FEATURE: uTorrent compatible tracker list support (use torrentz.com url as a default)

Changelog

@@ -5,6 +5,7 @@
     - FEATURE: Peer Exchange (PeX) can be disabled from preferences
     - FEATURE: Append !.qB extension to incomplete files option (libtorrent >= v0.15 only)
     - FEATURE: Torrent files/folders can be renamed
+    - FEATURE: uTorrent compatible tracker list support (use torrentz.com url as a default)
     - COSMETIC: Use checkboxes to filter torrent content instead of comboboxes
     - COSMETIC: Use alternating row colors in transfer list (set in program preferences)
     - COSMETIC: Added a spin box to speed limiting dialog for manual input

src/trackerlist.h

@@ -221,10 +221,10 @@ public slots:
 
   // Ask the user for new trackers and add them to the torrent
   void askForTrackers(){
-    QStringList trackers = TrackersAdditionDlg::askForTrackers();
-    if(!trackers.empty()) {
     QTorrentHandle h = properties->getCurrentTorrent();
     if(!h.is_valid()) return;
+    QStringList trackers = TrackersAdditionDlg::askForTrackers(h);
+    if(!trackers.empty()) {
       foreach(const QString& tracker, trackers) {
         announce_entry url(tracker.toStdString());
         url.tier = 0;

src/trackersadditiondlg.h

@@ -33,14 +33,26 @@
 
 #include <QDialog>
 #include <QStringList>
+#include <QMessageBox>
+#include <QFile>
+#include <QUrl>
+#include "misc.h"
 #include "ui_trackersadditiondlg.h"
+#include "downloadthread.h"
+#include "qtorrenthandle.h"
 
 class TrackersAdditionDlg : public QDialog, private Ui::TrackersAdditionDlg{
   Q_OBJECT
 
+private:
+  QTorrentHandle h;
+
 public:
-    TrackersAdditionDlg(QWidget *parent=0): QDialog(parent){
+  TrackersAdditionDlg(QTorrentHandle h, QWidget *parent=0): QDialog(parent), h(h) {
     setupUi(this);
+    // As a default, use torrentz.com link
+    list_url->setText("http://www.torrentz.com/announce_"+h.hash());
+    list_url->setCursorPosition(0);
   }
 
   ~TrackersAdditionDlg(){}
@@ -49,9 +61,72 @@ class TrackersAdditionDlg : public QDialog, private Ui::TrackersAdditionDlg{
     return trackers_list->toPlainText().trimmed().split("\n");
   }
 
-    static QStringList askForTrackers() {
+public slots:
+  void on_uTorrentListButton_clicked() {
+    downloadThread *d = new downloadThread(this);
+    connect(d, SIGNAL(downloadFinished(QString,QString)), this, SLOT(parseUTorrentList(QString,QString)));
+    connect(d, SIGNAL(downloadFailure(QString,QString)), this, SLOT(getTrackerError(QString,QString)));
+    //Just to show that it takes times
+    QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
+    d->downloadUrl("http://www.torrentz.com/announce_"+h.hash());
+  }
+
+  void parseUTorrentList(QString, QString path) {
+    QFile list_file(path);
+    if (!list_file.open(QFile::ReadOnly)) {
+      QMessageBox::warning(this, tr("I/O Error"), tr("Error while trying to open the downloaded file."), QMessageBox::Ok);
+      return;
+    }
+    QList<QUrl> existingTrackers;
+    // Load from torrent handle
+    std::vector<announce_entry> tor_trackers = h.trackers();
+    std::vector<announce_entry>::iterator itr = tor_trackers.begin();
+    while(itr != tor_trackers.end()) {
+      existingTrackers << QUrl(misc::toQString(itr->url));
+      itr++;
+    }
+    // Load from current user list
+    QStringList tmp = trackers_list->toPlainText().split("\n");
+    foreach(QString user_url_str, tmp) {
+      QUrl user_url(user_url_str);
+      if(!existingTrackers.contains(user_url))
+        existingTrackers << user_url;
+    }
+    // Add new trackers to the list
+    if(!trackers_list->toPlainText().isEmpty() && !trackers_list->toPlainText().endsWith("\n"))
+      trackers_list->insertPlainText("\n");
+    int nb = 0;
+    while (!list_file.atEnd()) {
+      QByteArray line = list_file.readLine().trimmed();
+      if(line.isEmpty()) continue;
+      QUrl url(line);
+      if (!existingTrackers.contains(url)) {
+        trackers_list->insertPlainText(line + "\n");
+        ++nb;
+      }
+    }
+    // Clean up
+    list_file.close();
+    list_file.remove();
+    //To restore the cursor ...
+    QApplication::restoreOverrideCursor();
+    // Display information message if necessary
+    if(nb == 0) {
+      QMessageBox::information(this, tr("No change"), tr("No additional trackers were found."), QMessageBox::Ok);
+    }
+  }
+
+  void getTrackerError(QString, QString error) {
+    //To restore the cursor ...
+    QApplication::restoreOverrideCursor();
+    QMessageBox::warning(this, tr("Download error"), tr("The trackers list could not be downloaded, reason: %1").arg(error), QMessageBox::Ok);
+  }
+
+public:
+
+  static QStringList askForTrackers(QTorrentHandle h) {
     QStringList trackers;
-      TrackersAdditionDlg dlg;
+    TrackersAdditionDlg dlg(h);
     if(dlg.exec() == QDialog::Accepted) {
       return dlg.newTrackers();
     }

src/ui/trackersadditiondlg.ui

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>TrackersAdditionDlg</class>
  <widget class="QDialog" name="TrackersAdditionDlg">
@@ -6,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>367</width>
-    <height>201</height>
+    <height>274</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -21,7 +22,58 @@
     </widget>
    </item>
    <item>
-    <widget class="QTextEdit" name="trackers_list" />
+    <widget class="QTextEdit" name="trackers_list">
+     <property name="lineWrapMode">
+      <enum>QTextEdit::NoWrap</enum>
+     </property>
+     <property name="html">
+      <string notr="true">&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
+&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
+p, li { white-space: pre-wrap; }
+&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Sans'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+     <property name="acceptRichText">
+      <bool>false</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLabel" name="label_2">
+     <property name="text">
+      <string>µTorrent compatible list URL:</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLineEdit" name="list_url"/>
+     </item>
+     <item>
+      <widget class="QPushButton" name="uTorrentListButton">
+       <property name="minimumSize">
+        <size>
+         <width>31</width>
+         <height>31</height>
+        </size>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>31</width>
+         <height>31</height>
+        </size>
+       </property>
+       <property name="text">
+        <string notr="true"/>
+       </property>
+       <property name="icon">
+        <iconset resource="../icons.qrc">
+         <normaloff>:/Icons/oxygen/download.png</normaloff>:/Icons/oxygen/download.png</iconset>
+       </property>
+      </widget>
+     </item>
+    </layout>
    </item>
    <item>
     <widget class="QDialogButtonBox" name="buttonBox">
@@ -35,7 +87,9 @@
    </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="../icons.qrc"/>
+ </resources>
  <connections>
   <connection>
    <sender>buttonBox</sender>