94 lines
2.8 KiB
Elixir
94 lines
2.8 KiB
Elixir
defmodule Mobilizon.Service.Feed do
|
|
@moduledoc """
|
|
Serve Atom Syndication Feeds
|
|
"""
|
|
|
|
alias Mobilizon.Actors
|
|
alias Mobilizon.Actors.Actor
|
|
alias Mobilizon.Events
|
|
alias Mobilizon.Events.Event
|
|
alias Atomex.{Feed, Entry}
|
|
import MobilizonWeb.Gettext
|
|
alias MobilizonWeb.Router.Helpers, as: Routes
|
|
alias MobilizonWeb.Endpoint
|
|
|
|
@version Mix.Project.config()[:version]
|
|
def version(), do: @version
|
|
|
|
@spec create_cache(String.t()) :: {:commit, String.t()} | {:ignore, any()}
|
|
def create_cache("actor_" <> name) do
|
|
with {:ok, res} <- fetch_actor_event_feed(name) do
|
|
{:commit, res}
|
|
else
|
|
err ->
|
|
{:ignore, err}
|
|
end
|
|
end
|
|
|
|
@spec fetch_actor_event_feed(String.t()) :: String.t()
|
|
defp fetch_actor_event_feed(name) do
|
|
with %Actor{} = actor <- Actors.get_local_actor_by_name(name),
|
|
{:ok, events, _count} <- Events.get_public_events_for_actor(actor) do
|
|
{:ok, build_actor_feed(actor, events)}
|
|
else
|
|
err ->
|
|
{:error, err}
|
|
end
|
|
end
|
|
|
|
# Build an atom feed from actor and it's public events
|
|
@spec build_actor_feed(Actor.t(), list()) :: String.t()
|
|
defp build_actor_feed(%Actor{} = actor, events) do
|
|
display_name = Actor.display_name(actor)
|
|
self_url = Routes.feed_url(Endpoint, :actor, actor.preferred_username, "atom") |> URI.decode()
|
|
|
|
# Title uses default instance language
|
|
feed =
|
|
Feed.new(
|
|
self_url,
|
|
DateTime.utc_now(),
|
|
gettext("%{actor}'s public events feed", actor: display_name)
|
|
)
|
|
|> Feed.author(display_name, uri: actor.url)
|
|
|> Feed.link(self_url, rel: "self")
|
|
|> Feed.link(actor.url, rel: "alternate")
|
|
|> Feed.generator("Mobilizon", uri: "https://joinmobilizon.org", version: version())
|
|
|> Feed.entries(Enum.map(events, &get_entry/1))
|
|
|
|
feed = if actor.avatar_url, do: Feed.icon(feed, actor.avatar_url), else: feed
|
|
|
|
feed =
|
|
if actor.banner_url,
|
|
do: Feed.logo(feed, actor.banner_url),
|
|
else: feed
|
|
|
|
feed
|
|
|> Feed.build()
|
|
|> Atomex.generate_document()
|
|
end
|
|
|
|
# Create an entry for the Atom feed
|
|
@spec get_entry(Event.t()) :: any()
|
|
defp get_entry(%Event{} = event) do
|
|
with {:ok, html, []} <- Earmark.as_html(event.description) do
|
|
entry =
|
|
Entry.new(event.url, event.publish_at || event.inserted_at, event.title)
|
|
|> Entry.link(event.url, rel: "alternate", type: "text/html")
|
|
|> Entry.content({:cdata, html}, type: "html")
|
|
|> Entry.published(event.publish_at || event.inserted_at)
|
|
|
|
# Add tags
|
|
entry =
|
|
event.tags
|
|
|> Enum.uniq()
|
|
|> Enum.reduce(entry, fn tag, acc -> Entry.category(acc, tag.slug, label: tag.title) end)
|
|
|
|
Entry.build(entry)
|
|
else
|
|
{:error, _html, error_messages} ->
|
|
require Logger
|
|
Logger.error("Unable to produce HTML for Markdown", details: inspect(error_messages))
|
|
end
|
|
end
|
|
end
|