#!/usr/bin/perl
#
# This tool will update a translation file by doing the following:
# - Insert an empty translation when a missing translation is found.
#   The translation will have "<< MISSING >>" right above it to
#   make it easy to find.
# - Show the English translation (in a comment) before a missing translation,
#   making it easier to add the translation.
# - Translations will be reorganized so that they are divided up into
#   the pages that they appear on.
#
# Note: you will lose any comments you put in the translation file
# when using this tool (except for the comments at the very beginning).
#
# Note #2: This will overwrite the existing translation file, so a save
# backup of the translation will be saved with a .bak file extension.
#
# Usage:
#	update_translation.pl [-p plugin] languagefile
#
# Example for main WebCalendar translation:
#	update_translation.pl French.txt
#	   or
#	update_translation.pl French
#
# Example for plugin "tnn" translation:
#	update_translation.pl -p tnn French.txt
#	   or
#	update_translation.pl -p tnn French
#
# Note: this utility should be run from this directory (tools).
#
###########################################################################

$base_dir = "..";
$trans_dir = "../translations";

$base_trans_file = "$trans_dir/English-US.txt";
$plugin = "";

$show_missing = 1; # set to 0 to minimize translation file.
$show_dups = 0; # set to 0 to minimize translation file.
$verbose = 0;

( $this ) = reverse split ( /\//, $0 );

$save_backup = 0;

for ( $i = 0; $i < @ARGV; $i++ ) {
  if ( $ARGV[$i] eq "-p" ) {
    $plugin = $ARGV[++$i];
  } elsif ( $ARGV[$i] eq "-v" ) {
    $verbose++;
  } else {
    $infile = $ARGV[$i];
  }
}

die "Usage: $this [-p plugin] language\n" if ( $infile eq "" );

if ( $plugin ne "" ) {
  $p_trans_dir = "$base_dir/$plugin/translations";
  $p_base_trans_file = "$p_trans_dir/English-US.txt";
  $p_base_dir = "$base_dir/$plugin";
} else {
  $p_trans_dir = $trans_dir;
  $p_base_trans_file = $base_trans_file;
  $p_base_dir = $base_dir;
}

if ( $infile !~ /txt$/ ) {
  $infile .= ".txt";
}
if ( -f "$trans_dir/$infile" || -f "$p_trans_dir/$infile" ) {
  $b_infile = "$trans_dir/$infile";
  $infile = "$p_trans_dir/$infile";
}
#print "infile: $infile\nb_infile: $b_infile\ntrans_dir: $trans_dir\n";

die "Usage: $this [-p plugin] language\n" if ( ! -f $infile );

print "Translation file: $infile\n" if ( $verbose );

# Now load the base translation(s) file (English), so that we can include
# the English translation text above a missing translation in a comment.
open ( F, $base_trans_file ) || die "Error opening $base_trans_file";
print "Reading base translation file: $base_trans_file\n" if ( $verbose );
while ( <F> ) {
  chop;
  s/\r*$//g; # remove annoying CR
  next if ( /^#/ );
  if ( /\s*:\s*/ ) {
    $abbrev = $`;
    $base_trans{$abbrev} = $' if ( $abbrev ne 'charset' );
  }
}
close ( F );
# read in the plugin base translation file
if ( $plugin ne "" ) {
  print "Reading plugin base translation file: $p_base_trans_file\n" if ( $verbose );
  open ( F, $p_base_trans_file ) || die "Error opening $p_base_trans_file";
  while ( <F> ) {
    chop;
    s/\r*$//g; # remove annoying CR
    next if ( /^#/ );
    if ( /\s*:\s*/ ) {
      $abbrev = $`;
      $base_trans{$abbrev} = $';
    }
  }
  close ( F );
}


#
# Now load the translation file we are going to update.
#
$old = "";
if ( -f $infile ) {
  print "Reading current translations from $infile\n" if ( $verbose );
  open ( F, $infile ) || die "Error opening $infile";
  $in_header = 1;
  while ( <F> ) {
    $old .= $_;
    chop;
    s/\r*$//g; # remove annoying CR
    if ( $in_header && /^#/ ) {
      if ( /Translation last (pagified|updated)/ ) {
	# ignore since we will replace this with current date below
      } else {
        $header .= $_ . "\n";
      }
    }
    next if ( /^#/ );
    $in_header = 0;
    if ( /\s*:\s*/ ) {
      $abbrev = $`;
      $trans{$abbrev} = $';
    }
  }
}
if ( $plugin ne "" ) {
  print "Reading current WebCalendar translations from $b_infile\n" if ( $verbose );
  open ( F, $b_infile ) || die "Error opening $b_infile";
  $in_header = 1;
  while ( <F> ) {
    chop;
    s/\r*$//g; # remove annoying CR
    if ( /\s*:\s*/ ) {
      $abbrev = $`;
      $webcaltrans{$abbrev} = $';
    }
  }
}

