akkoma/lib/pleroma/web/ostatus/metadata.ex

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No EOL
2.1 KiB
Elixir

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