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-rw-r--r--lib/dokuwiki/inc/changelog.php474
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diff --git a/lib/dokuwiki/inc/changelog.php b/lib/dokuwiki/inc/changelog.php
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+<?php
+/**
+ * Changelog handling functions
+ *
+ * @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+
+// Constants for known core changelog line types.
+// Use these in place of string literals for more readable code.
+define('DOKU_CHANGE_TYPE_CREATE', 'C');
+define('DOKU_CHANGE_TYPE_EDIT', 'E');
+define('DOKU_CHANGE_TYPE_MINOR_EDIT', 'e');
+define('DOKU_CHANGE_TYPE_DELETE', 'D');
+define('DOKU_CHANGE_TYPE_REVERT', 'R');
+
+/**
+ * parses a changelog line into it's components
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function parseChangelogLine($line) {
+ $tmp = explode("\t", $line);
+ if ($tmp!==false && count($tmp)>1) {
+ $info = array();
+ $info['date'] = (int)$tmp[0]; // unix timestamp
+ $info['ip'] = $tmp[1]; // IPv4 address (127.0.0.1)
+ $info['type'] = $tmp[2]; // log line type
+ $info['id'] = $tmp[3]; // page id
+ $info['user'] = $tmp[4]; // user name
+ $info['sum'] = $tmp[5]; // edit summary (or action reason)
+ $info['extra'] = rtrim($tmp[6], "\n"); // extra data (varies by line type)
+ return $info;
+ } else { return false; }
+}
+
+/**
+ * Add's an entry to the changelog and saves the metadata for the page
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @author Esther Brunner <wikidesign@gmail.com>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function addLogEntry($date, $id, $type=DOKU_CHANGE_TYPE_EDIT, $summary='', $extra='', $flags=null){
+ global $conf, $INFO;
+
+ // check for special flags as keys
+ if (!is_array($flags)) { $flags = array(); }
+ $flagExternalEdit = isset($flags['ExternalEdit']);
+
+ $id = cleanid($id);
+ $file = wikiFN($id);
+ $created = @filectime($file);
+ $minor = ($type===DOKU_CHANGE_TYPE_MINOR_EDIT);
+ $wasRemoved = ($type===DOKU_CHANGE_TYPE_DELETE);
+
+ if(!$date) $date = time(); //use current time if none supplied
+ $remote = (!$flagExternalEdit)?clientIP(true):'127.0.0.1';
+ $user = (!$flagExternalEdit)?$_SERVER['REMOTE_USER']:'';
+
+ $strip = array("\t", "\n");
+ $logline = array(
+ 'date' => $date,
+ 'ip' => $remote,
+ 'type' => str_replace($strip, '', $type),
+ 'id' => $id,
+ 'user' => $user,
+ 'sum' => str_replace($strip, '', $summary),
+ 'extra' => str_replace($strip, '', $extra)
+ );
+
+ // update metadata
+ if (!$wasRemoved) {
+ $oldmeta = p_read_metadata($id);
+ $meta = array();
+ if (!$INFO['exists'] && empty($oldmeta['persistent']['date']['created'])){ // newly created
+ $meta['date']['created'] = $created;
+ if ($user) $meta['creator'] = $INFO['userinfo']['name'];
+ } elseif (!$INFO['exists'] && !empty($oldmeta['persistent']['date']['created'])) { // re-created / restored
+ $meta['date']['created'] = $oldmeta['persistent']['date']['created'];
+ $meta['date']['modified'] = $created; // use the files ctime here
+ $meta['creator'] = $oldmeta['persistent']['creator'];
+ if ($user) $meta['contributor'][$user] = $INFO['userinfo']['name'];
+ } elseif (!$minor) { // non-minor modification
+ $meta['date']['modified'] = $date;
+ if ($user) $meta['contributor'][$user] = $INFO['userinfo']['name'];
+ }
+ $meta['last_change'] = $logline;
+ p_set_metadata($id, $meta, true);
+ }
+
+ // add changelog lines
+ $logline = implode("\t", $logline)."\n";
+ io_saveFile(metaFN($id,'.changes'),$logline,true); //page changelog
+ io_saveFile($conf['changelog'],$logline,true); //global changelog cache
+}
+
+/**
+ * Add's an entry to the media changelog
+ *
+ * @author Michael Hamann <michael@content-space.de>
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @author Esther Brunner <wikidesign@gmail.com>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function addMediaLogEntry($date, $id, $type=DOKU_CHANGE_TYPE_EDIT, $summary='', $extra='', $flags=null){
+ global $conf, $INFO;
+
+ $id = cleanid($id);
+
+ if(!$date) $date = time(); //use current time if none supplied
+ $remote = clientIP(true);
+ $user = $_SERVER['REMOTE_USER'];
+
+ $strip = array("\t", "\n");
+ $logline = array(
+ 'date' => $date,
+ 'ip' => $remote,
+ 'type' => str_replace($strip, '', $type),
+ 'id' => $id,
+ 'user' => $user,
+ 'sum' => str_replace($strip, '', $summary),
+ 'extra' => str_replace($strip, '', $extra)
+ );
+
+ // add changelog lines
+ $logline = implode("\t", $logline)."\n";
+ io_saveFile($conf['media_changelog'],$logline,true); //global media changelog cache
+}
+
+/**
+ * returns an array of recently changed files using the
+ * changelog
+ *
+ * The following constants can be used to control which changes are
+ * included. Add them together as needed.
