Initial meilisearch implementation, doesn't delete posts yet

config/config.exs

@@ -847,9 +847,14 @@ config :pleroma, Pleroma.User.Backup,
 
 config :pleroma, ConcurrentLimiter, [
   {Pleroma.Web.RichMedia.Helpers, [max_running: 5, max_waiting: 5]},
-  {Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy, [max_running: 5, max_waiting: 5]}
+  {Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy, [max_running: 5, max_waiting: 5]},
+  {Pleroma.Search, [max_running: 20, max_waiting: 50]}
 ]
 
+config :pleroma, Pleroma.Search, module: Pleroma.Activity.Search
+
+config :pleroma, Pleroma.Search.Meilisearch, url: "http://127.0.0.1:7700/"
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{Mix.env()}.exs"

config/test.exs

@@ -133,6 +133,8 @@ config :pleroma, :side_effects,
   ap_streamer: Pleroma.Web.ActivityPub.ActivityPubMock,
   logger: Pleroma.LoggerMock
 
+config :pleroma, Pleroma.Search, module: Pleroma.Activity.Search
+
 # Reduce recompilation time
 # https://dashbit.co/blog/speeding-up-re-compilation-of-elixir-projects
 config :phoenix, :plug_init_mode, :runtime

lib/mix/tasks/pleroma/search/meilisearch.ex

@@ -0,0 +1,38 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Mix.Tasks.Pleroma.Search.Meilisearch do
+  import Mix.Pleroma
+
+  import Ecto.Query
+
+  def run(["index"]) do
+    start_pleroma()
+
+    endpoint = Pleroma.Config.get([Pleroma.Search.Meilisearch, :url])
+
+    Pleroma.Repo.chunk_stream(
+      from(Pleroma.Object,
+        limit: 200,
+        where: fragment("data->>'type' = 'Note'") and fragment("LENGTH(data->>'source') > 0")
+      ),
+      100,
+      :batches
+    )
+    |> Stream.map(fn objects ->
+      Enum.map(objects, fn object ->
+        data = object.data
+        %{id: object.id, source: data["source"], ap: data["id"]}
+      end)
+    end)
+    |> Stream.each(fn activities ->
+      {:ok, _} =
+        Pleroma.HTTP.post(
+          "#{endpoint}/indexes/objects/documents",
+          Jason.encode!(activities)
+        )
+    end)
+    |> Stream.run()
+  end
+end

lib/pleroma/activity.ex

@@ -370,6 +370,7 @@ defmodule Pleroma.Activity do
   end
 
   defdelegate search(user, query, options \\ []), to: Pleroma.Activity.Search
+  def add_to_index(_activity), do: nil
 
   def direct_conversation_id(activity, for_user) do
     alias Pleroma.Conversation.Participation

lib/pleroma/activity/search.ex

@@ -57,7 +57,7 @@ defmodule Pleroma.Activity.Search do
 
   def maybe_restrict_blocked(query, _), do: query
 
-  defp restrict_public(q) do
+  def restrict_public(q) do
     from([a, o] in q,
       where: fragment("?->>'type' = 'Create'", a.data),
       where: ^Pleroma.Constants.as_public() in a.recipients
@@ -124,7 +124,7 @@ defmodule Pleroma.Activity.Search do
     )
   end
 
-  defp maybe_restrict_local(q, user) do
+  def maybe_restrict_local(q, user) do
     limit = Pleroma.Config.get([:instance, :limit_to_local_content], :unauthenticated)
 
     case {limit, user} do
@@ -137,7 +137,7 @@ defmodule Pleroma.Activity.Search do
 
   defp restrict_local(q), do: where(q, local: true)
 
-  defp maybe_fetch(activities, user, search_query) do
+  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"]),

lib/pleroma/application.ex

@@ -303,7 +303,11 @@ defmodule Pleroma.Application do
   def limiters_setup do
     config = Config.get(ConcurrentLimiter, [])
 
-    [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy]
+    [
+      Pleroma.Web.RichMedia.Helpers,
+      Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy,
+      Pleroma.Search
+    ]
     |> Enum.each(fn module ->
       mod_config = Keyword.get(config, module, [])
 

lib/pleroma/search/meilisearch.ex

@@ -0,0 +1,60 @@
+defmodule Pleroma.Search.Meilisearch do
+  require Logger
+
+  alias Pleroma.Activity
+
+  import Pleroma.Activity.Search
+  import Ecto.Query
+
+  def search(user, query, options \\ []) do
+    limit = Enum.min([Keyword.get(options, :limit), 40])
+    offset = Keyword.get(options, :offset, 0)
+    author = Keyword.get(options, :author)
+
+    endpoint = Pleroma.Config.get([Pleroma.Search.Meilisearch, :url])
+
+    {:ok, result} =
+      Pleroma.HTTP.post(
+        "#{endpoint}/indexes/objects/search",
+        Jason.encode!(%{q: query, offset: offset, limit: limit})
+      )
+
+    hits = Jason.decode!(result.body)["hits"] |> Enum.map(& &1["ap"])
+
+    try do
+      hits
+      |> Activity.create_by_object_ap_id()
+      |> Activity.with_preloaded_object()
+      |> Activity.with_preloaded_object()
+      |> Activity.restrict_deactivated_users()
+      |> maybe_restrict_local(user)
+      |> maybe_restrict_author(author)
+      |> maybe_restrict_blocked(user)
+      |> maybe_fetch(user, query)
+      |> order_by([activity], desc: activity.id)
+      |> Pleroma.Repo.all()
+    rescue
+      _ -> maybe_fetch([], user, query)
+    end
+  end
+
+  def add_to_index(activity) do
+    object = activity.object
+
+    if activity.data["type"] == "Create" and not is_nil(object) and object.data["type"] == "Note" do
+      data = object.data
+
+      endpoint = Pleroma.Config.get([Pleroma.Search.Meilisearch, :url])
+
+      {:ok, result} =
+        Pleroma.HTTP.post(
+          "#{endpoint}/indexes/objects/documents",
+          Jason.encode!([%{id: object.id, source: data["source"], ap: data["id"]}])
+        )
+
+      if not Map.has_key?(Jason.decode!(result.body), "updateId") do
+        Logger.error("Failed to add activity #{activity.id} to index: #{result.body}")
+      end
+    end
+  end
+end

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -136,6 +136,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
         Task.start(fn -> Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity) end)
       end)
 
+      search_module = Pleroma.Config.get([Pleroma.Search, :module])
+
+      ConcurrentLimiter.limit(Pleroma.Search, fn ->
+        Task.start(fn -> search_module.add_to_index(activity) end)
+      end)
+
       {:ok, activity}
     else
       %Activity{} = activity ->

lib/pleroma/web/mastodon_api/controllers/search_controller.ex

@@ -5,7 +5,6 @@
 defmodule Pleroma.Web.MastodonAPI.SearchController do
   use Pleroma.Web, :controller
 
-  alias Pleroma.Activity
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.ControllerHelper
@@ -98,7 +97,9 @@ defmodule Pleroma.Web.MastodonAPI.SearchController do
   end
 
   defp resource_search(_, "statuses", query, options) do
-    statuses = with_fallback(fn -> Activity.search(options[:for_user], query, options) end)
+    search_module = Pleroma.Config.get([Pleroma.Search, :module], Pleroma.Activity)
+
+    statuses = with_fallback(fn -> search_module.search(options[:for_user], query, options) end)
 
     StatusView.render("index.json",
       activities: statuses,