diff --git a/inc/changelog.php b/inc/changelog.php
index f7b07ae579912d9bbc2e6d70373df977ad87ae3b..36be9dc79f8dc05d40eb2082d01653a4668825a2 100644
--- a/inc/changelog.php
+++ b/inc/changelog.php
@@ -334,399 +334,488 @@ function _handleRecent($line,$ns,$flags,&$seen){
}
/**
- * 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>
- * @author Kate Arzamastseva <pshns@ukr.net>
+ * Class PageRevisionLog
*/
-function getRevisionInfo($id, $rev, $chunk_size=8192, $media=false) {
- 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][$rev];
- }
-
- if ($media) {
- $file = mediaMetaFN($id, '.changes');
- } else {
- $file = metaFN($id, '.changes');
- }
+class PageRevisionLog {
+
+ /** @var string */
+ private $id;
+ /** @var int */
+ private $chunk_size;
+ /** @var array */
+ private $cache;
+
+ /**
+ * Constructor
+ *
+ * @param string $id page id
+ * @param int $chunk_size maximum block size read from file
+ */
+ public function __construct($id, $chunk_size = 8192) {
+ global $cache_revinfo;
+
+ $this->cache =& $cache_revinfo;
+ if(!isset($this->cache[$id])) {
+ $this->cache[$id] = array();
+ }
- //read lines from changelog
- list($fp, $lines) = _readloglines($file, $rev, $chunk_size);
- if($fp) {
- fclose($fp);
- }
- if(empty($lines)) return false;
+ $this->id = $id;
+ $this->setChunkSize($chunk_size);
- // 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 $INFO['meta']['last_change'] for the current revision.
- *
- * For efficiency, the log lines are parsed and cached for later
- * calls to getRevisionInfo. Large changelog files are read
- * backwards in chunks until the requested number of changelog
- * lines are recieved.
- *
- * @author Ben Coburn <btcoburn@silicodon.net>
- * @author Kate Arzamastseva <pshns@ukr.net>
- */
-function getRevisions($id, $first, $num, $chunk_size=8192, $media=false) {
- global $cache_revinfo;
- $cache =& $cache_revinfo;
- if (!isset($cache[$id])) { $cache[$id] = array(); }
+ /**
+ * Set chunk size for file reading
+ *
+ * @param int $chunk_size maximum block size read from file
+ */
+ public function setChunkSize($chunk_size) {
+ if(!is_numeric($chunk_size)) $chunk_size = 0;
- $revs = array();
- $lines = array();
- $count = 0;
- if ($media) {
- $file = mediaMetaFN($id, '.changes');
- } else {
- $file = metaFN($id, '.changes');
- }
- $num = max($num, 0);
- if ($num == 0) { return $revs; }
-
- $chunk_size = max($chunk_size, 0);
- if ($first<0) {
- $first = 0;
- } else if (!$media && @file_exists(wikiFN($id)) || $media && @file_exists(mediaFN($id))) {
- // skip current revision if the page exists
- $first = max($first+1, 0);
+ $this->chunk_size = (int) max($chunk_size, 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);
- $nl = $finger;
- if ($finger>0) {
- fgets($fp); // slip the finger forward to a new line
- $nl = ftell($fp);
- }
+ /**
+ * 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.
+ *
+ * @param int $rev revision timestamp
+ * @param bool $media look into media log?
+ * @return bool|array false or array with entries:
+ * - date: unix timestamp
+ * - ip: IPv4 address (127.0.0.1)
+ * - type: log line type
+ * - id: page id
+ * - user: user name
+ * - sum: edit summary (or action reason)
+ * - extra: extra data (varies by line type)
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ * @author Kate Arzamastseva <pshns@ukr.net>
+ */
+ public function getRevisionInfo($rev, $media = false) {
+ $rev = max($rev, 0);
+
+ // check if it's already in the memory cache
+ if(isset($this->cache[$this->id]) && isset($this->cache[$this->id][$rev])) {
+ return $this->cache[$this->id][$rev];
+ }
- // was the chunk big enough? if not, take another bite
- if($nl > 0 && $tail <= $nl){
- $finger = max($finger-$chunk_size, 0);
- continue;
- }else{
- $finger = $nl;
- }
+ //read lines from changelog
+ list($fp, $lines) = $this->readloglines($media, $rev);
+ if($fp) {
+ fclose($fp);
+ }
+ if(empty($lines)) return false;
- // read chunk
- $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-$chunk_size, 0);
+ // parse and cache changelog lines
+ foreach($lines as $value) {
+ $tmp = parseChangelogLine($value);
+ if($tmp !== false) {
+ $this->cache[$this->id][$tmp['date']] = $tmp;
}
}
- fclose($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[] = $tmp['date'];
+ if(!isset($this->cache[$this->id][$rev])) {
+ return false;
}
+ return $this->cache[$this->id][$rev];
}
- return $revs;
-}
+ /**
+ * 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.
