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//===========================================
// Lumina-DE source code
// Copyright (c) 2016, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#include "TarBackend.h"
#include <QFile>
#include <QDir>
#include <QDebug>
Backend::Backend(QObject *parent) : QObject(parent){
//Setup the backend process
PROC.setProcessChannelMode(QProcess::MergedChannels);
PROC.setProgram("tar");
connect(&PROC, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(procFinished(int, QProcess::ExitStatus)) );
connect(&PROC, SIGNAL(readyReadStandardOutput()), this, SLOT(processData()) );
connect(&PROC, SIGNAL(started()), this, SIGNAL(ProcessStarting()) );
LIST = STARTING = false;
}
Backend::~Backend(){
}
//===============
// PUBLIC
//===============
void Backend::loadFile(QString path){
filepath = path;
tmpfilepath = filepath.section("/",0,-2)+"/"+".tmp_larchiver_"+filepath.section("/",-1);
flags.clear();
flags << "-f" << filepath; //add the actual archive path
if(QFile::exists(path)){ startList(); }
else{ contents.clear(); emit ProcessFinished(); }
}
bool Backend::canModify(){
static QStringList validEXT;
if( validEXT.isEmpty() ){
validEXT << ".zip" << ".tar.gz" << ".tgz" << ".tar.xz" << ".txz" << ".tar.bz" << ".tbz" << ".tar.bz2" << ".tbz2" << ".tar" \
<< ".tar.lzma" << ".tlz" << ".cpio" << ".pax" << ".ar" << ".shar" << ".7z";
}
for(int i=0; i<validEXT.length(); i++){
if(filepath.endsWith(validEXT[i])){ return true; }
}
return false;
}
QString Backend::currentFile(){
return filepath;
}
bool Backend::isWorking(){
return (PROC.state() != QProcess::Running);
}
//Listing routines
QStringList Backend::heirarchy(){
return contents.keys();
}
double Backend::size(QString file){
if(!contents.contains(file)){ return -1; }
return contents.value(file)[1].toDouble();
}
double Backend::csize(QString file){
if(!contents.contains(file)){ return -1; }
return contents.value(file)[1].toDouble();
}
bool Backend::isDir(QString file){
if(!contents.contains(file)){ return false; }
return contents.value(file)[0].startsWith("d");
}
//Modification routines
void Backend::startAdd(QStringList paths){
//NOTE: All the "paths" have to have the same parent directory
if(paths.contains(filepath)){ paths.removeAll(filepath); }
if(paths.isEmpty()){ return; }
QStringList args;
args << "-c" << "-a";
args << flags;
//Now setup the parent dir
QString parent = paths[0].section("/",0,-2);
for(int i=0; i<paths.length(); i++){
paths[i] = paths[i].section(parent,1,-1);
if(paths[i].startsWith("/")){ paths[i].remove(0,1); }
}
args << "-C" << parent;
args << paths;
if(QFile::exists(filepath)){ //append to existing
args.replaceInStrings(filepath, tmpfilepath);
args<< "@"+filepath;
}
STARTING=true;
PROC.start("tar", args);
}
void Backend::startRemove(QStringList paths){
if(paths.contains(filepath)){ paths.removeAll(filepath); }
if(contents.isEmpty() || paths.isEmpty() || !QFile::exists(filepath)){ return; } //invalid
QStringList args;
args << "-c" << "-a";
args << flags;
args.replaceInStrings(filepath, tmpfilepath);
//Add the include rules for all the files we want to keep (no exclude option in "tar")
for(int i=0; i<paths.length(); i++){
args << "--exclude" << paths[i];
}
args<< "@"+filepath;
STARTING=true;
PROC.start("tar", args);
}
void Backend::startExtract(QString path, bool overwrite){
QStringList args;
args << "-x";
if(!overwrite){ args << "-k"; }
args << flags << "-C" << path;
STARTING=true;
//qDebug() << "Starting command:" << "tar" << args;
PROC.start("tar", args);
}
void Backend::startViewFile(QString path){
QStringList args;
args << "-x";
args << flags <<"--include" << path <<"--strip-components" << QString::number(path.count("/")) << "-C" << QDir::tempPath();
STARTING=true;
qDebug() << "Starting command:" << "tar" << args;
PROC.start("tar", args);
}
//===============
// PUBLIC SLOTS
//===============
//===============
// PRIVATE
//===============
void Backend::parseLines(QStringList lines){
for(int i=0; i<lines.length(); i++){
QStringList info = lines[i].split(" ",QString::SkipEmptyParts);
//Format: [perms, ?, user, group, size, month, day, time, file]
if(info.startsWith("x ") && filepath.endsWith(".zip")){
//ZIP archives do not have all the extra information - just filenames
while(info.length()>2){ info[1]=info[1]+" "+info[2]; }
QString file = info[1];
QString perms = "";
if(file.endsWith("/")){ perms = "d"; file.chop(1); }
contents.insert(file, QStringList() << perms << "-1" ); //Save the [perms, size ]
}
else if(info.length()<9){ continue; } //invalid line
//TAR Archive parsing
while(info.length()>9){ info[8] = info[8]+" "+info[9]; info.removeAt(9); } //Filename has spaces in it
QString file = info[8];
if(file.endsWith("/")){ file.chop(1); }
contents.insert(file, QStringList() << info[0] << info[4] ); //Save the [perms, size ]
}
}
void Backend::startList(){
contents.clear();
QStringList args;
args << "-tv";
LIST = STARTING=true;
PROC.start("tar", QStringList() << args << flags);
}
//===============
// PRIVATE SLOTS
//===============
void Backend::procFinished(int retcode, QProcess::ExitStatus){
processData();
qDebug() << "Process Finished:" << PROC.arguments() << retcode;
LIST = STARTING = false;
if(PROC.arguments().contains("-tv")){
if(retcode!=0){ contents.clear(); } //could not read archive
emit ProcessFinished();
}else{
bool needupdate = true;
QStringList args = PROC.arguments();
if(args.contains("-x") && retcode==0){
needupdate=false;
if(args.contains("--include")){
//Need to find the full path to the extracted file
QString path = args.last() +"/"+ args[ args.indexOf("--include")+1].section("/",-1);
QFile::setPermissions(path, QFileDevice::ReadOwner);
QProcess::startDetached("xdg-open \""+path+"\"");
}else{
QProcess::startDetached("xdg-open \""+ args.last()+"\""); //just extracted to a dir - open it now
}
}else if(args.contains("-c") && QFile::exists(tmpfilepath)){
if(retcode==0){
QFile::remove(filepath);
QFile::rename(tmpfilepath, filepath);
}else{
QFile::remove(tmpfilepath);
}
}
if(needupdate){ startList(); }
else{ emit ProcessFinished(); }
}
}
void Backend::processData(){
//Read the process
static QString data;
QString read = data+PROC.readAllStandardOutput();
if(read.endsWith("\n")){ data.clear(); }
else{ data = read.section("\n",-1); read = read.section("\n",0,-2); }
QStringList lines = read.split("\n",QString::SkipEmptyParts);
if(LIST){ parseLines(lines); }
//qDebug() << lines;
emit ProgressUpdate(-1, "");
}
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