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#  Original Author:
#               Michael Brailsford  <brailsmt@yahoo.com>
#               aka brailsmt
#  Author:      Giuseppe "Oblomov" Bilotta <giuseppe.bilotta@gmail.com>
#  Purpose:     Provide for humorous larts and praises
#  Original Copyright:
#               2002 Michael Brailsford.  All rights reserved.
#  Copyright:   2006 Giuseppe Bilotta.  All rights reserved.
#  License:     This plugin is licensed under the BSD license.  The terms of
#               which follow.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#
#  1. Redistributions of source code must retain the above copyright notice,
#     this list of conditions and the following disclaimer.
#
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.

class LartPlugin < Plugin

  def initialize
    @larts = Array.new
    @praises = Array.new
    @lartfile = ""
    @praisefile = ""
    @changed = false
    super
  end

  def set_language(lang)
    save

    # We may be on an old installation, so on the first run read non-language-specific larts
    unless defined?(@oldlart)
      @oldlart = "#{@bot.botclass}/lart/larts"
      @oldpraise = "#{@bot.botclass}/lart/praise"
    end

    @lartfile.replace "#{@bot.botclass}/lart/larts-#{lang}"
    @praisefile.replace "#{@bot.botclass}/lart/praises-#{lang}"
    @larts.clear
    @praises.clear
    if File.exists? @lartfile
      IO.foreach(@lartfile) { |line|
        @larts << line.chomp
      }
    elsif File.exists? @oldlart
      IO.foreach(@oldlart) { |line|
        @larts << line.chomp
      }
    end
    if File.exists? @praisefile
      IO.foreach(@praisefile) { |line|
        @praises << line.chomp
      }
    elsif File.exists? @oldpraise
      IO.foreach(@oldpraise) { |line|
        @praises << line.chomp
      }
    end
    @changed = false
  end

  def save
    return unless @changed
    Dir.mkdir("#{@bot.botclass}/lart") if not FileTest.directory? "#{@bot.botclass}/lart"
    # TODO implement safe saving here too
    Utils.safe_save(@lartfile) { |file|
      file.puts @larts
    }
    Utils.safe_save(@praisefile) { |file|
      file.puts @praises
    }
    @changed = false
  end

  def help(plugin, topic="")
    "Lart: The lart plugin allows you to lart/praise someone in the channel. You can also add new larts and new praises as well as delete them. For the curious, LART is an acronym for Luser Attitude Readjustment Tool. Usage: lart <who> [<reason>] -- larts <who> for <reason>. praise <who> [<reason>] -- praises <who> for <reason>. [add|rm][lart|praise] -- Add or remove a lart or praise."
  end

  def handle_lart(m, params)
    lart = @larts[get_msg_idx(@larts.length)]
    if not lart
      m.reply "I dunno any larts"
      return
    end
    who = params[:who].to_s
    reason = params[:why]
    if who == @bot.nick
      who = m.sourcenick
      reason = "for trying to make me lart myself"
    end
    lart = replace_who lart, who
    lart << " #{reason}" unless reason.empty?

    m.act lart
  end

  def handle_praise(m, params)
    praise = @praises[get_msg_idx(@praises.length)]
    if not praise
      m.reply "I dunno any praises"
      return
    end
    who = params[:who].to_s
    reason = params[:why]
    if who == m.sourcenick
      params[:why] = "for praising himself"
      handle_lart(m, params)
      return
    end
    praise = replace_who praise, who
    praise << " #{reason}" unless reason.empty?

    m.act praise
  end

  def handle_addlart(m, params)
    @larts << params[:lart]
    @changed = true
    m.okay
  end

  def handle_rmlart(m, params)
    @larts.delete params[:lart]
    @changed = true
    m.okay
  end

  def handle_addpraise(m, params)
    @praises << params[:praise]
    @changed = true
    m.okay
  end

  def handle_rmpraise(m, params)
    @praises.delete params[:praise]
    @changed = true
    m.okay
  end

  #  The following are utils for larts/praises
  def replace_who(msg, nick)
    msg.gsub(/<who>/i, "#{nick}")
  end

  def get_msg_idx(max)
    idx = rand(max)
  end

end

plugin = LartPlugin.new

plugin.map "lart *who [*why]", :requirements => { :why => /(?:for|because)\s+.*/ }, :action => :handle_lart
plugin.map "praise *who [*why]", :requirements => { :why => /(?:for|because)\s+.*/ }, :action => :handle_praise

plugin.map "addlart *lart", :action => :handle_addlart
plugin.map "addpraise *praise", :action => :handle_addpraise

plugin.map "rmlart *lart", :action => :handle_rmlart
plugin.map "rmpraise *praise", :action => :handle_rmpraise