mobilizon/lib/service/metadata/actor.ex

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Elixir
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defimpl Mobilizon.Service.Metadata, for: Mobilizon.Actors.Actor do
alias Phoenix.HTML
alias Phoenix.HTML.Tag
alias Mobilizon.Actors.Actor
alias Mobilizon.Web.JsonLD.ObjectView
import Mobilizon.Service.Metadata.Utils, only: [process_description: 2, default_description: 1]
def build_tags(_actor, _locale \\ "en")
def build_tags(%Actor{type: :Group} = group, locale) do
default_desc = default_description(locale)
group =
Map.update(group, :summary, default_desc, fn summary ->
process_description(summary, locale)
end)
[
Tag.tag(:meta, property: "og:title", content: Actor.display_name_and_username(group)),
Tag.tag(:meta, property: "og:url", content: group.url),
Tag.tag(:meta, property: "og:description", content: group.summary),
Tag.tag(:meta, property: "og:type", content: "profile"),
Tag.tag(:meta, property: "profile:username", content: group.preferred_username),
Tag.tag(:meta, property: "twitter:card", content: "summary")
]
|> maybe_add_avatar(group)
|> add_group_schema(group)
end
def build_tags(%Actor{} = _actor, _locale), do: []
@spec maybe_add_avatar(list(Tag.t()), Actor.t()) :: list(Tag.t())
defp maybe_add_avatar(tags, actor) do
if is_nil(actor.avatar) do
tags
else
tags ++
[Tag.tag(:meta, property: "og:image", content: actor.avatar.url)]
end
end
defp add_group_schema(tags, %Actor{} = group) do
tags ++ [~s{<script type="application/ld+json">#{json(group)}</script>} |> HTML.raw()]
end
# Insert JSON-LD schema by hand because Tag.content_tag wants to escape it
defp json(%Actor{} = group) do
"group.json"
|> ObjectView.render(%{group: group})
|> Jason.encode!()
end
end