<?php
/**
 * @package languages
 * @subpackage functions
 * @version $Header$
 *
 * Copyright (c) 2005 bitweaver.org
 * Tiki is copyright (c) 2002-2003, Luis Argerich, Garland Foster, Eduardo Polidor, et. al.
 * All Rights Reserved. See below for details and a complete list of authors.
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See http://www.gnu.org/copyleft/lesser.html for details.
 */

/**
 * Initialization
 */

/**
 * Update the language.php files
 * call example: get_strings.php?lang=fr&close
 * @param lang=xx    : only translate lang 'xx' - if the parameter is not given all languages are translated
 * @param comments   : generate all comments (equal to close&module)
 * @param close      : look for similar strings that are allready translated and generate a commet if a 'match' is made
 * @param module     : generate comments that describes in which .php and/or .tpl\n module(s) a certain string was found (useful for checking translations in context)
 * @param patch      : looks for the file 'language.patch' in the same directory as the corresponding language.php and overrides any strings in language.php - good if a user does not agree with some translations or if only changes are sent to the maintaner
 * @param spelling   : generate a file spellcheck_me.txt in the applicable languages directory that contains all the words used in the translated text. This makes it simple to use a spellchecker on the resulting file
 * @param groupwrite : Sets the generated files permissions to allow the generated language.php also be group writable. This is good for translators if they do not have root access to tiki but are in the same group as the webserver. Please remember to have write access removed when translation is finished for security reasons. (Run script again whithout this parameter)
 */



////////////////////////////////////////////////////////////////////////////
/// functions

$addPHPslashes = Array ("\n" => '\n',
			"\r" => '\r',
			"\t" => '\t',
			'\\' => '\\\\',
			'$'  => '\$',
			'"'  => '\"');

function addphpslashes ($string) {
  // Translate as in "Table 7-1 Escaped characters" in the PHP manual
  // $string = str_replace ("\n", '\n',   $string);
  // $string = str_replace ("\r", '\r',   $string);
  // $string = str_replace ("\t", '\t',   $string);
  // $string = str_replace ('\\', '\\\\', $string);
  // $string = str_replace ('$',  '\$',   $string);
  // $string = str_replace ('"',  '\"',   $string);
  // We skip the exotic regexps for octal an hexadecimal
  // notation - \{0-7]{1,3} and \x[0-9A-Fa-f]{1,2} -
  // since they should not apper in english strings.
  // return $string;
  global $addPHPslashes;
  return strtr ($string, $addPHPslashes);
}


$removePHPslashes = Array ('\n'   => "\n",
			   '\r'   => "\r",
			   '\t'   => "\t",
			   '\\\\' => '\\',
			   '\$'   => '$',
			   '\"'   => '"');

function removephpslashes ($string) {
  // $string = str_replace ('\n',   "\n", $string); 
  // $string = str_replace ('\r',   "\r", $string);
  // $string = str_replace ('\t',   "\t", $string);
  // $string = str_replace ('\\\\', '\\', $string);
  // $string = str_replace ('\$',   '$',  $string);
  // $string = str_replace ('\"',   '"',  $string);
  // We skip the exotic regexps for octal an hexadecimal
  // notation - \{0-7]{1,3} and \x[0-9A-Fa-f]{1,2} - since they 
  // should not apper in english strings.
  if (preg_match ('/\{0-7]{1,3}|\x[0-9A-Fa-f]{1,2}/', $string, $match)) {
    trigger_error ("Octal or hexadecimal string '".$match[1]."' not supported",
		   E_WARNING);

  }
  // return $string;
  global $removePHPslashes;
  return strtr ($string, $removePHPslashes);
}

function hardwire_file ($file)
{
  global $files;
  $files[] = $file;
  print "File (hardwired): $file<br />";
}

function collect_files ($dir)
{
  global $files;
  $handle = opendir ($dir);
  while (false !== ($file = readdir ($handle))) {
    // Skip current and parent directory
    // also skip other directories which may contain source code
    // that should not be translated (the directories normally contain
    // temporary results etc.)
    // Please note that these directories will be skipped on all levels
    if ('.'   == $file || '..'          == $file || 
       'lang' == $file || 'templates_c' == $file || 'dump'  == $file ||
       'util' == $file || 'gallery2' == $file || 'shopping' == $file ||
       'temp' == $file || 'img'         == $file || 'cache' == $file) {
      continue;
    }

