module C80Map
  class Setting < ActiveRecord::Base
    mount_uploader :map_image, C80Map::MapImageUploader
    after_save :update_json

    def map_img
      MiniMagick::Image.open(map_image.path)
    end

    protected

    def update_json

      locations_path = Rails.root.join("public", "locations.json")
      locs = File.read(locations_path)
      puts "<update_json> #{ Rails.root.join("public", "locations.json") }"

      locs_hash = JSON.parse(locs)
      locs_hash["mapwidth"] = map_img["width"].to_s
      locs_hash["mapheight"] = map_img["height"].to_s
      locs_hash["img"] = map_image.url.to_s

      File.open(locations_path,'w') do |f|
        f.write(locs_hash.to_json)
      end

    end

  end
end