feat: Expose Captions on GraphQL (#460)

apps/cf/lib/videos/videos.ex

@@ -76,6 +76,9 @@ defmodule CF.Videos do
   def get_video_by_id(id),
     do: Repo.get(Video, id)
 
+  def get_video_by_hash_id(hash_id),
+    do: Repo.get_by(Video, hash_id: hash_id)
+
   @doc """
   Add a new video.
   Returns video if success or {:error, reason} if something bad append.

apps/cf_graphql/lib/resolvers/videos.ex

@@ -10,6 +10,7 @@ defmodule CF.Graphql.Resolvers.Videos do
 
   alias DB.Repo
   alias DB.Schema.Video
+  alias DB.Schema.VideoCaption
   alias DB.Schema.Statement
 
   # Queries
@@ -22,7 +23,7 @@ defmodule CF.Graphql.Resolvers.Videos do
   end
 
   def get(_root, %{hash_id: id}, _info) do
-    case CF.Videos.get_video_by_id(id) do
+    case CF.Videos.get_video_by_hash_id(id) do
       nil -> {:error, "Video #{id} doesn't exist"}
       video -> {:ok, video}
     end
@@ -66,6 +67,22 @@ defmodule CF.Graphql.Resolvers.Videos do
     end)
   end
 
+  def captions(video, _, _) do
+    batch({__MODULE__, :fetch_captions_by_video_ids}, video.id, fn results ->
+      {:ok,
+       case Map.get(results, video.id) do
+         captions when is_list(captions) ->
+           captions
+           |> List.first(captions)
+           |> Map.get(:parsed)
+           |> Enum.map(&CF.Utils.map_string_keys_to_atom_keys/1)
+
+         nil ->
+           nil
+       end}
+    end)
+  end
+
   def fetch_statements_by_videos_ids(_, videos_ids) do
     Statement
     |> where([s], s.video_id in ^videos_ids)
@@ -74,4 +91,12 @@ defmodule CF.Graphql.Resolvers.Videos do
     |> Repo.all()
     |> Enum.group_by(& &1.video_id)
   end
+
+  def fetch_captions_by_video_ids(_, video_ids) do
+    VideoCaption
+    |> where([c], c.video_id in ^video_ids)
+    |> order_by(desc: :updated_at)
+    |> Repo.all()
+    |> Enum.group_by(& &1.video_id)
+  end
 end

apps/cf_graphql/lib/schema/types.ex

@@ -13,6 +13,7 @@ defmodule CF.Graphql.Schema.Types do
     Subscription,
     UserAction,
     User,
-    Video
+    Video,
+    VideoCaption
   })
 end

apps/cf_graphql/lib/schema/types/video.ex

@@ -50,6 +50,12 @@ defmodule CF.Graphql.Schema.Types.Video do
       complexity(join_complexity())
     end
 
+    @desc "Video captions"
+    field(:captions, list_of(:video_caption)) do
+      resolve(&Resolvers.Videos.captions/3)
+      complexity(join_complexity())
+    end
+
     # Video providers
 
     # YouTube

apps/cf_graphql/lib/schema/types/video_caption.ex

@@ -0,0 +1,18 @@
+defmodule CF.Graphql.Schema.Types.VideoCaption do
+  @moduledoc """
+  A single caption for a video
+  """
+
+  use Absinthe.Schema.Notation
+  use Absinthe.Ecto, repo: DB.Repo
+
+  @desc "Information about the application"
+  object :video_caption do
+    @desc "Caption text"
+    field(:text, non_null(:string))
+    @desc "Caption start time (in seconds)"
+    field(:start, non_null(:float))
+    @desc "Caption duration (in seconds)"
+    field(:duration, non_null(:float))
+  end
+end