Add free disk space to WebUI status bar

Closes #6829.

src/webui/CMakeLists.txt

@@ -5,6 +5,7 @@ api/apierror.h
 api/appcontroller.h
 api/isessionmanager.h
 api/authcontroller.h
+api/freediskspacechecker.h
 api/logcontroller.h
 api/rsscontroller.h
 api/synccontroller.h
@@ -19,6 +20,7 @@ api/apicontroller.cpp
 api/apierror.cpp
 api/appcontroller.cpp
 api/authcontroller.cpp
+api/freediskspacechecker.cpp
 api/logcontroller.cpp
 api/rsscontroller.cpp
 api/synccontroller.cpp

src/webui/api/freediskspacechecker.cpp

@@ -0,0 +1,38 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "freediskspacechecker.h"
+
+#include "base/bittorrent/session.h"
+#include "base/utils/fs.h"
+
+void FreeDiskSpaceChecker::check()
+{
+    const qint64 freeDiskSpace = Utils::Fs::freeDiskSpaceOnPath(BitTorrent::Session::instance()->defaultSavePath());
+    emit checked(freeDiskSpace);
+}

src/webui/api/freediskspacechecker.h

@@ -0,0 +1,46 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <QObject>
+
+class FreeDiskSpaceChecker : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(FreeDiskSpaceChecker)
+
+public:
+    FreeDiskSpaceChecker() = default;
+
+public slots:
+    void check();
+
+signals:
+    void checked(qint64 freeSpaceSize);
+};

src/webui/api/synccontroller.cpp

@@ -29,6 +29,8 @@
 #include "synccontroller.h"
 
 #include <QJsonObject>
+#include <QThread>
+#include <QTimer>
 
 #include "base/bittorrent/peerinfo.h"
 #include "base/bittorrent/session.h"
@@ -38,6 +40,7 @@
 #include "base/utils/fs.h"
 #include "base/utils/string.h"
 #include "apierror.h"
+#include "freediskspacechecker.h"
 #include "isessionmanager.h"
 #include "serialize/serialize_torrent.h"
 
@@ -75,6 +78,7 @@ const char KEY_TRANSFER_UPDATA[] = "up_info_data";
 const char KEY_TRANSFER_UPRATELIMIT[] = "up_rate_limit";
 const char KEY_TRANSFER_DHT_NODES[] = "dht_nodes";
 const char KEY_TRANSFER_CONNECTION_STATUS[] = "connection_status";
+const char KEY_TRANSFER_FREESPACEONDISK[] = "free_space_on_disk";
 
 // Statistics keys
 const char KEY_TRANSFER_ALLTIME_DL[] = "alltime_dl";
@@ -94,6 +98,8 @@ const char KEY_FULL_UPDATE[] = "full_update";
 const char KEY_RESPONSE_ID[] = "rid";
 const char KEY_SUFFIX_REMOVED[] = "_removed";
 
+const int FREEDISKSPACE_CHECK_TIMEOUT = 30000;
+
 namespace
 {
     void processMap(const QVariantMap &prevData, const QVariantMap &data, QVariantMap &syncData);
@@ -312,6 +318,25 @@ namespace
     }
 }
 
+SyncController::SyncController(ISessionManager *sessionManager, QObject *parent)
+    : APIController(sessionManager, parent)
+{
+    m_freeDiskSpaceThread = new QThread(this);
+    m_freeDiskSpaceChecker = new FreeDiskSpaceChecker();
+    m_freeDiskSpaceChecker->moveToThread(m_freeDiskSpaceThread);
+
+    connect(m_freeDiskSpaceThread, &QThread::finished, m_freeDiskSpaceChecker, &QObject::deleteLater);
+    connect(m_freeDiskSpaceChecker, &FreeDiskSpaceChecker::checked, this, &SyncController::freeDiskSpaceSizeUpdated);
+
+    m_freeDiskSpaceThread->start();
+}
+
+SyncController::~SyncController()
+{
+    m_freeDiskSpaceThread->quit();
+    m_freeDiskSpaceThread->wait();
+}
+
 // The function returns the changed data from the server to synchronize with the web client.
 // Return value is map in JSON format.
 // Map contain the key:
@@ -369,6 +394,7 @@ namespace
 //  - "up_rate_limit: upload speed limit
 //  - "queueing": priority system usage flag
 //  - "refresh_interval": torrents table refresh interval
+//  - "free_space_on_disk": Free space on the default save path
 // GET param:
 //   - rid (int): last response id
 void SyncController::maindataAction()
@@ -412,6 +438,7 @@ void SyncController::maindataAction()
     data["categories"] = categories;
 
