#
# file::    forum_helper.rb
# author::  Jon A. Lambert
# version:: 0.1.0
# date::    1/6/2006
#
# This source code copyright (C) 2006 by Jon A. Lambert
# All rights reserved.
#
# Released under the terms of the TeensyWeb Public License
# See LICENSE file for additional information.
#

module ForumHelper

  def format_post(str)
    s = str

    # Embed ruby
    if s =~ RUBY_CODE_PATTERN
      convertor = Syntax::Convertors::HTML.for_syntax "ruby"
      s.gsub!(RUBY_CODE_PATTERN) {|m|
        convertor.convert($1,true)
      }
    end

    # Embed graph
    if s =~ GRAPH_CODE_PATTERN
      File.open("public/graphs/#{$1}.dot","wb") {|f|
        f.write $2
      }
      `dot -Tcmap -opublic\\graphs\\#{$1}.map -Tpng -opublic\\graphs\\#{$1}.png public\\graphs\\#{$1}.dot`
      s.gsub!(GRAPH_CODE_PATTERN) {|m|
         "<img src=\"/graphs/#{$1}.png\" usemap=\"#{$1}\" /><map id=\"#{$1}\" name=\"#{$1}\">#{`cat public\\graphs\\#{$1}.map`}</map>"
      }
    end

    # save text surrounded by pre tags
    savepre = {}
    saveidx = 0
    s.gsub!(/<pre>.*?<\/pre>/mi) {
      saveidx += 1
      savepre[saveidx] = $&
      "ZZZ#{saveidx}ZZZ"
    }

    # markdown
    # s = BlueCloth.new(s).to_html
    s.gsub!(/\n/, "<br />")

    # Wiki words
    s.gsub!(WIKI_LINK_PATTERN) {|m|
      Page.find_by_name($1) ?
      "<a href='/wiki/show/#{$1}'>#{$1}</a>" :
      "#{$1}<a href='/wiki/edit/#{$1}'>?</a>"
    }

    # restore text from pre tags
    s.gsub!(/ZZZ(\d+?)ZZZ/mi) {
      savepre[$1.to_i]
    }

    s

  end

  def quote_post(replyto)
    str = "#{replyto.user.login} wrote:\n"
    str << replyto.data.gsub(/^.*?$/mi) {"> " + $&}
  end

end