verdigado-public/nextcloud_groupfolder_filesystem_snapshots
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implemented snapshot diff; started work on admin settings

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Jonathan Treffler 2023-08-08 11:52:21 +02:00 • committed by root
parent 4c67bf71c4
commit 8b22d56e32
7 changed files with 423 additions and 8 deletions
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lib/Manager/DiffManager.php Normal file
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<?php
namespace OCA\GroupfolderFilesystemSnapshots\Manager;
class DiffManager {
public function __construct(){
}
private function seperateFilesFromFolders($parentDir, $items) {
$files = [];
$folders = [];
foreach($items as $item) {
if(is_dir($parentDir . DIRECTORY_SEPARATOR . $item)) {
$folders[] = $item;
} else {
$files[] = $item;
}
}
return array($files, $folders);
}
private function getFilesAndFolders($dir) {
$scan = array_diff(scandir($dir), array('..', '.'));
return $this->seperateFilesFromFolders($dir, $scan);
}
private function getFilesizesOfFiles($prefix, array $files) {
$result = array();
foreach($files as $index=>$file) {
$result[$index] = filesize($prefix . DIRECTORY_SEPARATOR . $file);
}
return $result;
}
function diffDirectories($dir1, $dir2, $prefix = "") {
$diff = [];
$scan1files = [];
$scan1folders = [];
if(file_exists($dir1) && is_dir($dir1)) {
list($scan1files, $scan1folders) = $this->getFilesAndFolders($dir1);
}
$scan2files = [];
$scan2folders = [];
if(file_exists($dir2) && is_dir($dir2)) {
list($scan2files, $scan2folders) = $this->getFilesAndFolders($dir2);
}
$fileCreations = array_diff($scan2files, $scan1files);
$fileCreationsFilesizes = $this->getFilesizesOfFiles($dir2, $fileCreations);
$fileDeletions = array_diff($scan1files, $scan2files);
$fileDeletionsFilesizes = $this->getFilesizesOfFiles($dir1, $fileDeletions);
$filePossibleEdits = array_intersect($scan1files, $scan2files);
$allSubfolders = array_unique(array_merge($scan1folders, $scan2folders));
/*$diff[] = [
"type" => "DEBUG",
"prefix" => $prefix,
"fileCreations" => $fileCreations,
"fileCreationsFilesizes" => $fileCreationsFilesizes,
"fileDeletions" => $fileDeletions,
"fileDeletionsFilesizes" => $fileDeletionsFilesizes,
//"folderCreations" => $folderCreations,
//"folderDeletions" => $folderDeletions,
"allSubfolders" => $allSubfolders,
];*/
// search for creations and deletions, that are actually renames
foreach($fileCreations as $creationIndex=>$creation) {
$creationPath = $dir2 . DIRECTORY_SEPARATOR . $creation;
$creationSize = $fileCreationsFilesizes[$creationIndex];
$renameContenders = array_keys($fileDeletionsFilesizes, $creationSize);
if(sizeof($renameContenders) != 0) {
/*$diff[] = [
"type" => "DEBUG",
"comparing" => [
"creation" => $creationIndex,
"deletions" => $renameContenders,
],
];*/
$creationSHA = sha1_file($creationPath);
foreach($renameContenders as $contender) {
$deletion = $fileDeletions[$contender];
$deletionPath = $dir1 . DIRECTORY_SEPARATOR . $deletion;
$deletionSHA = sha1_file($deletionPath);
if($deletionSHA == $creationSHA) {
$diff[] = [
"type" => "RENAME",
"before" => [
"exists" => True,
"path" => $prefix . DIRECTORY_SEPARATOR . $deletion,
"size" => $creationSize,
],
"afterwards" => [
"exists" => True,
"path" => $prefix . DIRECTORY_SEPARATOR . $creation,
"size" => $creationSize,
]
];
unset($fileCreations[$creationIndex]);
unset($fileDeletions[$contender]);
break;
}
}
}
}
foreach($fileCreations as $index=>$creation) {
$diff[] = [
"type" => "CREATION",
"before" => [
"exists" => False,
],
"afterwards" => [
"exists" => True,
"path" => $prefix . DIRECTORY_SEPARATOR . $creation,
"size" => $fileCreationsFilesizes[$index],
]
];
}
foreach($fileDeletions as $index=>$deletion) {
$diff[] = [
"type" => "DELETION",
"before" => [
"exists" => True,
"path" => $prefix . DIRECTORY_SEPARATOR . $deletion,
"size" => $fileDeletionsFilesizes[$index],
],
"afterwards" => [
"exists" => False,
],
];
}
foreach($filePossibleEdits as $possibleEdit) {
$file1 = $dir1 . DIRECTORY_SEPARATOR . $possibleEdit;
$file2 = $dir2 . DIRECTORY_SEPARATOR . $possibleEdit;
$file1Size = filesize($file1);
$file2Size = filesize($file2);
if(filemtime($file1) == filemtime($file2)) {
//not different because same mtime
continue;
} else {
// mtime different, but could just have gotten touched without modifications
if($file1Size == $file2Size) {
// if filesize is the same check for binary differences
$handle1 = fopen($file1, 'rb');
$handle2 = fopen($file2, 'rb');
$filesdifferent = false;
while(!feof($handle1)) {
if(fread($handle1, 8192) != fread($handle2, 8192)) {
// files are different
$filesdifferent = true;
break;
}
}
fclose($handle1);
fclose($handle2);
if(!$filesdifferent) {
continue;
}
}
}
$diff[] = [
"type" => "EDIT",
"before" => [
"path" => $prefix . DIRECTORY_SEPARATOR . $possibleEdit,
"size" => $file1Size,
],
"afterwards" => [
"path" => $prefix . DIRECTORY_SEPARATOR . $possibleEdit,
"size" => $file2Size,
]
];
}
foreach($allSubfolders as $folder) {
array_push($diff, ...($this->diffDirectories($dir1 . DIRECTORY_SEPARATOR . $folder, $dir2 . DIRECTORY_SEPARATOR . $folder, $prefix . DIRECTORY_SEPARATOR . $folder)));
}
return $diff;
}
}