126 lines
2.5 KiB
Elixir
126 lines
2.5 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, warn: false
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alias Mobilizon.Repo
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alias Mobilizon.Media.Picture
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alias Mobilizon.Media.File
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alias Ecto.Multi
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@doc false
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def data() do
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Dataloader.Ecto.new(Mobilizon.Repo, query: &query/2)
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end
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@doc false
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def query(queryable, _params) do
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queryable
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end
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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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## Examples
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iex> get_picture!(123)
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%Picture{}
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iex> get_picture!(456)
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** (Ecto.NoResultsError)
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"""
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def get_picture!(id), do: Repo.get!(Picture, id)
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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 it's 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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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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|> Repo.one()
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end
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@doc """
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Creates a picture.
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## Examples
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iex> create_picture(%{field: value})
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{:ok, %Picture{}}
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iex> create_picture(%{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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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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## Examples
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iex> update_picture(picture, %{field: new_value})
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{:ok, %Picture{}}
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iex> update_picture(picture, %{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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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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## Examples
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iex> delete_picture(picture)
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{:ok, %Picture{}}
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iex> delete_picture(picture)
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{:error, %Ecto.Changeset{}}
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"""
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def delete_picture(%Picture{} = picture) do
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case 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}}} = _picture ->
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MobilizonWeb.Upload.remove(url)
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end)
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|> Repo.transaction() do
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{:ok, %{picture: %Picture{} = picture}} -> {:ok, picture}
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{:error, :remove, error, _} -> {:error, error}
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end
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end
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@doc """
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Returns an `%Ecto.Changeset{}` for tracking picture changes.
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## Examples
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iex> change_picture(picture)
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%Ecto.Changeset{source: %Picture{}}
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"""
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def change_picture(%Picture{} = picture) do
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Picture.changeset(picture, %{})
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end
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end
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