3 * Changelog handling functions
5 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author Andreas Gohr <andi@splitbrain.org>
9 // Constants for known core changelog line types.
10 // Use these in place of string literals for more readable code.
11 define('DOKU_CHANGE_TYPE_CREATE', 'C');
12 define('DOKU_CHANGE_TYPE_EDIT', 'E');
13 define('DOKU_CHANGE_TYPE_MINOR_EDIT', 'e');
14 define('DOKU_CHANGE_TYPE_DELETE', 'D');
15 define('DOKU_CHANGE_TYPE_REVERT', 'R');
18 * parses a changelog line into it's components
20 * @author Ben Coburn <btcoburn@silicodon.net>
22 function parseChangelogLine($line) {
23 $tmp = explode("\t", $line);
24 if ($tmp!==false && count($tmp)>1) {
26 $info['date'] = (int)$tmp[0]; // unix timestamp
27 $info['ip'] = $tmp[1]; // IPv4 address (127.0.0.1)
28 $info['type'] = $tmp[2]; // log line type
29 $info['id'] = $tmp[3]; // page id
30 $info['user'] = $tmp[4]; // user name
31 $info['sum'] = $tmp[5]; // edit summary (or action reason)
32 $info['extra'] = rtrim($tmp[6], "\n"); // extra data (varies by line type)
34 } else { return false; }
38 * Add's an entry to the changelog and saves the metadata for the page
40 * @param int $date Timestamp of the change
41 * @param String $id Name of the affected page
42 * @param String $type Type of the change see DOKU_CHANGE_TYPE_*
43 * @param String $summary Summary of the change
44 * @param mixed $extra In case of a revert the revision (timestmp) of the reverted page
45 * @param array $flags Additional flags in a key value array.
47 * - ExternalEdit - mark as an external edit.
49 * @author Andreas Gohr <andi@splitbrain.org>
50 * @author Esther Brunner <wikidesign@gmail.com>
51 * @author Ben Coburn <btcoburn@silicodon.net>
53 function addLogEntry($date, $id, $type=DOKU_CHANGE_TYPE_EDIT, $summary='', $extra='', $flags=null){
56 // check for special flags as keys
57 if (!is_array($flags)) { $flags = array(); }
58 $flagExternalEdit = isset($flags['ExternalEdit']);
62 $created = @filectime($file);
63 $minor = ($type===DOKU_CHANGE_TYPE_MINOR_EDIT);
64 $wasRemoved = ($type===DOKU_CHANGE_TYPE_DELETE);
66 if(!$date) $date = time(); //use current time if none supplied
67 $remote = (!$flagExternalEdit)?clientIP(true):'127.0.0.1';
68 $user = (!$flagExternalEdit)?$_SERVER['REMOTE_USER']:'';
70 $strip = array("\t", "\n");
74 'type' => str_replace($strip, '', $type),
77 'sum' => utf8_substr(str_replace($strip, '', $summary),0,255),
78 'extra' => str_replace($strip, '', $extra)
83 $oldmeta = p_read_metadata($id);
85 if (!$INFO['exists'] && empty($oldmeta['persistent']['date']['created'])){ // newly created
86 $meta['date']['created'] = $created;
88 $meta['creator'] = $INFO['userinfo']['name'];
89 $meta['user'] = $user;
91 } elseif (!$INFO['exists'] && !empty($oldmeta['persistent']['date']['created'])) { // re-created / restored
92 $meta['date']['created'] = $oldmeta['persistent']['date']['created'];
93 $meta['date']['modified'] = $created; // use the files ctime here
94 $meta['creator'] = $oldmeta['persistent']['creator'];
95 if ($user) $meta['contributor'][$user] = $INFO['userinfo']['name'];
96 } elseif (!$minor) { // non-minor modification
97 $meta['date']['modified'] = $date;
98 if ($user) $meta['contributor'][$user] = $INFO['userinfo']['name'];
100 $meta['last_change'] = $logline;
101 p_set_metadata($id, $meta);
104 // add changelog lines
105 $logline = implode("\t", $logline)."\n";