+ *
+ * RECENTS_SKIP_DELETED - don't include deleted pages
+ * RECENTS_SKIP_MINORS - don't include minor changes
+ * RECENTS_SKIP_SUBSPACES - don't include subspaces
+ * RECENTS_MEDIA_CHANGES - return media changes instead of page changes
+ *
+ * @param int $first number of first entry returned (for paginating
+ * @param int $num return $num entries
+ * @param string $ns restrict to given namespace
+ * @param bool $flags see above
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function getRecents($first,$num,$ns='',$flags=0){
+ global $conf;
+ $recent = array();
+ $count = 0;
+
+ if(!$num)
+ return $recent;
+
+ // read all recent changes. (kept short)
+ if ($flags & RECENTS_MEDIA_CHANGES) {
+ $lines = @file($conf['media_changelog']);
+ } else {
+ $lines = @file($conf['changelog']);
+ }
+
+
+ // handle lines
+ $seen = array(); // caches seen lines, _handleRecent() skips them
+ for($i = count($lines)-1; $i >= 0; $i--){
+ $rec = _handleRecent($lines[$i], $ns, $flags, $seen);
+ if($rec !== false) {
+ if(--$first >= 0) continue; // skip first entries
+ $recent[] = $rec;
+ $count++;
+ // break when we have enough entries
+ if($count >= $num){ break; }
+ }
+ }
+
+ return $recent;
+}
+
+/**
+ * returns an array of files changed since a given time using the
+ * changelog
+ *
+ * The following constants can be used to control which changes are
+ * included. Add them together as needed.
+ *
+ * RECENTS_SKIP_DELETED - don't include deleted pages
+ * RECENTS_SKIP_MINORS - don't include minor changes
+ * RECENTS_SKIP_SUBSPACES - don't include subspaces
+ * RECENTS_MEDIA_CHANGES - return media changes instead of page changes
+ *
+ * @param int $from date of the oldest entry to return
+ * @param int $to date of the newest entry to return (for pagination, optional)
+ * @param string $ns restrict to given namespace (optional)
+ * @param bool $flags see above (optional)
+ *
+ * @author Michael Hamann <michael@content-space.de>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function getRecentsSince($from,$to=null,$ns='',$flags=0){
+ global $conf;
+ $recent = array();
+
+ if($to && $to < $from)
+ return $recent;
+
+ // read all recent changes. (kept short)
+ if ($flags & RECENTS_MEDIA_CHANGES) {
+ $lines = @file($conf['media_changelog']);
+ } else {
+ $lines = @file($conf['changelog']);
+ }
+
+ // we start searching at the end of the list
+ $lines = array_reverse($lines);
+
+ // handle lines
+ $seen = array(); // caches seen lines, _handleRecent() skips them
+
+ foreach($lines as $line){
+ $rec = _handleRecent($line, $ns, $flags, $seen);
+ if($rec !== false) {
+ if ($rec['date'] >= $from) {
+ if (!$to || $rec['date'] <= $to) {
+ $recent[] = $rec;
+ }
+ } else {
+ break;
+ }
+ }
+ }
+
+ return array_reverse($recent);
+}
+
+/**
+ * Internal function used by getRecents
+ *
+ * don't call directly
+ *
+ * @see getRecents()
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function _handleRecent($line,$ns,$flags,&$seen){
+ if(empty($line)) return false; //skip empty lines
+
+ // split the line into parts
+ $recent = parseChangelogLine($line);
+ if ($recent===false) { return false; }
+
+ // skip seen ones
+ if(isset($seen[$recent['id']])) return false;
+
+ // skip minors
+ if($recent['type']===DOKU_CHANGE_TYPE_MINOR_EDIT && ($flags & RECENTS_SKIP_MINORS)) return false;
