Add support for configuring a favicon and embed PWA manifest in server-generated-meta

changelog.d/favicon.add

@@ -0,0 +1 @@
+Add support for configuring favicon, embed favicon and PWA manifest in server-generated meta

config/config.exs

@@ -171,6 +171,7 @@
   short_description: "",
   background_image: "/images/city.jpg",
   instance_thumbnail: "/instance/thumbnail.jpeg",
+  favicon: "/favicon.png",
   limit: 5_000,
   description_limit: 5_000,
   remote_limit: 100_000,
@@ -346,6 +347,8 @@
   icons: [
     %{
       src: "/static/logo.svg",
+      sizes: "144x144",
+      purpose: "any",
       type: "image/svg+xml"
     }
   ],

config/description.exs

@@ -987,6 +987,12 @@
           "The instance thumbnail can be any image that represents your instance and is used by some apps or services when they display information about your instance.",
         suggestions: ["/instance/thumbnail.jpeg"]
       },
+      %{
+        key: :favicon,
+        type: {:string, :image},
+        description: "Favicon of the instance",
+        suggestions: ["/favicon.png"]
+      },
       %{
         key: :show_reactions,
         type: :boolean,

lib/pleroma/web/fallback/redirect_controller.ex

@@ -18,9 +18,22 @@ def api_not_implemented(conn, _params) do
   end
 
   def redirector(conn, _params, code \\ 200) do
+    {:ok, index_content} = File.read(index_file_path())
+
+    title = "<title>#{Pleroma.Config.get([:instance, :name])}</title>"
+    favicon = "<link rel='icon' href='#{Pleroma.Config.get([:instance, :favicon])}'>"
+    manifest = "<link rel='manifest' href='/manifest.json'>"
+
+    response =
+      index_content
+      |> String.replace(
+        "<!--server-generated-meta-->",
+        title <> favicon <> manifest
+      )
+
     conn
     |> put_resp_content_type("text/html")
-    |> send_file(code, index_file_path())
+    |> send_resp(code, response)
   end
 
   def redirector_with_meta(conn, %{"maybe_nickname_or_id" => maybe_nickname_or_id} = params) do
@@ -38,10 +51,15 @@ def redirector_with_meta(conn, params) do
     tags = build_tags(conn, params)
     preloads = preload_data(conn, params)
     title = "<title>#{Pleroma.Config.get([:instance, :name])}</title>"
+    favicon = "<link rel='icon' href='#{Pleroma.Config.get([:instance, :favicon])}'>"
+    manifest = "<link rel='manifest' href='/manifest.json'>"
 
     response =
       index_content
-      |> String.replace("<!--server-generated-meta-->", tags <> preloads <> title)
+      |> String.replace(
+        "<!--server-generated-meta-->",
+        tags <> preloads <> title <> favicon <> manifest
+      )
 
     conn
     |> put_resp_content_type("text/html")
@@ -56,10 +74,12 @@ def redirector_with_preload(conn, params) do
     {:ok, index_content} = File.read(index_file_path())
     preloads = preload_data(conn, params)
     title = "<title>#{Pleroma.Config.get([:instance, :name])}</title>"
+    favicon = "<link rel='icon' href='#{Pleroma.Config.get([:instance, :favicon])}'>"
+    manifest = "<link rel='manifest' href='/manifest.json'>"
 
     response =
       index_content
-      |> String.replace("<!--server-generated-meta-->", preloads <> title)
+      |> String.replace("<!--server-generated-meta-->", preloads <> title <> favicon <> manifest)
 
     conn
     |> put_resp_content_type("text/html")