106 io_saveFile(metaFN($id,'.changes'),$logline,true); //page changelog
107 io_saveFile($conf['changelog'],$logline,true); //global changelog cache
111 * Add's an entry to the media changelog
113 * @author Michael Hamann <michael@content-space.de>
114 * @author Andreas Gohr <andi@splitbrain.org>
115 * @author Esther Brunner <wikidesign@gmail.com>
116 * @author Ben Coburn <btcoburn@silicodon.net>
118 function addMediaLogEntry($date, $id, $type=DOKU_CHANGE_TYPE_EDIT, $summary='', $extra='', $flags=null){
123 if(!$date) $date = time(); //use current time if none supplied
124 $remote = clientIP(true);
125 $user = $_SERVER['REMOTE_USER'];
127 $strip = array("\t", "\n");
131 'type' => str_replace($strip, '', $type),
134 'sum' => utf8_substr(str_replace($strip, '', $summary),0,255),
135 'extra' => str_replace($strip, '', $extra)
138 // add changelog lines
139 $logline = implode("\t", $logline)."\n";
140 io_saveFile($conf['media_changelog'],$logline,true); //global media changelog cache
141 io_saveFile(mediaMetaFN($id,'.changes'),$logline,true); //media file's changelog
145 * returns an array of recently changed files using the
148 * The following constants can be used to control which changes are
149 * included. Add them together as needed.
151 * RECENTS_SKIP_DELETED - don't include deleted pages
152 * RECENTS_SKIP_MINORS - don't include minor changes
153 * RECENTS_SKIP_SUBSPACES - don't include subspaces
154 * RECENTS_MEDIA_CHANGES - return media changes instead of page changes
155 * RECENTS_MEDIA_PAGES_MIXED - return both media changes and page changes
157 * @param int $first number of first entry returned (for paginating
158 * @param int $num return $num entries
159 * @param string $ns restrict to given namespace
160 * @param int $flags see above
161 * @return array recently changed files
163 * @author Ben Coburn <btcoburn@silicodon.net>
164 * @author Kate Arzamastseva <pshns@ukr.net>
166 function getRecents($first,$num,$ns='',$flags=0){
174 // read all recent changes. (kept short)
175 if ($flags & RECENTS_MEDIA_CHANGES) {
176 $lines = @file($conf['media_changelog']);
178 $lines = @file($conf['changelog']);
180 $lines_position = count($lines)-1;
181 $media_lines_position = 0;
182 $media_lines = array();
184 if ($flags & RECENTS_MEDIA_PAGES_MIXED) {
185 $media_lines = @file($conf['media_changelog']);
186 $media_lines_position = count($media_lines)-1;
189 $seen = array(); // caches seen lines, _handleRecent() skips them
192 while ($lines_position >= 0 || (($flags & RECENTS_MEDIA_PAGES_MIXED) && $media_lines_position >=0)) {
193 if (empty($rec) && $lines_position >= 0) {
194 $rec = _handleRecent(@$lines[$lines_position], $ns, $flags, $seen);
200 if (($flags & RECENTS_MEDIA_PAGES_MIXED) && empty($media_rec) && $media_lines_position >= 0) {
201 $media_rec = _handleRecent(@$media_lines[$media_lines_position], $ns, $flags | RECENTS_MEDIA_CHANGES, $seen);
203 $media_lines_position --;
207 if (($flags & RECENTS_MEDIA_PAGES_MIXED) && @$media_rec['date'] >= @$rec['date']) {
208 $media_lines_position--;
215 if ($flags & RECENTS_MEDIA_CHANGES) $x['media'] = true;
218 if(--$first >= 0) continue; // skip first entries
221 // break when we have enough entries
222 if($count >= $num){ break; }
228 * returns an array of files changed since a given time using the
231 * The following constants can be used to control which changes are
232 * included. Add them together as needed.
