banana/misc.inc.php

   1 <?php
   2 /********************************************************************************
   3  * include/misc.inc.php : Misc functions
   4  * -------------------------
   5  *
   6  * This file is part of the banana distribution
   7  * Copyright: See COPYING files that comes with this distribution
   8  ********************************************************************************/
   9
  10 /********************************************************************************
  11  *  MISC
  12  */
  13
  14 function _b_($str) { return utf8_decode(dgettext('banana', utf8_encode($str))); }
  15
  16 function to_entities($str) {
  17     require_once dirname(__FILE__).'/utf8.php';
  18     return utf8entities(htmlentities($str, ENT_NOQUOTES, 'UTF-8'));
  19 }
  20
  21 function is_utf8($s) { return iconv('utf-8', 'utf-8', $s) == $s; }
  22
  23 function textFormat_translate($format)
  24 {
  25     switch (strtolower($format)) {
  26         case 'plain':       return _b_('Texte brut');
  27         case 'richtext':    return _b_('Texte enrichi');
  28         case 'html':        return _b_('HTML');
  29         default:            return $format;
  30     }
  31 }
  32
  33 /** Redirect to the page with the given parameter
  34  * @ref makeLink
  35  */
  36 function redirectInBanana($params)
  37 {
  38     header('Location: ' . makeLink($params));
  39 }
  40
  41 /** Make a link using the given parameters
  42  * @param ARRAY params, the parameters with
  43  *       key => value
  44  * Known key are:
  45  *  - group       = group name
  46  *  - artid/first = article id the the group
  47  *  - subscribe   = to show the subscription page
  48  *  - action      = action to do (new, cancel, view)
  49  *  - part        = to show the given MIME part of the article
  50  *  - pj          = to get the given attachment
  51  *  - xface       = to make a link to an xface
  52  *
  53  * Can be overloaded by defining a hook_makeLink function
  54  */
  55 function makeLink($params)
  56 {
  57     if (function_exists('hook_makeLink')
  58             && $res = hook_makeLink($params)) {
  59         return $res;
  60     }
  61     $proto = empty($_SERVER['HTTPS']) ? 'http://' : 'https://';
  62     $host  = $_SERVER['HTTP_HOST'];
  63     $file  = $_SERVER['PHP_SELF'];
  64
  65     if (isset($params['xface'])) {
  66         $file = dirname($file) . '/xface.php';
  67         $get  = 'face=' . $params['xface'];
  68     } else if (count($params) != 0) {
  69         $get = '?';
  70         foreach ($params as $key=>$value) {
  71             if (strlen($get) != 1) {
  72                 $get .= '&';
  73             }
  74             $get .= $key . '=' . $value;
  75         }
  76     } else {
  77         $get = '';
  78     }
  79
  80     return $proto . $host . $file . $get;
  81 }
  82
  83 /** Format a link to be use in a link
  84  * @ref makeLink
  85  */
  86 function makeHREF($params, $text = null, $popup = null)
  87 {
  88     $link = makeLink($params);
  89     if (is_null($text)) {
  90         $text = $link;
  91     }
  92     if (!is_null($popup)) {
  93         $popup = ' title="' . $popup . '"';
  94     }
  95     $target = null;
  96     if (isset($params['action']) && $params['action'] == 'view') {
  97         $target = ' target="_blank"';
  98     }
  99     return '<a href="' . htmlentities($link) . $target . '"' . $popup . '>' . $text . '</a>';
 100 }
 101
 102 /** Format tree images links
 103  * @param img STRING Image name (without extension)
 104  * @param alt STRING alternative string
 105  * @param width INT  to force width of the image (null if not defined)
 106  *
 107  * This function can be overloaded by defining hook_makeImg()
 108  */
 109 function makeImg($img, $alt, $height = null, $width = null)
 110 {
 111     if (function_exists('hook_makeImg')
 112             && $res = hook_makeImg($img, $alt, $height, $width)) {
 113         return $res;
 114     }
 115
 116     if (!is_null($width)) {
 117         $width = ' width="' . $width . '"';
 118     }
 119     if (!is_null($height)) {
 120         $height = ' height="' . $height . '"';
 121     }
 122
 123     $proto = empty($_SERVER['HTTPS']) ? 'http://' : 'https://';
 124     $host  = $_SERVER['HTTP_HOST'];
 125     $file  = dirname($_SERVER['PHP_SELF']) . '/img/' . $img . '.gif';
 126     $url   = $proto . $host . $file;
 127
 128     return '<img src="' . $url . '"' . $height . $width . ' alt="' . $alt . '" />';
 129 }
 130
 131 /********************************************************************************
 132  * HTML STUFF
 133  * Taken from php.net
 134  */
 135
 136 /**
 137  * @return string
 138  * @param string
 139  * @desc Strip forbidden tags and delegate tag-source check to removeEvilAttributes()
 140  */
 141 function removeEvilTags($source)
 142 {
 143     $allowedTags = '<h1><b><i><a><ul><li><pre><hr><blockquote><img><br><font><p><small><big><sup><sub><code><em>';
 144     $source = preg_replace('|</div>|i', '<br />', $source);
 145     $source = strip_tags($source, $allowedTags);
 146     return preg_replace('/<(.*?)>/ie', "'<'.removeEvilAttributes('\\1').'>'", $source);
 147 }
 148
 149 /**
 150  * @return string
 151  * @param string
 152  * @desc Strip forbidden attributes from a tag
 153  */
 154 function removeEvilAttributes($tagSource)
 155 {
 156     $stripAttrib = 'javascript:|onclick|ondblclick|onmousedown|onmouseup|onmouseover|'.
