73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
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/*! @file
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@id $Id$
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*/
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// 1 2 3 4 5 6 7 8
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// 45678901234567890123456789012345678901234567890123456789012345678901234567890
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#include <QtCore/QFile>
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#include <QtCore/QFileInfo>
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#include <QtCore/QFileSystemWatcher>
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#include <QtCore/QString>
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#include <QtCore/QStringList>
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#include <cassert>
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class Storage: public QObject {
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Q_OBJECT;
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Q_SIGNALS:
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void changed();
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public:
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Storage() {}
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bool valid() {
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return readable() || writeable();
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}
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operator bool() {
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return valid();
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}
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virtual bool readable() = 0;
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virtual bool writeable() = 0;
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virtual QStringList read() = 0;
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virtual bool write(const QStringList& out) = 0;
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};
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class FileStorage: public Storage {
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Q_OBJECT;
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public:
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FileStorage(QString file): _file(file) {
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if (valid()) {
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assert(connect(new QFileSystemWatcher(QStringList()<<_file.fileName(),
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this),
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SIGNAL(fileChanged(const QString&)),
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SLOT(changed())));
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}
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}
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bool readable() {
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return QFileInfo(_file).exists();
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}
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bool writeable() {
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return readable() || !_file.fileName().isEmpty();
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}
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QStringList read() {
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QStringList res;
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if (readable()) {
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if (_file.open(QIODevice::ReadOnly))
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res=QString::fromUtf8(_file.readAll()).split("\n");
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_file.close();
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}
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return res;
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}
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bool write(const QStringList& out) {
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bool res(false);
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if (writeable()) {
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if (_file.open(QIODevice::WriteOnly))
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if (_file.write(out.join("\n").toUtf8())>=0) res=true;
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_file.close();
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}
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return res;
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}
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private:
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QFile _file;
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};
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