total rebaseHEADmaster

1 files changed, 165 insertions, 0 deletions

diff --git a/lib/pleroma/search/database_search.ex b/lib/pleroma/search/database_search.ex
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+++ b/lib/pleroma/search/database_search.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Search.DatabaseSearch do
+  alias Pleroma.Activity
+  alias Pleroma.Config
+  alias Pleroma.Object.Fetcher
+  alias Pleroma.Pagination
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.Visibility
+
+  require Pleroma.Constants
+
+  import Ecto.Query
+
+  @behaviour Pleroma.Search.SearchBackend
+
+  @impl true
+  def search(user, search_query, options \\ []) do
+    index_type = if 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)
+
+    try do
+      Activity
+      |> Activity.with_preloaded_object()
+      |> Activity.restrict_deactivated_users()
+      |> restrict_public(user)
+      |> query_with(index_type, search_query, :websearch)
+      |> maybe_restrict_local(user)
+      |> 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)
+    rescue
+      _ -> maybe_fetch([], user, search_query)
+    end
+  end
+
+  @impl true
+  def add_to_index(_activity), do: :ok
+
+  @impl true
+  def remove_from_index(_object), do: :ok
+
+  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, user) when not is_nil(user) do
+    intended_recipients = [
+      Pleroma.Constants.as_public(),
+      Pleroma.Web.ActivityPub.Utils.as_local_public()
+    ]
+
+    from([a, o] in q,
+      where: fragment("?->>'type' = 'Create'", a.data),
+      where: fragment("? && ?", ^intended_recipients, a.recipients)
+    )
+  end
+
+  defp restrict_public(q, _user) do
+    from([a, o] in q,
+      where: fragment("?->>'type' = 'Create'", a.data),
+      where: ^Pleroma.Constants.as_public() in a.recipients
+    )
+  end
+
+  defp query_with(q, :gin, search_query, :plain) do
+    %{rows: [[tsc]]} =
+      Ecto.Adapters.SQL.query!(
+        Pleroma.Repo,
+        "select current_setting('default_text_search_config')::regconfig::oid;"
+      )
+
+    from([a, o] in q,
+      where:
+        fragment(
+          "to_tsvector(?::oid::regconfig, ?->>'content') @@ plainto_tsquery(?)",
+          ^tsc,
+          o.data,
+          ^search_query
+        )
+    )
+  end
+
+  defp query_with(q, :gin, search_query, :websearch) do
+    %{rows: [[tsc]]} =
+      Ecto.Adapters.SQL.query!(
+        Pleroma.Repo,
+        "select current_setting('default_text_search_config')::regconfig::oid;"
+      )
+
+    from([a, o] in q,
+      where:
+        fragment(
+          "to_tsvector(?::oid::regconfig, ?->>'content') @@ websearch_to_tsquery(?)",
+          ^tsc,
+          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: [fragment("? <=> now()::date", o.inserted_at)]
+    )
+  end
+
+  defp query_with(q, :rum, search_query, :websearch) do
+    from([a, o] in q,
+      where:
+        fragment(
+          "? @@ websearch_to_tsquery(?)",
+          o.fts_content,
+          ^search_query
+        ),
+      order_by: [fragment("? <=> now()::date", o.inserted_at)]
+    )
+  end
+
+  def maybe_restrict_local(q, user) do
+    limit = Config.get([:instance, :limit_to_local_content], :unauthenticated)
+
+    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)
+
+  def 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
+      [activity | activities]
+    else
+      _ -> activities
+    end
+  end
+end