« Changelog History


Drab v0.8.3 Release Notes

Release Date: 2018-06-22 // almost 6 years ago

  • This version brings two useful features: presence and ability to subscribe to topics in the runtime.

    ⬆️ Upgrading from =< 0.8.2

    Please ensure you have set :main_phoenix_app in your config.exs. The way how Drab is searching
    for the Phoenix app it is working on, has been changed.

    Subscribe and unsubscribe from external topics in a runtime

    Finally, you are not limited to the compile-time topic you’ve set with broadcasting/1 macro in the
    commander. Now you can subscribe/2 to the external topic, receiving broadcasts sent to it.

    subscribe(socket, same\_action(MyApp.MyController, :index))subscribe(socket, same\_topic("user\_#{user\_id}"))

    Presence

    Conveniences for Phoenix.Presence
    🔧 If configured (it is disabled by default), tracks the user presence on the topic. The following
    example shows the number of connected users, live:

    defmodule MyAppWeb.MyCommander use Drab.Commander broadcasting "global" onconnect :connected ondisconnect :disconnected def connected(socket) do broadcast\_html socket, "#number\_of\_users", Drab.Presence.count\_users(socket) enddef disconnected(\_store, \_session) do topic = same\_topic("global") broadcast\_html topic, "#number\_of\_users", Drab.Presence.count\_users(topic) endend

    0️⃣ By default, presence map key is set as a browser UUID (which is shamelessly stored in the local
    💻 store in the browser), but it may be also any session value. This may be useful, if you have the
    🔧 user_id already in the session, just configure it:

    config :drab, :presence, id: :user\_id

    ⚡️ Updated enable/disable when processing behaviour

    After launching an event from the page, the control (button) is disable until processing stops.
    👍 Now it is even better, as it recognizes previously disabled controls (#146).