    $filepath = $dir . '/' . $file;
    if (preg_match ("/.*\.(tpl|php)$/", $file)) {
      print("File: $filepath<br />");
      $files[] = $filepath; 
    }
    else {
      if (is_dir ($filepath)) {
	collect_files ($filepath);
      }
    }
  }
  closedir ($handle);
}

function addToWordlist (&$wordlist, $sentence) {
  global $spelling;
  if ($spelling) {
    // Perhapps regexphandling must be improved?!
    // Spellcheckers seems to handle special chars quite OK however.
    $words = preg_split  ("/[\s]+/", $sentence);
    
    foreach ($words as $dummy => $word) {
      $wordlist[strtolower($word)] = 1;
    }
  }
}


function writeFile_and_User ($fd, $outstring) {
  print (nl2br ($outstring));
  fwrite ($fd, $outstring);
}

function writeTranslationPair ($fd, $key, $val) {
  writeFile_and_User ($fd, 
		      '"' . addphpslashes ($key) . '"' . " => " .
		      '"' . addphpslashes ($val) . '",');
}

////////////////////////////////////////////////////////////////////////////

require_once( '../kernel/includes/setup_inc.php' );

if(!$gBitUser->isAdmin()) {
  die("You need to be admin to run this script");
}

$comments = isset ($_REQUEST['comments']);
$close    = isset ($_REQUEST['close'])  || $comments;
$module   = isset ($_REQUEST['module']) || $comments;
$patch    = isset ($_REQUEST['patch']);
$spelling = isset ($_REQUEST['spelling']);
$group_w  = isset ($_REQUEST['groupwrite']);

$nohelp     = isset ($_REQUEST['nohelp']);
$nosections = isset ($_REQUEST['nosections']);


// Get the language(s)
$languages = Array();
print("Languages: ");
if (isset ($_REQUEST["lang"])) {
  $lang = $_REQUEST["lang"];
  $languages[] = $lang;
  print ("$lang");  
}
else {
  $handle=opendir ('lang');
  while (false !== ($lang = readdir ($handle))) {
    if($lang == '.' || $lang == '..') 
      continue;
    print("$lang ");  
    $languages[] = $lang;
  }
  closedir ($handle);
}    	
print("<br />");  


$files = Array();

$wordlist = Array ();

## When collecting files we need to add a file since the directory which it
## is placed in is excluded. We should keep hardwiring to a minimum.
## In a normal case a file that should be translated shuold not exist in
## a (sub)directory that is excluded. In this (unfortunate) case it seems that
## the file is placed in a logical location.
collect_files ( BIT_ROOT_PATH );
hardwire_file ( LANGUAGES_PKG_INCLUDE_PATH.'lang_mapping_inc.php');



$oldEndMarker = '##end###';
$endMarker = '###end###';
foreach ($languages as $sel) {
  unset ($lang);
  unset ($to_translate);
  unset ($translated); 
  unset ($modulename);
  unset ($unused);
  unset ($dictionary);
  $to_translate = Array ();
  $modulename   = Array ();
  $translated   = Array ();

  if ($patch) {
    $origPatch = "lang/$sel/language.patch";
    if (!file_exists ($origPatch)) {
      die ("No patch file .../$origPatch exisits");
    }
    require ($origPatch);
    $patchLang = $lang;
    unset ($lang);
  }

  require("lang/$sel/language.php");

  if (isset ($lang[$oldEndMarker])) {
    unset ($lang[$oldEndMarker]);
  }
  if (isset ($lang[$endMarker])) {
    unset ($lang[$endMarker]);
  }

  $unused     = $lang;
  $dictionary = $lang;


  if ($group_w) {
    // We set umask to zero value to allow proper chmod later
    // (Is this really nesserary? Does not chmod work independently of umask?)
    $old_umask = umask (0); 
  }