+ *
+ * The current revision is automatically skipped when the page exists.
+ * See $INFO['meta']['last_change'] for the current revision.
+ * A negative $first let read the current revision too.
+ *
+ * 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.
+ *
+ * @param int $first skip the first n changelog lines
+ * @param int $num number of revisions to return
+ * @param bool $media look into media log?
+ * @return array with the revision timestamps
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ * @author Kate Arzamastseva <pshns@ukr.net>
+ */
+ public function getRevisions($first, $num, $media = false) {
+ $revs = array();
+ $lines = array();
+ $count = 0;
+ if ($media) {
+ $file = mediaMetaFN($this->id, '.changes');
+ } else {
+ $file = metaFN($this->id, '.changes');
+ }
+ $num = max($num, 0);
+ if ($num == 0) { return $revs; }
+
+ $this->chunk_size = max($this->chunk_size, 0);
+ if ($first<0) {
+ $first = 0;
+ } else if (!$media && @file_exists(wikiFN($this->id)) || $media && @file_exists(mediaFN($this->id))) {
+ // skip current revision if the page exists
+ $first = max($first+1, 0);
+ }
-/**
- * Get the nth revision left or right handside for a specific page id
- * and revision (timestamp). For large changelog files, only the chunk containing the
- * reference revision $rev is read and sometimes a next chunck.
- *
- * Adjacent changelog lines are optimistically parsed and cached to speed up
- * consecutive calls to getRevisionInfo.
- *
- * @author Gerrit Uitslag <klapinklapin@gmail.com>
- *
- * based on getRevisionInfo by
- * @author Ben Coburn <btcoburn@silicodon.net>
- * @author Kate Arzamastseva <pshns@ukr.net>
- *
- * @param string $id pageid
- * @param int $rev revision timestamp used as startdate (doesn't need to be revisionnumber)
- * @param int $direction give position of returned revision with respect to $rev; positive=next, negative=prev
- * @param int $chunk_size maximum block size
- * @param bool $media
- * @return bool|string
- */
-function getRelativeRevision($id, $rev, $direction, $chunk_size = 8192, $media = false) {
- global $cache_revinfo;
- global $INFO;
- $cache =& $cache_revinfo;
- if(!isset($cache[$id])) {
- $cache[$id] = array();
- }
- $rev = max($rev, 0);
- $direction = (int) $direction;
-
- //no direction given or last rev, so no follow-up
- if(!$direction ||
- ($direction > 0
- && isset($INFO['meta']['last_change']['date'])
- && $rev == $INFO['meta']['last_change']['date'])) {
- return false;
- }
+ if (!@file_exists($file)) { return $revs; }
+ if (filesize($file)<$this->chunk_size || $this->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-$this->chunk_size, 0);
+ while ($count<$num+$first) {
+ fseek($fp, $finger);
+ $nl = $finger;
+ if ($finger>0) {
+ fgets($fp); // slip the finger forward to a new line
+ $nl = ftell($fp);
+ }
- if($media) {
- $file = mediaMetaFN($id, '.changes');
- } else {
- $file = metaFN($id, '.changes');
- }
+ // was the chunk big enough? if not, take another bite
+ if($nl > 0 && $tail <= $nl){
+ $finger = max($finger-$this->chunk_size, 0);
+ continue;
+ }else{
+ $finger = $nl;
+ }
- //get lines from changelog
- list($fp, $lines, $head, $tail, $eof) = _readloglines($file, $rev, $chunk_size);
- if(empty($lines)) return false;
-
- // look for revisions later/earlier then $rev, when founded count till the wanted revision is reached
- // also parse and cache changelog lines for getRevisionInfo().
