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# 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.build(%{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()],
order_by: term(),
select: term(),
limit: pos_integer()
}
| %{}
@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({:order_by, key}, query) do
order_by(query, [u], field(u, ^key))
end
defp compose_query({:select, keys}, query) do
select(query, [u], ^keys)
end
defp compose_query({:limit, limit}, query) do
limit(query, ^limit)
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

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