friendica/util/php2po.php

<?php
	/**
	 * Read strings.php file and create messages.po
	 *
	 * php utils/php2po.php <path/to/strings.php>
	 * 
	 * Output to <path/to/messages.po>
	 */
	 
	DEFINE("NORM_REGEXP", "|[\\\]|");
	
	
	if (! class_exists('App')) {
		class TmpA {
			public $strings = Array();
		}
		$a = new TmpA();
	}

	if ($argc<2 || in_array('-h', $argv) || in_array('--h', $argv)) {
		print "Usage: ".$argv[0]." [-p <n>] <strings.php>\n\n";
		print "Options:\n";
		print "p\tNumber of plural forms. Default: 2\n";
		print "\n";
		return;
	}

	$phpfile = $argv[1];
	$pofile = dirname($phpfile)."/messages.po";

	if (!file_exists($phpfile)){
		print "Unable to find '$phpfile'\n";
		return;
	}

	// utility functions
	function startsWith($haystack, $needle) {
		// search backwards starting from haystack length characters from the end
		return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== FALSE;
	}


	// start !
	include_once($phpfile);

	$out  = '';
	$out .= "# FRIENDICA Distributed Social Network\n";
	$out .= "# Copyright (C) 2010, 2011, 2012, 2013 the Friendica Project\n";
	$out .= "# This file is distributed under the same license as the Friendica package.\n";
	$out .= "# \n";
	$out .= 'msgid ""' ."\n";
	$out .= 'msgstr ""' ."\n";
	$out .= '"Project-Id-Version: friendica\n"' ."\n";
	$out .= '"Report-Msgid-Bugs-To: \n"' ."\n";
	$out .= '"POT-Creation-Date: '. date("Y-m-d H:i:sO").'\n"' ."\n";
	$out .= '"MIME-Version: 1.0\n"' ."\n";
	$out .= '"Content-Type: text/plain; charset=UTF-8\n"' ."\n";
	$out .= '"Content-Transfer-Encoding: 8bit\n"' ."\n";
	
	// search for plural info
	$lang = "";
	$lang_logic = "";
	$lang_pnum = 2;
	
	$_idx = array_search('-p', $argv);
	if ($_idx !== false) {
		$lang_pnum = $argv[$_idx+1];
	}
	
	$infile = file($phpfile);
	foreach ($infile as $l) {
		$l = trim($l);
		if  (startsWith($l, 'function string_plural_select_')) {
			$lang = str_replace( 'function string_plural_select_' , '', str_replace( '($n){','', $l) );
		}
		if (startsWith($l, 'return')) {
			$lang_logic = str_replace( '$', '', trim( str_replace( 'return ' , '',  $l) , ';') );
			break;
		}
	}
	
	echo "Language: $lang\n";
	echo "Plural forms: $lang_pnum\n";
	echo "Plural logic: $lang_logic;\n";
		
	$out .= sprintf('"Language: %s\n"', $lang) ."\n";
	$out .= sprintf('"Plural-Forms: nplurals=%s; plural=%s;\n"', $lang_pnum, $lang_logic)  ."\n";
	$out .= "\n";

	print "\nLoading base message.po...";
	
	// load base messages.po and extract msgids
	$base_msgids = array();
	$norm_base_msgids = array();
	$base_f = file("util/messages.po") or die("No base messages.po\n");
	$_f = 0; $_mid = ""; $_mids = array();
	foreach ( $base_f as $l) {
		$l = trim($l);
		//~ print $l."\n";
		
		if (startsWith($l, 'msgstr')) {
			if ($_mid != '""') {
				$base_msgids[$_mid] =  $_mids;
				$norm_base_msgids[preg_replace(NORM_REGEXP, "", $_mid)] = $_mid;
				//~ print "\t\t\t".$_mid. print_r($base_msgids[$_mid], true);
			}
			
			$_f = 0;
			$_mid = "";
			$_mids = array();
			
		}
		
		if (startsWith($l, '"') && $_f==2) {
			$_mids[count($_mids)-1] .= "\n".$l;
			//~ print "\t\t+mids: ".print_t($_mids, true);
		}
		if (startsWith($l, 'msgid_plural ')) {
			$_f = 2;
			$_mids[] = str_replace('msgid_plural ', '' , $l);
			//~ print "\t\t mids: ".print_r($_mids, true);
		}
		
		if (startsWith($l, '"') && $_f==1) {
			$_mid .= "\n".$l;
			$_mids[count($_mids)-1] .= "\n".$l;
			//~ print "\t+mid: $_mid \n";
		}
		if (startsWith($l, 'msgid ')) {
			$_f = 1;
			$_mid = str_replace('msgid ', '' , $l);
				$_mids = array($_mid);
			//~ print "\t mid: $_mid \n";
		}
		//~ print "\t\t\t\t$_f\n\n";
	}
	
	print " done\n";
	print "Creating '$pofile'...";
	// create msgid and msgstr 
	
	/**
	 * Get a string and retun a message.po ready text
	 * - replace " with \"
	 * - replace tab char with \t
	 * - manage multiline strings
	 */
	function massage_string($str) {
		$str = str_replace('\\','\\\\',$str);
		$str = str_replace('"','\"',$str);
		$str = str_replace("\t",'\t',$str);
		$str = str_replace("\n",'\n"'."\n".'"',$str);
		if (strpos($str, "\n")!==false  && $str[0]!=='"') $str = '"'."\n".$str;
		$str = preg_replace("|\n([^\"])|", "\n\"$1", $str);
		return sprintf('"%s"', $str);
	}
	
	function find_original_msgid($str) {
		global $norm_base_msgids;
		$norm_str = preg_replace(NORM_REGEXP, "", $str);
		if (array_key_exists($norm_str, $norm_base_msgids)) {
			return $norm_base_msgids[$norm_str];
		}
		return $str;
	}
	
	$warnings = "";
	foreach ($a->strings as $key=>$str) {
		$msgid = massage_string($key);
		
		if (preg_match("|%[sd0-9](\$[sn])*|", $msgid)) {
			$out .= "#, php-format\n";
		}
		$msgid = find_original_msgid($msgid);
		$out .= 'msgid '. $msgid . "\n";
		
		if (is_array($str)) {
			if (array_key_exists($msgid, $base_msgids) && isset($base_msgids[$msgid][1]))  {
				$out .= 'msgid_plural '. $base_msgids[$msgid][1] . "\n";
			} else {
				$out .= 'msgid_plural '. $msgid . "\n";
				$warnings .= "[W] No source plural form for msgid:\n". str_replace("\n","\n\t", $msgid) . "\n\n";
			}
			foreach ( $str as $n => $msgstr) {
				$out .= 'msgstr['.$n.'] '. massage_string($msgstr) . "\n";
			}
		} else {
			$out .= 'msgstr '. massage_string($str) . "\n";
		}
		
		$out .= "\n";
	
	}

	file_put_contents($pofile, $out);
	
	print " done\n";
	
	if ($warnings=="") {
		print "No warnings.\n";
	} else {
		print $warnings;
	}