/// <summary>
/// Refreshes all panels which have updated after the provided time.
/// </summary>
/// <param name="lastUpdatedTime"></param>
/// <returns></returns>
private async Task <DateTime> UpdateEntitiesSinceLastUpdate(DateTime lastUpdatedTime)
{
// Get all entities not just the entities we think we want
IEnumerable <Entity> allEntities = await WebRequests.GetData();
if (null != allEntities)
{
// Get all entities which have been updated since the last time we've checked
IEnumerable <Entity> entitiesToUpdate = allEntities.Where(x => x.LastUpdated > lastUpdatedTime).ToList();
if (entitiesToUpdate.Any())
{
// For all entities which need to be updated, get all group entities and check their children to see if the group entity needs to be updated as well
lastUpdatedTime = entitiesToUpdate.Select(x => x.LastUpdated).OrderByDescending(x => x).First();
foreach (Entity group in allEntities.Where(x => x.Attributes.ContainsKey("entity_id")))
{
IEnumerable <string> childrenEntityIds = ParseEntityIdAttribute(group);
if (childrenEntityIds.Any(x => entitiesToUpdate.Any(y => y.EntityId.Equals(x, StringComparison.InvariantCultureIgnoreCase))))
{
if (!entitiesToUpdate.Any(x => x.EntityId == group.EntityId))
{
// Add this group entity which is missing from the update requested list
Telemetry.TrackTrace($"{nameof(UpdateEntitiesSinceLastUpdate)} manually adding group {group.EntityId} to update list.");
entitiesToUpdate = entitiesToUpdate.Union(new List <Entity>()
{
group
});
}
}
}
Telemetry.TrackTrace($"{nameof(UpdateEntitiesSinceLastUpdate)} has updated Entities: {string.Join(", ", entitiesToUpdate.Select(x => x.EntityId).ToList())}");
// Perform the update on the UI thread; don't block
UpdateEntityPanels(entitiesToUpdate, allEntities);
}
}
return(lastUpdatedTime);
}
/// <summary>
/// Queries Home Assistant for state information and then populates the main view with panels to
/// show the state information.
/// </summary>
/// <returns></returns>
private async Task LoadFrame()
{
ScrollViewer scrollViewer = this.FindName("MainScrollView") as ScrollViewer;
scrollViewer.Background = ThemeControl.BackgroundBrush;
IEnumerable <Entity> entities = null;
if (!string.IsNullOrEmpty(SettingsControl.HomeAssistantHostname))
{
entities = await WebRequests.GetData();
}
scrollViewer.Content = CreateViews(entities ?? new List <Entity>());
// By setting a center horizontal aligntment we trim off the edges so that the dead space around
// the left and right edges of the screen will render black. This only works well when there's
// content which wraps the screen else we'll trim the background image as well, so guard against
// null content before applying this setting.
if (null != entities)
{
scrollViewer.HorizontalAlignment = HorizontalAlignment.Center;
}
}
