2 if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
3 /*********************************************************************************
4 * SugarCRM is a customer relationship management program developed by
5 * SugarCRM, Inc. Copyright (C) 2004-2011 SugarCRM Inc.
7 * This program is free software; you can redistribute it and/or modify it under
8 * the terms of the GNU Affero General Public License version 3 as published by the
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14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
19 * You should have received a copy of the GNU Affero General Public License along with
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36 ********************************************************************************/
39 require_once 'modules/ModuleBuilder/parsers/constants.php' ;
44 private $_dirname ; // base directory for the history files
45 private $_basename ; // base name for a history file, for example, listviewdef.php
46 private $_list ; // the history - a list of history files
48 private $_previewFilename ; // the location of a file for preview
52 * @param string $previewFilename The filename which the caller expects for a preview file
54 function __construct ($previewFilename )
56 $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . "->__construct( {$previewFilename} )" ) ;
57 $this->_previewFilename = $previewFilename ;
58 $this->_list = array ( ) ;
60 $this->_dirname = dirname ( $this->_previewFilename ) ;
61 // create the history directory if it does not already exist
62 if (! is_dir ( $this->_dirname ))
64 mkdir_recursive ( $this->_dirname ) ;
66 $this->_basename = basename ( $this->_previewFilename ) ;
67 // Reconstruct the history from the saved files
68 foreach ( scandir ( $this->_dirname ) as $filename )
70 if ($filename != "." && $filename != "..")
72 // history files are of the form {$basename}_{$timestamp}
73 if (preg_match ( '/(' . $this->_basename . ')_(.*)/', $filename, $matches ) == 1)
75 $this->_list [ $matches [ 2 ] ] = $matches [ 2 ] ;
79 // now sort the files, oldest first
80 if (count ( $this->_list ) > 0)
82 ksort ( $this->_list ) ;
88 * Get the most recent item in the history
89 * @return timestamp of the first item
93 return count ( $this->_list ) ;
97 * Get the most recent item in the history
98 * @return timestamp of the first item
102 return end ( $this->_list ) ;
106 * Get the oldest item in the history (the default layout)
107 * @return timestamp of the last item
111 return reset ( $this->_list ) ;
115 * Get the next oldest item in the history
116 * @return timestamp of the next item
120 return prev ( $this->_list ) ;
124 * Get the nth item in the history (where the zeroeth record is the most recent)
125 * @return timestamp of the nth item
127 function getNth ($index)
129 $value = end ( $this->_list ) ;
131 while ( $i < $index )
133 $value = prev ( $this->_list ) ;
140 * Add an item to the history
141 * @return String A GMT Unix timestamp for this newly added item
143 function append ($path)
145 // make sure we don't have a duplicate filename - highly unusual as two people should not be using Studio/MB concurrently, but when testing quite possible to do two appends within one second...
146 // because so unlikely in normal use we handle this the naive way by waiting a second so our naming scheme doesn't get overelaborated
149 $now = TimeDate::getInstance()->getNow();
150 //$time = $now->format('c');
151 $time = $now->__get('ts');
152 while ( (file_exists ( $this->_previewFilename . "_" . $time ) && $retries < 5) )
154 $now->modify("+1 second");
155 $time = $now->__get('ts');
158 // now we have a unique filename, copy the file into the history
159 copy ( $path, $this->_previewFilename . "_" . $time ) ;
160 $this->_list [ $time ] = $time ;
162 // finally, trim the number of files we're holding in the history to that specified in the configuration
163 $max_history = (isset ( $GLOBALS [ 'sugar_config' ] [ 'studio_max_history' ] )) ? $GLOBALS [ 'sugar_config' ] [ 'studio_max_history' ] : 50 ;
164 $count = count ( $this->_list ) ;
165 // truncate the oldest files, keeping only the most recent $GLOBALS['sugar_config']['studio_max_history'] files (zero=keep them all)
166 if (($max_history != 0) && ($count > $max_history))
168 // most recent files are at the end of the list, so we strip out the first count-max_history records
169 // can't just use array_shift because it renumbers numeric keys (our timestamp keys) to start from zero...
170 for ( $i = 0 ; $i < $count - $max_history ; $i ++ )
172 $timestamp = reset ( $this->_list ) ;
173 unset ( $this->_list [ $timestamp ] ) ;
174 if (! unlink ( $this->_dirname . "/" . $this->_basename . "_" . $timestamp ))
176 $GLOBALS [ 'log' ]->warn ( "History.php: unable to remove history file {$this->_basename}_$timestamp from directory {$this->_dirname} - permissions problem?" ) ;
181 // finally, remove any history preview file that might be lurking around - as soon as we append a new record it supercedes any old preview, so that must be removed (bug 20130)
182 if (file_exists($this->_previewFilename))
184 $GLOBALS [ 'log' ]->debug( get_class($this)."->append(): removing old history file at {$this->_previewFilename}");
185 unlink ( $this->_previewFilename);
192 * Restore the historical layout identified by timestamp
193 * @param Unix timestamp $timestamp GMT Timestamp of the layout to recover
194 * @return GMT Timestamp if successful, null if failure (if the file could not be copied for some reason)
196 function restoreByTimestamp ($timestamp)
198 $filename = $this->_previewFilename . "_" . $timestamp ;
199 $GLOBALS [ 'log' ]->debug ( get_class ( $this ) . ": restoring from $filename to {$this->_previewFilename}" ) ;
201 if (file_exists ( $filename ))
203 copy ( $filename, $this->_previewFilename ) ;
210 * Undo the restore - revert back to the layout before the restore
212 function undoRestore ()
214 if (file_exists ( $this->_previewFilename ))
216 unlink ( $this->_previewFilename ) ;