# = content.rb -- Content object for EPUBMaker.
#
# Copyright (c) 2010-2020 Kenshi Muto
#
# This program is free software.
# You can distribute or modify this program under the terms of
# the GNU LGPL, Lesser General Public License version 2.1.
# For details of the GNU LGPL, see the file "COPYING".
#

module ReVIEW
  class EPUBMaker
    # EPUBMaker::Content represents a content data for EPUBMaker.
    # EPUBMaker#contents takes an array of Content.
    class Content
      # ID
      attr_accessor :id
      # File path (will accept #<anchor> suffix also)
      attr_accessor :file
      # MIME type
      attr_accessor :media
      # Title
      attr_accessor :title
      # Header level (from 1)
      attr_accessor :level
      # Show in TOC? nil:No.
      attr_accessor :notoc
      # Properties (EPUB3)
      attr_accessor :properties
      # Chapter type (pre/post/part/nil(body))
      attr_accessor :chaptype

      def inspect
        "<Content id=#{@id}, file=#{@file}, media=#{@media}, title=#{@title}, level=#{@level}, notoc=#{@notoc}, properties=#{@properties}, chaptype=#{@chaptype}>"
      end

      # :call-seq:
      #    initialize(params)
      # Construct Content object by passing named parameters.
      # +params+[:file] is required. Others are optional.
      def initialize(file:, id: nil, media: nil, title: nil, level: nil, notoc: nil, properties: nil, chaptype: nil)
        @id = id
        @file = file
        @media = media
        @title = title
        @level = level
        @notoc = notoc
        @properties = properties || []
        @chaptype = chaptype
        complement
      end

      def ==(other)
        return false unless self.class == other.class

        [self.id, self.file, self.media, self.title, self.level, self.notoc, self.chaptype, self.properties] ==
          [other.id, other.file, other.media, other.title, other.level, other.notoc, other.chaptype, other.properties]
      end

      def coverimage?(imagefile)
        self.media.start_with?('image') && self.file =~ /#{imagefile}\Z/
      end

      def properties_attribute
        if self.properties.size > 0
          %Q( properties="#{self.properties.sort.uniq.join(' ')}")
        else
          ''
        end
      end

      private

      # Complement other parameters by using file parameter.
      def complement
        if @id.nil?
          @id = @file.gsub(%r{[\\/. ]}, '-')
        end
        if /\A[^a-z]/i.match?(@id)
          @id = "rv-#{@id}"
        end
        @id = CGI.escape(@id).gsub('%', '_25_')

        if !@file.nil? && @media.nil?
          @media = @file.sub(/.+\./, '').downcase
        end

        case @media
        when 'xhtml', 'xml', 'html'
          @media = 'application/xhtml+xml'
        when 'css'
          @media = 'text/css'
        when 'jpg', 'jpeg', 'image/jpg'
          @media = 'image/jpeg'
        when 'png'
          @media = 'image/png'
        when 'gif'
          @media = 'image/gif'
        when 'svg', 'image/svg'
          @media = 'image/svg+xml'
        when 'ttf', 'otf'
          @media = 'application/vnd.ms-opentype'
        when 'woff'
          @media = 'application/font-woff'
        end

        if @id.nil? || @file.nil? || @media.nil?
          raise "Type error: #{id}, #{file}, #{media}, #{title}, #{notoc}"
        end
      end
    end
  end
end