history1.php

一款基于PHP的网络日记程序。WikyBlog支持：多用户的 BLOG

<?php
//$lang checked

defined('WikyBlog') or die("Not an entry point...");

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//					HISTORY INSTRUCTIONS
//

function run_Instructions_main($source,$instructions){
	
	if( empty($instructions) ){
		return $source;
	}
	
	//	1)	Set sourceArray
	$type = null;
	if( is_object($source) ){
		//$type = get_class( $source );
		$resultArray = get_object_vars( $source );
	}else{
		$resultArray = $source;
	}
	
	//	2)	Prep Instructions
	if( function_exists('gzinflate') ){
		$inflated = @gzinflate($instructions);
		if( $inflated !== false){
			$instructions = $inflated;
		}
	}
	$instructions = unserialize($instructions);

	// message(showArray($resultArray) );
	// message(showArray($instructions) );
	
	//	3)	Run Instruction For each Key
	foreach($instructions as $key => $instruction){
		$resultArray[$key] = run_Instructions($resultArray[$key],$instruction);
	}
	
	return $resultArray;
}

function run_Instructions($source,$instructions){
	
	if( is_string($instructions) ){
		return $instructions;
	}else{
		$source = stringToArray($source);
	}
	
	// message(showArray($source) );
	// message(showArray($instructions) );
	
	
	////////////////////////////////////////////////////////////////////////////////
	//
	//		I)	Prepare addRight and deleteLeft
	//
	//	1)	Delete/Add
	if( isset($instructions['d']) ){
		$deleteLeft = $instructions['d'];
	}
	if( isset($instructions['a']) ){
		$addRight = $instructions['a'];
	}
	
	
	//	2)	Replace => Delete/Add
	if( !empty($instructions['r']) ){
		foreach($instructions['r'] as $replaceKey => $with){
			$deleteLeft[$replaceKey] = '';
			foreach($with as $withKey => $withValue){
				$addRight[$replaceKey][$withKey] = $withValue;
			}
		}
	}
	
	//	3) Move => Delete/Add
	if( !empty($instructions['m']) ){
		$move = $instructions['m'];
		foreach($move as $from => $to){
			$deleteLeft[$from] = '';
			list($leftIndex,$rightIndex) = explode('.',$to);
			$addRight[$leftIndex][$rightIndex] = $source[$from];
		}
	}
		
	// 	echo '<table><tr>';
	// 	echo '<td style="vertical-align:top">Move<br />';
	// 	echo showArray($move);
	// 	echo '</td><td style="vertical-align:top">Delete<br />';
	// 	echo showArray($deleteLeft);
	// 	echo '</td><td style="vertical-align:top">Add<br />';
	// 	echo showArray($addRight);
	// 	echo '</td></table>';
	
	
	//message(showArray($addRight) );
	
	////////////////////////////////////////////////////////////////////////////////
	//
	//		II)	Apply add and delete
	//			i)			reverse array
	//			ii)			line by line
	//				iia)		delete
	//				iib)		add
	//			iii)		reverse array
	//
	
	krsort($source); 
	//message( showArray($source) );
	
	foreach($source as $sourceKey => $sourceValue){
		
		//$message = $sourceKey;
		if( !isset($deleteLeft[$sourceKey]) ){
			//$finalText[$sourceKey] = $source[$sourceKey];// wrong, just treat it as a stack,
										// otherwise it could result in writing over adds, 
			$finalText[] = $source[$sourceKey];
			//$message .= ' Leave: '.htmlspecialchars($source[$sourceKey]);
		}else{
			//$message .= ' Delete: '.htmlspecialchars($source[$sourceKey]);
		}
		//message($message);
		
		if( isset($addRight[$sourceKey]) ){
			krsort($addRight[$sourceKey]); // sort because of additions to addRight from move
											// krsort() because we're going backwards
			$add = array();
			foreach($addRight[$sourceKey] as $key => $addLine){
				$finalText[] = $addLine;
			}
		}
	}
	
	$finalText = array_reverse($finalText);
	
	// For additional added lines
	$nextIndex = count($source);
	if( isset($addRight[$nextIndex]) ){
		foreach($addRight[$nextIndex] as $key => $addLine){
			$finalText[] = $addLine;
		}
	}
	
	
	return implode("\n",$finalText);
}

//
//					HISTORY INSTRUCTIONS
//
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//					SINGLE REVISIONS
//
//		$rowLimit could be used to limit the the number of rows to 1
//			- this could be useful with the xmlHTTP saving where history elements will constantly be overwritten
//		$user
//			- limit the revisions to the user
//			- this was a bit of a hack?... and I'm not using it any more


function getRevision($revNum){
	global $dbObject,$wbTables;
	
	if( wbStrtolower($revNum) != 'current'){
		
		if( !is_numeric($revNum) ){
			message('INVALID_REVISION');
			return false;
		}

		$query = ' SELECT * FROM '.$wbTables['all_history'].' WHERE ';
		$query .= ' `file_id` = '.$dbObject->file_id;
		$query .= ' AND revision >= '.$revNum;
		if( wbStrtolower($dbObject->revision) != 'current'){
			$query .= ' AND revision < '.$dbObject->revision;
		}
		$query .= ' ORDER BY revision DESC';
		