+
+ // remember in seen to skip additional sights
+ $seen[$recent['id']] = 1;
+
+ // check if it's a hidden page
+ if(isHiddenPage($recent['id'])) return false;
+
+ // filter namespace
+ if (($ns) && (strpos($recent['id'],$ns.':') !== 0)) return false;
+
+ // exclude subnamespaces
+ if (($flags & RECENTS_SKIP_SUBSPACES) && (getNS($recent['id']) != $ns)) return false;
+
+ // check ACL
+ $recent['perms'] = auth_quickaclcheck($recent['id']);
+ if ($recent['perms'] < AUTH_READ) return false;
+
+ // check existance
+ $fn = (($flags & RECENTS_MEDIA_CHANGES) ? mediaFN($recent['id']) : wikiFN($recent['id']));
+ if((!@file_exists($fn)) && ($flags & RECENTS_SKIP_DELETED)) return false;
+
+ return $recent;
+}
+
+/**
+ * Get the changelog information for a specific page id
+ * and revision (timestamp). Adjacent changelog lines
+ * are optimistically parsed and cached to speed up
+ * consecutive calls to getRevisionInfo. For large
+ * changelog files, only the chunk containing the
+ * requested changelog line is read.
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function getRevisionInfo($id, $rev, $chunk_size=8192) {
+ global $cache_revinfo;
+ $cache =& $cache_revinfo;
+ if (!isset($cache[$id])) { $cache[$id] = array(); }
+ $rev = max($rev, 0);
+
+ // check if it's already in the memory cache
+ if (isset($cache[$id]) && isset($cache[$id][$rev])) {
+ return $cache[$id][$rev];
+ }
+
+ $file = metaFN($id, '.changes');
+ if (!@file_exists($file)) { return false; }
+ if (filesize($file)<$chunk_size || $chunk_size==0) {
+ // read whole file
+ $lines = file($file);
+ if ($lines===false) { return false; }
+ } else {
+ // read by chunk
+ $fp = fopen($file, 'rb'); // "file pointer"
+ if ($fp===false) { return false; }
+ $head = 0;
+ fseek($fp, 0, SEEK_END);
+ $tail = ftell($fp);
+ $finger = 0;
+ $finger_rev = 0;
+
+ // find chunk
+ while ($tail-$head>$chunk_size) {
+ $finger = $head+floor(($tail-$head)/2.0);
+ fseek($fp, $finger);
+ fgets($fp); // slip the finger forward to a new line
+ $finger = ftell($fp);
+ $tmp = fgets($fp); // then read at that location
+ $tmp = parseChangelogLine($tmp);
+ $finger_rev = $tmp['date'];
+ if ($finger==$head || $finger==$tail) { break; }
+ if ($finger_rev>$rev) {
+ $tail = $finger;
+ } else {
+ $head = $finger;
+ }
+ }
+
+ if ($tail-$head<1) {
+ // cound not find chunk, assume requested rev is missing
+ fclose($fp);
+ return false;
+ }
+
+ // read chunk
+ $chunk = '';
+ $chunk_size = max($tail-$head, 0); // found chunk size
+ $got = 0;
+ fseek($fp, $head);
+ while ($got<$chunk_size && !feof($fp)) {
+ $tmp = @fread($fp, max($chunk_size-$got, 0));
+ if ($tmp===false) { break; } //error state
+ $got += strlen($tmp);
+ $chunk .= $tmp;
+ }
+ $lines = explode("\n", $chunk);
+ array_pop($lines); // remove trailing newline
+ fclose($fp);
+ }
+
+ // parse and cache changelog lines
+ foreach ($lines as $value) {
+ $tmp = parseChangelogLine($value);
+ if ($tmp!==false) {
+ $cache[$id][$tmp['date']] = $tmp;
+ }
+ }
+ if (!isset($cache[$id][$rev])) { return false; }
+ return $cache[$id][$rev];
+}
+
+/**
+ * Return a list of page revisions numbers
+ * Does not guarantee that the revision exists in the attic,
+ * only that a line with the date exists in the changelog.
