debianize-mobilizon/lib/service/metadata/event.ex
Thomas Citharel 6de839dec2
Add JSON-LD schema
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2019-03-04 18:38:30 +01:00

35 lines
1.2 KiB
Elixir

defimpl Mobilizon.Service.Metadata, for: Mobilizon.Events.Event do
alias Phoenix.HTML
alias Phoenix.HTML.Tag
alias Mobilizon.Events.Event
alias MobilizonWeb.JsonLD.ObjectView
def build_tags(%Event{} = event) do
event
|> do_build_tags()
|> Enum.map(&HTML.safe_to_string/1)
|> Enum.reduce("", fn tag, acc -> acc <> tag end)
|> Kernel.<>(build_json_ld_schema(event))
end
# Build OpenGraph & Twitter Tags
defp do_build_tags(%Event{} = event) do
[
Tag.tag(:meta, property: "og:title", content: event.title),
Tag.tag(:meta, property: "og:url", content: event.url),
Tag.tag(:meta, property: "og:description", content: event.description),
Tag.tag(:meta, property: "og:type", content: "website"),
Tag.tag(:meta, property: "og:image", content: event.thumbnail),
Tag.tag(:meta, property: "og:image", content: event.large_image),
Tag.tag(:meta, property: "twitter:card", content: "summary_large_image")
]
end
# Insert JSON-LD schema by hand because Tag.content_tag wants to escape it
defp build_json_ld_schema(%Event{} = event) do
"<script type=\"application\/ld+json\">" <>
(ObjectView.render("event.json", %{event: event})
|> Jason.encode!()) <> "</script>"
end
end