  $fw = fopen( LANGUAGES_PKG_PATH."lang/$sel/new_language.php",'w');
  
  print("&lt;");
  fwrite($fw,"<");
  writeFile_and_User ($fw, "?php");
  // The comment coding:utf-8 is for the benefit of emacs
  // and must be on the very first line in the file
  // we leave this comment in even if comments are off since
  // editing files with the wrong encoding causes commical effects at best.
  writeFile_and_User ($fw, " // -*- coding:utf-8 -*-\n");

  if (!$nohelp) {
    // Good to have instructions for translators in the release file.
    // The comments get filtered away by Smarty anyway
    writeFile_and_User ($fw, "// parameters:\n");
    writeFile_and_User ($fw, "// lang=xx    : only tranlates language 'xx',\n");
    writeFile_and_User ($fw, "//              if not given all languages are translated\n");
    writeFile_and_User ($fw, "// comments   : generate all comments (equal to close&module)\n");
    writeFile_and_User ($fw, "// close      : look for similar strings that are allready translated and\n");
    writeFile_and_User ($fw, "//              generate a commet if a 'match' is made\n");
    writeFile_and_User ($fw, "// module     : generate comments that describes in which .php and/or .tpl\n");
    writeFile_and_User ($fw, "//              module(s) a certain string was found (useful for checking\n");
    writeFile_and_User ($fw, "//              translations in context)\n");

    writeFile_and_User ($fw, "// patch      : looks for the file 'language.patch' in the same directory\n");
    writeFile_and_User ($fw, "//              as the corresponding language.php and overrides any strings\n");
    writeFile_and_User ($fw, "//              in language.php - good if a user does not agree with\n");
    writeFile_and_User ($fw, "//              some translations or if only changes are sent to the maintaner\n");

    writeFile_and_User ($fw, "// spelling   : generates a file 'spellcheck_me.txt' that contains the\n");
    writeFile_and_User ($fw, "//              words used in the translation.It is then easy to check this\n");
    writeFile_and_User ($fw, "//              file for spelling errors (corrections must be done in\n ");
    writeFile_and_User ($fw, "//              'language.php, however)\n");


    writeFile_and_User ($fw, "// groupwrite : Sets the generated files permissions to allow the generated\n");
    writeFile_and_User ($fw, "//              language.php also be group writable. This is good for\n");
    writeFile_and_User ($fw, "//              translators if they do not have root access to tiki but\n");
    writeFile_and_User ($fw, "//              are in the same group as the webserver. Please remember\n");
    writeFile_and_User ($fw, "//              to have write access removed when translation is finished\n");
    writeFile_and_User ($fw, "//              for security reasons. (Run script again without this\n");
    writeFile_and_User ($fw, "//              parameter)\n");




    writeFile_and_User ($fw, "// Examples:\n");
    writeFile_and_User ($fw, "// http://www.neonchart.com/get_strings.php?lang=sv\n");
    writeFile_and_User ($fw, "// Will translate langauage 'sv' and (almost) avoiding comment generation\n\n");

    writeFile_and_User ($fw, "// http://www.neonchart.com/get_strings.php?lang=sv&comments\n");
    writeFile_and_User ($fw, "// Will translate langauage 'sv' and generate all possible comments.\n");
    writeFile_and_User ($fw, "// This is the most usefull mode when working on a translation.\n\n");
    writeFile_and_User ($fw, "// http://www.neonchart.com/get_strings.php?lang=sv&nohelp&nosections\n");
    writeFile_and_User ($fw, "// These options will only provide the minimal amout of comments.\n");
    writeFile_and_User ($fw, "// Usefull mode when preparing a translation for distribution.\n\n");
    writeFile_and_User ($fw, "// http://www.neonchart.com/get_strings.php?nohelp&nosections\n");
    writeFile_and_User ($fw, "// Prepare all languages for release \n\n");
  }


  // Start generating the lang array
  writeFile_and_User ($fw, "\n\$lang=Array(\n");  
  
  foreach ($files as $file) {
    $fp = fopen ($file, "r");
    $data = fread ($fp, filesize ($file));
    fclose ($fp);

    unset ($words);   $words   = Array ();
    unset ($uqwords); $uqwords = Array ();
    unset ($sqwords); $sqwords = Array ();
    unset ($dqwords); $dqwords = Array ();


