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following_relationship.ex
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.FollowingRelationship do
use Ecto.Schema
import Ecto.Changeset
import Ecto.Query
alias FlakeId.Ecto.CompatType
alias Pleroma.Repo
alias Pleroma.User
schema "following_relationships" do
field(:state, :string, default: "accept")
belongs_to(:follower, User, type: CompatType)
belongs_to(:following, User, type: CompatType)
timestamps()
end
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])
end
def get(%User{} = follower, %User{} = following) do
__MODULE__
|> where(follower_id: ^follower.id, following_id: ^following.id)
|> Repo.one()
end
def update(follower, following, "reject"), do: unfollow(follower, following)
def update(%User{} = follower, %User{} = following, state) do
case get(follower, following) do
nil ->
follow(follower, following, state)
following_relationship ->
following_relationship
|> cast(%{state: state}, [:state])
|> validate_required([:state])
|> Repo.update()
end
end
def follow(%User{} = follower, %User{} = following, state \\ "accept") do
%__MODULE__{}
|> changeset(%{follower: follower, following: following, state: state})
|> Repo.insert(on_conflict: :nothing)
end
def unfollow(%User{} = follower, %User{} = following) do
case get(follower, following) do
%__MODULE__{} = following_relationship -> Repo.delete(following_relationship)
_ -> {:ok, nil}
end
end
def follower_count(%User{} = user) do
%{followers: user, deactivated: false}
|> User.Query.build()
|> Repo.aggregate(:count, :id)
end
def following_count(%User{id: nil}), do: 0
def following_count(%User{} = user) do
%{friends: user, deactivated: false}
|> User.Query.build()
|> Repo.aggregate(:count, :id)
end
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.following_id == ^id)
|> 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")
|> Repo.exists?()
end
def following(%User{} = user) do
following =
__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")
|> select([r, u], u.follower_address)
|> Repo.all()
if not user.local or user.invisible do
following
else
[user.follower_address | following]
end
end
def move_following(origin, target) do
__MODULE__
|> join(:inner, [r], f in assoc(r, :follower))
|> where(following_id: ^origin.id)
|> where([r, f], f.allow_following_move == true)
|> limit(50)
|> preload([:follower])
|> Repo.all()
|> Enum.map(fn following_relationship ->
Repo.delete(following_relationship)
Pleroma.Web.CommonAPI.follow(following_relationship.follower, target)
end)
|> case do
[] ->
User.update_follower_count(origin)
:ok
_ ->
move_following(origin, target)
end
end
end

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