 157                    'onmousemove|onmouseout|onkeypress|onkeydown|onkeyup';
 158     return stripslashes(preg_replace("/$stripAttrib/i", '', $tagSource));
 159 }
 160
 161 /** Convert html to plain text
 162  */
 163 function htmlToPlainText($res)
 164 {
 165     $res = trim(html_entity_decode(strip_tags($res, '<div><br><p>')));
 166     $res = preg_replace("@</?(br|p|div)[^>]*>@i", "\n", $res);
 167     if (!is_utf8($res)) {
 168         $res = utf8_encode($res);
 169     }
 170     return $res;
 171 }
 172
 173 /********************************************************************************
 174  * RICHTEXT STUFF
 175  */
 176
 177 /** Convert richtext to html
 178  */
 179 function richtextToHtml($source)
 180 {
 181     $tags = Array('bold' => 'b',
 182                   'italic' => 'i',
 183                   'smaller' => 'small',
 184                   'bigger' => 'big',
 185                   'underline' => 'u',
 186                   'subscript' => 'sub',
 187                   'superscript' => 'sup',
 188                   'excerpt' => 'blockquote',
 189                   'paragraph' => 'p',
 190                   'nl' => 'br'
 191             );
 192
 193     // clean unsupported tags
 194     $protectedTags = '<signature><lt><comment><'.join('><', array_keys($tags)).'>';
 195     $source = strip_tags($source, $protectedTags);
 196
 197     // convert richtext tags to html
 198     foreach (array_keys($tags) as $tag) {
 199         $source = preg_replace('@(</?)'.$tag.'([^>]*>)@i', '\1'.$tags[$tag].'\2', $source);
 200     }
 201
 202     // some special cases
 203     $source = preg_replace('@<signature>@i', '<br>-- <br>', $source);
 204     $source = preg_replace('@</signature>@i', '', $source);
 205     $source = preg_replace('@<lt>@i', '&lt;', $source);
 206     $source = preg_replace('@<comment[^>]*>((?:[^<]|<(?!/comment>))*)</comment>@i', '<!-- \1 -->', $source);
 207     return removeEvilAttributes($source);
 208 }
 209
 210 /********************************************************************************
 211  *  HEADER STUFF
 212  */
 213
 214 function _headerdecode($charset, $c, $str) {
 215     $s = ($c == 'Q' || $c == 'q') ? quoted_printable_decode($str) : base64_decode($str);
 216     $s = iconv($charset, 'iso-8859-15', $s);
 217     return str_replace('_', ' ', $s);
 218 }
 219
 220 function headerDecode($value) {
 221     $val = preg_replace('/(=\?[^?]*\?[BQbq]\?[^?]*\?=) (=\?[^?]*\?[BQbq]\?[^?]*\?=)/', '\1\2', $value);
 222     return preg_replace('/=\?([^?]*)\?([BQbq])\?([^?]*)\?=/e', '_headerdecode("\1", "\2", "\3")', $val);
 223 }
 224
 225 function headerEncode($value, $trim = 0) {
 226     if ($trim) {
 227         if (strlen($value) > $trim) {
 228             $value = substr($value, 0, $trim) . "[...]";
 229         }
 230     }
 231     return "=?UTF-8?B?".base64_encode($value)."?=";
 232 }
 233
 234 function header_translate($hdr) {
 235     switch ($hdr) {
 236         case 'from':            return _b_('De');
 237         case 'subject':         return _b_('Sujet');
 238         case 'newsgroups':      return _b_('Forums');
 239         case 'followup-to':     return _b_('Suivi-à');
 240         case 'date':            return _b_('Date');
 241         case 'organization':    return _b_('Organisation');
 242         case 'references':      return _b_('Références');
 243         case 'x-face':          return _b_('Image');
 244         default:
 245             if (function_exists('hook_headerTranslate')
 246                     && $res = hook_headerTranslate($hdr)) {
 247                 return $res;
 248             }
 249             return $hdr;
 250     }
 251 }
 252
 253 function formatDisplayHeader($_header,$_text) {
 254     global $banana;
 255     switch ($_header) {
 256         case "date":
 257             return formatDate($_text);
 258
 259         case "followup-to":
