[tracking] Implement KUserFeedback configuration

- write config files to turn on KUserFeedback (for known areas)
- TODO: get the right home directory to write in

src/modules/tracking/TrackingJobs.cpp

@@ -162,3 +162,72 @@ true
             tr( "Could not configure machine feedback correctly, Calamares error %1." ).arg( r ) );
     }
 }
+
+void
+TrackingUserJob::addJob( Calamares::JobList& list, UserTrackingConfig* config )
+{
+    if ( config->isEnabled() )
+    {
+        const auto style = config->userTrackingStyle();
+        if ( style == "kuserfeedback" )
+        {
+            list.append( Calamares::job_ptr( new TrackingKUserFeedbackJob() ) );
+        }
+        else
+        {
+            cWarning() << "Unsupported user tracking style" << style;
+        }
+    }
+}
+
+QString
+TrackingKUserFeedbackJob::prettyName() const
+{
+    return tr( "KDE user feedback" );
+}
+
+QString
+TrackingKUserFeedbackJob::prettyDescription() const
+{
+    return prettyName();
+}
+
+QString
+TrackingKUserFeedbackJob::prettyStatusMessage() const
+{
+    return tr( "Configuring KDE user feedback." );
+}
+
+Calamares::JobResult
+TrackingKUserFeedbackJob::exec()
+{
+    // This is the contents of a config file to turn on some kind
+    // of KUserFeedback tracking; the level (16) is chosen for minimal
+    // but not zero tracking.
+    static const char config[] = R"x([Global]
+FeedbackLevel=16
+)x";
+
+    for ( const QString& area : QStringList { "PlasmaUserFeedback" } )
+    {
+        // TODO: get the configured user name
+        QString path = QStringLiteral( "/home/%1/.config/%2" ).arg( QString(), area );
+        cDebug() << "Configuring KUserFeedback" << path;
+
+        int r = CalamaresUtils::System::instance()->createTargetFile( path, config );
+        if ( r > 0 )
+        {
+            return Calamares::JobResult::error(
+                tr( "Error in KDE user feedback configuration." ),
+                tr( "Could not configure KDE user feedback correctly, script error %1." ).arg( r ) );
+        }
+        else if ( r < 0 )
+        {
+            return Calamares::JobResult::error(
+                tr( "Error in KDE user feedback configuration." ),
+                tr( "Could not configure KDE user feedback correctly, Calamares error %1." ).arg( r ) );
+        }
+    }
+
+    return Calamares::JobResult::ok();
+}

src/modules/tracking/TrackingJobs.h

@@ -23,6 +23,7 @@
 
 class InstallTrackingConfig;
 class MachineTrackingConfig;
+class UserTrackingConfig;
 
 class QSemaphore;
 
@@ -75,6 +76,12 @@ public:
     static void addJob( Calamares::JobList& list, MachineTrackingConfig* config );
 };
 
+/** @brief Tracking machines, KDE neon style
+ *
+ * The machine has a machine-id, and this is sed(1)'ed into the
+ * update-manager configuration, to report the machine-id back
+ * to KDE neon servers.
+ */
 class TrackingMachineNeonJob : public TrackingMachineJob
 {
     Q_OBJECT
@@ -85,5 +92,32 @@ public:
     Calamares::JobResult exec() override;
 };
 
+/** @brief Base class for user-tracking jobs
+ *
+ * User-tracking configuration depends on the distro / style of user
+ * tracking being implemented, so there are subclasses to switch on the
+ * relevant kind of tracking. Users are tracked persistently (the user
+ * can of course configure the tracking again once the system is restarted).
+ */
+class TrackingUserJob : public Calamares::Job
+{
+public:
+    static void addJob( Calamares::JobList& list, UserTrackingConfig* config );
+};
+
+/** @brief Turn on KUserFeedback in target system
+ *
+ * This writes suitable files for turning on KUserFeedback for the
+ * normal user configured in Calamares. The feedback can be reconfigured
+ * by the user through Plasma's user-feedback dialog.
+ */
+class TrackingKUserFeedbackJob : public Calamares::Job
+{
+public:
+    QString prettyName() const override;
+    QString prettyDescription() const override;
+    QString prettyStatusMessage() const override;
+    Calamares::JobResult exec() override;
+};
 
 #endif