- $revcounter = 0;
- $relativerev = false;
- $checkotherchunck = true; //always runs once
- while(!$relativerev && $checkotherchunck) {
- $tmp = array();
- //parse in normal or reverse order
- $count = count($lines);
- if($direction > 0) {
- $start = 0;
- $step = 1;
- } else {
- $start = $count - 1;
- $step = -1;
+ // read chunk
+ $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-$this->chunk_size, 0);
+ }
+ }
+ fclose($fp);
}
- for($i = $start; $i >= 0 && $i < $count; $i = $i + $step) {
+
+ // 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;
- //look for revs older/earlier then reference $rev and select $direction-th one
- if(($direction > 0 && $tmp['date'] > $rev) || ($direction < 0 && $tmp['date'] < $rev)) {
- $revcounter++;
- if($revcounter == abs($direction)) {
- $relativerev = $tmp['date'];
- }
- }
+ if ($tmp!==false) {
+ $this->cache[$this->id][$tmp['date']] = $tmp;
+ $revs[] = $tmp['date'];
}
}
- //true when $rev is found, but not the wanted follow-up.
- $checkotherchunck = $fp
- && ($tmp['date'] == $rev || ($revcounter > 0 && !$relativerev))
- && !(($tail == $eof && $direction > 0) || ($head == 0 && $direction < 0));
+ return $revs;
+ }
+
+ /**
+ * Get the nth revision left or right handside for a specific page id and revision (timestamp)
+ *
+ * For large changelog files, only the chunk containing the
+ * reference revision $rev is read and sometimes a next chunck.
+ *
+ * Adjacent changelog lines are optimistically parsed and cached to speed up
+ * consecutive calls to getRevisionInfo.
+ *
+ * @param int $rev revision timestamp used as startdate (doesn't need to be revisionnumber)
+ * @param int $direction give position of returned revision with respect to $rev; positive=next, negative=prev
+ * @param bool $media look into media log?
+ * @return bool|int
+ * timestamp of the requested revision
+ * otherwise false
+ */
+ public function getRelativeRevision($rev, $direction, $media = false) {
+ global $INFO;
+
+ $rev = max($rev, 0);
+ $direction = (int) $direction;
+
+ //no direction given or last rev, so no follow-up
+ if(!$direction ||
+ ($direction > 0
+ && isset($INFO['meta']['last_change']['date'])
+ && $rev == $INFO['meta']['last_change']['date'])) {
+ return false;
+ }
- if($checkotherchunck) {
- //search bounds of chunck, rounded on new line, but smaller than $chunck_size
+ //get lines from changelog
+ list($fp, $lines, $head, $tail, $eof) = $this->readloglines($media, $rev);
+ if(empty($lines)) return false;
+
+ // look for revisions later/earlier then $rev, when founded count till the wanted revision is reached
+ // also parse and cache changelog lines for getRevisionInfo().
+ $revcounter = 0;
+ $relativerev = false;
+ $checkotherchunck = true; //always runs once
+ while(!$relativerev && $checkotherchunck) {
+ $tmp = array();
+ //parse in normal or reverse order
+ $count = count($lines);
if($direction > 0) {
- $head = $tail;
- $lookpointer = true;
- $tail = $head + floor($chunk_size * (2 / 3));
- while($lookpointer) {
- $tail = min($tail, $eof);
- $tail = _getNewlinepointer($fp, $tail);
- $lookpointer = $tail - $head > $chunk_size;
- if($lookpointer) {
- $tail = $head + floor(($tail - $head) / 2);
+ $start = 0;
+ $step = 1;
+ } else {
+ $start = $count - 1;
+ $step = -1;
+ }
+ for($i = $start; $i >= 0 && $i < $count; $i = $i + $step) {
+ $tmp = parseChangelogLine($lines[$i]);
+ if($tmp !== false) {
+ $this->cache[$this->id][$tmp['date']] = $tmp;
+ //look for revs older/earlier then reference $rev and select $direction-th one
+ if(($direction > 0 && $tmp['date'] > $rev) || ($direction < 0 && $tmp['date'] < $rev)) {
+ $revcounter++;
+ if($revcounter == abs($direction)) {
+ $relativerev = $tmp['date'];
+ }
}
- if($tail == $head) break;
}
- } else {
- $tail = $head;
- $head = max($tail - $chunk_size, 0);
- $head = _getNewlinepointer($fp, $head);
}
- //load next chunck
- $lines = _readChunk($fp, $head, $tail);
- if(empty($lines)) break;
+ //true when $rev is found, but not the wanted follow-up.
