Last.fm authentication

data/data.qrc

@@ -38,5 +38,6 @@
         <file>last.fm/neighbour_radio.png</file>
         <file>last.fm/personal_radio.png</file>
         <file>last.fm/recommended_radio.png</file>
+        <file>spinner.gif</file>
     </qresource>
 </RCC>

src/busyindicator.cpp

@@ -0,0 +1,22 @@
+#include "busyindicator.h"
+
+#include <QMovie>
+
+BusyIndicator::BusyIndicator(QWidget* parent)
+    : QLabel(parent),
+      movie_(new QMovie(":spinner.gif"))
+{
+  setMovie(movie_);
+}
+
+BusyIndicator::~BusyIndicator() {
+  delete movie_;
+}
+
+void BusyIndicator::showEvent(QShowEvent*) {
+  movie_->start();
+}
+
+void BusyIndicator::hideEvent(QHideEvent*) {
+  movie_->stop();
+}

src/busyindicator.h

@@ -0,0 +1,23 @@
+#ifndef BUSYINDICATOR_H
+#define BUSYINDICATOR_H
+
+#include <QLabel>
+
+class QMovie;
+
+class BusyIndicator : public QLabel {
+  Q_OBJECT
+
+ public:
+  BusyIndicator(QWidget* parent = 0);
+  ~BusyIndicator();
+
+ protected:
+  void showEvent(QShowEvent* event);
+  void hideEvent(QHideEvent* event);
+
+ private:
+  QMovie* movie_;
+};
+
+#endif // BUSYINDICATOR_H

src/lastfmconfig.cpp

@@ -0,0 +1,43 @@
+#include "lastfmconfig.h"
+#include "lastfmservice.h"
+
+#include <lastfm/ws.h>
+
+#include <QMessageBox>
+
+LastFMConfig::LastFMConfig(LastFMService* service, QWidget *parent)
+  : QDialog(parent),
+    service_(service)
+{
+  ui_.setupUi(this);
+
+  ui_.username->setText(lastfm::ws::Username);
+  ui_.busy->hide();
+
+  connect(service_, SIGNAL(AuthenticationComplete(bool)), SLOT(AuthenticationComplete(bool)));
+}
+
+void LastFMConfig::accept() {
+  if (ui_.username->text().isEmpty() || ui_.password->text().isEmpty()) {
+    QDialog::accept();
+    return;
+  }
+
+  ui_.busy->show();
+  ui_.button_box->setEnabled(false);
+
+  service_->Authenticate(ui_.username->text(), ui_.password->text());
+}
+
+void LastFMConfig::AuthenticationComplete(bool success) {
+  ui_.busy->hide();
+  ui_.button_box->setEnabled(true);
+
+  if (success) {
+    ui_.username->setText(lastfm::ws::Username);
+    ui_.password->clear();
+    QDialog::accept();
+  } else {
+    QMessageBox::warning(this, "Authentication failed", "Your Last.fm credentials were incorrect");
+  }
+}

src/lastfmconfig.h

@@ -0,0 +1,26 @@
+#ifndef LASTFMCONFIG_H
+#define LASTFMCONFIG_H
+
+#include <QDialog>
+
+#include "ui_lastfmconfig.h"
+
+class LastFMService;
+
+class LastFMConfig : public QDialog {
+  Q_OBJECT
+
+ public:
+  LastFMConfig(LastFMService* service, QWidget* parent = 0);
+
+  void accept();
+
+ private slots:
+  void AuthenticationComplete(bool success);
+
+ private:
+  Ui::LastFMConfig ui_;
+  LastFMService* service_;
+};
+
+#endif // LASTFMCONFIG_H

