class Autostart

# File lib/autostart/autostart.rb, line 276
def self.autostart_kde
  self.new(:kde)
end

# File lib/autostart/autostart.rb, line 33
def initialize(
    what = 'default'
  )
  reset
  autostart_what(what) if what
end

# File lib/autostart/autostart.rb, line 283
def self.run(i = ARGV)
  self.new(i)
end

# File lib/autostart/autostart.rb, line 185
def autostart_kde
  show_header :kde
  # mkdir HSS['KDE_AUTOSTART']
  ensure_that_this_directory_exists KDE_AUTOSTART
  mkdir '~/.kde/share/config/'
  copy '$LINUX/KDE/konsolerc','~/.kde/share/config/'
  ARRAY_SYMLINK_THESE_ENTRIES_FOR_KDE.each {|entry|
    symlink(entry+' $KDE_AUTOSTART')
  }
end

# File lib/autostart/autostart.rb, line 199
def autostart_mate(
    use_these_programs = YAML.load_file(
      '/Users/x/DATA/PROGRAMMING_LANGUAGES/RUBY/src/roebe/lib/roebe/yaml/'\
      'autostart_these_programs.yml'
    )
  )
  show_header :mate
  home_dir = HOME_DIR+'.config/autostart'
  mkdir home_dir
  use_these_programs.each {|this_file|
    Roebe::CreateDesktopFile.new(this_file)
  }
end

# File lib/autostart/autostart.rb, line 234
def autostart_what(i = DEFAULT_INPUT)
  i = DEFAULT_INPUT if i.nil?
  i = i.first if i.is_a? Array # Fetch first entry if it is an Array.
  case i.to_s # case tag
  # ======================================================================= #
  # === autostart help
  # ======================================================================= #
  when /^-?-?help/
    show_help
    exit
  # ======================================================================= #
  # === autostart mate
  # ======================================================================= #
  when /^-?-?mate$/
    autostart_mate
  # ======================================================================= #
  # === autostart xfce
  # ======================================================================= #
  when /^-?-?xfce$/,'default','' # This is the default since August 2013.
    autostart_xfce
  # ======================================================================= #
  # === autostart kde
  # ======================================================================= #
  when /^-?-?kde$/
    autostart_kde
  else
    opn; e 'Not found `'+simp(i)+'` in the list of available entries.'
    opn; e 'It is probably not registered.'
  end
  consider_reporting_missing_entries_to_the_user
end

# File lib/autostart/autostart.rb, line 219
def autostart_xfce(
    i = ARRAY_SYMLINK_THESE_ENTRIES_FOR_XFCE
  )
  show_header :xfce
  # home_dir = '~/.config/autostart'
  home_dir = HOME_DIR+'.config/autostart'
  mkdir home_dir
  i.each {|entry|
    symlink(entry+' '+home_dir)
  }
end

# File lib/autostart/autostart.rb, line 51
def consider_reporting_missing_entries_to_the_user
  unless @array_these_symlinks_were_not_found.empty?
    e; opn; e 'We did find some missing entries. Perhaps you '\
              'may wish to correct these:'
    e
    @array_these_symlinks_were_not_found.each {|entry|
      e simp("  #{entry}")
    }; e
  end
end

# File lib/autostart/autostart.rb, line 88
def copy(from, to)
  from = ConvertGlobalEnv[from] if from.include? '$'
  to   = ConvertGlobalEnv[to]   if to.include? '$'
  from = File.expand_path(from)
  to   = File.expand_path(to)
  FileUtils.copy(from, to)
end

# File lib/autostart/autostart.rb, line 65
def mkdir(i)
  i = File.expand_path(i) if i.include? '~' # If includes ~, use File.expand_path
  FileUtils.mkdir_p(i) unless File.exist?(i)
end

# File lib/autostart/autostart.rb, line 269
def orange(i)
  Colours.orange(i)
end

# File lib/autostart/autostart.rb, line 160
def output_header
  e '=' * 80
end

# File lib/autostart/autostart.rb, line 81
def red
  Colours::RED
end

# File lib/autostart/autostart.rb, line 73
def remove_file(i)
  opn; e red+'Removing file '+sfile(i)+red+' now.' if File.exist?(i)
  File.delete(i) if File.file?(i)
end

# File lib/autostart/autostart.rb, line 43
def reset
  @array_these_symlinks_were_not_found = []
  @be_verbose = true
end

# File lib/autostart/autostart.rb, line 143
def show_header(
    for_this_program = :xfce
  )
  case for_this_program
  when :xfce
    for_this_program = 'XFCE'
  when :kde
    for_this_program = 'KDE'
  end
  output_header
  opn; e "Autostart for #{orange(for_this_program)}."
  output_header
end

# File lib/autostart/autostart.rb, line 167
def show_help
  e 'This class (class Autostart) allows you to "autostart" some '\
    'applications in different DE/WMs.'
  e
  e 'Available autostart actions are:'
  e
  e '  - xfce'
  e '  - kde'
  e '  - mate'
  e
end

# File lib/autostart/autostart.rb, line 102
def symlink(i) # Expects string input.
  real_existing_location, new_location = i.split ' '
  if real_existing_location.include? '$'
    # We solve this very simply without regex.
    last_position = real_existing_location.index('/')
    real_value = ENV[real_existing_location[1, last_position-1]].dup
    real_existing_location = real_value+real_existing_location[last_position..-1]
  end
  if new_location.include? '$'
    new_location = ConvertGlobalEnv.convert new_location
  end
  new_location = File.expand_path(new_location) if new_location.include? '~'
  filename = File.basename(real_existing_location)
  new_location << '/'+filename
  if File.symlink?(new_location)
    readlink = File.readlink(new_location)
    remove_file(readlink) unless File.exist?(readlink)
  end 
  remove_file(new_location) if File.exist? new_location
  if File.exist?(real_existing_location)
    opn; e 'Trying to symlink '+sfile(real_existing_location)+
           ' to '+sfile(new_location)+' now.'
    unless File.exist? new_location
      File.symlink(real_existing_location, new_location)
    else
      opn; e 'Can not symlink because '+sfile(new_location)+' does not exist.'
    end
  else
    if @be_verbose
      opn; e 'Trying to symlink '+sfile(real_existing_location)+
             ' to '+sfile(new_location)
      opn; e 'but the file '+sfile(real_existing_location)+' does not '\
             'exist, thus we skip this action.'
      @array_these_symlinks_were_not_found << real_existing_location
    end
  end
end