#
# Save a backup copy of old translation file.
#
if ( $save_backup ) {
  open ( F, ">$infile.bak" ) || die "Error writing $infile.bak";
  print F $old;
  close ( F );
  print "Backup of translation saved in $infile.bak\n";
}


if ( $header !~ /Translation last updated/ ) {
  ( $day, $mon, $year ) = ( localtime ( time() ) )[3,4,5];
  $header .= "# Translation last updated on " .
    sprintf ( "%02d-%02d-%04d", $mon + 1, $day, $year + 1900 ) . "\n";
}

# First get the list of .php files
print "Searching for PHP files in $p_base_dir\n" if ( $verbose );
opendir ( DIR, $p_base_dir ) || die "Error opening $p_base_dir";
@files = grep ( /\.php$/, readdir ( DIR ) );
closedir ( DIR );

if ( -d "$p_base_dir/includes" ) {
  print "Searching for PHP files in $p_base_dir/includes\n" if ( $verbose );
  opendir ( DIR, "$p_base_dir/includes" ) ||
    die "Error opening $p_base_dir/includes";
  @incfiles = grep ( /\.php$/, readdir ( DIR ) );
  closedir ( DIR );
  foreach $f ( @incfiles ) {
    push ( @files, "includes/$f" );
  }
}
if ( -d "$p_base_dir/includes/js" ) {
  print "Searching for PHP files in $p_base_dir/includes/js\n" if ( $verbose );
  opendir ( DIR, "$p_base_dir/includes/js" ) ||
    die "Error opening $p_base_dir/includes/js";
  @incfiles = grep ( /\.php$/, readdir ( DIR ) );
  closedir ( DIR );
  foreach $f ( @incfiles ) {
    push ( @files, "includes/js/$f" );
  }
}
if ( $plugin eq "" ) {
  push ( @files, "tools/send_reminders.php" );
}

#
# Write new translation file.
#
$notfound = 0;
open ( OUT, ">$infile" ) || die "Error writing $infile: ";
print OUT $header;
if ( $plugin eq '' ) {
  if ( defined ( $trans{'charset'} ) ) {
    print OUT 
      "\n\n###############################################\n" .
      "# Specify a charset (will be sent within meta tag for each page)\n#\n" .
      "charset: $trans{'charset'}\n\n";
    $text{'charset'} = 1;
    $foundin{'charset'} = " top of this file";
  } else {
    print OUT "\n# No charset specified (not needed for iso-8859-1)\n" .
      "# \"charset\" is used in a meta tag, " .
      "do not translate \"charset\" here.\n" .
      "# charset:\n\n";
  }
}

foreach $f ( @files ) {
  $pageHeader = "\n\n###############################################\n# Page: $f\n#\n";
  $file = "$p_base_dir/$f";
  open ( F, $file ) || die "Error reading $file";
  print "Searching $f\n" if ( $verbose );
  %thispage = ();
  while ( <F> ) {
    $data = $_;
    while ( $data =~ /(translate|tooltip)\s*\(\s*"/ ) {
      $data = $';
      if ( $data =~ /"\s*\)/ ) {
        $text = $`;
	if ( defined ( $thispage{$text} ) ) {
          # text already found within this page...
	} elsif ( $text eq 'charset' ) {
          # ignore...
	} elsif ( defined ( $text{$text} ) ) {
          if ( ! show_dups ) {
            if ( $pageHeader ne '' ) {
              print OUT $pageHeader; $pageHeader = '';
            }
            print OUT "# \"$text\" previously defined (in $foundin{$text})\n"
          }
	  $thispage{$text} = 1;
	} else {
          if ( ! length ( $trans{$text} ) ) {
            if ( $show_missing ) {
              if ( length ( $webcaltrans{$text} ) ) {
                if ( $pageHeader ne '' ) { print OUT $pageHeader; $pageHeader = ''; }
                print OUT "# \"$text\" defined in WebCalendar translation\n";
              } else {
                if ( $pageHeader ne '' ) { print OUT $pageHeader; $pageHeader = ''; }
                print OUT "#\n# << MISSING >>\n# $text:\n";
                print OUT "# English text: $base_trans{$text}\n#\n"
                  if ( length ( $base_trans{$text} ) &&
                    $base_trans{$text} ne $text );
              }
            }
            $text{$text} = 1;
	    $thispage{$text} = 1;
	    $foundin{$text} = $f;
            $notfound++ if ( ! length ( $webcaltrans{$text} ) );
	  } else {
            $text{$text} = 1;
	    $foundin{$text} = $f;
	    $thispage{$text} = 1;
            if ( $pageHeader ne '' ) {
              print OUT $pageHeader; $pageHeader = '';
            }
            printf OUT ( "%s: %s\n", $text, $trans{$text} );
	  }
        }
        $data = $';
      }
    }
  }
  close ( F );
}

if ( ! $notfound ) {
  print STDERR "All text was found in $infile.  Good job :-)\n";
} else {
  print STDERR "$notfound translation(s) missing.\n";
}

exit 0;