 260             case "newsgroups":
 261             $res = "";
 262             $groups = preg_split("/[\t ]*,[\t ]*/",$_text);
 263             foreach ($groups as $g) {
 264                 $res .= makeHREF(Array('group' => $g), $g) . ', ';
 265             }
 266             return substr($res,0, -2);
 267
 268         case "from":
 269             return formatFrom($_text);
 270
 271         case "references":
 272             $rsl     = "";
 273             $ndx     = 1;
 274             $text    = str_replace("><","> <",$_text);
 275             $text    = preg_split("/[ \t]/",strtr($text,$banana->spool->ids));
 276             $parents = preg_grep("/^\d+$/",$text);
 277             $p       = array_pop($parents);
 278             $par_ok  = Array();
 279
 280             while ($p) {
 281                 $par_ok[]=$p;
 282                 $p = $banana->spool->overview[$p]->parent;
 283             }
 284             foreach (array_reverse($par_ok) as $p) {
 285                 $rsl .= makeHREF(Array('group' => $banana->spool->group), $ndx) . ' ';
 286                 $ndx++;
 287             }
 288             return $rsl;
 289
 290         case "x-face":
 291             return '<img src="' . makeLink(Array('xface' => urlencode(base64_encode($_text)))) .'"  alt="x-face" />';
 292
 293         default:
 294             if (function_exists('hook_formatDisplayHeader')
 295                     && $res = hook_formatDisplayHeader($_header, $_text))
 296             {
 297                 return $res;
 298             }
 299             return htmlentities($_text);
 300     }
 301 }
 302
 303 /********************************************************************************
 304  *  FORMATTING STUFF
 305  */
 306
 307 function formatDate($_text) {
 308     return strftime("%A %d %B %Y, %H:%M (fuseau serveur)", strtotime($_text));
 309 }
 310
 311 function fancyDate($stamp) {
 312     $today  = intval(time() / (24*3600));
 313     $dday   = intval($stamp / (24*3600));
 314
 315     if ($today == $dday) {
 316         $format = "%H:%M";
 317     } elseif ($today == 1 + $dday) {
 318         $format = _b_('hier')." %H:%M";
 319     } elseif ($today < 7 + $dday) {
 320         $format = '%a %H:%M';
 321     } else {
 322         $format = '%a %e %b';
 323     }
 324     return strftime($format, $stamp);
 325 }
 326
 327 function formatFrom($text) {
 328 #     From: mark@cbosgd.ATT.COM
 329 #     From: mark@cbosgd.ATT.COM (Mark Horton)
 330 #     From: Mark Horton <mark@cbosgd.ATT.COM>
 331     $mailto = '<a href="&#109;&#97;&#105;&#108;&#116;&#111;&#58;';
 332
 333     $result = htmlentities($text);
 334     if (preg_match("/^([^ ]+)@([^ ]+)$/",$text,$regs)) {
 335         $result="$mailto{$regs[1]}&#64;{$regs[2]}\">".htmlentities($regs[1]."&#64;".$regs[2])."</a>";
 336     }
 337     if (preg_match("/^([^ ]+)@([^ ]+) \((.*)\)$/",$text,$regs)) {
 338         $result="$mailto{$regs[1]}&#64;{$regs[2]}\">".htmlentities($regs[3])."</a>";
 339     }
 340     if (preg_match("/^\"?([^<>\"]+)\"? +<(.+)@(.+)>$/",$text,$regs)) {
 341         $result="$mailto{$regs[2]}&#64;{$regs[3]}\">".htmlentities($regs[1])."</a>";
 342     }
 343     return preg_replace("/\\\(\(|\))/","\\1",$result);
 344 }
 345
 346 function displayshortcuts($first = -1) {
 347     global $banana;
 348     extract($banana->state);
 349
 350     $res  = '<div class="banana_scuts">';
 351     $res .= '[' . makeHREF(Array(), _b_('Liste des forums')) . '] ';
 352     if (is_null($group)) {
 353         return $res.'[' . makeHREF(Array('subscribe' => 1), _b_('Abonnements')) . ']</div>';
 354     }
 355
 356     $res .= '[' . makeHREF(Array('group' => $group), $group) . '] ';
 357
 358     if (is_null($artid)) {
 359         $res .= '[' . makeHREF(Array('group'  => $group,
 360                                      'action' => 'new'),
 361                                _b_('Nouveau message'))