+ $checkotherchunck = $fp
+ && ($tmp['date'] == $rev || ($revcounter > 0 && !$relativerev))
+ && !(($tail == $eof && $direction > 0) || ($head == 0 && $direction < 0));
+
+ if($checkotherchunck) {
+ //search bounds of chunck, rounded on new line, but smaller than $chunck_size
+ if($direction > 0) {
+ $head = $tail;
+ $lookpointer = true;
+ $tail = $head + floor($this->chunk_size * (2 / 3));
+ while($lookpointer) {
+ $tail = min($tail, $eof);
+ $tail = $this->getNewlinepointer($fp, $tail);
+ $lookpointer = $tail - $head > $this->chunk_size;
+ if($lookpointer) {
+ $tail = $head + floor(($tail - $head) / 2);
+ }
+ if($tail == $head) break;
+ }
+ } else {
+ $tail = $head;
+ $head = max($tail - $this->chunk_size, 0);
+ $head = $this->getNewlinepointer($fp, $head);
+ }
+
+ //load next chunck
+ $lines = $this->readChunk($fp, $head, $tail);
+ if(empty($lines)) break;
+ }
+ }
+ if($fp) {
+ fclose($fp);
}
- }
- if($fp) {
- fclose($fp);
- }
- if(isset($INFO['meta']['last_change']) && $relativerev == $INFO['meta']['last_change']['date']) {
- return 'current';
+ return $relativerev;
}
- return $relativerev;
-}
-/**
- * get lines from changelog.
- * If file larger than $chuncksize, only chunck is read that could contain $rev.
- *
- * @param int $file path to changelog file
- * @param int $rev revision timestamp
- * @param int $chunk_size maximum block size read from file
- * @return array(fp, array(changeloglines), $head, $tail, $eof)|bool
- * returns false when not succeed. fp only defined for chuck reading, needs closing.
- */
-function _readloglines($file, $rev, $chunk_size) {
- if(!@file_exists($file)) {
- return false;
- }
- $fp = null;
- $head = 0;
- $tail = 0;
- $eof = 0;
- if(filesize($file) < $chunk_size || $chunk_size == 0) {
- // read whole file
- $lines = file($file);
- if($lines === false) {
- return false;
+ /**
+ * Returns lines from changelog.
+ * If file larger than $chuncksize, only chunck is read that could contain $rev.
+ *
+ * @param bool $media look into media log?
+ * @param int $rev revision timestamp
+ * @return array(fp, array(changeloglines), $head, $tail, $eof)|bool
+ * returns false when not succeed. fp only defined for chuck reading, needs closing.
