backup_restore.php

<?php

/**************************************************************
"Learning with Texts" (LWT) is free and unencumbered software 
released into the PUBLIC DOMAIN.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a
compiled binary, for any purpose, commercial or non-commercial,
and by any means.

In jurisdictions that recognize copyright laws, the author or
authors of this software dedicate any and all copyright
interest in the software to the public domain. We make this
dedication for the benefit of the public at large and to the 
detriment of our heirs and successors. We intend this 
dedication to be an overt act of relinquishment in perpetuity
of all present and future rights to this software under
copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE 
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
THE SOFTWARE.

For more information, please refer to [http://unlicense.org/].
***************************************************************/

/**************************************************************
Call: backup_restore.php?....
      ... restore=xxx ... do restore 
      ... backup=xxx ... do backup 
      ... empty=xxx ... do truncate
Backup/Restore/Empty LWT Database
***************************************************************/

require_once( 'settings.inc.php' );
require_once( 'connect.inc.php' );
require_once( 'dbutils.inc.php' );
require_once( 'utilities.inc.php' );

$message = '';

if ($tbpref == '') 
	$pref = "";
else
	$pref = substr($tbpref,0,-1) . "-";

// RESTORE

if (isset($_REQUEST['restore'])) {
	if ( isset($_FILES["thefile"]) && $_FILES["thefile"]["tmp_name"] != "" && $_FILES["thefile"]["error"] == 0 ) {
		$handle = gzopen ($_FILES["thefile"]["tmp_name"], "r");
		if ($handle === FALSE) {
			$message = "Error: Restore file could not be opened";
		} // $handle not OK
		else { // $handle OK
			$message = restore_file($handle, "Database");
		} // $handle OK
	} // restore file specified
	else {
		$message = "Error: No Restore file specified";
	}
} 

// BACKUP

elseif (isset($_REQUEST['backup'])) {
	$tables = array('archivedtexts', 'archtexttags', 'feedlinks', 'languages', 'textitems2', 'newsfeeds', 'sentences', 'settings', 'tags', 'tags2', 'texts', 'texttags', 'words', 'wordtags');
	$fname = "lwt-backup-exp_version-" . $pref . date('Y-m-d-H-i-s') . ".sql.gz";
	$out = "-- " . $fname . "\n";
	foreach($tables as $table) { // foreach table
		$result = do_mysqli_query('SELECT * FROM ' . $tbpref . $table);
		$num_fields = mysqli_num_fields($result);
		$out .= "\nDROP TABLE IF EXISTS " . $table . ";\n";
		$row2 = mysqli_fetch_row(do_mysqli_query('SHOW CREATE TABLE ' . $tbpref . $table));
		$out .= str_replace($tbpref . $table, $table, str_replace("\n"," ",$row2[1])) . ";\n";
		if ($table !== 'sentences' && $table !== 'textitems2') {
			while ($row = mysqli_fetch_row($result)) { // foreach record
				$return = 'INSERT INTO ' . $table . ' VALUES(';
				for ($j=0; $j < $num_fields; $j++) { // foreach field
					$return .= convert_string_to_sqlsyntax_nonull($row[$j]);
					if ($j < ($num_fields-1)) $return .= ',';
				} // foreach field
				$out .= $return . ");\n";
			} // foreach record
		} // if
	} // foreach table
	header('Content-type: application/x-gzip');
	header("Content-disposition: attachment; filename=" . $fname);
	echo gzencode($out,9);
	exit();
}

elseif (isset($_REQUEST['orig_backup'])) {
	$tables = array('archivedtexts', 'archtexttags', 'languages', 'sentences', 'settings', 'tags', 'tags2', 'textitems', 'texts', 'texttags', 'words', 'wordtags');
	$fname = "lwt-backup-" . $pref . date('Y-m-d-H-i-s') . ".sql.gz";
	$out = "-- " . $fname . "\n";