    // PM for unusual regexps
    // (?m) sets PCRE_MULTILINE which makes '^' and '$' ignore '\n'
    // (?s) sets PCRE_DOTALL which makes that '.' also matches '\n'
    // ?: below makes that the pharentesis is not extracted int the outarray
    // +? below is the nongreedy version of the ? operator


    if (preg_match ("/\.php$/", $file)) {
      // Do not translate PHP comments (we only filter the "safe" cases)
      // Calling php -w <filename> would take care of all comments,
      // but that does not go well with safe-mode.
      $data = preg_replace ("/(?s)\/\*.*?\*\//", "", $data);  // C comments
      $data = preg_replace ("/(?m)^\s*\/\/.*\$/", "", $data); // C++ comments
      $data = preg_replace ("/(?m)^\s*\#.*\$/",   "", $data); // shell comments

      // Only extract tra () and hawtra () in .php-files

      // Extract from SINGLE qouted strings
      preg_match_all ('/(?s)[^a-zA-Z0-9_\x7f-\xff](?:haw)?tra\s*\(\s*\'(.+?)\'\s*\)/', $data, $sqwords);

      // Extract from DOUBLE quoted strings
      preg_match_all ('/(?s)[^a-zA-Z0-9_\x7f-\xff](?:haw)?tra\s*\(\s*"(.+?)"\s*\)/', $data, $dqwords);
    }

    if (preg_match ("/\.tpl$/", $file)) {
      // Do not translate text in Smarty comments: {* Smarty comment *}
      $data = preg_replace ('/(?s)\{\*.*?\*\}/', '', $data); // Smarty comment 

      // Strings of the type {tr}{$perms[user].type}{/tr} need (should)
      // not be translated
      $data = preg_replace ('/(?s)\{tr\}\s*\{[$][^\}]*?\}\s*\{\/tr\}/','',$data);

      // Only extract {tr} ... {/tr} in .tpl-files
      preg_match_all ('/(?s)\{tr\}(.+?)\{\/tr\}/', $data, $uqwords);
    }

    // Transfer UNqouted words (if any) to the words array
    if (count ($uqwords) > 0) {
      $words = $uqwords[1];
    }

    // Transfer SINGLEqouted words (if any) to the words array
    if (count ($sqwords) > 0) {
      foreach (array_unique ($sqwords[1]) as $sqword) {
	// Strip the extracted strings from escapes
	// (these will not be reinserted during generation, since ' need
	// not be escaped when string delimeters are double quotes)
	$word = preg_replace ("/\\'/", "'", $sqword);
	$words[$word] = $word;                               
      }
    }

    // Transfer DOUBLEqouted words (if any) to the words array
    if (count ($dqwords) > 0) {
      foreach (array_unique ($dqwords[1]) as $dqword) {
	// Strip the extracted strings from escapes
	// (these will be reinserted during generation)
	
	$word = removephpslashes ($dqword);
	$words["$word"] = "$word";                               
      }
    }

    foreach (array_unique ($words) as $word) {
      if (isset ($lang[$word])) {
	if (!isset ($translated[$word])) {
	  $translated[$word] = $lang[$word];
	}
	unset ($unused[$word]);
      }
      else {
	if (!isset ($to_translate[$word])) {
	  $to_translate[$word]=$word;
	}
      }
      
      if (isset ($modulename[$word])) {
	if (!strpos ($modulename[$word], $file)) {
	  $modulename[$word] = $modulename[$word] .', '. $file;
	}
      }
      else {
	$modulename[$word] = $file;
      }
    }
  } // foreach ($files as $file)


  //////////////////////////////////////////////
  if ($patch) {
    foreach ($unused as $key => $val) {
      if (isset ($patchLang[$key])) {
	$unused[$key] = $patchLang[$key];
      }
    }
    
    foreach ($to_translate as $key => $val) {
      if (isset ($patchLang[$key])) {
	// $to_translate[$key] = $patchLang[$key];
	// We are removing words from the to_translate list,
	// since they are provided by the patch
	unset ($to_translate[$key]);
      }
    }
    
    foreach ($translated as $key=>$val) {
      if (isset ($patchLang[$key])) {
	$translated[$key] = $patchLang[$key];
      }
    }
  }