+ */
+ protected function readloglines($media, $rev) {
+ if($media) {
+ $file = mediaMetaFN($this->id, '.changes');
+ } else {
+ $file = metaFN($this->id, '.changes');
}
- } else {
- // read by chunk
- $fp = fopen($file, 'rb'); // "file pointer"
- if($fp === false) {
+
+ if(!@file_exists($file)) {
return false;
}
- $head = 0;
- fseek($fp, 0, SEEK_END);
- $eof = ftell($fp);
- $tail = $eof;
- $finger = 0;
- $finger_rev = 0;
-
- // find chunk
- while($tail - $head > $chunk_size) {
- $finger = $head + floor(($tail - $head) / 2.0);
- $finger = _getNewlinepointer($fp, $finger);
- $tmp = fgets($fp);
- $tmp = parseChangelogLine($tmp);
- $finger_rev = $tmp['date'];
- if($finger == $head || $finger == $tail) {
- break;
+
+ $fp = null;
+ $head = 0;
+ $tail = 0;
+ $eof = 0;
+
+ if(filesize($file) < $this->chunk_size || $this->chunk_size == 0) {
+ // read whole file
+ $lines = file($file);
+ if($lines === false) {
+ return false;
}
- if($finger_rev > $rev) {
- $tail = $finger;
- } else {
- $head = $finger;
+ } else {
+ // read by chunk
+ $fp = fopen($file, 'rb'); // "file pointer"
+ if($fp === false) {
+ return false;
+ }
+ $head = 0;
+ fseek($fp, 0, SEEK_END);
+ $eof = ftell($fp);
+ $tail = $eof;
+
+ // find chunk
+ while($tail - $head > $this->chunk_size) {
+ $finger = $head + floor(($tail - $head) / 2.0);
+ $finger = $this->getNewlinepointer($fp, $finger);
+ $tmp = fgets($fp);
+ $tmp = parseChangelogLine($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;
}
+
+ $lines = $this->readChunk($fp, $head, $tail);
}
+ return array(
+ $fp,
+ $lines,
+ $head,
+ $tail,
+ $eof
+ );
+ }
- if($tail - $head < 1) {
- // cound not find chunk, assume requested rev is missing
- fclose($fp);
- return false;
+ /**
+ * Read chunk and return array with lines of given chunck.
+ * Has no check if $head and $tail are really at a new line
+ *
+ * @param $fp resource filepointer
+ * @param $head int start point chunck
+ * @param $tail int end point chunck
+ * @return array lines read from chunck
+ */
+ protected function readChunk($fp, $head, $tail) {
+ $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) { //error state
+ break;
+ }
+ $got += strlen($tmp);
+ $chunk .= $tmp;
}
+ $lines = explode("\n", $chunk);
+ array_pop($lines); // remove trailing newline
+ return $lines;
+ }
- $lines = _readChunk($fp, $head, $tail);
+ /**
+ * Set pointer to first new line after $finger and return its position
+ *
+ * @param $fp resource filepointer
+ * @param $finger int a pointer
+ * @return int pointer
+ */
+ protected function getNewlinepointer($fp, $finger) {
+ fseek($fp, $finger);
+ fgets($fp); // slip the finger forward to a new line
+ return ftell($fp);
+ }
+
+ /**
+ * Check whether given revision is the current page
+ *
+ * @param int $rev timestamp of current page
+ * @return bool true if $rev is current revision, otherwise false
+ */
+ static public function isCurrentRevision($rev){
+ return isset($INFO['meta']['last_change']) && $rev == $INFO['meta']['last_change']['date'];
}
- return array(
- $fp,
- $lines,
- $head,
- $tail,
- $eof
- );
}
/**
- * Read chunk and return array with lines of given chunck.
- * Has no check if $head and $tail are really at a new line
+ * 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.
*
- * @param $fp resource filepointer
- * @param $head int start point chunck
- * @param $tail int end point chunck
- * @return array lines read from chunck
+ * @deprecated 20-11-2013
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ * @author Kate Arzamastseva <pshns@ukr.net>
*/
-function _readChunk($fp, $head, $tail) {
- $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) { //error state
- break;
- }
- $got += strlen($tmp);
- $chunk .= $tmp;
- }
- $lines = explode("\n", $chunk);
- array_pop($lines); // remove trailing newline
- return $lines;
+function getRevisionInfo($id, $rev, $chunk_size=8192, $media=false) {
+
+ $log = new PageRevisionLog($id, $chunk_size);
+ return $log->getRevisionInfo($rev, $media);
}
/**
- * Set pointer to first new line after $finger and return its position
+ * 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.
+ *
+ * @deprecated 20-11-2013
*
- * @param $fp resource filepointer
- * @param $finger int a pointer
- * @return int pointer
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ * @author Kate Arzamastseva <pshns@ukr.net>
*/
-function _getNewlinepointer($fp, $finger) {
- fseek($fp, $finger);
- fgets($fp); // slip the finger forward to a new line
- return ftell($fp);
+function getRevisions($id, $first, $num, $chunk_size=8192, $media=false) {
+ $log = new PageRevisionLog($id, $chunk_size);
+ return $log->getRevisions($first, $num, $media);
}