Admin API: GET /api/pleroma/admin/stats to get status count by visibility scope

lib/mix/tasks/pleroma/refresh_counter_cache.ex

@@ -0,0 +1,46 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Mix.Tasks.Pleroma.RefreshCounterCache do
+  @shortdoc "Refreshes counter cache"
+
+  use Mix.Task
+
+  alias Pleroma.Activity
+  alias Pleroma.CounterCache
+  alias Pleroma.Repo
+
+  require Logger
+  import Ecto.Query
+
+  def run([]) do
+    Mix.Pleroma.start_pleroma()
+
+    ["public", "unlisted", "private", "direct"]
+    |> Enum.each(fn visibility ->
+      count = status_visibility_count_query(visibility)
+      name = "status_visibility_#{visibility}"
+      CounterCache.set(name, count)
+      Mix.Pleroma.shell_info("Set #{name} to #{count}")
+    end)
+
+    Mix.Pleroma.shell_info("Done")
+  end
+
+  defp status_visibility_count_query(visibility) do
+    Activity
+    |> where(
+      [a],
+      fragment(
+        "activity_visibility(?, ?, ?) = ?",
+        a.actor,
+        a.recipients,
+        a.data,
+        ^visibility
+      )
+    )
+    |> where([a], fragment("(? ->> 'type'::text) = 'Create'", a.data))
+    |> Repo.aggregate(:count, :id, timeout: :timer.minutes(30))
+  end
+end

lib/pleroma/counter_cache.ex

@@ -0,0 +1,41 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.CounterCache do
+  alias Pleroma.CounterCache
+  alias Pleroma.Repo
+  use Ecto.Schema
+  import Ecto.Changeset
+  import Ecto.Query
+
+  schema "counter_cache" do
+    field(:name, :string)
+    field(:count, :integer)
+  end
+
+  def changeset(struct, params) do
+    struct
+    |> cast(params, [:name, :count])
+    |> validate_required([:name])
+    |> unique_constraint(:name)
+  end
+
+  def get_as_map(names) when is_list(names) do
+    CounterCache
+    |> where([cc], cc.name in ^names)
+    |> Repo.all()
+    |> Enum.group_by(& &1.name, & &1.count)
+    |> Map.new(fn {k, v} -> {k, hd(v)} end)
+  end
+
+  def set(name, count) do
+    %CounterCache{}
+    |> changeset(%{"name" => name, "count" => count})
+    |> Repo.insert(
+      on_conflict: [set: [count: count]],
+      returning: true,
+      conflict_target: :name
+    )
+  end
+end

lib/pleroma/stats.ex

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Stats do
   import Ecto.Query
+  alias Pleroma.CounterCache
   alias Pleroma.Repo
   alias Pleroma.User
 
@@ -96,4 +97,21 @@ defmodule Pleroma.Stats do
       }
     }
   end
+
+  def get_status_visibility_count do
+    counter_cache =
+      CounterCache.get_as_map([
+        "status_visibility_public",
+        "status_visibility_private",
+        "status_visibility_unlisted",
+        "status_visibility_direct"
+      ])
+
+    %{
+      public: counter_cache["status_visibility_public"] || 0,
+      unlisted: counter_cache["status_visibility_unlisted"] || 0,
+      private: counter_cache["status_visibility_private"] || 0,
+      direct: counter_cache["status_visibility_direct"] || 0
+    }
+  end
 end

lib/pleroma/web/admin_api/admin_api_controller.ex

@@ -13,6 +13,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   alias Pleroma.ModerationLog
   alias Pleroma.Plugs.OAuthScopesPlug
   alias Pleroma.ReportNote
+  alias Pleroma.Stats
   alias Pleroma.User
   alias Pleroma.UserInviteToken
   alias Pleroma.Web.ActivityPub.ActivityPub
@@ -98,7 +99,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   plug(
     OAuthScopesPlug,
     %{scopes: ["read"], admin: true}
-    when action in [:config_show, :list_log]
+    when action in [:config_show, :list_log, :stats]
   )
 
   plug(
@@ -953,6 +954,13 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     conn |> json("")
   end
 
+  def stats(conn, _) do
+    count = Stats.get_status_visibility_count()
+
+    conn
+    |> json(%{"status_visibility" => count})
+  end
+
   def errors(conn, {:error, :not_found}) do
     conn
     |> put_status(:not_found)

lib/pleroma/web/router.ex

@@ -201,6 +201,7 @@ defmodule Pleroma.Web.Router do
     get("/moderation_log", AdminAPIController, :list_log)
 
     post("/reload_emoji", AdminAPIController, :reload_emoji)
+    get("/stats", AdminAPIController, :stats)
   end
 
   scope "/api/pleroma/emoji", Pleroma.Web.PleromaAPI do