Better auto transfer anchor time deltas

The previous ones were a bit too optimisitc in some cases.

autotests/data/timeline/multi-traveler-merge-with-countryinfo.model

@@ -40,7 +40,7 @@
                 "@value": "2000-01-01T13:00:00+01:00",
                 "timezone": "Europe/Berlin"
             },
-            "anchorTimeDelta": 3600,
+            "anchorTimeDelta": 5400,
             "floatingLocationType": "FavoriteLocation",
             "from": {
                 "@type": "Location",

autotests/data/timeline/weather-forecast-with-tz-change.model

@@ -152,7 +152,7 @@
                 "@value": "1996-10-16T17:50:00+02:00",
                 "timezone": "Europe/Berlin"
             },
-            "anchorTimeDelta": 3600,
+            "anchorTimeDelta": 5400,
             "floatingLocationType": "FavoriteLocation",
             "from": {
                 "@type": "Location",
@@ -390,7 +390,7 @@
                 "@value": "1996-10-17T17:35:00+03:00",
                 "timezone": "Europe/Helsinki"
             },
-            "anchorTimeDelta": 3600,
+            "anchorTimeDelta": 5400,
             "floatingLocationType": "Reservation",
             "from": {
                 "@type": "Location",

autotests/transfertest.cpp

@@ -76,7 +76,7 @@ private Q_SLOTS:
         auto transfer = mgr.transfer(batchId, Transfer::Before);
         QCOMPARE(transfer.state(), Transfer::Pending);
         QCOMPARE(transfer.anchorTime(), QDateTime({2017, 9, 10}, {6, 15}, QTimeZone("Europe/Berlin")));
-        QCOMPARE(transfer.anchorTimeDelta(), 3600);
+        QCOMPARE(transfer.anchorTimeDelta(), 5400);
         QCOMPARE(transfer.alignment(), Transfer::Before);
         QCOMPARE(transfer.reservationId(), batchId);
         QVERIFY(transfer.from().hasCoordinate());

src/app/transfermanager.cpp

@@ -417,17 +417,32 @@ bool TransferManager::isNotInTripGroup(const QString &resId) const
     return m_tgMgr->tripGroupIdForReservation(resId).isEmpty();
 }
 
+// default transfer anchor deltas (in minutes)
+enum { FlightDelta, TrainDelta, BusDelta, FallbackDelta };
+static constexpr const int default_deltas[][2] = {
+    { 90, 30 }, // Flight
+    { 20, 10 }, // Train
+    { 15, 10 }, // Bus
+    { 30, 15 }, // anything else
+};
+
 void TransferManager::determineAnchorDeltaDefault(Transfer &transfer, const QVariant &res) const
 {
     if (transfer.state() != Transfer::UndefinedState) {
         return;
     }
 
+    int delta;
     if (JsonLd::isA<FlightReservation>(res)) {
-        transfer.setAnchorTimeDelta(transfer.alignment() == Transfer::Before ? 60 * 60 : 30 * 60);
+        delta = default_deltas[FlightDelta][transfer.alignment()];
+    } else if (JsonLd::isA<TrainReservation>(res)) {
+        delta = default_deltas[TrainDelta][transfer.alignment()];
+    } else if (JsonLd::isA<BusReservation>(res)) {
+        delta = default_deltas[BusDelta][transfer.alignment()];
     } else {
-        transfer.setAnchorTimeDelta(10 * 60);
+        delta = default_deltas[FallbackDelta][transfer.alignment()];
     }
+    transfer.setAnchorTimeDelta(delta * 60);
 }
 
 QDateTime TransferManager::anchorTimeBefore(const QString &resId, const QVariant &res) const