pollymc/api/logic/FileSystem.cpp
2018-07-15 14:51:05 +02:00

453 lines
12 KiB
C++

// Licensed under the Apache-2.0 license. See README.md for details.
#include "FileSystem.h"
#include <QDir>
#include <QFile>
#include <QSaveFile>
#include <QFileInfo>
#include <QDebug>
#include <QUrl>
#include <QStandardPaths>
#include <QTextStream>
#if defined Q_OS_WIN32
#include <windows.h>
#include <string>
#include <sys/utime.h>
#include <winnls.h>
#include <shobjidl.h>
#include <objbase.h>
#include <objidl.h>
#include <shlguid.h>
#include <shlobj.h>
#else
#include <utime.h>
#endif
namespace FS {
void ensureExists(const QDir &dir)
{
if (!QDir().mkpath(dir.absolutePath()))
{
throw FileSystemException("Unable to create folder " + dir.dirName() + " (" +
dir.absolutePath() + ")");
}
}
void write(const QString &filename, const QByteArray &data)
{
ensureExists(QFileInfo(filename).dir());
QSaveFile file(filename);
if (!file.open(QSaveFile::WriteOnly))
{
throw FileSystemException("Couldn't open " + filename + " for writing: " +
file.errorString());
}
if (data.size() != file.write(data))
{
throw FileSystemException("Error writing data to " + filename + ": " +
file.errorString());
}
if (!file.commit())
{
throw FileSystemException("Error while committing data to " + filename + ": " +
file.errorString());
}
}
QByteArray read(const QString &filename)
{
QFile file(filename);
if (!file.open(QFile::ReadOnly))
{
throw FileSystemException("Unable to open " + filename + " for reading: " +
file.errorString());
}
const qint64 size = file.size();
QByteArray data(int(size), 0);
const qint64 ret = file.read(data.data(), size);
if (ret == -1 || ret != size)
{
throw FileSystemException("Error reading data from " + filename + ": " +
file.errorString());
}
return data;
}
bool updateTimestamp(const QString& filename)
{
#ifdef Q_OS_WIN32
std::wstring filename_utf_16 = filename.toStdWString();
return (_wutime64(filename_utf_16.c_str(), nullptr) == 0);
#else
QByteArray filenameBA = QFile::encodeName(filename);
return (utime(filenameBA.data(), nullptr) == 0);
#endif
}
bool ensureFilePathExists(QString filenamepath)
{
QFileInfo a(filenamepath);
QDir dir;
QString ensuredPath = a.path();
bool success = dir.mkpath(ensuredPath);
return success;
}
bool ensureFolderPathExists(QString foldernamepath)
{
QFileInfo a(foldernamepath);
QDir dir;
QString ensuredPath = a.filePath();
bool success = dir.mkpath(ensuredPath);
return success;
}
bool copy::operator()(const QString &offset)
{
//NOTE always deep copy on windows. the alternatives are too messy.
#if defined Q_OS_WIN32
m_followSymlinks = true;
#endif
auto src = PathCombine(m_src.absolutePath(), offset);
auto dst = PathCombine(m_dst.absolutePath(), offset);
QFileInfo currentSrc(src);
if (!currentSrc.exists())
return false;
if(!m_followSymlinks && currentSrc.isSymLink())
{
qDebug() << "creating symlink" << src << " - " << dst;
if (!ensureFilePathExists(dst))
{
qWarning() << "Cannot create path!";
return false;
}
return QFile::link(currentSrc.symLinkTarget(), dst);
}
else if(currentSrc.isFile())
{
qDebug() << "copying file" << src << " - " << dst;
if (!ensureFilePathExists(dst))
{
qWarning() << "Cannot create path!";
return false;
}
return QFile::copy(src, dst);
}
else if(currentSrc.isDir())
{
qDebug() << "recursing" << offset;
if (!ensureFolderPathExists(dst))
{
qWarning() << "Cannot create path!";
return false;
}
QDir currentDir(src);
for(auto & f : currentDir.entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot | QDir::Hidden | QDir::System))
{
auto inner_offset = PathCombine(offset, f);
// ignore and skip stuff that matches the blacklist.
if(m_blacklist && m_blacklist->matches(inner_offset))
{
continue;
}
if(!operator()(inner_offset))
{
qWarning() << "Failed to copy" << inner_offset;
return false;
}
}
}
else
{
qCritical() << "Copy ERROR: Unknown filesystem object:" << src;
return false;
}
return true;
}
bool deletePath(QString path)
{
bool OK = true;
QDir dir(path);
if (!dir.exists())
{
return OK;
}
auto allEntries = dir.entryInfoList(QDir::NoDotAndDotDot | QDir::System | QDir::Hidden |
QDir::AllDirs | QDir::Files,
QDir::DirsFirst);
for(auto & info: allEntries)
{
#if defined Q_OS_WIN32
QString nativePath = QDir::toNativeSeparators(info.absoluteFilePath());
auto wString = nativePath.toStdWString();
DWORD dwAttrs = GetFileAttributesW(wString.c_str());
// Windows: check for junctions, reparse points and other nasty things of that sort
if(dwAttrs & FILE_ATTRIBUTE_REPARSE_POINT)
{
if (info.isFile())
{
OK &= QFile::remove(info.absoluteFilePath());
}
else if (info.isDir())
{
OK &= dir.rmdir(info.absoluteFilePath());
}
}
#else
// We do not trust Qt with reparse points, but do trust it with unix symlinks.