 362               . '] ';
 363         if (sizeof($banana->spool->overview)>$banana->tmax) {
 364             $res .= '<br />Page : ';
 365             $n = intval(log(count($banana->spool->overview), 10))+1;
 366             $i = 1;
 367             for ($ndx = 1 ; $ndx <= sizeof($banana->spool->overview) ; $ndx += $banana->tmax) {
 368                 if ($first==$ndx) {
 369                     $fmt = $i . ' ';
 370                 } else {
 371                     $fmt = makeHREF(Array('group' => $group,
 372                                           'first' => $ndx),
 373                                     $i,
 374                                     '%0' . $n . 'u-%0' . $n . 'u')
 375                          . ' ';
 376                 }
 377                 $i++;
 378                 $res .= sprintf($fmt, $ndx, min($ndx+$banana->tmax-1,sizeof($banana->spool->overview)));
 379             }
 380         }
 381     } else {
 382         $res .= '[' . makeHREF(Array('group'  => $group,
 383                                      'artid'  => $artid,
 384                                      'action' => 'new'),
 385                                _b_('Répondre'))
 386               . '] ';
 387         if ($banana->post && $banana->post->checkcancel()) {
 388             $res .= '[' . makeHREF(Array('group'  => $group,
 389                                          'artid'  => $artid,
 390                                          'action' => 'cancel'),
 391                                    _b_('Annuler ce message'))
 392                   . '] ';
 393         }
 394     }
 395     return $res.'</div>';
 396 }
 397
 398 /********************************************************************************
 399  *  FORMATTING STUFF : BODY
 400  */
 401
 402 function autoformat($text)
 403 {
 404     global $banana;
 405     $length = $banana->wrap;
 406
 407     $cmd = "echo ".escapeshellarg($text)." | perl -MText::Autoformat -e 'autoformat {left=>1, right=>$length, all=>1 };'";
 408     exec($cmd, $result, $ret);
 409     if ($ret != 0) {
 410         $result = split("\n", $text);
 411     }
 412     return $result;
 413 }
 414
 415 function wrap($text, $_prefix="", $_force=false)
 416 {
 417     $parts = preg_split("/\n-- ?\n/", $text);
 418     if (count($parts)  >1) {
 419         $sign = "\n-- \n" . array_pop($parts);
 420         $text = join("\n-- \n", $parts);
 421     } else {
 422         $sign = '';
 423     }
 424
 425     global $banana;
 426     $url    = $banana->url_regexp;
 427     $length = $banana->wrap;
 428     $max    = $length + ($length/10);
 429     $splits = split("\n", $text);
 430     $result = array();
 431     $next   = array();
 432     $format = false;
 433     foreach ($splits as $line) {
 434         if ($_force || strlen($line) > $max) {
 435             if (preg_match("!^(.*)($url)(.*)!i", $line, $matches) && strlen($matches[2]) > $length && strlen($matches) < 900) {
 436                 if (strlen($matches[1]) != 0) {
 437                     array_push($next, rtrim($matches[1]));
 438                     if (strlen($matches[1]) > $max) {
 439                         $format = true;
 440                     }
 441                 }
 442
 443                 if ($format) {
 444                     $result = array_merge($result, autoformat(join("\n", $next)));
 445                 } else {
 446                     $result = array_merge($result, $next);
 447                 }
 448                 $format = false;
 449                 $next   = array();
 450                 array_push($result, $matches[2]);
 451
 452                 if (strlen($matches[6]) != 0) {
 453                     array_push($next, ltrim($matches[6]));
 454                     if (strlen($matches[6]) > $max) {
 455                         $format = true;
 456                     }
 457                 }
