Extract opengraph/oembed into separate module

lib/pleroma/web/ostatus/metadata.ex

+defmodule Pleroma.Web.Metadata do
+  alias Phoenix.HTML
+  alias Pleroma.{Web, Formatter}
+  alias Pleroma.{User, Activity}
+  alias Pleroma.Web.MediaProxy
+
+  def build_tags(activity, user, url) do
+    Enum.concat([
+      if(meta_enabled?(:opengraph), do: opengraph_tags(activity, user), else: []),
+      if(meta_enabled?(:oembed), do: oembed_links(url), else: [])
+    ])
+    |> Enum.map(&to_tag/1)
+    |> Enum.map(&HTML.safe_to_string/1)
+    |> Enum.join("\n")
+  end
+
+  def meta_enabled?(type) do
+    config = Pleroma.Config.get(:metadata, [])
+    Keyword.get(config, type, false)
+  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
+
+  defp oembed_links(url) do
+    Enum.map(["xml", "json"], fn format ->
+      href = HTML.raw(oembed_path(url, format))
+      { :link, [ type: ["application/#{format}+oembed"], href: href, rel: 'alternate'], [] }
+    end)
+  end
+
+  defp opengraph_tags(activity, user) do
+    with image = User.avatar_url(user) |> MediaProxy.url(),
+         truncated_content = Formatter.truncate(activity.data["object"]["content"]),
+         domain = Pleroma.Config.get([:instance, :domain], "UNKNOWN_DOMAIN") do
+      [
+        {:meta,
+          [
+            property: "og:title",
+            content: "#{user.name} (@#{user.nickname}@#{domain}) post ##{activity.id}"
+          ], []},
+        {:meta, [property: "og:url", content: activity.data["id"]], []},
+        {:meta, [property: "og:description", content: truncated_content],
+          []},
+        {:meta, [property: "og:image", content: image], []},
+        {:meta, [property: "og:image:width", content: 120], []},
+        {:meta, [property: "og:image:height", content: 120], []},
+        {:meta, [property: "twitter:card", content: "summary"], []}
+      ]
+    end
+  end
+
+  defp oembed_path(url, format) do
+    query = URI.encode_query(%{url: url, format: format})
+    "#{Web.base_url()}/oembed?#{query}"
+  end
+end
\ No newline at end of file

lib/pleroma/web/ostatus/ostatus.ex

@@ -7,10 +7,9 @@ defmodule Pleroma.Web.OStatus do
 
   alias Pleroma.{Repo, User, Web, Object, Activity, Formatter}
   alias Pleroma.Web.ActivityPub.ActivityPub
-  alias Pleroma.Web.{WebFinger, Websub, MediaProxy}
+  alias Pleroma.Web.{WebFinger, Websub}
   alias Pleroma.Web.OStatus.{FollowHandler, UnfollowHandler, NoteHandler, DeleteHandler}
   alias Pleroma.Web.ActivityPub.Transmogrifier
-  alias Phoenix.HTML
 
   def is_representable?(%Activity{data: data}) do
     object = Object.normalize(data["object"])
@@ -27,61 +26,6 @@ defmodule Pleroma.Web.OStatus do
     end
   end
 
-  def metadata(activity, user, url) do
-    Enum.concat([
-      if(meta_enabled?(:opengraph), do: opengraph_tags(activity, user), else: []),
-      if(meta_enabled?(:oembed), do: oembed_links(url), else: [])
-    ])
-    |> Enum.map(&to_tag/1)
-    |> Enum.map(&HTML.safe_to_string/1)
-    |> Enum.join("\n")
-  end
-
-  def meta_enabled?(type) do
-    config = Pleroma.Config.get(:metadata, [])
-    Keyword.get(config, type, false)
-  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 oembed_links(url) do
-    Enum.map(["xml", "json"], fn format ->
-      href = HTML.raw(oembed_path(url, format))
-      { :link, [ type: ["application/#{format}+oembed"], href: href, rel: 'alternate'], [] }
-    end)
-  end
-
-  def opengraph_tags(activity, user) do
-    with image = User.avatar_url(user) |> MediaProxy.url(),
-         truncated_content = Formatter.truncate(activity.data["object"]["content"]),
-         domain = Pleroma.Config.get([:instance, :domain], "UNKNOWN_DOMAIN") do
-      [
-        {:meta,
-          [
-            property: "og:title",
-            content: "#{user.name} (@#{user.nickname}@#{domain}) post ##{activity.id}"
-          ], []},
-        {:meta, [property: "og:url", content: activity.data["id"]], []},
-        {:meta, [property: "og:description", content: truncated_content],
-          []},
-        {:meta, [property: "og:image", content: image], []},
-        {:meta, [property: "og:image:width", content: 120], []},
-        {:meta, [property: "og:image:height", content: 120], []},
-        {:meta, [property: "twitter:card", content: "summary"], []}
-      ]
-    end
-  end
-
   def feed_path(user) do
     "#{user.ap_id}/feed.atom"
   end
@@ -98,11 +42,6 @@ defmodule Pleroma.Web.OStatus do
     "#{Web.base_url()}/ostatus_subscribe?acct={uri}"
   end
 
-  def oembed_path(url, format) do
-    query = URI.encode_query(%{url: url, format: format})
-    "#{Web.base_url()}/oembed?#{query}"
-  end
-
   def handle_incoming(xml_string) do
     with doc when doc != :error <- parse_document(xml_string) do
       entries = :xmerl_xpath.string('//entry', doc)

lib/pleroma/web/ostatus/ostatus_controller.ex

@@ -4,7 +4,7 @@ defmodule Pleroma.Web.OStatus.OStatusController do
   alias Pleroma.{User, Activity, Object}
   alias Pleroma.Web.OStatus.{FeedRepresenter, ActivityRepresenter}
   alias Pleroma.Repo
-  alias Pleroma.Web.{OStatus, Federator}
+  alias Pleroma.Web.{OStatus, Federator, Metadata}
   alias Pleroma.Web.XML
   alias Pleroma.Web.ActivityPub.ObjectView
   alias Pleroma.Web.ActivityPub.ActivityPubController
@@ -153,8 +153,8 @@ defmodule Pleroma.Web.OStatus.OStatusController do
 
   defp serve_static_with_meta(conn, activity, user) do
     {:ok, index_content } = File.read(Application.app_dir(:pleroma, "priv/static/index.html"))
-    links = OStatus.metadata(activity, user, request_url(conn))
-    response = String.replace(index_content, "<!--server-generated-meta-->", links)
+    tags = Metadata.build_tags(activity, user, request_url(conn))
+    response = String.replace(index_content, "<!--server-generated-meta-->", tags)
     conn
     |> put_resp_content_type("text/html")
     |> send_resp(200, response)