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# This file belongs to TLPM v2.17, TeX Live Package Manager
# Public Domain, P.Jackowski@gust.org.pl

# common procedures; 
# to avoid any stdlib dependencies, we implement a couple of trivial procedures here

# operations on paths

sub dirsep2dirsep
{
      my $path = shift;
      $path =~ s/$reg_dirsep/$chr_dirsep/g;
      return $path;
}

sub split_path
{
      return split(/$reg_dirsep/,$_[0]);
}

sub join_path
{
      return join($chr_dirsep,@_);
}

sub join_list
{
      return join(" ",@_);
}

sub norm_path
{
      map
      {
            chomp;s/\A\s+//;
            #s/$reg_dirsep+/$chr_dirsep/g;
            s/$reg_dirsep\z//g;
            s/\"//g;
            # s/\A\'(.*?)\'\z/$1/;
      } @_;
}

sub make_tree
{
      my $path = shift;
      &norm_path($path);
      $path = &rel2abs($path,$curr_dir);
      return(0) if -d $path;
      my @dirs = &split_path($path);
      $path = '';
      foreach(@dirs)
      {
            $path .= "$_$chr_dirsep";
            unless(-d $path)
            {
                  mkdir($path,0777) or return $error{'cant_mdir'} -> ($path);
            }
      }
      chop $path;
      $message ->("Directory '$path' has been created");
      return(0);
}

sub rel2abs
{
      return $_[0] if $_[0] =~ /$reg_abs/; # is absolute
      my @rel = &split_path($_[0]);
      my @abs = &split_path($_[1]);
      foreach(@rel)
      {
            next if /\A\.\z/;
            if(/\A\.\.\z/)
            {
                  pop(@abs);
                  next;
            }
            push(@abs, $_);
      }
      if(@abs)
      {
            return &join_path(@abs);
      }
      else
      {
            @abs = &split_path($_[1]); # just drive
            return $abs[0];
      }
}

# system command

sub sys
{
      system(&join_list(@_));
      return $?;
}

# messaging

$message_prefix = '% ';
$warning_prefix = '! ';

$_message = sub {return "$message_prefix$_[0]\n"};
$_warning = sub {return "$warning_prefix$_[0]\n"};

# printing to non-existing handle produce 'Bad file descriptor' error;
# we don't have fork so printing to log and terminal needs to be parallel;
# because of somewhat weird STRERR behaviour under windows, everything is
# printed to STDOUT (for tlpmgui) or to file;
# later we throw progress information to STRERR while installing from DVD

sub _mess  {print @_}
sub _logmess {print  @_;print LOG @_}

sub _messf{printf @_}
sub _logmessf {printf @_;printf LOG @_}

sub _message
{
      print STDOUT $_message -> (@_);
}

sub _logmessage
{
      print STDOUT $_message -> (@_);
      print LOG    $_message -> (@_);
}

sub _warning
{
      print STDOUT $_warning -> (@_);
}

sub _logwarning
{
      print STDOUT $_warning -> (@_);
      print LOG    $_warning -> (@_);
};

sub talk2log
{
      $mess    = \&_logmess;
      $messf   = \&_logmessf;
      $message = \&_logmessage;
      $warning = \&_logwarning;
}

sub not2log
{
      $mess    = \&_mess;
      $messf   = \&_messf;
      $message = \&_message;
      $warning = \&_warning;
}

&not2log();

# singular vs plural

sub one_or_more
{
      return $_[0] . ' ' . ($_[0] == 1 ? $_[1] : $_[2]);
}

# ...meybe someday we will use returned error codes
# errcode 0 is ok, 1 is help, negative means something went wrong

%error =
(
 'tl_not_found'   => sub {$warning -> ("TeX Live CD/DVD not found");                 -1},
 'not_tl_source'  => sub {$warning -> ("TeX Live source not found at '$_[0]'");      -1},
 'cant_odir'      => sub {$warning -> ("Can't open directory '$_[0]'");              -2},
 'cant_mdir'      => sub {$warning -> ("Can't create directory '$_[0]'");            -3},
# 'cant_wdir'      => sub {$warning -> ("Directory '$_[0]' is not writable");         ?},
# 'dir_unspec'     => sub {$warning -> ("Target directory unspecified");              ?},
# 'file_not_found' => sub {$warning -> ("Can't find file '$_[0]'");                   ?},
 'miss_dir'       => sub {$warning -> ("Directory '$_[0]' does not exist");          -4},
 'empty_dir'      => sub {$warning -> ("Directory '$_[0]' contains no packages");    -5},
 'wrong_out'      => sub {$warning -> ("Can't write to '$_[0]'");                    -6},
 'wrong_inp'      => sub {$warning -> ("Can't read from '$_[0]'");                   -7},
 'pkg_unspec'     => sub {$warning -> ("Package unspecified");                       -8},
 'pkg_not_inst'   => sub {$warning -> ("Package '$_[0]' is not installed");          -9},
 'pkg_not_found'  => sub {$warning -> ("Can't find package '$_[0]'");                -10},
 'not_found'      => sub {$warning -> ("Can't find '$_[0]'");                        -11},
 'wrong_opt'      => sub {$warning -> ("Unknown option '$_[0]'. Type '$_[1]'");      -12},
 'wrong_cmd'      => sub {$warning -> ("Unknown command '$_[0]'. Type '$_[1]'");     -13},
 'wrong_syn'      => sub {$warning -> ("Incorrect phrase '$_[0]'");                  -14},
 'wrong_reg'      => sub {$warning -> ("Incorrect expression '$_[0]'");              -15},
# 'not_supp'       => sub {$warning -> ("Sorry, $_[0] not yet supported");            -16}
);

# date handling

sub date
{
    my ($min,$hr,$day,$mon,$year) = (localtime)[1,2,3,4,5];
    $year += 1900;
    ($min,$hr,$day,$mon) = map {sprintf "%02d",$_} ($min,$hr,$day,$mon + 1);
    return "$day.$mon.$year, $hr:$min";
}

# quoting

sub doubleq {return '"' . $_[0] . '"'}
sub singleq {return "'" . $_[0] . "'"}

# progress

sub percent
{
      return sprintf("%d%%",$_[0]*100/$_[1]);
}

# -)

sub relax
{
      return; # not zero!
}

1;