if(info.isSymLink())
{
OK &= QFile::remove(info.absoluteFilePath());
}
#endif
else if (info.isDir())
{
OK &= deletePath(info.absoluteFilePath());
}
else if (info.isFile())
{
OK &= QFile::remove(info.absoluteFilePath());
}
else
{
OK = false;
qCritical() << "Delete ERROR: Unknown filesystem object:" << info.absoluteFilePath();
}
}
OK &= dir.rmdir(dir.absolutePath());
return OK;
}
QString PathCombine(const QString & path1, const QString & path2)
{
if(!path1.size())
return path2;
if(!path2.size())
return path1;
return QDir::cleanPath(path1 + QDir::separator() + path2);
}
QString PathCombine(const QString & path1, const QString & path2, const QString & path3)
{
return PathCombine(PathCombine(path1, path2), path3);
}
QString PathCombine(const QString & path1, const QString & path2, const QString & path3, const QString & path4)
{
return PathCombine(PathCombine(path1, path2, path3), path4);
}
QString AbsolutePath(QString path)
{
return QFileInfo(path).absolutePath();
}
QString ResolveExecutable(QString path)
{
if (path.isEmpty())
{
return QString();
}
if(!path.contains('/'))
{
path = QStandardPaths::findExecutable(path);
}
QFileInfo pathInfo(path);
if(!pathInfo.exists() || !pathInfo.isExecutable())
{
return QString();
}
return pathInfo.absoluteFilePath();
}
/**
* Normalize path
*
* Any paths inside the current folder will be normalized to relative paths (to current)
* Other paths will be made absolute
*/
QString NormalizePath(QString path)
{
QDir a = QDir::currentPath();
QString currentAbsolute = a.absolutePath();
QDir b(path);
QString newAbsolute = b.absolutePath();
if (newAbsolute.startsWith(currentAbsolute))
{
return a.relativeFilePath(newAbsolute);
}
else
{
return newAbsolute;
}
}
QString badFilenameChars = "\"\\/?<>:*|!";
QString RemoveInvalidFilenameChars(QString string, QChar replaceWith)
{
for (int i = 0; i < string.length(); i++)
{
if (badFilenameChars.contains(string[i]))
{
string[i] = replaceWith;
}
}
return string;
}
QString DirNameFromString(QString string, QString inDir)
{
int num = 0;
QString baseName = RemoveInvalidFilenameChars(string, '-');
QString dirName;
do
{
if(num == 0)
{
dirName = baseName;
}
else
{
dirName = baseName + QString::number(num);;
}
// If it's over 9000
if (num > 9000)
return "";
num++;
} while (QFileInfo(PathCombine(inDir, dirName)).exists());
return dirName;
}
// Does the folder path contain any '!'? If yes, return true, otherwise false.
// (This is a problem for Java)
bool checkProblemticPathJava(QDir folder)
{
QString pathfoldername = folder.absolutePath();
return pathfoldername.contains("!", Qt::CaseInsensitive);
}
// Win32 crap
#if defined Q_OS_WIN
bool called_coinit = false;
HRESULT CreateLink(LPCSTR linkPath, LPCSTR targetPath, LPCSTR args)
{
HRESULT hres;
if (!called_coinit)
{
hres = CoInitialize(NULL);
called_coinit = true;
if (!SUCCEEDED(hres))
{
qWarning("Failed to initialize COM. Error 0x%08lX", hres);
return hres;
}
}
IShellLink *link;
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink,
(LPVOID *)&link);
if (SUCCEEDED(hres))
{
IPersistFile *persistFile;
link->SetPath(targetPath);
link->SetArguments(args);
hres = link->QueryInterface(IID_IPersistFile, (LPVOID *)&persistFile);
if (SUCCEEDED(hres))
{
WCHAR wstr[MAX_PATH];
MultiByteToWideChar(CP_ACP, 0, linkPath, -1, wstr, MAX_PATH);
hres = persistFile->Save(wstr, TRUE);
persistFile->Release();
}
link->Release();
}
return hres;
}
#endif
QString getDesktopDir()
{
return QStandardPaths::writableLocation(QStandardPaths::DesktopLocation);
}
// Cross-platform Shortcut creation
bool createShortCut(QString location, QString dest, QStringList args, QString name,
QString icon)
{
#if defined Q_OS_LINUX
location = PathCombine(location, name + ".desktop");
QFile f(location);
f.open(QIODevice::WriteOnly | QIODevice::Text);
QTextStream stream(&f);
QString argstring;
if (!args.empty())
argstring = " '" + args.join("' '") + "'";
stream << "[Desktop Entry]"
<< "\n";
stream << "Type=Application"
<< "\n";
stream << "TryExec=" << dest.toLocal8Bit() << "\n";
stream << "Exec=" << dest.toLocal8Bit() << argstring.toLocal8Bit() << "\n";
stream << "Name=" << name.toLocal8Bit() << "\n";
stream << "Icon=" << icon.toLocal8Bit() << "\n";
stream.flush();
f.close();
f.setPermissions(f.permissions() | QFileDevice::ExeOwner | QFileDevice::ExeGroup |
QFileDevice::ExeOther);
return true;
#elif defined Q_OS_WIN
// TODO: Fix
// QFile file(PathCombine(location, name + ".lnk"));
// WCHAR *file_w;
// WCHAR *dest_w;
// WCHAR *args_w;
// file.fileName().toWCharArray(file_w);
// dest.toWCharArray(dest_w);
// QString argStr;
// for (int i = 0; i < args.count(); i++)
// {
// argStr.append(args[i]);
// argStr.append(" ");
// }
// argStr.toWCharArray(args_w);
// return SUCCEEDED(CreateLink(file_w, dest_w, args_w));
return false;
#else
qWarning("Desktop Shortcuts not supported on your platform!");
return false;
#endif
}
}