#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = AppConfig.rb -- The TaskJuggler III Project Management Software
#
# Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
#               by Chris Schlaeger <chris@linux.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#

require 'rbconfig'

# This class provides central management of configuration data to an
# application. It stores the version number, the name of the application and
# the suite it belongs to. It also holds copyright and license information.
# These infos have to be set in the main module of the application right after
# launch. Then, all other modules can retrieve them from the global instance
# as needed.
class AppConfig

  def initialize
    @@version = '0.0.0'
    @@packageName = 'unnamed'
    @@softwareName = 'unnamed'
    @@packageInfo = 'no info'
    @@appName = 'unnamed'
    @@authors = []
    @@copyright = []
    @@contact = 'not specified'
    @@license = 'no license'
  end

  def AppConfig.version=(version)
    @@version = version
  end

  def AppConfig.version
    @@version
  end

  def AppConfig.packageName=(name)
    @@packageName = name
  end

  def AppConfig.packageName
    @@packageName
  end

  def AppConfig.softwareName=(name)
    @@softwareName = name
  end

  def AppConfig.softwareName
    @@softwareName
  end

  def AppConfig.packageInfo=(info)
    @@packageInfo = info
  end

  def AppConfig.packageInfo
    @@packageInfo
  end

  def AppConfig.appName=(name)
    @@appName = name
  end

  def AppConfig.appName
    @@appName
  end

  def AppConfig.authors=(authors)
    @@authors = authors
  end

  def AppConfig.authors
    @@authors
  end

  def AppConfig.copyright=(copyright)
    @@copyright = copyright
  end

  def AppConfig.copyright
    @@copyright
  end

  def AppConfig.contact=(contact)
    @@contact = contact
  end

  def AppConfig.contact
    @@contact
  end

  def AppConfig.license=(license)
    @@license = license
  end

  def AppConfig.license
    @@license
  end

  def AppConfig.dataDirs(baseDir = 'data')
    dirs = dataSearchDirs(baseDir)
    # Remove non-existing directories from the list again
    dirs.delete_if do |dir|
      !File.exist?(dir.untaint)
    end
    dirs
  end

  def AppConfig.dataSearchDirs(baseDir = 'data')
    rubyLibDir = RbConfig::CONFIG['rubylibdir']
    rubyBaseDir, versionDir = rubyLibDir.scan(/(.*\/)(.*)/)[0]

    dirs = []
    if ENV['TASKJUGGLER_DATA_PATH']
      ENV['TASKJUGGLER_DATA_PATH'].split(':').each do |path|
        dirs << path + "/#{baseDir}/"
      end
    end

    # Find the data dir relative to the source of this file. This should
    # always work.
    dirs << File.join(File.dirname(__FILE__), '..', '..', baseDir)

    # This hopefully works for all setups. Otherwise we have to add more
    # alternative pathes.
    # This one is for RPM based distros like Novell
    dirs << rubyBaseDir + "gems/" + versionDir + '/gems/' \
        + @@packageName + '-' + @@version + "/#{baseDir}/"
    # This one is for Debian based distros
    dirs << rubyLibDir + '/gems/' \
        + @@packageName + '-' + @@version + "/#{baseDir}/"
    # Also look in system share directory
    dirs << '/usr/share/' + @@packageName + "/#{baseDir}/"

    dirs
  end

  def AppConfig.dataFiles(fileName)
    files = []
    dirs = dataDirs
    dirs.each { |d| files << d + fileName if File.exist?(d + fileName) }

    files
  end

  def AppConfig.dataFile(fileName)
    dirs = dataDirs
    dirs.each { |d| return d + fileName if File.exist?(d + fileName) }

    nil
  end

end