234 * RECENTS_SKIP_DELETED - don't include deleted pages
235 * RECENTS_SKIP_MINORS - don't include minor changes
236 * RECENTS_SKIP_SUBSPACES - don't include subspaces
237 * RECENTS_MEDIA_CHANGES - return media changes instead of page changes
239 * @param int $from date of the oldest entry to return
240 * @param int $to date of the newest entry to return (for pagination, optional)
241 * @param string $ns restrict to given namespace (optional)
242 * @param int $flags see above (optional)
243 * @return array of files
245 * @author Michael Hamann <michael@content-space.de>
246 * @author Ben Coburn <btcoburn@silicodon.net>
248 function getRecentsSince($from,$to=null,$ns='',$flags=0){
252 if($to && $to < $from)
255 // read all recent changes. (kept short)
256 if ($flags & RECENTS_MEDIA_CHANGES) {
257 $lines = @file($conf['media_changelog']);
259 $lines = @file($conf['changelog']);
262 // we start searching at the end of the list
263 $lines = array_reverse($lines);
266 $seen = array(); // caches seen lines, _handleRecent() skips them
268 foreach($lines as $line){
269 $rec = _handleRecent($line, $ns, $flags, $seen);
271 if ($rec['date'] >= $from) {
272 if (!$to || $rec['date'] <= $to) {
281 return array_reverse($recent);
285 * Internal function used by getRecents
287 * don't call directly
290 * @author Andreas Gohr <andi@splitbrain.org>
291 * @author Ben Coburn <btcoburn@silicodon.net>
293 function _handleRecent($line,$ns,$flags,&$seen){
294 if(empty($line)) return false; //skip empty lines
296 // split the line into parts
297 $recent = parseChangelogLine($line);
298 if ($recent===false) { return false; }
301 if(isset($seen[$recent['id']])) return false;
304 if($recent['type']===DOKU_CHANGE_TYPE_MINOR_EDIT && ($flags & RECENTS_SKIP_MINORS)) return false;
306 // remember in seen to skip additional sights
307 $seen[$recent['id']] = 1;
309 // check if it's a hidden page
310 if(isHiddenPage($recent['id'])) return false;
313 if (($ns) && (strpos($recent['id'],$ns.':') !== 0)) return false;
315 // exclude subnamespaces
316 if (($flags & RECENTS_SKIP_SUBSPACES) && (getNS($recent['id']) != $ns)) return false;
319 if ($flags & RECENTS_MEDIA_CHANGES) {
320 $recent['perms'] = auth_quickaclcheck(getNS($recent['id']).':*');
322 $recent['perms'] = auth_quickaclcheck($recent['id']);
324 if ($recent['perms'] < AUTH_READ) return false;
327 if($flags & RECENTS_SKIP_DELETED){
328 $fn = (($flags & RECENTS_MEDIA_CHANGES) ? mediaFN($recent['id']) : wikiFN($recent['id']));
329 if(!@file_exists($fn)) return false;
336 * Get the changelog information for a specific page id
337 * and revision (timestamp). Adjacent changelog lines
338 * are optimistically parsed and cached to speed up
339 * consecutive calls to getRevisionInfo. For large
340 * changelog files, only the chunk containing the
341 * requested changelog line is read.
343 * @author Ben Coburn <btcoburn@silicodon.net>
344 * @author Kate Arzamastseva <pshns@ukr.net>
346 function getRevisionInfo($id, $rev, $chunk_size=8192, $media=false) {
347 global $cache_revinfo;
348 $cache =& $cache_revinfo;
349 if (!isset($cache[$id])) { $cache[$id] = array(); }
352 // check if it's already in the memory cache
353 if (isset($cache[$id]) && isset($cache[$id][$rev])) {
354 return $cache[$id][$rev];
358 $file = mediaMetaFN($id, '.changes');
360 $file = metaFN($id, '.changes');
362 if (!@file_exists($file)) { return false; }
363 if (filesize($file)<$chunk_size || $chunk_size==0) {
365 $lines = file($file);
366 if ($lines===false) { return false; }
369 $fp = fopen($file, 'rb'); // "file pointer"
370 if ($fp===false) { return false; }
372 fseek($fp, 0, SEEK_END);
378 while ($tail-$head>$chunk_size) {
379 $finger = $head+floor(($tail-$head)/2.0);
381 fgets($fp); // slip the finger forward to a new line
382 $finger = ftell($fp);
383 $tmp = fgets($fp); // then read at that location
384 $tmp = parseChangelogLine($tmp);
385 $finger_rev = $tmp['date'];
386 if ($finger==$head || $finger==$tail) { break; }
387 if ($finger_rev>$rev) {
395 // cound not find chunk, assume requested rev is missing
402 $chunk_size = max($tail-$head, 0); // found chunk size
405 while ($got<$chunk_size && !feof($fp)) {
406 $tmp = @fread($fp, max($chunk_size-$got, 0));
407 if ($tmp===false) { break; } //error state
408 $got += strlen($tmp);
411 $lines = explode("\n", $chunk);
412 array_pop($lines); // remove trailing newline
416 // parse and cache changelog lines
417 foreach ($lines as $value) {
418 $tmp = parseChangelogLine($value);
420 $cache[$id][$tmp['date']] = $tmp;
423 if (!isset($cache[$id][$rev])) { return false; }
424 return $cache[$id][$rev];
428 * Return a list of page revisions numbers
429 * Does not guarantee that the revision exists in the attic,
430 * only that a line with the date exists in the changelog.
