Ref T701, utility functions

src/blackmisc/sequence.h

@@ -155,6 +155,9 @@ namespace BlackMisc
         //! Avoid compiler warnings when using with int
         int sizeInt() const { return static_cast<int>(this->size()); }
 
+        //! Convenience function
+        QString sizeString() const { return QString::number(m_impl.size()); }
+
         //! Returns true if the sequence is empty.
         bool empty() const { return m_impl.isEmpty(); }
 
@@ -412,7 +415,8 @@ namespace BlackMisc
         }
 
         //! Reversed order
-        CSequence reversed() const {
+        CSequence reversed() const
+        {
             CSequence result = *this;
             result.reverse();
             return result;

src/blackmisc/simulation/aircraftmodellist.cpp

@@ -525,6 +525,34 @@ namespace BlackMisc
             return icaos;
         }
 
+        QMap<CAirlineIcaoCode, int> CAircraftModelList::countPerAirlineIcao() const
+        {
+            QMap<CAirlineIcaoCode, int> icaos;
+            for (const CAircraftModel &model : *this)
+            {
+                if (!model.hasAirlineDesignator()) { continue; }
+                if (icaos.contains(model.getAirlineIcaoCode()))
+                {
+                    icaos[model.getAirlineIcaoCode()]++;
+                }
+                else
+                {
+                    icaos[model.getAirlineIcaoCode()] = 1;
+                }
+            }
+            return icaos;
+        }
+
+        CAirlineIcaoCode CAircraftModelList::getAirlineWithMaxCount() const
+        {
+            const QMap<CAirlineIcaoCode, int> ac = this->countPerAirlineIcao();
+            if (ac.size() < 1) { return {}; }
+            if (ac.size() == 1) { return ac.firstKey(); }
+            const QList<int> values = ac.values();
+            const int max = *std::max_element(values.begin(), values.end());
+            return ac.key(max);
+        }
+
         QString CAircraftModelList::findModelIconPathByModelString(const QString &modelString) const
         {
             if (modelString.isEmpty()) { return {}; }

src/blackmisc/simulation/aircraftmodellist.h

@@ -364,6 +364,12 @@ namespace BlackMisc
             //! Aircraft ICAO plus count
             QMap<BlackMisc::Aviation::CAircraftIcaoCode, int> countPerAircraftIcao() const;
 
+            //! Airline ICAO plus count
+            QMap<BlackMisc::Aviation::CAirlineIcaoCode, int> countPerAirlineIcao() const;
+
+            //! The airline with the max count
+            Aviation::CAirlineIcaoCode getAirlineWithMaxCount() const;
+
             //! Which simulator(s) have the most entries?
             CSimulatorInfo simulatorsWithMaxEntries() const;