 458             } else {
 459                 $format = true;
 460                 array_push($next, $line);
 461             }
 462         } else {
 463             array_push($next, $line);
 464         }
 465     }
 466     if ($format) {
 467         $result = array_merge($result, autoformat(join("\n", $next)));
 468     } else {
 469         $result = array_merge($result, $next);
 470     }
 471
 472     return $_prefix.join("\n$_prefix", $result).($_prefix ? '' : $sign);
 473 }
 474
 475 function cutlink($link)
 476 {
 477     global $banana;
 478
 479     if (strlen($link) > $banana->wrap) {
 480         $link = substr($link, 0, $banana->wrap - 3)."...";
 481     }
 482     return $link;
 483 }
 484
 485 function cleanurl($url)
 486 {
 487     $url = str_replace('@', '%40', $url);
 488     return '<a href="'.$url.'" title="'.$url.'">'.cutlink($url).'</a>';
 489 }
 490
 491 function formatbody($_text, $format='plain', $flowed=false)
 492 {
 493     if ($format == 'html') {
 494         $res = '<br/>'.html_entity_decode(to_entities(removeEvilTags($_text))).'<br/>';
 495     } else if ($format == 'richtext') {
 496         $res = '<br/>'.html_entity_decode(to_entities(richtextToHtml($_text))).'<br/>';
 497     } else {
 498         $res  = "\n\n" . to_entities(wrap($_text, "", $flowed))."\n\n";
 499         $formatting = Array('\*' => 'strong',
 500                             '_' => 'u',
 501                             '/' => 'em');
 502         foreach ($formatting as $limit=>$mark) {
 503             $res = preg_replace('@(\W)' . $limit . '(\w+)' . $limit . '(\W)@'
 504                                 ,'\1<' . $mark . '>\2</' . $mark . '>\3'
 505                                 , $res);
 506         }
 507     }
 508
 509     if ($format != 'html') {
 510         global $banana;
 511         $url  = $banana->url_regexp;
 512         $res  = preg_replace("/(&lt;|&gt;|&quot;)/", " \\1 ", $res);
 513         $res  = preg_replace("!$url!ie", "'\\1'.cleanurl('\\2').'\\3'", $res);
 514         $res  = preg_replace('/(["\[])?(?:mailto:)?([a-z0-9.\-+_]+@[a-z0-9.\-+_]+)(["\]])?/i', '\1<a href="mailto:\2">\2</a>\3', $res);
 515         $res  = preg_replace("/ (&lt;|&gt;|&quot;) /", "\\1", $res);
 516
 517         if ($format == 'richtext') {
 518             $format = 'html';
 519         }
 520     }
 521
 522     if ($format == 'html') {
 523         $res = preg_replace("@(</p>)\n?-- ?\n?(<p[^>]*>|<br[^>]*>)@", "\\1<br/>-- \\2", $res);
 524         $res = preg_replace("@<br[^>]*>\n?-- ?\n?(<p[^>]*>)@", "<br/>-- <br/>\\2", $res);
 525         $res = preg_replace("@(<pre[^>]*>)\n?-- ?\n@", "<br/>-- <br/>\\1", $res);
 526         $parts = preg_split("@(:?<p[^>]*>\n?-- ?\n?</p>|<br[^>]*>\n?-- ?\n?<br[^>]*>)@", $res);
 527     } else {
 528         while (preg_match("@(^|<pre>|\n)&gt;@i", $res)) {
 529             $res  = preg_replace("@(^|<pre>|\n)((&gt;[^\n]*\n)+)@ie",
 530                 "'\\1</pre><blockquote><pre>'"
 531                 .".stripslashes(preg_replace('@(^|<pre>|\n)&gt;[ \\t\\r]*@i', '\\1', '\\2'))"
 532                 .".'</pre></blockquote><pre>'",
 533                 $res);
 534         }
 535         $res = preg_replace("@<pre>-- ?\n@", "<pre>\n-- \n", $res);
 536         $parts = preg_split("/\n-- ?\n/", $res);
 537     }
 538
 539     if (count($parts) > 1) {
 540         $sign  = array_pop($parts);
 541         if ($format == 'html') {
 542             $res  = join('<br/>-- <br/>', $parts);
 543             $sign = '<hr style="width: 100%; margin: 1em 0em; " />'.$sign.'<br/>';
 544         } else {
 545             $res  = join('\n-- \n', $parts);
 546             $sign = '</pre><hr style="width: 100%; margin: 1em 0em; " /><pre>'.$sign;
 547         }
 548         return $res.$sign;
 549     } else {
 550         return $res;
 551     }
 552 }
 553
 554 // vim:set et sw=4 sts=4 ts=4
 555 ?>