src/lastfmconfig.ui

@@ -0,0 +1,173 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>LastFMConfig</class>
+ <widget class="QDialog" name="LastFMConfig">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>385</width>
+    <height>255</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Last.fm</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Enter your Last.fm details below:</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <layout class="QFormLayout" name="formLayout">
+     <item row="0" column="0">
+      <widget class="QLabel" name="label_2">
+       <property name="text">
+        <string>Last.fm username</string>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1">
+      <widget class="QLineEdit" name="username"/>
+     </item>
+     <item row="1" column="0">
+      <widget class="QLabel" name="label_3">
+       <property name="text">
+        <string>Last.fm password</string>
+       </property>
+      </widget>
+     </item>
+     <item row="1" column="1">
+      <widget class="QLineEdit" name="password">
+       <property name="echoMode">
+        <enum>QLineEdit::Password</enum>
+       </property>
+      </widget>
+     </item>
+     <item row="2" column="0" colspan="2">
+      <widget class="QCheckBox" name="scrobble">
+       <property name="text">
+        <string>Scrobble tracks that I listen to</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="Line" name="line">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLabel" name="label_4">
+     <property name="text">
+      <string>&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 Serif'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Note that you must be a &lt;span style=&quot; font-weight:600;&quot;&gt;paid subscriber&lt;/span&gt; to listen to Last.fm radio from within Tangerine.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item>
+    <widget class="QWidget" name="busy" native="true">
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>Authenticating...</string>
+        </property>
+        <property name="alignment">
+         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="BusyIndicator" name="label_6">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="button_box">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>BusyIndicator</class>
+   <extends>QLabel</extends>
+   <header>busyindicator.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>button_box</sender>
+   <signal>accepted()</signal>
+   <receiver>LastFMConfig</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>button_box</sender>
+   <signal>rejected()</signal>
+   <receiver>LastFMConfig</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/lastfmservice.cpp

@@ -1,9 +1,31 @@
 #include "lastfmservice.h"
+#include "lastfmconfig.h"
 #include "radioitem.h"
 
+#include <lastfm/ws.h>
+#include <lastfm/misc.h>
+#include <lastfm/XmlQuery>
+
+#include <QSettings>
+
+const char* LastFMService::kSettingsGroup = "Last.fm";
+
 LastFMService::LastFMService(QObject* parent)
   : RadioService("Last.fm", parent)
 {
+  lastfm::ws::ApiKey = "75d20fb472be99275392aefa2760ea09";
+  lastfm::ws::SharedSecret = "d3072b60ae626be12be69448f5c46e70";
+
+  QSettings settings;
+  settings.beginGroup(kSettingsGroup);
+  lastfm::ws::Username = settings.value("user").toString();
+  lastfm::ws::SessionKey = settings.value("session").toString();
+
+  config_ = new LastFMConfig(this);
+}
+
+LastFMService::~LastFMService() {
+  delete config_;
 }
 
 RadioItem* LastFMService::CreateRootItem(RadioItem* parent) {
@@ -15,6 +37,7 @@ RadioItem* LastFMService::CreateRootItem(RadioItem* parent) {
 void LastFMService::LazyPopulate(RadioItem *item) {
   switch (item->type) {
     case RadioItem::Type_Service:
+      // Create child items
       CreateStationItem(Type_MyRecommendations, "My Recommendations",
                         ":last.fm/recommended_radio.png", item);
       CreateStationItem(Type_MyRadio, "My Radio Station",
@@ -23,7 +46,16 @@ void LastFMService::LazyPopulate(RadioItem *item) {
                         ":last.fm/loved_radio.png", item);
       CreateStationItem(Type_MyNeighbourhood, "My Neighbourhood",
                         ":last.fm/neighbour_radio.png", item);
+
+      if (lastfm::ws::SessionKey.isEmpty())
+        config_->show();
+      break;
+
+    default:
+      break;
   }
+
+  item->lazy_loaded = true;
 }
 
 RadioItem* LastFMService::CreateStationItem(ItemType type, const QString& name,
@@ -34,3 +66,41 @@ RadioItem* LastFMService::CreateStationItem(ItemType type, const QString& name,
 
