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diff --git a/lib/pleroma/web/preload/providers/timelines.ex b/lib/pleroma/web/preload/providers/timelines.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Preload.Providers.Timelines do
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.MastodonAPI.StatusView
+  alias Pleroma.Web.Preload.Providers.Provider
+
+  @behaviour Provider
+  @public_url "/api/v1/timelines/public"
+
+  @impl Provider
+  def generate_terms(params) do
+    build_public_tag(%{}, params)
+  end
+
+  def build_public_tag(acc, params) do
+    if Pleroma.Config.restrict_unauthenticated_access?(:timelines, :federated) do
+      acc
+    else
+      Map.put(acc, @public_url, public_timeline(params))
+    end
+  end
+
+  defp public_timeline(%{"path" => ["main", "all"]}), do: get_public_timeline(false)
+
+  defp public_timeline(_params), do: get_public_timeline(true)
+
+  defp get_public_timeline(local_only) do
+    activities =
+      ActivityPub.fetch_public_activities(%{
+        type: ["Create"],
+        local_only: local_only
+      })
+
+    StatusView.render("index.json", activities: activities, for: nil, as: :activity)
+  end
+end