# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.User.Search do
alias Pleroma.User
import Ecto.Query
- @similarity_threshold 0.25
@limit 20
def search(query_string, opts \\ []) do
# Strip the beginning @ off if there is a query
query_string = String.trim_leading(query_string, "@")
- with [name, domain] <- String.split(query_string, "@"),
- formatted_domain <- String.replace(domain, ~r/[!-\-|@|[-`|{-~|\/|:|\s]+/, "") do
- name <> "@" <> to_string(:idna.encode(formatted_domain))
+ with [name, domain] <- String.split(query_string, "@") do
+ encoded_domain =
+ domain
+ |> String.replace(~r/[!-\-|@|[-`|{-~|\/|:|\s]+/, "")
+ |> String.to_charlist()
+ |> :idna.encode()
+ |> to_string()
+
+ name <> "@" <> encoded_domain
else
_ -> query_string
end
for_user
|> base_query(following)
|> filter_blocked_user(for_user)
+ |> filter_invisible_users()
|> filter_blocked_domains(for_user)
- |> fts_subquery(query_string)
- |> subquery()
- |> where([u], u.search_rank > @similarity_threshold)
+ |> fts_search(query_string)
+ |> trigram_rank(query_string)
|> boost_search_rank(for_user)
+ |> subquery()
|> order_by(desc: :search_rank)
|> maybe_restrict_local(for_user)
end
- @nickname_regex ~r/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~\-@]+$/
- defp fts_subquery(query, query_string) do
- {nickname_weight, name_weight} =
- if String.match?(query_string, @nickname_regex) do
- {"A", "B"}
- else
- {"B", "A"}
- end
-
+ defp fts_search(query, query_string) do
query_string = to_tsquery(query_string)
from(
u in query,
- select_merge: %{
- search_rank:
- fragment(
- """
- ts_rank_cd((setweight(to_tsvector('simple', ?), ?) || setweight(to_tsvector('simple', ?), ?)), to_tsquery('simple', ?))
- """,
- u.name,
- ^name_weight,
- u.nickname,
- ^nickname_weight,
- ^query_string
- )
- }
+ where:
+ fragment(
+ """
+ (to_tsvector('simple', ?) || to_tsvector('simple', ?)) @@ to_tsquery('simple', ?)
+ """,
+ u.name,
+ u.nickname,
+ ^query_string
+ )
)
end
|> Enum.join(" | ")
end
+ defp trigram_rank(query, query_string) do
+ from(
+ u in query,
+ select_merge: %{
+ search_rank:
+ fragment(
+ "similarity(?, trim(? || ' ' || coalesce(?, '')))",
+ ^query_string,
+ u.nickname,
+ u.name
+ )
+ }
+ )
+ end
+
defp base_query(_user, false), do: User
defp base_query(user, true), do: User.get_followers_query(user)
- defp filter_blocked_user(query, %User{info: %{blocks: blocks}})
- when length(blocks) > 0 do
- from(q in query, where: not (q.ap_id in ^blocks))
+ defp filter_invisible_users(query) do
+ from(q in query, where: q.invisible == false)
+ end
+
+ defp filter_blocked_user(query, %User{} = blocker) do
+ query
+ |> join(:left, [u], b in Pleroma.UserRelationship,
+ as: :blocks,
+ on: b.relationship_type == ^:block and b.source_id == ^blocker.id and u.id == b.target_id
+ )
+ |> where([blocks: b], is_nil(b.target_id))
end
defp filter_blocked_user(query, _), do: query
- defp filter_blocked_domains(query, %User{info: %{domain_blocks: domain_blocks}})
+ defp filter_blocked_domains(query, %User{domain_blocks: domain_blocks})
when length(domain_blocks) > 0 do
domains = Enum.join(domain_blocks, ",")