     QVariantMap serverState = getTranserInfo();
+    serverState[KEY_TRANSFER_FREESPACEONDISK] = getFreeDiskSpace();
     serverState[KEY_SYNC_MAINDATA_QUEUEING] = session->isQueueingSystemEnabled();
     serverState[KEY_SYNC_MAINDATA_USE_ALT_SPEED_LIMITS] = session->isAltGlobalSpeedLimitEnabled();
     serverState[KEY_SYNC_MAINDATA_REFRESH_INTERVAL] = session->refreshInterval();
@@ -482,3 +509,18 @@ void SyncController::torrentPeersAction()
     sessionManager()->session()->setData(QLatin1String("syncTorrentPeersLastResponse"), lastResponse);
     sessionManager()->session()->setData(QLatin1String("syncTorrentPeersLastAcceptedResponse"), lastAcceptedResponse);
 }
+
+qint64 SyncController::getFreeDiskSpace()
+{
+    const qint64 now = QDateTime::currentMSecsSinceEpoch();
+    if ((now - m_freeDiskSpaceLastUpdate) >= FREEDISKSPACE_CHECK_TIMEOUT) {
+        QTimer::singleShot(0, m_freeDiskSpaceChecker, &FreeDiskSpaceChecker::check);
+        m_freeDiskSpaceLastUpdate = now;
+    }
+    return m_freeDiskSpace;
+}
+
+void SyncController::freeDiskSpaceSizeUpdated(qint64 freeSpaceSize)
+{
+    m_freeDiskSpace = freeSpaceSize;
+}

src/webui/api/synccontroller.h

@@ -30,6 +30,12 @@
 
 #include "apicontroller.h"
 
+struct ISessionManager;
+
+class QThread;
+
+class FreeDiskSpaceChecker;
+
 class SyncController : public APIController
 {
     Q_OBJECT
@@ -38,7 +44,19 @@ class SyncController : public APIController
 public:
     using APIController::APIController;
 
+    explicit SyncController(ISessionManager *sessionManager, QObject *parent = nullptr);
+    ~SyncController() override;
+
 private slots:
     void maindataAction();
     void torrentPeersAction();
+    void freeDiskSpaceSizeUpdated(qint64 freeSpaceSize);
+
+private:
+    qint64 getFreeDiskSpace();
+
+    qint64 m_freeDiskSpace = 0;
+    qint64 m_freeDiskSpaceLastUpdate = 0;
+    FreeDiskSpaceChecker *m_freeDiskSpaceChecker = nullptr;
+    QThread *m_freeDiskSpaceThread = nullptr;
 };

src/webui/webui.pri

@@ -3,6 +3,7 @@ HEADERS += \
     $$PWD/api/apierror.h \
     $$PWD/api/appcontroller.h \
     $$PWD/api/authcontroller.h \
+    $$PWD/api/freediskspacechecker.h \
     $$PWD/api/isessionmanager.h \
     $$PWD/api/logcontroller.h \
     $$PWD/api/rsscontroller.h \
@@ -18,6 +19,7 @@ SOURCES += \
     $$PWD/api/apierror.cpp \
     $$PWD/api/appcontroller.cpp \
     $$PWD/api/authcontroller.cpp \
+    $$PWD/api/freediskspacechecker.cpp \
     $$PWD/api/logcontroller.cpp \
     $$PWD/api/rsscontroller.cpp \
     $$PWD/api/synccontroller.cpp \

src/webui/www/private/index.html

@@ -155,6 +155,8 @@
             <span id="error_div"></span>
             <table style="position: absolute; right: 5px;">
                 <tr>
+                    <td id="freeSpaceOnDisk"></td>
+                    <td class="statusBarSeparator"></td>
                     <td id="DHTNodes"></td>
                     <td class="statusBarSeparator"></td>
                     <td><img id="connectionStatus" alt="Connection Status" src="images/skin/firewalled.svg" style="height: 1.5em;" /></td>

src/webui/www/private/scripts/client.js

@@ -421,6 +421,7 @@ window.addEvent('load', function() {
         }
         else
             document.title = "qBittorrent ${VERSION} QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]";
+        $('freeSpaceOnDisk').set('html', 'QBT_TR(Free space: %1)QBT_TR[CONTEXT=HttpServer]'.replace("%1", friendlyUnit(serverState.free_space_on_disk)));
         $('DHTNodes').set('html', 'QBT_TR(DHT: %1 nodes)QBT_TR[CONTEXT=StatusBar]'.replace("%1", serverState.dht_nodes));
 
         // Statistics dialog