+ * By default the current revision is skipped.
+ *
+ * id: the page of interest
+ * first: skip the first n changelog lines
+ * num: number of revisions to return
+ *
+ * The current revision is automatically skipped when the page exists.
+ * See $INFO['meta']['last_change'] for the current revision.
+ *
+ * For efficiency, the log lines are parsed and cached for later
+ * calls to getRevisionInfo. Large changelog files are read
+ * backwards in chunks until the requested number of changelog
+ * lines are recieved.
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function getRevisions($id, $first, $num, $chunk_size=8192) {
+ global $cache_revinfo;
+ $cache =& $cache_revinfo;
+ if (!isset($cache[$id])) { $cache[$id] = array(); }
+
+ $revs = array();
+ $lines = array();
+ $count = 0;
+ $file = metaFN($id, '.changes');
+ $num = max($num, 0);
+ $chunk_size = max($chunk_size, 0);
+ if ($first<0) { $first = 0; }
+ else if (@file_exists(wikiFN($id))) {
+ // skip current revision if the page exists
+ $first = max($first+1, 0);
+ }
+
+ if (!@file_exists($file)) { return $revs; }
+ if (filesize($file)<$chunk_size || $chunk_size==0) {
+ // read whole file
+ $lines = file($file);
+ if ($lines===false) { return $revs; }
+ } else {
+ // read chunks backwards
+ $fp = fopen($file, 'rb'); // "file pointer"
+ if ($fp===false) { return $revs; }
+ fseek($fp, 0, SEEK_END);
+ $tail = ftell($fp);
+
+ // chunk backwards
+ $finger = max($tail-$chunk_size, 0);
+ while ($count<$num+$first) {
+ fseek($fp, $finger);
+ if ($finger>0) {
+ fgets($fp); // slip the finger forward to a new line
+ $finger = ftell($fp);
+ }
+
+ // read chunk
+ if ($tail<=$finger) { break; }
+ $chunk = '';
+ $read_size = max($tail-$finger, 0); // found chunk size
+ $got = 0;
+ while ($got<$read_size && !feof($fp)) {
+ $tmp = @fread($fp, max($read_size-$got, 0));
+ if ($tmp===false) { break; } //error state
+ $got += strlen($tmp);
+ $chunk .= $tmp;
+ }
+ $tmp = explode("\n", $chunk);
+ array_pop($tmp); // remove trailing newline
+
+ // combine with previous chunk
+ $count += count($tmp);
+ $lines = array_merge($tmp, $lines);
+
+ // next chunk
+ if ($finger==0) { break; } // already read all the lines
+ else {
+ $tail = $finger;
+ $finger = max($tail-$chunk_size, 0);
+ }
+ }
+ fclose($fp);
+ }
+
+ // skip parsing extra lines
+ $num = max(min(count($lines)-$first, $num), 0);
+ if ($first>0 && $num>0) { $lines = array_slice($lines, max(count($lines)-$first-$num, 0), $num); }
+ else if ($first>0 && $num==0) { $lines = array_slice($lines, 0, max(count($lines)-$first, 0)); }
+ else if ($first==0 && $num>0) { $lines = array_slice($lines, max(count($lines)-$num, 0)); }
+
+ // handle lines in reverse order
+ for ($i = count($lines)-1; $i >= 0; $i--) {
+ $tmp = parseChangelogLine($lines[$i]);
+ if ($tmp!==false) {
+ $cache[$id][$tmp['date']] = $tmp;
+ $revs[] = $tmp['date'];
+ }
+ }
+
+ return $revs;
+}
+
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 09:33:30 +0000