151 lines
3.8 KiB
Elixir
151 lines
3.8 KiB
Elixir
defmodule Mobilizon.Media do
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@moduledoc """
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The Media context.
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"""
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import Ecto.Query
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alias Ecto.Multi
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Media.{File, Picture}
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alias Mobilizon.Storage.{Page, Repo}
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alias Mobilizon.Users.User
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alias Mobilizon.Web.Upload
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@doc """
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Gets a single picture.
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"""
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@spec get_picture(integer | String.t()) :: Picture.t() | nil
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def get_picture(id), do: Repo.get(Picture, id)
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@doc """
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Gets a single picture.
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Raises `Ecto.NoResultsError` if the picture does not exist.
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"""
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@spec get_picture!(integer | String.t()) :: Picture.t()
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def get_picture!(id), do: Repo.get!(Picture, id)
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@doc """
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Get a picture by its URL.
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"""
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@spec get_picture_by_url(String.t()) :: Picture.t() | nil
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def get_picture_by_url(url) do
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url
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|> picture_by_url_query()
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|> Repo.one()
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end
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@doc """
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List the paginated picture for an actor
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"""
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@spec pictures_for_actor(integer | String.t(), integer | nil, integer | nil) :: Page.t()
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def pictures_for_actor(actor_id, page, limit) do
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actor_id
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|> pictures_for_actor_query()
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|> Page.build_page(page, limit)
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end
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@doc """
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List the paginated picture for user
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"""
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@spec pictures_for_user(integer | String.t(), integer | nil, integer | nil) :: Page.t()
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def pictures_for_user(user_id, page, limit) do
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user_id
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|> pictures_for_user_query()
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|> Page.build_page(page, limit)
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end
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@doc """
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Calculate the sum of media size used by the user
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"""
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@spec media_size_for_actor(integer | String.t()) :: integer()
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def media_size_for_actor(actor_id) do
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actor_id
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|> pictures_for_actor_query()
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|> select([:file])
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|> Repo.all()
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|> Enum.map(& &1.file.size)
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|> Enum.sum()
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end
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@doc """
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Calculate the sum of media size used by the user
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"""
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@spec media_size_for_user(integer | String.t()) :: integer()
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def media_size_for_user(user_id) do
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user_id
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|> pictures_for_user_query()
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|> select([:file])
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|> Repo.all()
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|> Enum.map(& &1.file.size)
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|> Enum.sum()
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end
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@doc """
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Creates a picture.
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"""
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@spec create_picture(map) :: {:ok, Picture.t()} | {:error, Ecto.Changeset.t()}
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def create_picture(attrs \\ %{}) do
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%Picture{}
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|> Picture.changeset(attrs)
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|> Repo.insert()
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end
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@doc """
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Updates a picture.
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"""
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@spec update_picture(Picture.t(), map) :: {:ok, Picture.t()} | {:error, Ecto.Changeset.t()}
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def update_picture(%Picture{} = picture, attrs) do
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picture
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|> Picture.changeset(attrs)
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|> Repo.update()
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end
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@doc """
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Deletes a picture.
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"""
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@spec delete_picture(Picture.t()) :: {:ok, Picture.t()} | {:error, Ecto.Changeset.t()}
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def delete_picture(%Picture{} = picture) do
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transaction =
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Multi.new()
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|> Multi.delete(:picture, picture)
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|> Multi.run(:remove, fn _repo, %{picture: %Picture{file: %File{url: url}}} ->
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Upload.remove(url)
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end)
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|> Repo.transaction()
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case transaction do
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{:ok, %{picture: %Picture{} = picture}} ->
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{:ok, picture}
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{:error, :remove, error, _} ->
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{:error, error}
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end
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end
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@spec picture_by_url_query(String.t()) :: Ecto.Query.t()
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defp picture_by_url_query(url) do
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from(
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p in Picture,
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where: fragment("? @> ?", p.file, ~s|{"url": "#{url}"}|)
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)
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end
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@spec pictures_for_actor_query(integer() | String.t()) :: Ecto.Query.t()
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defp pictures_for_actor_query(actor_id) do
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Picture
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|> join(:inner, [p], a in Actor, on: p.actor_id == a.id)
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|> where([_p, a], a.id == ^actor_id)
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end
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@spec pictures_for_user_query(integer() | String.t()) :: Ecto.Query.t()
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defp pictures_for_user_query(user_id) do
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Picture
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|> join(:inner, [p], a in Actor, on: p.actor_id == a.id)
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|> join(:inner, [_p, a], u in User, on: a.user_id == u.id)
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|> where([_p, _a, u], u.id == ^user_id)
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end
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end
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