[Enhancement] Show currently executing jobs on homepage (#250)

* [WIP] Added PoC job table

* [WIP] hooked up tasks table with real data

* Added reload on websocket command

* Hooked it all up to a websocket

lib/pinchflat/application.ex

@@ -24,7 +24,7 @@ defmodule Pinchflat.Application do
       PinchflatWeb.Endpoint
     ]
 
-    :ok = Oban.Telemetry.attach_default_logger()
+    attach_oban_telemetry()
     Logger.add_handlers(:pinchflat)
 
     # See https://hexdocs.pm/elixir/Supervisor.html
@@ -40,4 +40,11 @@ defmodule Pinchflat.Application do
     PinchflatWeb.Endpoint.config_change(changed, removed)
     :ok
   end
+
+  defp attach_oban_telemetry do
+    events = [[:oban, :job, :start], [:oban, :job, :stop], [:oban, :job, :exception]]
+
+    :ok = Oban.Telemetry.attach_default_logger()
+    :telemetry.attach_many("job-telemetry-broadcast", events, &PinchflatWeb.Telemetry.job_state_change_broadcast/4, [])
+  end
 end

lib/pinchflat/downloading/media_download_worker.ex

@@ -4,7 +4,7 @@ defmodule Pinchflat.Downloading.MediaDownloadWorker do
   use Oban.Worker,
     queue: :media_fetching,
     unique: [period: :infinity, states: [:available, :scheduled, :retryable, :executing]],
-    tags: ["media_item", "media_fetching"]
+    tags: ["media_item", "media_fetching", "show_in_dashboard"]
 
   require Logger
 

lib/pinchflat/downloading/media_quality_upgrade_worker.ex

@@ -4,7 +4,7 @@ defmodule Pinchflat.Downloading.MediaQualityUpgradeWorker do
   use Oban.Worker,
     queue: :media_fetching,
     unique: [period: :infinity, states: [:available, :scheduled, :retryable, :executing]],
-    tags: ["media_item", "media_fetching"]
+    tags: ["media_item", "media_fetching", "show_in_dashboard"]
 
   require Logger
 

lib/pinchflat/fast_indexing/fast_indexing_worker.ex

@@ -4,7 +4,7 @@ defmodule Pinchflat.FastIndexing.FastIndexingWorker do
   use Oban.Worker,
     queue: :fast_indexing,
     unique: [period: :infinity, states: [:available, :scheduled, :retryable]],
-    tags: ["media_source", "fast_indexing"]
+    tags: ["media_source", "fast_indexing", "show_in_dashboard"]
 
   require Logger
 

lib/pinchflat/metadata/source_metadata_storage_worker.ex

@@ -3,7 +3,7 @@ defmodule Pinchflat.Metadata.SourceMetadataStorageWorker do
 
   use Oban.Worker,
     queue: :remote_metadata,
-    tags: ["media_source", "source_metadata", "remote_metadata"],
+    tags: ["media_source", "source_metadata", "remote_metadata", "show_in_dashboard"],
     max_attempts: 3
 
   require Logger

lib/pinchflat/slow_indexing/media_collection_indexing_worker.ex

@@ -4,7 +4,7 @@ defmodule Pinchflat.SlowIndexing.MediaCollectionIndexingWorker do
   use Oban.Worker,
     queue: :media_collection_indexing,
     unique: [period: :infinity, states: [:available, :scheduled, :retryable]],
-    tags: ["media_source", "media_collection_indexing"]
+    tags: ["media_source", "media_collection_indexing", "show_in_dashboard"]
 
   require Logger
 

lib/pinchflat/tasks/tasks_query.ex

@@ -0,0 +1,45 @@
+defmodule Pinchflat.Tasks.TasksQuery do
+  @moduledoc """
+  Query helpers for the Tasks context.
+
+  These methods are made to be one-ish liners used
+  to compose queries. Each method should strive to do
+  _one_ thing. These don't need to be tested as
+  they are just building blocks for other functionality
+  which, itself, will be tested.
+  """
+  import Ecto.Query, warn: false
+
+  alias Pinchflat.Tasks.Task
+
+  # This allows the module to be aliased and query methods to be used
+  # all in one go
+  # usage: use Pinchflat.Tasks.TasksQuery
+  defmacro __using__(_opts) do
+    quote do
+      import Ecto.Query, warn: false
+
+      alias unquote(__MODULE__)
+    end
+  end
+
+  def new do
+    Task
+  end
+
+  def join_job(query) do
+    query
+    |> join(:left, [t], j in assoc(t, :job))
+    |> preload([t, j], job: j)
+  end
+
+  def in_state(states) when is_list(states) do
+    dynamic([t, j], j.state in ^states)
+  end
+
+  def in_state(state), do: in_state([state])
+
+  def has_tag(tag) do
+    dynamic([t, j], ^tag in j.tags)
+  end
+end