Merge branch 'fix/credo-issues' into 'develop'

[akkoma] / lib / pleroma / web / metadata / opengraph.ex

diff --git a/lib/pleroma/web/metadata/opengraph.ex b/lib/pleroma/web/metadata/opengraph.ex
index b7c5dc64e8e483fb83c55f661409a06976b317f6..190377767ddf4c534cecbcc4be0c2a9759ddfb20 100644 (file)
--- a/lib/pleroma/web/metadata/opengraph.ex
+++ b/lib/pleroma/web/metadata/opengraph.ex
@@ -1,38 +1,62 @@
 # Pleroma: A lightweight social networking server
 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
-  alias Pleroma.Web.Metadata.Providers.Provider
-  alias Pleroma.{HTML, Formatter, User}
+  alias Pleroma.HTML
+  alias Pleroma.Formatter
+  alias Pleroma.User
+  alias Pleroma.Web.Metadata
   alias Pleroma.Web.MediaProxy
+  alias Pleroma.Web.Metadata.Providers.Provider
 
   @behaviour Provider
 
   @impl Provider
-  def build_tags(%{activity: activity, user: user}) do
-    with truncated_content = scrub_html_and_truncate(activity) do
-      attachments = build_attachments(activity)
+  def build_tags(%{
+        object: object,
+        url: url,
+        user: user
+      }) do
+    attachments = build_attachments(object)
+    scrubbed_content = scrub_html_and_truncate(object)
+    # Zero width space
+    content =
+      if scrubbed_content != "" and scrubbed_content != "\u200B" do
+        ": “" <> scrubbed_content <> "”"
+      else
+        ""
+      end
 
-      [
-        {:meta,
-         [
-           property: "og:title",
-           content: user_name_string(user)
-         ], []},
-        {:meta, [property: "og:url", content: activity.data["id"]], []},
-        {:meta, [property: "og:description", content: truncated_content], []}
-      ] ++
-        if attachments == [] or
-             Enum.any?(activity.data["object"]["tag"], fn tag -> tag == "nsfw" end) do
-          [
-            {:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
-            {:meta, [property: "og:image:width", content: 120], []},
-            {:meta, [property: "og:image:height", content: 120], []}
-          ]
-        else
-          attachments
-        end
-    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
+       ], []},
+      {:meta, [property: "og:url", content: url], []},
+      {:meta,
+       [
+         property: "og:description",
+         content: "#{user_name_string(user)}" <> content
+       ], []},
+      {:meta, [property: "og:type", content: "website"], []}
+    ] ++
+      if attachments == [] or Metadata.activity_nsfw?(object) do
+        [
+          {:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
+          {:meta, [property: "og:image:width", content: 150], []},
+          {:meta, [property: "og:image:height", content: 150], []}
+        ]
+      else
+        attachments
+      end
   end
 
   @impl Provider
@@ -46,14 +70,15 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
          ], []},
         {:meta, [property: "og:url", content: User.profile_url(user)], []},
         {:meta, [property: "og:description", content: truncated_bio], []},
+        {:meta, [property: "og:type", content: "website"], []},
         {:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
-        {:meta, [property: "og:image:width", content: 120], []},
-        {:meta, [property: "og:image:height", content: 120], []}
+        {:meta, [property: "og:image:width", content: 150], []},
+        {:meta, [property: "og:image:height", content: 150], []}
       ]
     end
   end
 
-  defp build_attachments(%{data: %{"object" => %{"attachment" => attachments}}} = _activity) do
+  defp build_attachments(%{data: %{"attachment" => attachments}}) do
     Enum.reduce(attachments, [], fn attachment, acc ->
       rendered_tags =
         Enum.reduce(attachment["url"], [], fn url, acc ->
@@ -62,13 +87,33 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
               String.starts_with?(url["mediaType"], media_type)
             end)
 
-          if media_type do
-            [
-              {:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
-              | acc
-            ]
-          else
-            acc
+          # TODO: Add additional properties to objects when we have the data available.
+          # Also, Whatsapp only wants JPEG or PNGs. It seems that if we add a second og:image
+          # object when a Video or GIF is attached it will display that in the Whatsapp Rich Preview.
+          case media_type do
+            "audio" ->
+              [
+                {:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
+                | acc
+              ]
+
+            "image" ->
+              [
+                {:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])],
+                 []},
+                {:meta, [property: "og:image:width", content: 150], []},
+                {:meta, [property: "og:image:height", content: 150], []}
+                | acc
+              ]
+
+            "video" ->
+              [
+                {:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
+                | acc
+              ]
+
+            _ ->
+              acc
           end
         end)
 
@@ -76,12 +121,13 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
     end)
   end
 
-  defp scrub_html_and_truncate(%{data: %{"object" => %{"content" => content}}} = activity) do
+  defp scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
     content
     # html content comes from DB already encoded, decode first and scrub after
     |> HtmlEntities.decode()
     |> String.replace(~r/<br\s?\/?>/, " ")
-    |> HTML.get_cached_stripped_html_for_object(activity, __MODULE__)
+    |> HTML.get_cached_stripped_html_for_object(object, __MODULE__)
+    |> Formatter.demojify()
     |> Formatter.truncate()
   end
 
@@ -91,6 +137,7 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
     |> HtmlEntities.decode()
     |> String.replace(~r/<br\s?\/?>/, " ")
     |> HTML.strip_tags()
+    |> Formatter.demojify()
     |> Formatter.truncate()
   end