Released Broadtail 0.0.7 about a week ago. This included some restyling of the job list on the home page, which now includes a progress bar updated using web-sockets (no need for page refreshes anymore).

For the frontend, the Websocket APIs that come from the browser are used. There’s not much to it — it’s managed by a Stimulus controller which sets up the websocket and listen for updates. The updates are then pushed as custom events to the main window, which the Stimulus controllers used to update the progress bar are listening out for. This allows for a single Stimulus controller to manage the websocket connection and make use of the window as a message bus.

Working out the layers of the progress bar took me a bit of time, as I wanted to make sure the text in the progress bar itself was readable as the progress bar filled. I settled in a HTML tree that looked like the following:

<div class="progressbar">
  <!-- The filled in layer, at z-index: 10 -->
  <div class="complete">
    <span class="label">45% complete</span>

  <!-- The unfilled layer -->
  <span class="label">45% complete</span>

As you can see, there’s a base layer and a filled in layer that overlaps it. Both of these layers have a progress label that contain the same status message. As the .complete layer fills in, it will hide the unfilled layer and label. The various CSS properties used to get this effect can be found here.

The backend was a little easier. There is a nice websocket library for Go which handles the connection upgrades and provides a nice API for posting JSON messages. Once the upgrade is complete, a goroutine servicing the connection will just start listening to status updates from the jobs manager and forward these messages as JSON text messages.

Although this works, it’s not perfect. One small issue is that updates will not reconnect if there is an error. I imagine that it’s just a matter of listening out for the relevant events and retrying, but I’ll need to learn more about how this actually works. Another thing is that the styling of the progress bar relies of fixed widths. If I get around to reskinning the style of the entire application, that might be the time to address this.

The second thing this release has is a simple integration with Plex. If this integration is configured, Broadtail will now send a request to Plex to rescan the library for new files, meaning that there’s no real need to wait for the schedule rescan to occur before the videos are available in the app. This simply uses Plex’s API, but it needs the Plex token, which can be found using this method.

Anyway, that’s it for this version. I’m working on re-engineering how favourites work for the next release. Since this is still in early development, I won’t be putting in any logic to migrate the existing favourites, so just be weary that you may loose that data. If that’s going to be a problem, feel free to let me know.