[libcalamares] Clean up requirements model API

- don't need friends
- made modify-the-model API public where it makes sense
- improve naming

src/libcalamares/modulesystem/RequirementsChecker.cpp

@@ -32,7 +32,6 @@ RequirementsChecker::RequirementsChecker( QVector< Module* > modules, Requiremen
     , m_progressTimer( nullptr )
     , m_progressTimeouts( 0 )
 {
-    m_model->clear();
     m_watchers.reserve( m_modules.count() );
     connect( this, &RequirementsChecker::requirementsProgress, model, &RequirementsModel::setProgressMessage );
 }
@@ -77,7 +76,7 @@ RequirementsChecker::finished()
         }
 
         m_model->describe();
-        m_model->changeRequirementsList();
+        m_model->reCheckList();
         QTimer::singleShot( 0, this, &RequirementsChecker::done );
     }
 }

src/libcalamares/modulesystem/RequirementsModel.cpp

@@ -19,24 +19,38 @@ void
 RequirementsModel::clear()
 {
     QMutexLocker l( &m_addLock );
-    emit beginResetModel();
+    beginResetModel();
     m_requirements.clear();
-    changeRequirementsList();
-    emit endResetModel();
+    endResetModel();
+    reCheckList();
 }
 
 void
 RequirementsModel::addRequirementsList( const Calamares::RequirementsList& requirements )
 {
     QMutexLocker l( &m_addLock );
-    emit beginResetModel();
-    m_requirements.append( requirements );
-    changeRequirementsList();
-    emit endResetModel();
+
+    beginResetModel();
+    for ( const auto& r : requirements )
+    {
+        auto it = std::find_if( m_requirements.begin(),
+                                m_requirements.end(),
+                                [ &r ]( const Calamares::RequirementEntry& re ) { return r.name == re.name; } );
+        if ( it != m_requirements.end() )
+        {
+            *it = r;
+        }
+        else
+        {
+            m_requirements.append( r );
+        }
+    }
+    endResetModel();
+    reCheckList();
 }
 
 void
-RequirementsModel::changeRequirementsList()
+RequirementsModel::reCheckList()
 {
     auto isUnSatisfied = []( const Calamares::RequirementEntry& e ) { return !e.satisfied; };
     auto isMandatoryAndUnSatisfied = []( const Calamares::RequirementEntry& e ) { return e.mandatory && !e.satisfied; };
@@ -44,8 +58,8 @@ RequirementsModel::changeRequirementsList()
     m_satisfiedRequirements = std::none_of( m_requirements.begin(), m_requirements.end(), isUnSatisfied );
     m_satisfiedMandatory = std::none_of( m_requirements.begin(), m_requirements.end(), isMandatoryAndUnSatisfied );
 
-    emit satisfiedRequirementsChanged( m_satisfiedRequirements );
-    emit satisfiedMandatoryChanged( m_satisfiedMandatory );
+    Q_EMIT satisfiedRequirementsChanged( m_satisfiedRequirements );
+    Q_EMIT satisfiedMandatoryChanged( m_satisfiedMandatory );
 }
 
 int
@@ -108,7 +122,7 @@ void
 RequirementsModel::setProgressMessage( const QString& m )
 {
     m_progressMessage = m;
-    emit progressMessageChanged( m_progressMessage );
+    Q_EMIT progressMessageChanged( m_progressMessage );
 }
 
 }  // namespace Calamares

src/libcalamares/modulesystem/RequirementsModel.h

@@ -33,8 +33,6 @@ class RequirementsChecker;
  */
 class DLLEXPORT RequirementsModel : public QAbstractListModel
 {
-    friend class RequirementsChecker;
-
     Q_OBJECT
     Q_PROPERTY( bool satisfiedRequirements READ satisfiedRequirements NOTIFY satisfiedRequirementsChanged FINAL )
     Q_PROPERTY( bool satisfiedMandatory READ satisfiedMandatory NOTIFY satisfiedMandatoryChanged FINAL )
@@ -69,6 +67,15 @@ public:
     ///@brief Debugging tool, describe the checking-state
     void describe() const;
 
+    ///@brief Update progress message (called by the checker)
+    void setProgressMessage( const QString& m );
+
+    ///@brief Append some requirements; resets the model
+    void addRequirementsList( const Calamares::RequirementsList& requirements );
+
+    ///@brief Check the whole list, emit signals satisfied...()
+    void reCheckList();
+
 signals:
     void satisfiedRequirementsChanged( bool value );
     void satisfiedMandatoryChanged( bool value );
@@ -77,20 +84,10 @@ signals:
 protected:
     QHash< int, QByteArray > roleNames() const override;
 
-
     ///@brief Clears the requirements; resets the model
     void clear();
 
-    ///@brief Append some requirements; resets the model
-    void addRequirementsList( const Calamares::RequirementsList& requirements );
-
-    ///@brief Update progress message (called by the checker)
-    void setProgressMessage( const QString& m );
-
 private:
-    ///@brief Implementation for {set,add}RequirementsList
-    void changeRequirementsList();
-
     QString m_progressMessage;
     QMutex m_addLock;
     RequirementsList m_requirements;