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user_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.UserRelationship do
use Ecto.Schema
import Ecto.Changeset
import Ecto.Query
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.UserRelationship
schema "user_relationships" do
belongs_to(:source, User, type: FlakeId.Ecto.CompatType)
belongs_to(:target, User, type: FlakeId.Ecto.CompatType)
field(:relationship_type, UserRelationshipTypeEnum)
timestamps(updated_at: false)
end
for relationship_type <- Keyword.keys(UserRelationshipTypeEnum.__enum_map__()) do
# Definitions of `create_block/2`, `create_mute/2` etc.
def unquote(:"create_#{relationship_type}")(source, target),
do: create(unquote(relationship_type), source, target)
# Definitions of `delete_block/2`, `delete_mute/2` etc.
def unquote(:"delete_#{relationship_type}")(source, target),
do: delete(unquote(relationship_type), source, target)
# Definitions of `block_exists?/2`, `mute_exists?/2` etc.
def unquote(:"#{relationship_type}_exists?")(source, target),
do: exists?(unquote(relationship_type), source, target)
end
def changeset(%UserRelationship{} = user_relationship, params \\ %{}) do
user_relationship
|> cast(params, [:relationship_type, :source_id, :target_id])
|> validate_required([:relationship_type, :source_id, :target_id])
|> unique_constraint(:relationship_type,
name: :user_relationships_source_id_relationship_type_target_id_index
)
|> validate_not_self_relationship()
end
def exists?(relationship_type, %User{} = source, %User{} = target) do
UserRelationship
|> where(relationship_type: ^relationship_type, source_id: ^source.id, target_id: ^target.id)
|> Repo.exists?()
end
def create(relationship_type, %User{} = source, %User{} = target) do
%UserRelationship{}
|> changeset(%{
relationship_type: relationship_type,
source_id: source.id,
target_id: target.id
})
|> Repo.insert(
on_conflict: :replace_all_except_primary_key,
conflict_target: [:source_id, :relationship_type, :target_id]
)
end
def delete(relationship_type, %User{} = source, %User{} = target) do
attrs = %{relationship_type: relationship_type, source_id: source.id, target_id: target.id}
case Repo.get_by(UserRelationship, attrs) do
%UserRelationship{} = existing_record -> Repo.delete(existing_record)
nil -> {:ok, nil}
end
end
defp validate_not_self_relationship(%Ecto.Changeset{} = changeset) do
changeset
|> validate_change(:target_id, fn _, target_id ->
if target_id == get_field(changeset, :source_id) do
[target_id: "can't be equal to source_id"]
else
[]
end
end)
|> validate_change(:source_id, fn _, source_id ->
if source_id == get_field(changeset, :target_id) do
[source_id: "can't be equal to target_id"]
else
[]
end
end)
end
end

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