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mobilizon/lib/federation/activity_stream/converter/picture.ex

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defmodule Mobilizon.Federation.ActivityStream.Converter.Picture do
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@moduledoc """
Picture converter.
This module allows to convert events from ActivityStream format to our own
internal one, and back.
"""
alias Mobilizon.Media
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alias Mobilizon.Media.Picture, as: PictureModel
alias Mobilizon.Web.Upload
@http_options [
ssl: [{:versions, [:"tlsv1.2"]}]
]
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@doc """
Convert a picture struct to an ActivityStream representation.
"""
@spec model_to_as(PictureModel.t()) :: map
def model_to_as(%PictureModel{file: file}) do
%{
"type" => "Document",
"mediaType" => file.content_type,
"url" => file.url,
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"name" => file.name
}
end
@doc """
Save picture data from raw data and return AS Link data.
"""
def find_or_create_picture(%{"type" => "Link", "href" => url}, actor_id),
do: find_or_create_picture(url, actor_id)
def find_or_create_picture(
%{"type" => "Document", "url" => picture_url, "name" => name},
actor_id
)
when is_bitstring(picture_url) do
with {:ok, %{body: body}} <- Tesla.get(picture_url, opts: @http_options),
{:ok, %{name: name, url: url, content_type: content_type, size: size}} <-
Upload.store(%{body: body, name: name}),
{:picture_exists, nil} <- {:picture_exists, Media.get_picture_by_url(url)} do
Media.create_picture(%{
"file" => %{
"url" => url,
"name" => name,
"content_type" => content_type,
"size" => size
},
"actor_id" => actor_id
})
else
{:picture_exists, %PictureModel{file: _file} = picture} ->
{:ok, picture}
err ->
err
end
end
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end