	foreach($tables as $table) {
		if ($table == 'texts') {
				$result = do_mysqli_query('SELECT TxID, TxLgID, TxTitle, TxText, TxAnnotatedText, TxAudioURI, TxSourceURI FROM ' . $tbpref . $table);
				$num_fields = 7;
		}
		elseif ($table == 'words') {
				$result = do_mysqli_query('SELECT WoID, WoLgID, WoText, WoTextLC, WoStatus, WoTranslation, WoRomanization, WoSentence, WoCreated, WoStatusChanged, WoTodayScore, WoTomorrowScore, WoRandom FROM ' . $tbpref . $table);
				$num_fields = 13;
		}
		elseif ($table == 'languages') {
				$result = do_mysqli_query('SELECT LgID, LgName, LgDict1URI, LgDict2URI, REPLACE(LgGoogleTranslateURI,"ggl.php","*http://translate.google.com") as LgGoogleTranslateURI, LgExportTemplate, LgTextSize, LgCharacterSubstitutions, LgRegexpSplitSentences, LgExceptionsSplitSentences, LgRegexpWordCharacters, LgRemoveSpaces, LgSplitEachChar, LgRightToLeft FROM ' . $tbpref . 'languages where LgName<>""');
				$num_fields = mysqli_num_fields($result);
		}
		elseif ($table !== 'sentences' && $table !== 'textitems' && $table !== 'settings') {
				$result = do_mysqli_query('SELECT * FROM ' . $tbpref . $table);
				$num_fields = mysqli_num_fields($result);
		}
		$out .= "\nDROP TABLE IF EXISTS " . $table . ";\n";

