == ^user.id)
170 |> where([r], r.state == ^:follow_accept)
173 def outgoing_pending_follow_requests_query(%User{} = follower) do
175 |> where([r], r.follower_id == ^follower.id)
176 |> where([r], r.state == ^:follow_pending)
179 def following(%User{} = user) do
181 following_query(user)
182 |> select([r, u], u.follower_address)
185 if not user.local or user.invisible do
188 [user.follower_address | following]
192 def move_following(origin, target) do
194 |> join(:inner, [r], f in assoc(r, :follower))
195 |> where(following_id: ^origin.id)
196 |> where([r, f], f.allow_following_move == true)
197 |> where([r, f], f.local == true)
199 |> preload([:follower])
201 |> Enum.map(fn following_relationship ->
202 Pleroma.Web.CommonAPI.follow(following_relationship.follower, target)
203 Pleroma.Web.CommonAPI.unfollow(following_relationship.follower, origin)
207 User.update_follower_count(origin)
211 move_following(origin, target)
215 def all_between_user_sets(
219 when is_list(source_users) and is_list(target_users) do
220 source_user_ids = User.binary_id(source_users)
221 target_user_ids = User.binary_id(target_users)
226 "(follower_id = ANY(?) AND following_id = ANY(?)) OR \
227 (follower_id = ANY(?) AND following_id = ANY(?))",
237 def find(following_relationships, follower, following) do
238 Enum.find(following_relationships, fn
239 fr -> fr.follower_id == follower.id and fr.following_id == following.id
244 For a query with joined activity's actor,
245 keeps rows where actor is followed by user -or- is NOT domain-blocked by user.
247 def keep_following_or_not_domain_blocked(query, user) do
250 [_, user_actor: user_actor],
252 # "(actor's domain NOT in domain_blocks) OR (actor IS in followed AP IDs)"
254 NOT (substring(? from '.*://([^/]*)') = ANY(?)) OR
255 ? = ANY(SELECT ap_id FROM users AS u INNER JOIN following_relationships AS fr
256 ON u.id = fr.following_id WHERE fr.follower_id = ? AND fr.state = ?)
261 ^User.binary_id(user.id),
267 defp validate_not_self_relationship(%Changeset{} = changeset) do
269 |> validate_follower_id_following_id_inequality()
270 |> validate_following_id_follower_id_inequality()
273 defp validate_follower_id_following_id_inequality(%Changeset{} = changeset) do
274 validate_change(changeset, :follower_id, fn _, follower_id ->
275 if follower_id == get_field(changeset, :following_id) do
276 [source_id: "can't be equal to following_id"]
283 defp validate_following_id_follower_id_inequality(%Changeset{} = changeset) do
284 validate_change(changeset, :following_id, fn _, following_id ->
285 if following_id == get_field(changeset, :follower_id) do
286 [target_id: "can't be equal to follower_id"]
293 @spec following_ap_ids(User.t()) :: [String.t()]
294 def following_ap_ids(%User{} = user) do
297 |> select([r, u], u.ap_id)