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# Copyright 2020 Hubert Chathi <hubert@uhoreg.ca>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

defmodule Polyjuice.Client.Endpoint.PostMediaUpload do
  @moduledoc """
  Upload to the media repository.

  https://matrix.org/docs/spec/client_server/latest#post-matrix-media-r0-upload
  """

  @type t :: %__MODULE__{
          filename: String.t(),
          data: binary | {:file, String.t()},
          mimetype: String.t()
        }

  @enforce_keys [:filename, :data, :mimetype]
  defstruct [
    :filename,
    :data,
    mimetype: "application/octet-stream"
  ]

  defimpl Polyjuice.Client.Endpoint.Proto do
    def http_spec(
          %{
            filename: filename,
            data: data,
            mimetype: mimetype
          },
          base_url
        ) do
      e = &URI.encode_www_form/1

      url = %{
        URI.merge(
          base_url,
          "#{Polyjuice.Client.prefix_media_r0()}/upload"
        )
        | query: "filename=#{e.(filename)}"
      }

      %Polyjuice.Client.Endpoint.HttpSpec{
        method: :post,
        headers: [
          {"Accept", "application/json"},
          {"Content-Type", mimetype}
        ],
        url: to_string(url),
        body: data
      }
    end

    def transform_http_result(req, status_code, resp_headers, body) do
      Polyjuice.Client.Endpoint.parse_response(req, status_code, resp_headers, body)
    end
  end

  defimpl Polyjuice.Client.Endpoint.BodyParser do
    def parse(_req, parsed) do
      {:ok, Map.get(parsed, "content_uri")}
    end
  end
end