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diff --git a/lib/pleroma/web/metadata.ex b/lib/pleroma/web/metadata.ex
index d859dfd8b..8793fc265 100644
--- a/lib/pleroma/web/metadata.ex
+++ b/lib/pleroma/web/metadata.ex
@@ -1,30 +1,33 @@
+# 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 do
alias Phoenix.HTML
@providers Pleroma.Config.get([__MODULE__, :providers], [])
def build_tags(params) do
Enum.reduce(@providers, "", fn parser, acc ->
rendered_html =
params
|> parser.build_tags()
|> Enum.map(&to_tag/1)
|> Enum.map(&HTML.safe_to_string/1)
|> Enum.join()
acc <> rendered_html
end)
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
end
diff --git a/lib/pleroma/web/metadata/opengraph.ex b/lib/pleroma/web/metadata/opengraph.ex
index f6a1f3023..b7c5dc64e 100644
--- a/lib/pleroma/web/metadata/opengraph.ex
+++ b/lib/pleroma/web/metadata/opengraph.ex
@@ -1,106 +1,109 @@
+# 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.Web.MediaProxy
@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)
[
{: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
end
@impl Provider
def build_tags(%{user: user}) do
with truncated_bio = scrub_html_and_truncate(user.bio || "") do
[
{:meta,
[
property: "og:title",
content: user_name_string(user)
], []},
{:meta, [property: "og:url", content: User.profile_url(user)], []},
{:meta, [property: "og:description", content: truncated_bio], []},
{: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], []}
]
end
end
defp build_attachments(%{data: %{"object" => %{"attachment" => attachments}}} = _activity) do
Enum.reduce(attachments, [], fn attachment, acc ->
rendered_tags =
Enum.reduce(attachment["url"], [], fn url, acc ->
media_type =
Enum.find(["image", "audio", "video"], fn media_type ->
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
end
end)
acc ++ rendered_tags
end)
end
defp scrub_html_and_truncate(%{data: %{"object" => %{"content" => content}}} = activity) 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__)
|> Formatter.truncate()
end
defp scrub_html_and_truncate(content) when is_binary(content) do
content
# html content comes from DB already encoded, decode first and scrub after
|> HtmlEntities.decode()
|> String.replace(~r/<br\s?\/?>/, " ")
|> HTML.strip_tags()
|> Formatter.truncate()
end
defp attachment_url(url) do
MediaProxy.url(url)
end
defp user_name_string(user) do
"#{user.name} " <>
if user.local do
"(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
else
"(@#{user.nickname})"
end
end
end
diff --git a/lib/pleroma/web/metadata/provider.ex b/lib/pleroma/web/metadata/provider.ex
index f64810fad..a39008bcc 100644
--- a/lib/pleroma/web/metadata/provider.ex
+++ b/lib/pleroma/web/metadata/provider.ex
@@ -1,3 +1,6 @@
+# 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.Provider do
@callback build_tags(map()) :: list()
end
diff --git a/lib/pleroma/web/metadata/twitter_card.ex b/lib/pleroma/web/metadata/twitter_card.ex
index 3094e61fd..853776611 100644
--- a/lib/pleroma/web/metadata/twitter_card.ex
+++ b/lib/pleroma/web/metadata/twitter_card.ex
@@ -1,42 +1,45 @@
+# 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.TwitterCard do
alias Pleroma.Web.Metadata.Providers.Provider
@behaviour Provider
@impl Provider
def build_tags(%{activity: activity}) do
if Enum.any?(activity.data["object"]["tag"], fn tag -> tag == "nsfw" end) or
activity.data["object"]["attachment"] == [] do
build_tags(nil)
else
case find_first_acceptable_media_type(activity) do
"image" ->
