#encoding: utf-8

require "simple_fs/version"

module SimpleFS

require 'simple_fs/file_pool'
require "sequel"

class FS
	def initialize(fs_path)
		Dir.mkdir fs_path unless Dir.exist? fs_path
		@file_pool = FilePool::Pool.new File.join(fs_path, 'pool')
		@db = create_index_db File.join(fs_path, 'index.db')
	end

	def move(old_path, new_path, optopns = {})
		@db[:index].where(:path => old_path).update(:path => new_path)
	end

	def copy(old_path, new_path, optopns = {})
		@old = @db[:index].where(:path => old_path).first
		@db[:index].insert(:path => new_path, :file_id => @old[:file_id])
	end

	def remove(path, optopns = {})
		@db[:index].where(:path => path).delete
	end

	def create(path, data, optopns = {})
		file_id = @file_pool.puts data
		@db[:index].insert(:path => path, :file_id => file_id)
	end

	private

	def create_index_db db_path
		db = Sequel.sqlite(db_path)
		unless db.table_exists? :index
			db.create_table :index do
				primary_key :id
				String :file_id
				String :path
			end
		end

		return db
	end
end

end