# frozen_string_literal: true

module Faraday
  # Multipart value used to POST data with a content type.
  class ParamPart
    # @param value [String] Uploaded content as a String.
    # @param content_type [String] String content type of the value.
    # @param content_id [String] Optional String of this value's Content-ID.
    #
    # @return [Faraday::ParamPart]
    def initialize(value, content_type, content_id = nil)
      @value = value
      @content_type = content_type
      @content_id = content_id
    end

    # Converts this value to a form part.
    #
    # @param boundary [String] String multipart boundary that must not exist in
    #   the content exactly.
    # @param key [String] String key name for this value.
    #
    # @return [Faraday::Parts::Part]
    def to_part(boundary, key)
      Faraday::Parts::Part.new(boundary, key, value, headers)
    end

    # Returns a Hash of String key/value pairs.
    #
    # @return [Hash]
    def headers
      {
        'Content-Type' => content_type,
        'Content-ID' => content_id
      }
    end

    # The content to upload.
    #
    # @return [String]
    attr_reader :value

    # The value's content type.
    #
    # @return [String]
    attr_reader :content_type

    # The value's content ID, if given.
    #
    # @return [String, nil]
    attr_reader :content_id
  end
end