Update priv/repo/migrations/20190501125843_add_fts_index_to_objects.exs, priv/repo...

[akkoma] / lib / pleroma / activity / search.ex

diff --git a/lib/pleroma/activity/search.ex b/lib/pleroma/activity/search.ex
index 9ccedcd13397bbe862215b2b2e3ca0b22c6fc846..ed898ba4ff847a79c93c15f6d9b6c7355057d50b 100644 (file)
--- a/lib/pleroma/activity/search.ex
+++ b/lib/pleroma/activity/search.ex
@@ -1,54 +1,104 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Activity.Search do
   alias Pleroma.Activity
   alias Pleroma.Object.Fetcher
-  alias Pleroma.Repo
+  alias Pleroma.Pagination
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Visibility
 
+  require Pleroma.Constants
+
   import Ecto.Query
 
-  def search(user, search_query) do
+  def search(user, search_query, options \\ []) do
     index_type = if Pleroma.Config.get([:database, :rum_enabled]), do: :rum, else: :gin
+    limit = Enum.min([Keyword.get(options, :limit), 40])
+    offset = Keyword.get(options, :offset, 0)
+    author = Keyword.get(options, :author)
+
+    search_function =
+      if :persistent_term.get({Pleroma.Repo, :postgres_version}) >= 11 do
+        :websearch
+      else
+        :plain
+      end
 
     Activity
     |> Activity.with_preloaded_object()
     |> Activity.restrict_deactivated_users()
     |> restrict_public()
-    |> query_with(index_type, search_query)
+    |> query_with(index_type, search_query, search_function)
     |> maybe_restrict_local(user)
-    |> Repo.all()
+    |> maybe_restrict_author(author)
+    |> maybe_restrict_blocked(user)
+    |> Pagination.fetch_paginated(
+      %{"offset" => offset, "limit" => limit, "skip_order" => index_type == :rum},
+      :offset
+    )
     |> maybe_fetch(user, search_query)
   end
 
+  def maybe_restrict_author(query, %User{} = author) do
+    Activity.Queries.by_author(query, author)
+  end
+
+  def maybe_restrict_author(query, _), do: query
+
+  def maybe_restrict_blocked(query, %User{} = user) do
+    Activity.Queries.exclude_authors(query, User.blocked_users_ap_ids(user))
+  end
+
+  def maybe_restrict_blocked(query, _), do: query
+
   defp restrict_public(q) do
     from([a, o] in q,
       where: fragment("?->>'type' = 'Create'", a.data),
-      where: "https://www.w3.org/ns/activitystreams#Public" in a.recipients,
-      limit: 40
+      where: ^Pleroma.Constants.as_public() in a.recipients
+    )
+  end
+
+  defp query_with(q, :gin, search_query, :plain) do
+    from([a, o] in q,
+      where:
+        fragment(
+          "to_tsvector(?->>'content') @@ plainto_tsquery(?)",
+          o.data,
+          ^search_query
+        )
     )
   end
 
-  defp query_with(q, :gin, search_query) do
+  defp query_with(q, :gin, search_query, :websearch) do
     from([a, o] in q,
       where:
         fragment(
-          "to_tsvector('english', ?->>'content') @@ plainto_tsquery('english', ?)",
+          "to_tsvector(?->>'content') @@ websearch_to_tsquery(?)",
           o.data,
           ^search_query
+        )
+    )
+  end
+
+  defp query_with(q, :rum, search_query, :plain) do
+    from([a, o] in q,
+      where:
+        fragment(
+          "? @@ plainto_tsquery(?)",
+          o.fts_content,
+          ^search_query
         ),
-      order_by: [desc: :id]
+      order_by: [fragment("? <=> now()::date", o.inserted_at)]
     )
   end
 
-  defp query_with(q, :rum, search_query) do
+  defp query_with(q, :rum, search_query, :websearch) do
     from([a, o] in q,
       where:
         fragment(
-          "? @@ plainto_tsquery('english', ?)",
+          "? @@ websearch_to_tsquery(?)",
           o.fts_content,
           ^search_query
         ),
@@ -56,24 +106,25 @@ defmodule Pleroma.Activity.Search do
     )
   end
 
-  # users can search everything
-  defp maybe_restrict_local(q, %User{}), do: q
+  defp maybe_restrict_local(q, user) do
+    limit = Pleroma.Config.get([:instance, :limit_to_local_content], :unauthenticated)
 
-  # unauthenticated users can only search local activities
-  defp maybe_restrict_local(q, _) do
-    if Pleroma.Config.get([:instance, :limit_unauthenticated_to_local_content], true) do
-      where(q, local: true)
-    else
-      q
+    case {limit, user} do
+      {:all, _} -> restrict_local(q)
+      {:unauthenticated, %User{}} -> q
+      {:unauthenticated, _} -> restrict_local(q)
+      {false, _} -> q
     end
   end
 
+  defp restrict_local(q), do: where(q, local: true)
+
   defp maybe_fetch(activities, user, search_query) do
     with true <- Regex.match?(~r/https?:/, search_query),
          {:ok, object} <- Fetcher.fetch_object_from_id(search_query),
          %Activity{} = activity <- Activity.get_create_by_object_ap_id(object.data["id"]),
          true <- Visibility.visible_for_user?(activity, user) do
-      activities ++ [activity]
+      [activity | activities]
     else
       _ -> activities
     end