# Pleroma: A lightweight social networking server # Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.User.Query do @moduledoc """ User query builder module. Builds query from new query or another user query. ## Example: query = Pleroma.User.Query(%{nickname: "nickname"}) another_query = Pleroma.User.Query.build(query, %{email: "email@example.com"}) Pleroma.Repo.all(query) Pleroma.Repo.all(another_query) Adding new rules: - *ilike criteria* - add field to @ilike_criteria list - pass non empty string - e.g. Pleroma.User.Query.build(%{nickname: "nickname"}) - *equal criteria* - add field to @equal_criteria list - pass non empty string - e.g. Pleroma.User.Query.build(%{email: "email@example.com"}) - *contains criteria* - add field to @containns_criteria list - pass values list - e.g. Pleroma.User.Query.build(%{ap_id: ["http://ap_id1", "http://ap_id2"]}) """ import Ecto.Query import Pleroma.Web.AdminAPI.Search, only: [not_empty_string: 1] alias Pleroma.User @type criteria :: %{ query: String.t(), tags: [String.t()], name: String.t(), email: String.t(), local: boolean(), external: boolean(), active: boolean(), deactivated: boolean(), is_admin: boolean(), is_moderator: boolean(), super_users: boolean(), followers: User.t(), friends: User.t(), recipients_from_activity: [String.t()], nickname: [String.t()], ap_id: [String.t()] } | %{} @ilike_criteria [:nickname, :name, :query] @equal_criteria [:email] @role_criteria [:is_admin, :is_moderator] @contains_criteria [:ap_id, :nickname] @spec build(criteria()) :: Query.t() def build(query \\ base_query(), criteria) do prepare_query(query, criteria) end @spec paginate(Ecto.Query.t(), pos_integer(), pos_integer()) :: Ecto.Query.t() def paginate(query, page, page_size) do from(u in query, limit: ^page_size, offset: ^((page - 1) * page_size) ) end defp base_query do from(u in User) end defp prepare_query(query, criteria) do Enum.reduce(criteria, query, &compose_query/2) end defp compose_query({key, value}, query) when key in @ilike_criteria and not_empty_string(value) do # hack for :query key key = if key == :query, do: :nickname, else: key where(query, [u], ilike(field(u, ^key), ^"%#{value}%")) end defp compose_query({key, value}, query) when key in @equal_criteria and not_empty_string(value) do where(query, [u], ^[{key, value}]) end defp compose_query({key, values}, query) when key in @contains_criteria and is_list(values) do where(query, [u], field(u, ^key) in ^values) end defp compose_query({:tags, tags}, query) when is_list(tags) and length(tags) > 0 do Enum.reduce(tags, query, &prepare_tag_criteria/2) end defp compose_query({key, _}, query) when key in @role_criteria do where(query, [u], fragment("(?->? @> 'true')", u.info, ^to_string(key))) end defp compose_query({:super_users, _}, query) do where( query, [u], fragment("?->'is_admin' @> 'true' OR ?->'is_moderator' @> 'true'", u.info, u.info) ) end defp compose_query({:local, _}, query), do: location_query(query, true) defp compose_query({:external, _}, query), do: location_query(query, false) defp compose_query({:active, _}, query) do where(query, [u], fragment("not (?->'deactivated' @> 'true')", u.info)) |> where([u], not is_nil(u.nickname)) end defp compose_query({:deactivated, false}, query) do User.restrict_deactivated(query) end defp compose_query({:deactivated, true}, query) do where(query, [u], fragment("?->'deactivated' @> 'true'", u.info)) |> where([u], not is_nil(u.nickname)) end defp compose_query({:followers, %User{id: id, follower_address: follower_address}}, query) do where(query, [u], fragment("? <@ ?", ^[follower_address], u.following)) |> where([u], u.id != ^id) end defp compose_query({:friends, %User{id: id, following: following}}, query) do where(query, [u], u.follower_address in ^following) |> where([u], u.id != ^id) end defp compose_query({:recipients_from_activity, to}, query) do where(query, [u], u.ap_id in ^to or fragment("? && ?", u.following, ^to)) end defp compose_query(_unsupported_param, query), do: query defp prepare_tag_criteria(tag, query) do or_where(query, [u], fragment("? = any(?)", ^tag, u.tags)) end defp location_query(query, local) do where(query, [u], u.local == ^local) |> where([u], not is_nil(u.nickname)) end end