		switch($table){
			case 'archivedtexts':
				$out .= "CREATE TABLE `archivedtexts` (   `AtID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `AtLgID` int(11) unsigned NOT NULL,   `AtTitle` varchar(200) NOT NULL,   `AtText` text NOT NULL,   `AtAnnotatedText` longtext NOT NULL,   `AtAudioURI` varchar(200) DEFAULT NULL,   `AtSourceURI` varchar(1000) DEFAULT NULL,   PRIMARY KEY (`AtID`),   KEY `AtLgID` (`AtLgID`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'archtexttags':
				$out .= "CREATE TABLE `archtexttags` (   `AgAtID` int(11) unsigned NOT NULL,   `AgT2ID` int(11) unsigned NOT NULL,   PRIMARY KEY (`AgAtID`,`AgT2ID`),   KEY `AgAtID` (`AgAtID`),   KEY `AgT2ID` (`AgT2ID`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'languages':
				$out .= "CREATE TABLE `languages` (   `LgID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `LgName` varchar(40) NOT NULL,   `LgDict1URI` varchar(200) NOT NULL,   `LgDict2URI` varchar(200) DEFAULT NULL,   `LgGoogleTranslateURI` varchar(200) DEFAULT NULL,   `LgExportTemplate` varchar(1000) DEFAULT NULL,   `LgTextSize` int(5) unsigned NOT NULL DEFAULT '100',   `LgCharacterSubstitutions` varchar(500) NOT NULL,   `LgRegexpSplitSentences` varchar(500) NOT NULL,   `LgExceptionsSplitSentences` varchar(500) NOT NULL,   `LgRegexpWordCharacters` varchar(500) NOT NULL,   `LgRemoveSpaces` int(1) unsigned NOT NULL DEFAULT '0',   `LgSplitEachChar` int(1) unsigned NOT NULL DEFAULT '0',   `LgRightToLeft` int(1) unsigned NOT NULL DEFAULT '0',   PRIMARY KEY (`LgID`),   UNIQUE KEY `LgName` (`LgName`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'sentences':
				$out .= "CREATE TABLE `sentences` (   `SeID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `SeLgID` int(11) unsigned NOT NULL,   `SeTxID` int(11) unsigned NOT NULL,   `SeOrder` int(11) unsigned NOT NULL,   `SeText` text,   PRIMARY KEY (`SeID`),   KEY `SeLgID` (`SeLgID`),   KEY `SeTxID` (`SeTxID`),   KEY `SeOrder` (`SeOrder`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'settings':
				$out .= "CREATE TABLE `settings` (   `StKey` varchar(40) NOT NULL,   `StValue` varchar(40) DEFAULT NULL,   PRIMARY KEY (`StKey`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'tags':
				$out .= "CREATE TABLE `tags` (   `TgID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `TgText` varchar(20) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,   `TgComment` varchar(200) NOT NULL DEFAULT '',   PRIMARY KEY (`TgID`),   UNIQUE KEY `TgText` (`TgText`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'tags2':
				$out .= "CREATE TABLE `tags2` (   `T2ID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `T2Text` varchar(20) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,   `T2Comment` varchar(200) NOT NULL DEFAULT '',   PRIMARY KEY (`T2ID`),   UNIQUE KEY `T2Text` (`T2Text`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'textitems':
				$out .= "CREATE TABLE `textitems` (   `TiID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `TiLgID` int(11) unsigned NOT NULL,   `TiTxID` int(11) unsigned NOT NULL,   `TiSeID` int(11) unsigned NOT NULL,   `TiOrder` int(11) unsigned NOT NULL,   `TiWordCount` int(1) unsigned NOT NULL,   `TiText` varchar(250) NOT NULL,   `TiTextLC` varchar(250) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,   `TiIsNotWord` tinyint(1) NOT NULL,   PRIMARY KEY (`TiID`),   KEY `TiLgID` (`TiLgID`),   KEY `TiTxID` (`TiTxID`),   KEY `TiSeID` (`TiSeID`),   KEY `TiOrder` (`TiOrder`),   KEY `TiTextLC` (`TiTextLC`),   KEY `TiIsNotWord` (`TiIsNotWord`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'texts':
				$out .= "CREATE TABLE `texts` (   `TxID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `TxLgID` int(11) unsigned NOT NULL,   `TxTitle` varchar(200) NOT NULL,   `TxText` text NOT NULL,   `TxAnnotatedText` longtext NOT NULL,   `TxAudioURI` varchar(200) DEFAULT NULL,   `TxSourceURI` varchar(1000) DEFAULT NULL,   PRIMARY KEY (`TxID`),   KEY `TxLgID` (`TxLgID`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'texttags':
				$out .= "CREATE TABLE `texttags` (   `TtTxID` int(11) unsigned NOT NULL,   `TtT2ID` int(11) unsigned NOT NULL,   PRIMARY KEY (`TtTxID`,`TtT2ID`),   KEY `TtTxID` (`TtTxID`),   KEY `TtT2ID` (`TtT2ID`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'words':
				$out .= "CREATE TABLE `words` (   `WoID` int(11) unsigned NOT NULL AUTO_INCREMENT,   `WoLgID` int(11) unsigned NOT NULL,   `WoText` varchar(250) NOT NULL,   `WoTextLC` varchar(250) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,   `WoStatus` tinyint(4) NOT NULL,   `WoTranslation` varchar(500) NOT NULL DEFAULT '*',   `WoRomanization` varchar(100) DEFAULT NULL,   `WoSentence` varchar(1000) DEFAULT NULL,   `WoCreated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,   `WoStatusChanged` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',   `WoTodayScore` double NOT NULL DEFAULT '0',   `WoTomorrowScore` double NOT NULL DEFAULT '0',   `WoRandom` double NOT NULL DEFAULT '0',   PRIMARY KEY (`WoID`),   UNIQUE KEY `WoLgIDTextLC` (`WoLgID`,`WoTextLC`),   KEY `WoLgID` (`WoLgID`),   KEY `WoStatus` (`WoStatus`),   KEY `WoTextLC` (`WoTextLC`),   KEY `WoTranslation` (`WoTranslation`(333)),   KEY `WoCreated` (`WoCreated`),   KEY `WoStatusChanged` (`WoStatusChanged`),   KEY `WoTodayScore` (`WoTodayScore`),   KEY `WoTomorrowScore` (`WoTomorrowScore`),   KEY `WoRandom` (`WoRandom`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
			case 'wordtags':
				$out .= "CREATE TABLE `wordtags` (   `WtWoID` int(11) unsigned NOT NULL,   `WtTgID` int(11) unsigned NOT NULL,   PRIMARY KEY (`WtWoID`,`WtTgID`),   KEY `WtTgID` (`WtTgID`),   KEY `WtWoID` (`WtWoID`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;\n";
				break;
		}

		if ($table !== 'sentences' && $table !== 'textitems' && $table !== 'settings') {
			while ($row = mysqli_fetch_row($result)) { // foreach record
				$return = 'INSERT INTO ' . $table . ' VALUES(';
				for ($j=0; $j < $num_fields; $j++) { // foreach field
					$return .= convert_string_to_sqlsyntax_nonull($row[$j]);
					if ($j < ($num_fields-1)) $return .= ',';
				} // foreach field
				$out .= $return . ");\n";
			} // foreach record
		} // if
	} // foreach table

	header('Content-type: application/x-gzip');
	header("Content-disposition: attachment; filename=" . $fname);
	echo gzencode($out,9);
	exit();
}