		
		$result = wbDB::runQuery($query);
		$num = mysql_num_rows($result);
		if($num == 0){
			message('NO_UNIQUE_REVISION');
			return;
		}
		applyRevisionRows($result);
	}
	
}// end function

//nearly the same as above function other than this selects the lates revision using LIMIT 1
function getLastRevision(){
	global $dbObject,$wbTables;
	
	if(!$dbObject->exists){
		return false;
	}
		
	
	$query = ' SELECT * FROM '.$wbTables['all_history'].' WHERE ';
	$query .= ' `file_id` = '.$dbObject->file_id;
	$query .= ' ORDER BY revision DESC';
	$query .= ' LIMIT 1 ';
	
	$result = wbDB::runQuery($query);
	$num = mysql_num_rows($result);
	if( $num == 0 ){
		// 	Didn't get any rows
		//	... so just make sure it gets added by setting the modified value correctly
		//
		$_SESSION['editPage'][$dbObject->uniqStorage] = $dbObject->modified;
		return false;
	}
	
	applyRevisionRows($result);

	return true;
}
function applyRevisionRows(&$result){
	global $dbObject;
	
	while($row = mysql_fetch_object($result) ){
		
		unset($temp2);
		$temp2 = run_Instructions_main($dbObject,$row->instructions);
		$dbObject->setVariables($temp2,$dbObject->userValues);
		
		//must set these values because they aren't part of ->userValues
		$dbObject->revision = $row->revision;
		$dbObject->modified = $row->modified;
		$dbObject->summary = $row->summary;
		$dbObject->username = $row->username;
		$dbObject->ip = $row->ip;
		
		//
		$dbObject->distanceToCurrent++;
	}	
}
	
	






function showRevision($link=false){
	global $page,$dbObject,$lang;
	
	$revNum = $_GET['revNum'];
	getRevision($revNum);
	
	if( !$dbObject){
		return false;
	}
	
	$title = $lang['revision'].$dbObject->revision;
	$dbObject->links[$title] = '/Edit'.$dbObject->uniqLink.'?cmd=show&revNum='.$revNum;
	
	//!! this isn't quite right... how do we know that the message will be on the right tab..
	$message = $lang['revision_as_of'].dbFromDate($dbObject->modified,3);
	$message .= ' - ';
	if( $link ){
		$message .= $link;
	}else{
		$message .= wbLinks::local('/Edit'.$dbObject->uniqLink.'?cmd=editRevision&revNum='.$revNum,$lang['edit_revision']);
	}
	
	//previous|next links
	$showLinks = array();
	if( $dbObject->revision > 1){
		$prevNum = ($dbObject->revision-1);
		$showLinks[] = wbLinks::local('/Edit'.$dbObject->uniqLink.'?cmd=show&revNum='.$prevNum,wbLang::text('show_prev_revision',$prevNum));
	}
	
	if($dbObject->distanceToCurrent === 1){
		$showLinks[] = wbLinks::local($dbObject->uniqLink,'current_revision');
	}else{
		$nextNum = ($dbObject->revision+1);
		$showLinks[] = wbLinks::local('/Edit'.$dbObject->uniqLink.'?cmd=show&revNum='.$nextNum,wbLang::text('show_next_revision',$nextNum));
	}
	if(count($showLinks) > 0){
		$message .= '<br/><span class="sm">'.implode(' | ',$showLinks).'</span>';
	}
	
	message($message);
	
	//!!hack
	//	an older version might not be safe and history tables don't store that data
	//	so we just assume older versions aren't 'safe'
	if( strpos($dbObject->flags,'safe') !== false ){
		$dbObject->flags = str_replace('safe','',$dbObject->flags);
	}
	
	$field = $dbObject->outputObj($title);
	$dbObject->addFooter($field);
	
	
}//end function


//	Edit an older version, saving will make it the current version
//
//		for this to pass the check in toolSavePage.php it needs to have the current `modified` value
//		so I store `modified` in $mod then reassign it to $dbObject after getRevision();
//
function editRevision(){
	global $page,$dbObject,$lang;
	
	message('EDITING_REVISION');
	
	$mod = $dbObject->modified;
	getRevision($_GET['revNum']);
	if( !$dbObject){
		return false;
	}
	$dbObject->modified = $mod;

	
	$_POST['summary'] = $lang['reverted_to_rev'].$_GET['revNum'];
	
	//$dbObject->links['Edit Revision'] = $dbObject->uniqLink.'?cmd=editRevision&revNum='.$_GET['revNum'];
	includeFile('tool/EditPage.php');