  unset ($unused['']);
  if (count ($unused) > 0) {
    writeFile_and_User ($fw, "// ### Start of unused words\n");
    writeFile_and_User ($fw, "// ### Please remove manually!\n");
    writeFile_and_User ($fw, "// ### N.B. Legitimate strings may be marked");
    writeFile_and_User ($fw, "// ### as unused!\n");
    writeFile_and_User ($fw, "// ### Please see http://doc.bitweaver.org/wiki/index.php?page=UnusedWords for furhter info.\n");
    foreach ($unused as $key => $val) {
      writeTranslationPair ($fw, $key, $val);
      addToWordlist ($wordlist, $val);
      writeFile_and_User ($fw, "\n");
    }
    writeFile_and_User ($fw, "// ### end of unused words\n\n");
  }

  unset ($to_translate['']);
  if (count ($to_translate) > 0) {
    if ('en' != $sel && !$nosections) {
      writeFile_and_User ($fw, "// ### start of untranslated words\n");
      writeFile_and_User ($fw,
			  "// ### uncomment value pairs as you translate\n");
    }
    foreach ($to_translate as $key => $val) {
      writeFile_and_User ($fw, "// ");
      writeTranslationPair ($fw, $key, $val);
      addToWordlist ($wordlist, $val);
      if ($module || $close) {
	$closeText  = "";
	$moduleText = "";
	if ($close) {
	  $dist = 256;
	  foreach ($dictionary as $english=>$trans) {
	    $d = levenshtein (strtolower (substr ($key, 0, 255)),
			      strtolower (substr ($english, 0, 255)));
	    if ($d < $dist) {
	      $dist = $d;
	      $closeTrans   = $trans;
	      $closeEnglish = $english;
	    }
	  }
	  
	  if ($dist < 1 + strlen ($key)/5) {
	    $closeText = ' // ## CLOSE: "' . addphpslashes ($closeEnglish) .
	                 '" => "' . addphpslashes ($closeTrans) . '"';
	  }
	}

	if ($module) {
	  $moduleText = " // ## MODULES " . $modulename[$key];
	}

	writeFile_and_User ($fw, "${closeText}${moduleText}");
      }
      writeFile_and_User ($fw, "\n");
    }
    if ('en' != $sel && !$nosections) {
      writeFile_and_User ($fw, "// ### end of untranslated words\n");
      writeFile_and_User ($fw, "// ###\n\n");
    }
  }

  if ('en' != $sel && !$nosections) {
    writeFile_and_User($fw, "// ###\n");
    writeFile_and_User ($fw,"// ### start of possibly untranslated words\n");
    writeFile_and_User($fw, "// ###\n\n");
  }
  foreach ($translated as $key => $val) {
    if ($key == $val) {
      writeTranslationPair ($fw, $key, $val);
      addToWordlist ($wordlist, $val);
      if ($module) {
	writeFile_and_User ($fw, ' // '. $modulename[$key]);
      }
      writeFile_and_User ($fw, "\n");
    }
  }
  if ('en' != $sel && !$nosections) {
    writeFile_and_User($fw, "// ###\n");
    writeFile_and_User($fw, "// ### end of possibly untranslated words\n");
    writeFile_and_User($fw, "// ###\n\n");
  }

  foreach($translated as $key => $val) {
    if ($key != $val) {
      writeTranslationPair ($fw, $key, $val);
      addToWordlist ($wordlist, $val);
      if ($module) { 
	writeFile_and_User ($fw, ' // '. $modulename[$key]);
      }
      writeFile_and_User ($fw, "\n");
    }
  }
  writeFile_and_User ($fw, '"'.$endMarker.'"=>"'.$endMarker.'");'."\n");
  print ("?&gt;<br />\n");  
  fwrite ($fw, '?>'."\n");  
  fclose ($fw);

  if ($spelling) {
    $fw = fopen("lang/$sel/spellcheck_me.txt", 'w');
    ksort ($wordlist);
    reset ($wordlist);
    foreach ($wordlist as $word => $dummy) {
      fwrite ($fw, "$word\n");
    }

    fclose ($fw);
  }

  @unlink ("lang/$sel/old.php");
  rename ("lang/$sel/language.php","lang/$sel/old.php");
  rename ("lang/$sel/new_language.php","lang/$sel/language.php");

  if ($group_w) {
    // chmod the file to be writeable also by group for users that do not
    // have root acces
    chmod ("lang/$sel/language.php", 0664); 

    umask($old_umask); // Reset umask back to original value
  }
}
?>
