move some aux files to lib/

1 files changed, 184 insertions, 0 deletions

diff --git a/lib/accept-to-gettext.php b/lib/accept-to-gettext.php
new file mode 100644
index 000000000..6f366d06a
--- /dev/null
+++ b/lib/accept-to-gettext.php
@@ -0,0 +1,184 @@
+<?php
+/*
+ * accept-to-gettext.inc -- convert information in 'Accept-*' headers to
+ * gettext language identifiers.
+ * Copyright (c) 2003, Wouter Verhelst <[email protected]>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Usage:
+ *
+ *  $locale=al2gt(<array of supported languages/charsets in gettext syntax>,
+ *                <MIME type of document>);
+ *  setlocale('LC_ALL', $locale); // or 'LC_MESSAGES', or whatever...
+ *
+ * Example:
+ *
+ *  $langs=array('nl_BE.ISO-8859-15','nl_BE.UTF-8','en_US.UTF-8','en_GB.UTF-8');
+ *  $locale=al2gt($langs, 'text/html');
+ *  setlocale('LC_ALL', $locale);
+ *
+ * Note that this will send out header information (to be
+ * RFC2616-compliant), so it must be called before anything is sent to
+ * the user.
+ * 
+ * Assumptions made:
+ * * Charset encodings are written the same way as the Accept-Charset
+ *   HTTP header specifies them (RFC2616), except that they're parsed
+ *   case-insensitive.
+ * * Country codes and language codes are the same in both gettext and
+ *   the Accept-Language syntax (except for the case differences, which
+ *   are dealt with easily). If not, some input may be ignored.
+ * * The provided gettext-strings are fully qualified; i.e., no "en_US";
+ *   always "en_US.ISO-8859-15" or "en_US.UTF-8", or whichever has been
+ *   used. "en.ISO-8859-15" is OK, though.
+ * * The language is more important than the charset; i.e., if the
+ *   following is given:
+ * 
+ *   Accept-Language: nl-be, nl;q=0.8, en-us;q=0.5, en;q=0.3
+ *   Accept-Charset: ISO-8859-15, utf-8;q=0.5
+ *
+ *   And the supplied parameter contains (amongst others) nl_BE.UTF-8
+ *   and nl.ISO-8859-15, then nl_BE.UTF-8 will be picked.
+ * 
+ * $Log: accept-to-gettext.inc,v $
+ * Revision 1.1.1.1  2003/11/19 19:31:15  wouter
+ * * moved to new CVS repo after death of the old
+ * * Fixed code to apply a default to both Accept-Charset and
+ *   Accept-Language if none of those headers are supplied; patch from
+ *   Dominic Chambers <[email protected]>
+ *
+ * Revision 1.2  2003/08/14 10:23:59  wouter
+ * Removed little error in Content-Type header syntaxis.
+ *
+ */
+
+/* not really important, this one; perhaps I could've put it inline with
+ * the rest. */
+function find_match($curlscore,$curcscore,$curgtlang,$langval,$charval,
+                    $gtlang)
+{
+  if($curlscore < $langval) {
+    $curlscore=$langval;
+    $curcscore=$charval;
+    $curgtlang=$gtlang;
+  } else if ($curlscore == $langval) {
+    if($curcscore < $charval) {
+      $curcscore=$charval;
+      $curgtlang=$gtlang;
+    }
+  }
+  return array($curlscore, $curcscore, $curgtlang);
+}
+
+function al2gt($gettextlangs, $mime) {
+  /* default to "everything is acceptable", as RFC2616 specifies */
+  $acceptLang=(($_SERVER["HTTP_ACCEPT_LANGUAGE"] == '') ? '*' :
+  	$_SERVER["HTTP_ACCEPT_LANGUAGE"]);
+  $acceptChar=(($_SERVER["HTTP_ACCEPT_CHARSET"] == '') ? '*' :
+  	$_SERVER["HTTP_ACCEPT_CHARSET"]);
+  $alparts=@preg_split("/,/",$acceptLang);
+  $acparts=@preg_split("/,/",$acceptChar);
+  
+  /* Parse the contents of the Accept-Language header.*/
+  foreach($alparts as $part) {
+    $part=trim($part);
+    if(preg_match("/;/", $part)) {
+      $lang=@preg_split("/;/",$part);
+      $score=@preg_split("/=/",$lang[1]);
+      $alscores[$lang[0]]=$score[1];
+    } else {
+      $alscores[$part]=1;
+    }
+  }
+
+  /* Do the same for the Accept-Charset header. */
+
+  /* RFC2616: ``If no "*" is present in an Accept-Charset field, then
+   * all character sets not explicitly mentioned get a quality value of
+   * 0, except for ISO-8859-1, which gets a quality value of 1 if not
+   * explicitly mentioned.''
+   * 
+   * Making it 2 for the time being, so that we
+   * can distinguish between "not specified" and "specified as 1" later
+   * on. */
+  $acscores["ISO-8859-1"]=2;
+
+  foreach($acparts as $part) {
+    $part=trim($part);
+    if(preg_match("/;/", $part)) {
+      $cs=@preg_split("/;/",$part);
+      $score=@preg_split("/=/",$cs[1]);
+      $acscores[strtoupper($cs[0])]=$score[1];
+    } else {
+      $acscores[strtoupper($part)]=1;
+    }
+  }
+  if($acscores["ISO-8859-1"]==2) {
+    $acscores["ISO-8859-1"]=(isset($acscores["*"])?$acscores["*"]:1);
+  }
+
+  /* 
+   * Loop through the available languages/encodings, and pick the one
+   * with the highest score, excluding the ones with a charset the user
+   * did not include.
+   */
+  $curlscore=0;
+  $curcscore=0;
+  $curgtlang=NULL;
+  foreach($gettextlangs as $gtlang) {
+
+    $tmp1=preg_replace("/\_/","-",$gtlang);
+    $tmp2=@preg_split("/\./",$tmp1);
+    $allang=strtolower($tmp2[0]);
+    $gtcs=strtoupper($tmp2[1]);
+    $noct=@preg_split("/-/",$allang);
+
+    $testvals=array(
+         array($alscores[$allang], $acscores[$gtcs]),
+	 array($alscores[$noct[0]], $acscores[$gtcs]),
+	 array($alscores[$allang], $acscores["*"]),
+	 array($alscores[$noct[0]], $acscores["*"]),
+	 array($alscores["*"], $acscores[$gtcs]),
+	 array($alscores["*"], $acscores["*"]));
+
+    $found=FALSE;
+    foreach($testvals as $tval) {
+      if(!$found && isset($tval[0]) && isset($tval[1])) {
+        $arr=find_match($curlscore, $curcscore, $curgtlang, $tval[0],
+	          $tval[1], $gtlang);
+        $curlscore=$arr[0];
+        $curcscore=$arr[1];
+        $curgtlang=$arr[2];
+	$found=TRUE;
+      }
+    }
+  }
+
+  /* We must re-parse the gettext-string now, since we may have found it
+   * through a "*" qualifier.*/
+  
+  $gtparts=@preg_split("/\./",$curgtlang);
+  $tmp=strtolower($gtparts[0]);
+  $lang=preg_replace("/\_/", "-", $tmp);
+  $charset=$gtparts[1];
+
+  header("Content-Language: $lang");
+  header("Content-Type: $mime; charset=$charset");
+
+  return $curgtlang;
+}
+
+?>