module Fc2

# File lib/fc2.rb, line 30
def self.all_clear
  FileUtils.rm_r(cache_dir, secure: true) if File.exist? cache_dir
end

# File lib/fc2.rb, line 23
def self.fetch(key: caller.first, expires_in: 300)
  key = Digest::MD5.hexdigest(key)
  path = File.expand_path(key, cache_dir)
  return Marshal.load(File.read(path)) if use_cache?(path, expires_in)
  dump(path, yield)
end

# File lib/fc2.rb, line 7
def self.included(base)
  base.extend(ClassMethods)
end

# File lib/fc2.rb, line 36
def self.cache_dir
  File.expand_path("org.yoshiori.fc2", Dir.tmpdir)
end

# File lib/fc2.rb, line 44
def self.dump(path, obj)
  FileUtils.mkdir_p(cache_dir) unless File.exist? cache_dir
  File.open(path, "w") { |f| f.write(Marshal.dump(obj)) }
  obj
end

# File lib/fc2.rb, line 50
def self.paths
  @paths ||= []
end

# File lib/fc2.rb, line 40
def self.use_cache?(path, expires_in)
  File.exist?(path) && (Time.now - File::Stat.new(path).mtime) <= expires_in
end