// EMPTY

elseif (isset($_REQUEST['empty'])) {
	$dummy = runsql('TRUNCATE ' . $tbpref . 'archivedtexts','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'archtexttags','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'feedlinks','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'languages','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'textitems2','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'newsfeeds','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'sentences','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'tags','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'tags2','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'texts','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'texttags','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'words','');
	$dummy = runsql('TRUNCATE ' . $tbpref . 'wordtags', '');
	$dummy = runsql('DELETE FROM ' . $tbpref . 'settings where StKey = \'currenttext\'', '');
	optimizedb();
	get_tags($refresh = 1);
	get_texttags($refresh = 1);
	$message = "Database content has been deleted (but settings have been kept)";
}

pagestart('Backup/Restore/Empty Database',true);

echo error_message_with_hide($message,1);

if ($tbpref == '') 
	$prefinfo = "(Default Table Set)";
else
	$prefinfo = "(Table Set: <i>" . tohtml(substr($tbpref,0,-1)) . "</i>)";

?>
<form enctype="multipart/form-data" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" onsubmit="return confirm('Are you sure?');">
<table class="tab1" cellspacing="0" cellpadding="5">
<tr>
<th class="th1 center">Backup</th>
<td class="td1">
<p class="smallgray2">
The database <i><?php echo tohtml($dbname); ?></i> <?php echo $prefinfo; ?> will be exported to a gzipped SQL file.<br />Please keep this file in a safe place.<br />If necessary, you can recreate the database via the Restore function below.<br /> The OFFICIAL LWT Backup doesn't include newsfeeds, saved text positions and settings.<br />Important: If the backup file is too large, the restore may not be possible (see limits below).</p>
<p class="right">&nbsp;<br /><input type="submit" name="orig_backup" value="Download OFFICIAL LWT Backup" /><input type="submit" name="backup" value="Download LWT Backup" /></p>
</td>
</tr>
<tr>
<th class="th1 center">Restore</th>
<td class="td1">
<p class="smallgray2">
The database <i><?php echo tohtml($dbname); ?></i> <?php echo $prefinfo; ?> will be <b>replaced</b> by the data in the specified backup file<br />(gzipped or normal SQL file, created above).<br /><br /><span class="smallgray">Important: If the backup file is too large, the restore may not be possible.<br />Upload limits (in bytes): <b>post_max_size = <?php echo ini_get('post_max_size'); ?> / upload_max_filesize = <?php echo ini_get('upload_max_filesize'); ?></b><br />
If needed, increase in "<?php echo tohtml(php_ini_loaded_file()); ?>" and restart server.<br />&nbsp;</span></p>
<p><input name="thefile" type="file" /></p>
<p class="right">&nbsp;<br /><span class="red2">YOU MAY LOSE DATA - BE CAREFUL: &nbsp; &nbsp; &nbsp;</span> 
<input type="submit" name="restore" value="Restore from LWT Backup" /></p>
</td>
</tr>
<tr>
<th class="th1 center">Install<br />LWT<br />Demo</th>
<td class="td1">
<p class="smallgray2">
The database <i><?php echo tohtml($dbname); ?></i> <?php echo $prefinfo; ?> will be <b>replaced</b> by the LWT demo database.</p>
<p class="right">&nbsp;<br /> 
<input type="button" value="Install LWT Demo Database" onclick="location.href='install_demo.php';" />
</td>
</tr>
<tr>
<th class="th1 center">Empty<br />Database</th>
<td class="td1">
<p class="smallgray2">
Empty (= <b>delete</b> the contents of) all tables - except the Settings - of your database <i><?php echo tohtml($dbname); ?></i> <?php echo $prefinfo; ?>.</p>
<p class="right">&nbsp;<br /><span class="red2">YOU MAY LOSE DATA - BE CAREFUL: &nbsp; &nbsp; &nbsp;</span>
<input type="submit" name="empty" value="Empty LWT Database" />
</td>
</tr>
<tr>
<td class="td1 right" colspan="2"> 
<input type="button" value="&lt;&lt; Back" onclick="location.href='index.php';" /></td>
</tr>
</table>
</form>

<?php

pageend();

?>