mobilizon.chapril.org-mobil.../lib/mobilizon/media.ex
Thomas Citharel e8cabd38d4
Delete files when updating parent identities
Closes #127

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2019-06-07 15:01:10 +02:00

126 lines
2.5 KiB
Elixir

defmodule Mobilizon.Media do
@moduledoc """
The Media context.
"""
import Ecto.Query, warn: false
alias Mobilizon.Repo
alias Mobilizon.Media.Picture
alias Mobilizon.Media.File
alias Ecto.Multi
@doc false
def data() do
Dataloader.Ecto.new(Mobilizon.Repo, query: &query/2)
end
@doc false
def query(queryable, _params) do
queryable
end
@doc """
Gets a single picture.
Raises `Ecto.NoResultsError` if the Picture does not exist.
## Examples
iex> get_picture!(123)
%Picture{}
iex> get_picture!(456)
** (Ecto.NoResultsError)
"""
def get_picture!(id), do: Repo.get!(Picture, id)
def get_picture(id), do: Repo.get(Picture, id)
@doc """
Get a picture by it's URL
"""
@spec get_picture_by_url(String.t()) :: Picture.t() | nil
def get_picture_by_url(url) do
from(
p in Picture,
where: fragment("? @> ?", p.file, ~s|{"url": "#{url}"}|)
)
|> Repo.one()
end
@doc """
Creates a picture.
## Examples
iex> create_picture(%{field: value})
{:ok, %Picture{}}
iex> create_picture(%{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def create_picture(attrs \\ %{}) do
%Picture{}
|> Picture.changeset(attrs)
|> Repo.insert()
end
@doc """
Updates a picture.
## Examples
iex> update_picture(picture, %{field: new_value})
{:ok, %Picture{}}
iex> update_picture(picture, %{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def update_picture(%Picture{} = picture, attrs) do
picture
|> Picture.changeset(attrs)
|> Repo.update()
end
@doc """
Deletes a Picture.
## Examples
iex> delete_picture(picture)
{:ok, %Picture{}}
iex> delete_picture(picture)
{:error, %Ecto.Changeset{}}
"""
def delete_picture(%Picture{} = picture) do
case Multi.new()
|> Multi.delete(:picture, picture)
|> Multi.run(:remove, fn _repo, %{picture: %Picture{file: %File{url: url}}} = _picture ->
MobilizonWeb.Upload.remove(url)
end)
|> Repo.transaction() do
{:ok, %{picture: %Picture{} = picture}} -> {:ok, picture}
{:error, :remove, error, _} -> {:error, error}
end
end
@doc """
Returns an `%Ecto.Changeset{}` for tracking picture changes.
## Examples
iex> change_picture(picture)
%Ecto.Changeset{source: %Picture{}}
"""
def change_picture(%Picture{} = picture) do
Picture.changeset(picture, %{})
end
end