class MiniMime::Db

def self.lookup_by_content_type(content_type)
  @db ||= new
  @db.lookup_by_content_type(content_type)
end

def self.lookup_by_extension(extension)
  @db ||= new
  @db.lookup_by_extension(extension) ||
    @db.lookup_by_extension(extension.downcase)
end

def self.lookup_by_filename(filename)
  extension = File.extname(filename)
  return if extension.empty?
  extension = extension[1..-1]
  lookup_by_extension(extension)
end

def initialize
  @ext_db = RandomAccessDb.new(Configuration.ext_db_path, 0)
  @content_type_db = RandomAccessDb.new(Configuration.content_type_db_path, 1)
end

def lookup_by_content_type(content_type)
  @content_type_db.lookup(content_type)
end

def lookup_by_extension(extension)
  @ext_db.lookup(extension)
end