# -*- coding: utf-8; -*-
#
# class IOBase
#  base of IO class
#
require 'fileutils'
require 'tdiary/style' # XXX can't auto loading TDiary::Style subclasses

module TDiary
	module IO
		class Base
			def initialize( tdiary )
				@tdiary = tdiary
				@data_path = @tdiary.conf.data_path if @tdiary.conf.data_path
				load_styles
			end

			def calendar
				raise StandardError, 'not implemented'
			end

			def transaction(date)
				raise StandardError, 'not implemented'
			end

			def diary_factory(date, title, body, style_name = 'tDiary')
				style(style_name.downcase).new(date, title, body)
			end

			def cache_dir
				raise StandardError, 'not implemented'
			end

			def cache_path
				@_cache_path ||= cache_dir.untaint
				FileUtils.mkdir_p(@_cache_path)
				@_cache_path
			end

			def load_styles
				@styles = {}
				paths = @tdiary.conf.options['style.path'] ||
					[TDiary::PATH, TDiary.server_root].map {|base| "#{base}/tdiary/style" }
				[paths].flatten.uniq.each do |path|
					path = path.sub(/\/+$/, '').untaint
					Dir.glob("#{path}/*.rb") {|style_file| require style_file.untaint }
				end
				TDiary::Style.constants(false).each do |name|
					prefix = name.slice(/\A(.*)Diary\z/, 1)
					if prefix && /\A(Base|Categorizable|Uncategorizable)\z/ !~ prefix
						klass = TDiary::Style.const_get(name)
						klass.send(:include, TDiary::Style::BaseDiary)
						klass.send(:include, TDiary::Style::CategorizableDiary)
						section_class_name = "#{prefix}Section"
						if TDiary::Style.const_defined?(section_class_name)
							TDiary::Style.const_get(section_class_name).send(:include, TDiary::Style::BaseSection)
						end
						@styles[prefix.downcase] = klass
					end
				end
			end

			def style(s)
				unless @styles
					raise BadStyleError, "styles are not loaded"
				end
				r = @styles[s.downcase]
				unless r
					raise BadStyleError, "bad style: #{s}"
				end
				r
			end
		end
	end
end

# Local Variables:
# mode: ruby
# indent-tabs-mode: t
# tab-width: 3
# ruby-indent-level: 3
# End:
# vim: ts=3