WIP: Fix Twitter Cards
Twitter cards were not passing any useful metadata. A few things were being handled on Twitter's end by trying to match OpenGraph tags with their own, but it wasn't working at all for media. This is an attempt to fix that. Common functions have been pulled out of opengraph and put into utils. Twitter's functionality was entirely replaced with a direct copy of Opengraph's and then modified as needed. Profiles are now represented as Summary Cards Posts with images are now represented as Summart with Large Image Cards Posts with video and audio attachments are represented as Player Cards. This now passes the Twitter Card Validator. Validator and Docs are below https://cards-dev.twitter.com/validator https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/abouts-cards
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Mark Felder
parent
39548c3824
commit
ac7ef0999d
@ -3,12 +3,10 @@
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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alias Pleroma.HTML
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alias Pleroma.Formatter
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alias Pleroma.User
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alias Pleroma.Web.Metadata
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alias Pleroma.Web.MediaProxy
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alias Pleroma.Web.Metadata.Providers.Provider
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alias Pleroma.Web.Metadata.Utils
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@behaviour Provider
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@ -19,7 +17,7 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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user: user
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}) do
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attachments = build_attachments(object)
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scrubbed_content = scrub_html_and_truncate(object)
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scrubbed_content = Utils.scrub_html_and_truncate(object)
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# Zero width space
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content =
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if scrubbed_content != "" and scrubbed_content != "\u200B" do
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@ -44,13 +42,14 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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{:meta,
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[
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property: "og:description",
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content: "#{user_name_string(user)}" <> content
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content: "#{Utils.user_name_string(user)}" <> content
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], []},
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{:meta, [property: "og:type", content: "website"], []}
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] ++
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if attachments == [] or Metadata.activity_nsfw?(object) do
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[
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{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "og:image", content: Utils.attachment_url(User.avatar_url(user))],
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[]},
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{:meta, [property: "og:image:width", content: 150], []},
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{:meta, [property: "og:image:height", content: 150], []}
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]
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@ -61,17 +60,17 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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@impl Provider
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def build_tags(%{user: user}) do
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with truncated_bio = scrub_html_and_truncate(user.bio || "") do
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with truncated_bio = Utils.scrub_html_and_truncate(user.bio || "") do
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[
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{:meta,
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[
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property: "og:title",
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content: user_name_string(user)
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content: Utils.user_name_string(user)
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], []},
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{:meta, [property: "og:url", content: User.profile_url(user)], []},
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{:meta, [property: "og:description", content: truncated_bio], []},
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{:meta, [property: "og:type", content: "website"], []},
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{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "og:image", content: Utils.attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "og:image:width", content: 150], []},
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{:meta, [property: "og:image:height", content: 150], []}
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]
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@ -93,13 +92,14 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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case media_type do
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"audio" ->
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[
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{:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
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{:meta,
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[property: "og:" <> media_type, content: Utils.attachment_url(url["href"])], []}
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| acc
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]
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"image" ->
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[
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{:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])],
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{:meta, [property: "og:" <> media_type, content: Utils.attachment_url(url["href"])],
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[]},
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{:meta, [property: "og:image:width", content: 150], []},
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{:meta, [property: "og:image:height", content: 150], []}
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@ -108,7 +108,8 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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"video" ->
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[
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{:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
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{:meta,
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[property: "og:" <> media_type, content: Utils.attachment_url(url["href"])], []}
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| acc
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]
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@ -120,37 +121,4 @@ defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
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acc ++ rendered_tags
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end)
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end
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defp scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.get_cached_stripped_html_for_object(object, __MODULE__)
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|> Formatter.demojify()
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|> Formatter.truncate()
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end
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defp scrub_html_and_truncate(content) when is_binary(content) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.strip_tags()
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|> Formatter.demojify()
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|> Formatter.truncate()
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end
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defp attachment_url(url) do
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MediaProxy.url(url)
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end
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defp user_name_string(user) do
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"#{user.name} " <>
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if user.local do
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"(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
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else
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"(@#{user.nickname})"
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end
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end
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end
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@ -3,44 +3,120 @@
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
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alias Pleroma.Web.Metadata.Providers.Provider
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alias Pleroma.User
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alias Pleroma.Web.Metadata
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alias Pleroma.Web.Metadata.Providers.Provider
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alias Pleroma.Web.Metadata.Utils
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@behaviour Provider
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@impl Provider
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def build_tags(%{object: object}) do
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if Metadata.activity_nsfw?(object) or object.data["attachment"] == [] do
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build_tags(nil)
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else
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case find_first_acceptable_media_type(object) do
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"image" ->
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[{:meta, [property: "twitter:card", content: "summary_large_image"], []}]
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"audio" ->
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[{:meta, [property: "twitter:card", content: "player"], []}]
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"video" ->
