1 files changed, 54 insertions, 0 deletions
diff --git a/lib/pleroma/web/metadata.ex b/lib/pleroma/web/metadata.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.Metadata do
+  alias Phoenix.HTML
+
+  def build_tags(params) do
+    providers = [
+      Pleroma.Web.Metadata.Providers.RelMe,
+      Pleroma.Web.Metadata.Providers.RestrictIndexing
+      | activated_providers()
+    ]
+
+    Enum.reduce(providers, "", fn parser, acc ->
+      rendered_html =
+        params
+        |> parser.build_tags()
+        |> Enum.map(&to_tag/1)
+        |> Enum.map(&HTML.safe_to_string/1)
+        |> Enum.join()
+
+      acc <> rendered_html
+    end)
+  end
+
+  def to_tag(data) do
+    with {name, attrs, _content = []} <- data do
+      HTML.Tag.tag(name, attrs)
+    else
+      {name, attrs, content} ->
+        HTML.Tag.content_tag(name, content, attrs)
+
+      _ ->
+        raise ArgumentError, message: "make_tag invalid args"
+    end
+  end
+
+  def activity_nsfw?(%{data: %{"sensitive" => sensitive}}) do
+    Pleroma.Config.get([__MODULE__, :unfurl_nsfw], false) == false and sensitive
+  end
+
+  def activity_nsfw?(_) do
+    false
+  end
+
+  defp activated_providers do
+    unless Pleroma.Config.restrict_unauthenticated_access?(:activities, :local) do
+      [Pleroma.Web.Metadata.Providers.Feed | Pleroma.Config.get([__MODULE__, :providers], [])]
+    else
+      []
+    end
+  end
+end