Files
bDS2/lib/bds/desktop/deep_link.ex

76 lines
2.2 KiB
Elixir

defmodule BDS.Desktop.DeepLink do
@moduledoc """
Receives OS URL-scheme events for the `bds2://` scheme and routes them to the
shell (spec: script.allium `BlogmarkReceived`).
On macOS the `BDS2.app` bundle registers `bds2://` as a custom URL scheme via
the `CFBundleURLTypes` entry in its `Info.plist` (built by `BDS.MacBundle` /
`mix bds.bundle.macos`). When the browser bookmarklet navigates to
`bds2://new-post?title=&url=`, the OS launches/raises the app and `Desktop.Env`
delivers an `{:open_url, [url]}` event. This GenServer subscribes to those
events and forwards recognised `bds2://` links to the live shell over PubSub,
where `BDS.Blogmark` turns them into draft posts.
The `bds2://` scheme is distinct from the legacy app's `bds://` so the two
installs do not contend for the same registration.
"""
use GenServer
require Logger
alias BDS.CliSync.Watcher
@scheme "bds2://"
def child_spec(opts) do
%{id: __MODULE__, start: {__MODULE__, :start_link, [opts]}}
end
def start_link(opts \\ []) do
GenServer.start_link(__MODULE__, opts, name: Keyword.get(opts, :name, __MODULE__))
end
@impl true
def init(opts) do
pubsub = Keyword.get(opts, :pubsub, BDS.PubSub)
topic = Keyword.get(opts, :topic, Watcher.topic())
subscribe_to_env()
{:ok, %{pubsub: pubsub, topic: topic}}
end
# Desktop.Env delivers OS events as {event_name, args} tuples.
@impl true
def handle_info({:open_url, [url | _rest]}, state) when is_binary(url) do
{:noreply, route(url, state)}
end
def handle_info(_message, state), do: {:noreply, state}
defp route(url, state) do
if String.starts_with?(url, @scheme) do
Phoenix.PubSub.broadcast(state.pubsub, state.topic, {:blogmark_deep_link, url})
else
Logger.debug("ignoring non-bds2 deep link: #{inspect(url)}")
end
state
end
# Desktop.Env is only present when the wx desktop adapter is running. Guard the
# subscribe so the GenServer can still start in headless/test configurations.
defp subscribe_to_env do
if Process.whereis(Desktop.Env) do
try do
Desktop.Env.subscribe()
catch
:exit, _reason -> :ok
end
end
:ok
end
end