431 * By default the current revision is skipped.
433 * id: the page of interest
434 * first: skip the first n changelog lines
435 * num: number of revisions to return
437 * The current revision is automatically skipped when the page exists.
438 * See $INFO['meta']['last_change'] for the current revision.
440 * For efficiency, the log lines are parsed and cached for later
441 * calls to getRevisionInfo. Large changelog files are read
442 * backwards in chunks until the requested number of changelog
443 * lines are recieved.
445 * @author Ben Coburn <btcoburn@silicodon.net>
446 * @author Kate Arzamastseva <pshns@ukr.net>
448 function getRevisions($id, $first, $num, $chunk_size=8192, $media=false) {
449 global $cache_revinfo;
450 $cache =& $cache_revinfo;
451 if (!isset($cache[$id])) { $cache[$id] = array(); }
457 $file = mediaMetaFN($id, '.changes');
459 $file = metaFN($id, '.changes');
462 $chunk_size = max($chunk_size, 0);
465 } else if (!$media && @file_exists(wikiFN($id)) || $media && @file_exists(mediaFN($id))) {
466 // skip current revision if the page exists
467 $first = max($first+1, 0);
470 if (!@file_exists($file)) { return $revs; }
471 if (filesize($file)<$chunk_size || $chunk_size==0) {
473 $lines = file($file);
474 if ($lines===false) { return $revs; }
476 // read chunks backwards
477 $fp = fopen($file, 'rb'); // "file pointer"
478 if ($fp===false) { return $revs; }
479 fseek($fp, 0, SEEK_END);
483 $finger = max($tail-$chunk_size, 0);
484 while ($count<$num+$first) {
488 fgets($fp); // slip the finger forward to a new line
492 // was the chunk big enough? if not, take another bite
493 if($nl > 0 && $tail <= $nl){
494 $finger = max($finger-$chunk_size, 0);
502 $read_size = max($tail-$finger, 0); // found chunk size
504 while ($got<$read_size && !feof($fp)) {
505 $tmp = @fread($fp, max($read_size-$got, 0));
506 if ($tmp===false) { break; } //error state
507 $got += strlen($tmp);
510 $tmp = explode("\n", $chunk);
511 array_pop($tmp); // remove trailing newline
513 // combine with previous chunk
514 $count += count($tmp);
515 $lines = array_merge($tmp, $lines);
518 if ($finger==0) { break; } // already read all the lines
521 $finger = max($tail-$chunk_size, 0);
527 // skip parsing extra lines
528 $num = max(min(count($lines)-$first, $num), 0);
529 if ($first>0 && $num>0) { $lines = array_slice($lines, max(count($lines)-$first-$num, 0), $num); }
530 else if ($first>0 && $num==0) { $lines = array_slice($lines, 0, max(count($lines)-$first, 0)); }
531 else if ($first==0 && $num>0) { $lines = array_slice($lines, max(count($lines)-$num, 0)); }
533 // handle lines in reverse order
534 for ($i = count($lines)-1; $i >= 0; $i--) {
535 $tmp = parseChangelogLine($lines[$i]);
537 $cache[$id][$tmp['date']] = $tmp;
538 $revs[] = $tmp['date'];