Improve opengraph embeds

This brings them more in line with Mastodon.
- Deduplicates display name from the title and content
- Removes arbitrary limits on the size of the embedded image
- Removes angled double quotes from embed descriptions. These would normally just indicate that the content is a quote, but that is already implied by the content being in an embed.

lib/pleroma/web/metadata/providers/open_graph.ex

@@ -19,31 +19,18 @@ def build_tags(%{
       }) do
     attachments = build_attachments(object)
     scrubbed_content = Utils.scrub_html_and_truncate(object)
-    # Zero width space
-    content =
-      if scrubbed_content != "" and scrubbed_content != "\u200B" do
-        ": “" <> scrubbed_content <> "”"
-      else
-        ""
-      end
 
-    # Most previews only show og:title which is inconvenient. Instagram
-    # hacks this by putting the description in the title and making the
-    # description longer prefixed by how many likes and shares the post
-    # has. Here we use the descriptive nickname in the title, and expand
-    # the full account & nickname in the description. We also use the cute^Wevil
-    # smart quotes around the status text like Instagram, too.
     [
       {:meta,
        [
          property: "og:title",
-         content: "#{user.name}" <> content
+         content: Utils.user_name_string(user)
        ], []},
       {:meta, [property: "og:url", content: url], []},
       {:meta,
        [
          property: "og:description",
-         content: "#{Utils.user_name_string(user)}" <> content
+         content: scrubbed_content
        ], []},
       {:meta, [property: "og:type", content: "website"], []}
     ] ++
@@ -95,8 +82,7 @@ defp build_attachments(%{data: %{"attachment" => attachments}}) do
             "image" ->
               [
                 {:meta, [property: "og:image", content: Utils.attachment_url(url["href"])], []},
-                {:meta, [property: "og:image:width", content: 150], []},
+                {:meta, [property: "og:image:alt", content: attachment["name"]], []}
-                {:meta, [property: "og:image:height", content: 150], []}
                 | acc
               ]
 

lib/pleroma/web/metadata/providers/twitter_card.ex

@@ -16,17 +16,10 @@ defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
   def build_tags(%{activity_id: id, object: object, user: user}) do
     attachments = build_attachments(id, object)
     scrubbed_content = Utils.scrub_html_and_truncate(object)
-    # Zero width space
-    content =
-      if scrubbed_content != "" and scrubbed_content != "\u200B" do
-        "“" <> scrubbed_content <> "”"
-      else
-        ""
-      end
 
     [
       title_tag(user),
-      {:meta, [property: "twitter:description", content: content], []}
+      {:meta, [property: "twitter:description", content: scrubbed_content], []}
     ] ++
       if attachments == [] or Metadata.activity_nsfw?(object) do
         [
@@ -91,7 +84,9 @@ defp build_attachments(id, %{data: %{"attachment" => attachments}}) do
                 {:meta, [property: "twitter:card", content: "player"], []},
                 {:meta, [property: "twitter:player", content: player_url(id)], []},
                 {:meta, [property: "twitter:player:width", content: "480"], []},
-                {:meta, [property: "twitter:player:height", content: "480"], []}
+                {:meta, [property: "twitter:player:height", content: "480"], []},
+                {:meta, [property: "twitter:player:stream", content: url["href"]], []},
+                {:meta, [property: "twitter:player:stream:content_type", content: url["mediaType"]], []}
                 | acc
               ]
 

test/pleroma/web/metadata/providers/twitter_card_test.exs

@@ -46,7 +46,7 @@ test "it uses summary twittercard if post has no attachment" do
 
     assert [
              {:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
-             {:meta, [property: "twitter:description", content: "“pleroma in a nutshell”"], []},
+             {:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
              {:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
               []},
              {:meta, [property: "twitter:card", content: "summary"], []}
@@ -91,7 +91,7 @@ test "it renders avatar not attachment if post is nsfw and unfurl_nsfw is disabl
 
     assert [
              {:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
-             {:meta, [property: "twitter:description", content: "“pleroma in a nutshell”"], []},
+             {:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
              {:meta, [property: "twitter:image", content: "http://localhost:4001/images/avi.png"],
               []},
              {:meta, [property: "twitter:card", content: "summary"], []}
@@ -134,7 +134,7 @@ test "it renders supported types of attachments and skips unknown types" do
 
     assert [
              {:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []},
-             {:meta, [property: "twitter:description", content: "“pleroma in a nutshell”"], []},
+             {:meta, [property: "twitter:description", content: "pleroma in a nutshell"], []},
              {:meta, [property: "twitter:card", content: "summary_large_image"], []},
              {:meta, [property: "twitter:player", content: "https://pleroma.gov/tenshi.png"], []},
              {:meta, [property: "twitter:card", content: "player"], []},
@@ -144,7 +144,9 @@ test "it renders supported types of attachments and skips unknown types" do
                 content: Router.Helpers.o_status_url(Endpoint, :notice_player, activity.id)
               ], []},
              {:meta, [property: "twitter:player:width", content: "480"], []},
-             {:meta, [property: "twitter:player:height", content: "480"], []}
+             {:meta, [property: "twitter:player:height", content: "480"], []},
+             {:meta, [property: "twitter:player:stream", content: "https://pleroma.gov/about/juche.webm"], []},
+             {:meta, [property: "twitter:player:stream:content_type", content: "video/webm"], []}
            ] == result
   end
 end