module DigitalOceanInventory

# File lib/digital_ocean_inventory.rb, line 43
def self.build_inventory(config)
  inventory  = Inventory.build config
  collector  = Collector.build config

  collector.call inventory
end

# File lib/digital_ocean_inventory.rb, line 50
def self.cache_inventory(config, json)
  File.open config.cache_file, "w+" do |f|
    f.write json
  end
end

# File lib/digital_ocean_inventory.rb, line 29
def self.cache_valid?(config)
  return false unless File.exists? config.cache_file

  max_age   = config.cache_max_age
  file_stat = File.stat config.cache_file
  cache_age = Time.now.to_i - file_stat.mtime.to_i

  max_age > cache_age
end

# File lib/digital_ocean_inventory.rb, line 10
def self.call(argv)
  config = Config.new

  if cache_valid? config
    json = load_cached config
  else
    inventory  = build_inventory config
    serializer = Serializer.build config

    json = serializer.call inventory

    cache_inventory config, json
  end

  puts json

  json
end

# File lib/digital_ocean_inventory.rb, line 39
def self.load_cached(config)
  File.read config.cache_file
end