class Hiki2md

# File lib/hiki2md.rb, line 4
def convert(lines)
  @outputs = []

  @in_plugin_block = false
  @in_preformatted_block = false
  @in_multiline_preformatted_block = false
  @in_table_block = false
  @in_dl_block = false
  @table_contents = []

  lines.split(/\n/).each do |line|
    # プラグイン
    if @in_plugin_block
      if line =~ /}}\z/
        @in_plugin_block = false
      end
      next
    end

    if line =~ /\A{{/
      next if line =~ /\A{{.+}}\z/
      @in_plugin_block = true
    end

    # 整形済みテキスト（複数行）
    if @in_multiline_preformatted_block
      if line =~ /\A>>>/
        @in_multiline_preformatted_block = false
        @outputs << '```'
        next
      end
      @outputs << line
      next
    end

    if line =~ /\A<<<\s*(.*)/
      @in_multiline_preformatted_block = true
      @outputs << "```#{$1}"
      next
    end

    # 整形済みテキスト
    if @in_preformatted_block
      if line =~ /\A[ \t]+/
        @outputs << line.strip
        next
      else
        @outputs << "```"
        @in_preformatted_block = false
      end
    end

    if line =~ /\A[ \t]+/
      @in_preformatted_block = true
      @outputs << "```\n#{line.strip}"
      next
    end

    # コメント削除
    next if line =~ %r|\A//.*\z|

    # 引用
    line.gsub! /\A""/, '>'

    # リンク
    line.gsub! /\[{2}([^\[\]\|]+?)\|([^\[\]\|]+?)\]{2}/, "[\\1](\\2)"

    # 強調
    line.gsub! /'''(.+)'''/, "**\\1**"
    line.gsub! /''(.+)''/, "*\\1*"

    # 取り消し
    line.gsub! /\=\=(.+)\=\=/, "~~\\1~~"

    # 箇条書き
    line.gsub! /\A[*]{3} ?/, '    - '
    line.gsub! /\A[*]{2} ?/, '  - '
    line.gsub! /\A[*] ?/   , '- '

    line.gsub! /\A[#]{3} ?/  , '    1. '
    line.gsub! /\A[#]{2} ?/  , '  1. '
    line.gsub! /\A[#] ?/     , '1. '

    # 定義リスト
    if line =~ /\A\:(.+)\:(.+)/
      unless @in_dl_block
        @outputs << "<dl>"
      end
      @outputs << "<dt>#{$1}</dt><dd>#{$2}</dd>"
      @in_dl_block = true
      next
    end

    if @in_dl_block
      if line !=~ /\A\:.+\:.+/
        @outputs << "</dl>"
        @in_dl_block = false
      end
    end

    # 見出し
    line.gsub! /\A!{5} ?/ , '##### '
    line.gsub! /\A!{4} ?/ , '#### '
    line.gsub! /\A!{3} ?/ , '### '
    line.gsub! /\A!{2} ?/ , '## '
    line.gsub! /\A! ?/    , '# '

    # 画像
    line.gsub! /\[{2}([^\[\]\|]+?)\]{2}/, "![](\\1)"

    # テーブル
    if line =~ /\A\|\|/
      @in_table_block = true
      @table_contents << line
      next
    end

    if @in_table_block
      @outputs << make_table(@table_contents)
      @in_table_block = false
      @table_contents = []
    end

    @outputs << line
  end

  # ensure
  if @in_table_block
    @outputs << make_table(@table_contents)
    @in_table_block = false
    @table_contents = []
  end

  # ensure
  if @in_preformatted_block
    @outputs << "```"
  end

  # ensure
  if @in_dl_block
    @outputs << "</dl>"
    @in_dl_block = false
  end


  @outputs.join("\n")
end

# File lib/hiki2md.rb, line 155
def make_matrix(contents)
  t_matrix = []
  contents.each do |line|
    row = line.split('||')
    row.shift
    t_matrix << row
  end

  # vertical joint row
  t_matrix.each_with_index do |line, i|
    line.each_with_index do |e, j|
      if e =~ /\^+/
        t_matrix[i][j] = Regexp.last_match.post_match
        Regexp.last_match.size.times do |k|
          t_matrix[i + k + 1] ||= []
          t_matrix[i + k + 1].insert(j, " ")
        end
      end
    end
  end

  # horizontal joint column
  max_col = 0
  t_matrix.each_with_index do |line, i|
    n_col = line.size
    j_col = 0
    line.each do |e|
      if e =~ />+/
        t_matrix[i][j_col] = Regexp.last_match.post_match
        cs = Regexp.last_match.size
        cs.times do
          j_col += 1
          t_matrix[i][j_col] = ""
        end
        n_col += cs
      else
        t_matrix[i][j_col] = e
        j_col += 1
      end
    end
    max_col = n_col if n_col > max_col
  end

  [t_matrix, max_col]
end

# File lib/hiki2md.rb, line 202
def make_table(table_contents)
  contents, max_col = make_matrix(table_contents)

  align_line = "|"
  max_col.times { align_line << ':----|' }
  align_line << "\n"

  table = "\n"
  contents.each_with_index do |line, idx|
    row = "|"
    line.each do |e|
      row << "#{e}|"
    end
    table << row + "\n"

    # insert table alignment after 1st line
    if idx == 0
      table << align_line
    end
  end

  table
end