   return ret;
 }
+
+void LastFMService::Authenticate(const QString& username, const QString& password) {
+  QMap<QString, QString> params;
+  params["method"] = "auth.getMobileSession";
+  params["username"] = username;
+  params["authToken"] = lastfm::md5((username + lastfm::md5(password.toUtf8())).toUtf8());
+
+  QNetworkReply* reply = lastfm::ws::post(params);
+  connect(reply, SIGNAL(finished()), SLOT(AuthenticateReplyFinished()));
+}
+
+void LastFMService::AuthenticateReplyFinished() {
+  QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
+  if (!reply) {
+    emit AuthenticationComplete(false);
+    return;
+  }
+
+  // Parse the reply
+  try {
+    lastfm::XmlQuery const lfm = lastfm::ws::parse(reply);
+
+    lastfm::ws::Username = lfm["session"]["name"].text();
+    lastfm::ws::SessionKey = lfm["session"]["key"].text();
+  } catch (std::runtime_error& e) {
+    qDebug() << e.what();
+    emit AuthenticationComplete(false);
+    return;
+  }
+
+  // Save the session key
+  QSettings settings;
+  settings.beginGroup(kSettingsGroup);
+  settings.setValue("username", lastfm::ws::Username);
+  settings.setValue("session", lastfm::ws::SessionKey);
+
+  emit AuthenticationComplete(true);
+}

src/lastfmservice.h

@@ -3,9 +3,16 @@
 
 #include "radioservice.h"
 
+class LastFMConfig;
+
 class LastFMService : public RadioService {
+  Q_OBJECT
+
  public:
   LastFMService(QObject* parent = 0);
+  ~LastFMService();
+
+  static const char* kSettingsGroup;
 
   enum ItemType {
     Type_MyRecommendations = 1000,
@@ -17,9 +24,20 @@ class LastFMService : public RadioService {
   RadioItem* CreateRootItem(RadioItem* parent);
   void LazyPopulate(RadioItem *item);
 
+  void Authenticate(const QString& username, const QString& password);
+
+ signals:
+  void AuthenticationComplete(bool success);
+
+ private slots:
+  void AuthenticateReplyFinished();
+
  private:
   RadioItem* CreateStationItem(ItemType type, const QString& name,
                                const QString& icon, RadioItem* parent);
+
+ private:
+  LastFMConfig* config_;
 };
 
 #endif // LASTFMSERVICE_H

src/radioservice.h

@@ -10,6 +10,7 @@ class RadioService : public QObject {
 
  public:
   RadioService(const QString& name, QObject* parent = 0);
+  virtual ~RadioService() {}
 
   QString name() const { return name_; }
 

src/simpletreemodel.h

@@ -72,6 +72,7 @@ QModelIndex SimpleTreeModel<T>::parent(const QModelIndex& index) const {
 template <typename T>
 int SimpleTreeModel<T>::rowCount(const QModelIndex & parent) const {
   T* item = IndexToItem(parent);
+  if (!item->lazy_loaded)
     const_cast<SimpleTreeModel<T>*>(this)->LazyPopulate(item); // Ahem
 
   return item->children.count();

src/src.pro

@@ -2,7 +2,7 @@
 # Project created by QtCreator 2009-12-15T18:38:35
 # -------------------------------------------------
 QT += sql \
-    opengl
+    network opengl xml
 TARGET = tangerine
 TEMPLATE = app
 SOURCES += main.cpp \
@@ -36,7 +36,9 @@ SOURCES += main.cpp \
     radioitem.cpp \
     radioservice.cpp \
     lastfmservice.cpp \
-    radiomodel.cpp
+    radiomodel.cpp \
+    lastfmconfig.cpp \
+    busyindicator.cpp
 HEADERS += mainwindow.h \
     player.h \
     library.h \
@@ -72,13 +74,17 @@ HEADERS += mainwindow.h \
     radioservice.h \
     lastfmservice.h \
     simpletreemodel.h \
-    radiomodel.h
+    radiomodel.h \
+    lastfmconfig.h \
+    busyindicator.h
 FORMS += mainwindow.ui \
     libraryconfig.ui \
-    fileview.ui
+    fileview.ui \
+    lastfmconfig.ui
 RESOURCES += ../data/data.qrc
 OTHER_FILES += ../data/schema.sql \
     ../data/mainwindow.css
+LIBS += -llastfm
 !win32 { 
     QMAKE_CXXFLAGS += $$system(taglib-config --cflags)
     LIBS += $$system(taglib-config --libs)