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Code Issues Projects Releases Wiki Activity

Clean up queries

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This commit is contained in:
Chris McCord 2021-11-10 14:59:13 -05:00
parent ec900a1703
commit bf113e014e
1 changed files with 35 additions and 18 deletions
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53
lib/live_beats/media_library.ex
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@ -94,6 +94,7 @@ defmodule LiveBeats.MediaLibrary do
def play_prev_song(user_id) do def play_prev_song(user_id) do
song = get_current_active_song(user_id) || get_first_song(user_id) song = get_current_active_song(user_id) || get_first_song(user_id)
if prev_song = get_prev_song(song) do if prev_song = get_prev_song(song) do
play_song(prev_song) play_song(prev_song)
end end
@ -101,6 +102,7 @@ defmodule LiveBeats.MediaLibrary do
def play_next_song(user_id) do def play_next_song(user_id) do
song = get_current_active_song(user_id) || get_first_song(user_id) song = get_current_active_song(user_id) || get_first_song(user_id)
if next_song = get_next_song(song) do if next_song = get_next_song(song) do
play_song(next_song) play_song(next_song)
end end
@ -169,7 +171,9 @@ defmodule LiveBeats.MediaLibrary do
end end
def list_songs(limit \\ 100) do def list_songs(limit \\ 100) do
Repo.all(from s in Song, limit: ^limit, order_by: [asc: s.inserted_at, asc: s.id]) from(s in Song, limit: ^limit)
|> order_by_playlist(:asc)
|> Repo.all()
end end
def get_current_active_song(user_id) do def get_current_active_song(user_id) do
@ -193,38 +197,47 @@ defmodule LiveBeats.MediaLibrary do
def get_song!(id), do: Repo.get!(Song, id) def get_song!(id), do: Repo.get!(Song, id)
def get_first_song(user_id) do def get_first_song(user_id) do
Repo.one( from(s in Song,
from s in Song, where: s.user_id == ^user_id,
where: s.user_id == ^user_id, limit: 1
order_by: [asc: s.inserted_at, asc: s.id],
limit: 1
) )
|> order_by_playlist(:asc)
|> Repo.one()
end end
def get_last_song(user_id) do def get_last_song(user_id) do
Repo.one( from(s in Song,
from s in Song, where: s.user_id == ^user_id,
where: s.user_id == ^user_id, order_by: [desc: s.inserted_at, desc: s.id],
order_by: [desc: s.inserted_at, desc: s.id], limit: 1
limit: 1
) )
|> order_by_playlist(:desc)
|> Repo.one()
end end
def get_next_song(%Song{} = song) do def get_next_song(%Song{} = song) do
Repo.one( next =
from s in Song, from(s in Song,
where: s.user_id == ^song.user_id and s.id > ^song.id, where: s.user_id == ^song.user_id and s.id > ^song.id,
order_by: [asc: s.inserted_at, asc: s.id],
limit: 1 limit: 1
) || get_first_song(song.user_id) )
|> order_by_playlist(:asc)
|> Repo.one()
next || get_first_song(song.user_id)
end end
def get_prev_song(%Song{} = song) do def get_prev_song(%Song{} = song) do
Repo.one( prev =
from s in Song, from(s in Song,
where: s.user_id == ^song.user_id and s.id < ^song.id, where: s.user_id == ^song.user_id and s.id < ^song.id,
order_by: [desc: s.inserted_at, desc: s.id], order_by: [desc: s.inserted_at, desc: s.id],
limit: 1 limit: 1
) || get_last_song(song.user_id) )
|> order_by_playlist(:desc)
|> Repo.one()
prev || get_last_song(song.user_id)
end end
def create_song(attrs \\ %{}) do def create_song(attrs \\ %{}) do
@ -264,4 +277,8 @@ defmodule LiveBeats.MediaLibrary do
|> change_song(attrs) |> change_song(attrs)
|> Ecto.Changeset.change(Map.take(prev_changeset.changes, [:duration])) |> Ecto.Changeset.change(Map.take(prev_changeset.changes, [:duration]))
end end
defp order_by_playlist(%Ecto.Query{} = query, direction) when direction in [:asc, :desc] do
from(s in query, order_by: [{^direction, s.inserted_at}, {^direction, s.id}])
end
end end