[{:meta, [property: "twitter:card", content: "summary_large_image"], []}]
"audio" ->
[{:meta, [property: "twitter:card", content: "player"], []}]
"video" ->
[{:meta, [property: "twitter:card", content: "player"], []}]
_ ->
build_tags(nil)
end
end
end
@impl Provider
def build_tags(_) do
[{:meta, [property: "twitter:card", content: "summary"], []}]
end
def find_first_acceptable_media_type(%{data: %{"object" => %{"attachment" => attachment}}}) do
Enum.find_value(attachment, fn attachment ->
Enum.find_value(attachment["url"], fn url ->
Enum.find(["image", "audio", "video"], fn media_type ->
String.starts_with?(url["mediaType"], media_type)
end)
end)
end)
end
end
diff --git a/test/web/metadata/opengraph_test.exs b/test/web/metadata/opengraph_test.exs
new file mode 100644
index 000000000..be3f89364
--- /dev/null
+++ b/test/web/metadata/opengraph_test.exs
@@ -0,0 +1,113 @@
+# 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.OpenGraphTest do
+ use Pleroma.DataCase
+ import Pleroma.Factory
+ alias Pleroma.Web.Metadata.Providers.OpenGraph
+
+ test "it renders all supported types of attachments and skips unknown types" do
+ user = insert(:user)
+
+ note =
+ insert(:note, %{
+ data: %{
+ "actor" => user.ap_id,
+ "tag" => [],
+ "content" => "pleroma in a nutshell",
+ "attachment" => [
+ %{
+ "url" => [
+ %{"mediaType" => "image/png", "href" => "https://pleroma.gov/tenshi.png"}
+ ]
+ },
+ %{
+ "url" => [
+ %{
+ "mediaType" => "application/octet-stream",
+ "href" => "https://pleroma.gov/fqa/badapple.sfc"
+ }
+ ]
+ },
+ %{
+ "url" => [
+ %{"mediaType" => "video/webm", "href" => "https://pleroma.gov/about/juche.webm"}
+ ]
+ },
+ %{
+ "url" => [
+ %{
+ "mediaType" => "audio/basic",
+ "href" => "http://www.gnu.org/music/free-software-song.au"
+ }
+ ]
+ }
+ ]
+ }
+ })
+
+ note_activity =
+ insert(:note_activity, %{
+ data: %{
+ "actor" => note.data["actor"],
+ "to" => note.data["to"],
+ "object" => note.data,
+ "context" => note.data["context"]
+ },
+ actor: note.data["actor"],
+ recipients: note.data["to"]
+ })
+
+ result = OpenGraph.build_tags(%{activity: note_activity, user: user})
+
+ assert Enum.all?(
+ [
+ {:meta, [property: "og:image", content: "https://pleroma.gov/tenshi.png"], []},
+ {:meta,
+ [property: "og:audio", content: "http://www.gnu.org/music/free-software-song.au"],
+ []},
+ {:meta, [property: "og:video", content: "https://pleroma.gov/about/juche.webm"],
+ []}
+ ],
+ fn element -> element in result end
+ )
+ end
+
+ test "it does not render attachments if post is nsfw" do
+ user = insert(:user, avatar: %{"url" => [%{"href" => "https://pleroma.gov/tenshi.png"}]})
+
+ note =
+ insert(:note, %{
+ data: %{
+ "actor" => user.ap_id,
+ "content" => "#cuteposting #nsfw #hambaga",
+ "tag" => ["cuteposting", "nsfw", "hambaga"],
+ "attachment" => [
+ %{
+ "url" => [
+ %{"mediaType" => "image/png", "href" => "https://misskey.microsoft/corndog.png"}
+ ]
+ }
+ ]
+ }
+ })
+
+ note_activity =
+ insert(:note_activity, %{
+ data: %{
+ "actor" => note.data["actor"],
+ "to" => note.data["to"],
+ "object" => note.data,
+ "context" => note.data["context"]
+ },
+ actor: note.data["actor"],
+ recipients: note.data["to"]
+ })
+
+ result = OpenGraph.build_tags(%{activity: note_activity, user: user})
+
+ assert {:meta, [property: "og:image", content: "https://pleroma.gov/tenshi.png"], []} in result
+
+ refute {:meta, [property: "og:image", content: "https://misskey.microsoft/corndog.png"], []} in result
+ end
+end

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