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[{:meta, [property: "twitter:card", content: "player"], []}]
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_ ->
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build_tags(nil)
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def build_tags(%{
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object: object,
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user: user
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}) do
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attachments = build_attachments(object)
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scrubbed_content = Utils.scrub_html_and_truncate(object)
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# Zero width space
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content =
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if scrubbed_content != "" and scrubbed_content != "\u200B" do
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"“" <> scrubbed_content <> "”"
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else
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""
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end
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[
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{:meta,
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[
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property: "twitter:title",
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content: Utils.user_name_string(user)
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], []},
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{:meta,
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[
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property: "twitter:description",
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content: content
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], []}
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] ++
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if attachments == [] or Metadata.activity_nsfw?(object) do
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[
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{:meta,
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[property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "twitter:card", content: "summary_large_image"], []}
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]
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else
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attachments
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end
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end
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end
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@impl Provider
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def build_tags(_) do
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[{:meta, [property: "twitter:card", content: "summary"], []}]
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def build_tags(%{user: user}) do
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with truncated_bio = Utils.scrub_html_and_truncate(user.bio || "") do
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[
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{:meta,
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[
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property: "twitter:title",
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content: Utils.user_name_string(user)
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], []},
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{:meta, [property: "twitter:description", content: truncated_bio], []},
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{:meta, [property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))],
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[]},
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{:meta, [property: "twitter:card", content: "summary"], []}
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]
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end
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end
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def find_first_acceptable_media_type(%{data: %{"attachment" => attachment}}) do
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Enum.find_value(attachment, fn attachment ->
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Enum.find_value(attachment["url"], fn url ->
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Enum.find(["image", "audio", "video"], fn media_type ->
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String.starts_with?(url["mediaType"], media_type)
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defp build_attachments(%{data: %{"attachment" => attachments}}) do
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Enum.reduce(attachments, [], fn attachment, acc ->
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rendered_tags =
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Enum.reduce(attachment["url"], [], fn url, acc ->
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content_type = url["mediaType"]
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media_type =
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Enum.find(["image", "audio", "video"], fn media_type ->
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String.starts_with?(url["mediaType"], media_type)
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end)
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# TODO: Add additional properties to objects when we have the data available.
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case media_type do
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"audio" ->
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[
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{:meta, [property: "twitter:card", content: "player"], []},
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{:meta, [property: "twitter:player", content: Utils.attachment_url(url["href"])],
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[]}
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| acc
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]
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"image" ->
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[
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{:meta, [property: "twitter:card", content: "summary_large_image"], []},
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{:meta,
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[
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property: "twitter:player",
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content:
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Utils.attachment_url(
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Pleroma.Uploaders.Uploader.preview_url(content_type, url["href"])
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)
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], []}
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| acc
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]
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# TODO: Need the true width and height values here or Twitter renders an iFrame with a bad aspect ratio
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"video" ->
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[
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{:meta, [property: "twitter:card", content: "player"], []},
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{:meta, [property: "twitter:player", content: Utils.attachment_url(url["href"])],
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[]},
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{:meta, [property: "twitter:player:width", content: "1280"], []},
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{:meta, [property: "twitter:player:height", content: "720"], []}
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| acc
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]
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_ ->
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acc
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end
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end)
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end)
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acc ++ rendered_tags
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end)
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end
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end
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42
lib/pleroma/web/metadata/utils.ex
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42
lib/pleroma/web/metadata/utils.ex
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@ -0,0 +1,42 @@
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# Pleroma: A lightweight social networking server
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# Copyright \xc2\xa9 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Metadata.Utils do
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alias Pleroma.HTML
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alias Pleroma.Formatter
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alias Pleroma.Web.MediaProxy
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def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.get_cached_stripped_html_for_object(object, __MODULE__)
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|> Formatter.demojify()
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|> Formatter.truncate()
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end
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def scrub_html_and_truncate(content) when is_binary(content) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.strip_tags()
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|> Formatter.demojify()
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|> Formatter.truncate()
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end
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def attachment_url(url) do
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MediaProxy.url(url)
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end
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def user_name_string(user) do
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"#{user.name} " <>
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if user.local do
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"(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
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else
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"(@#{user.nickname})"
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end
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end
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end
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