Insert local links for remote actors in FE

2020-05-24 22:50:40 -04:00
4 changed files with 59 additions and 2 deletions
--- a/assets/css/clacks.scss
+++ b/assets/css/clacks.scss
@ -157,6 +157,10 @@ ul.notifications-list {

 		a {
 			text-decoration: underline;
+
+			&.local-actor-link {
+				text-decoration: none;
+			}
 		}
 	}
 }
--- a/lib/clacks_web/templates/frontend/_action_status.html.eex
+++ b/lib/clacks_web/templates/frontend/_action_status.html.eex
@ -31,7 +31,7 @@
    </p>
  </div>
  <div class="status-content">
-    <%= raw(@original_note["content"]) %>
+    <%= render_status_content(@original_activity) %>
  </div>
  <div class="status-actions">
    <a href="<%= Routes.frontend_path(@conn, :reply, @original_activity.id) %>">Reply</a>
--- a/lib/clacks_web/templates/frontend/_status.html.eex
+++ b/lib/clacks_web/templates/frontend/_status.html.eex
@ -16,7 +16,11 @@
    </p>
  </div>
  <div class="status-content e-content">
+    <%= unless is_nil(@conn.assigns[:user]) do %>
+      <%= render_status_content(@status) %>
+    <% else %>
      <%= raw(@note["content"]) %>
+    <% end %>
  </div>
  <%= unless is_nil(@conn.assigns[:user]) do %>
    <div class="status-actions">
--- a/lib/clacks_web/views/frontend_view.ex
+++ b/lib/clacks_web/views/frontend_view.ex
@ -3,6 +3,7 @@ defmodule ClacksWeb.FrontendView do
  alias Clacks.{Actor, Activity, Repo, Notification}
  alias ClacksWeb.Router.Helpers, as: Routes
  alias ClacksWeb.Endpoint
+  require Logger

  @spec display_username(actor :: Actor.t()) :: String.t()

@ -126,4 +127,52 @@ defmodule ClacksWeb.FrontendView do
  end

  defp mentions_for_replying_to(_), do: ""
+
+  @spec render_status_content(activity :: Activity.t()) :: String.t()
+  defp render_status_content(%Activity{
+         data: %{
+           "type" => "Create",
+           "object" => %{"type" => "Note", "content" => content} = note
+         }
+       }) do
+    with %{"tag" => tags} <- note,
+         {:ok, tree} <- Floki.parse_fragment(content) do
+      tree
+      |> Floki.traverse_and_update(fn
+        {"a", attrs, _children} = orig_tree ->
+          {"href", href} = Enum.find(attrs, fn {name, _} -> name == "href" end)
+
+          has_matching_tag =
+            Enum.any?(tags, fn
+              %{"type" => "Mention", "href" => ^href} -> true
+              _ -> false
+            end)
+
+          with true <- has_matching_tag,
+               %Actor{local: false} = actor <- Actor.get_cached_by_ap_id(href) do
+            {
+              "span",
+              [],
+              [
+                orig_tree,
+                {"a", [{"href", local_actor_link(actor)}, {"class", "local-actor-link"}], ["🔗"]}
+              ]
+            }
+          else
+            _ ->
+              orig_tree
+          end
+
+        tree ->
+          tree
+      end)
+      |> Floki.raw_html()
+      # remove the <html> and </html> from the floki rendered output
+      |> String.slice(6..-8)
+      |> raw()
+    else
+      _ ->
+        content
+    end
+  end
 end