Data cache

app/src/main/java/eu/ztsh/garmin/data/DataCache.kt

@@ -0,0 +1,66 @@
+package eu.ztsh.garmin.data
+
+import com.mapbox.navigation.ui.maneuver.model.Maneuver
+
+class DataCache {
+
+    private val stateCache: State = State()
+    private var maneuverCache: Maneuver? = null
+
+    // state
+    fun hasChanged(lanes: Lanes?): Boolean {
+        return stateCache.lineArrows == null || stateCache.lineArrows != lanes
+    }
+
+    fun hasChanged(outlines: Outlines?): Boolean {
+        return stateCache.lineOutlines == null || stateCache.lineOutlines != outlines
+    }
+
+    fun hasChanged(distance: Distance?): Boolean {
+        return stateCache.distance == null || stateCache.distance != distance
+    }
+
+    fun hasChanged(direction: Direction?): Boolean {
+        return stateCache.direction == null || stateCache.direction != direction
+    }
+
+    fun hasChanged(speed: Speed?): Boolean {
+        return stateCache.speed == null || stateCache.speed != speed
+    }
+
+    fun hasChanged(arrival: Arrival?): Boolean {
+        return stateCache.arrival == null || stateCache.arrival != arrival
+    }
+
+    // Merge states
+    fun update(state: State) {
+        if (state.lineArrows != null) {
+            stateCache.lineArrows = state.lineArrows
+        }
+        if (state.lineOutlines != null) {
+            state.lineOutlines = state.lineOutlines
+        }
+        if (state.direction != null) {
+            stateCache.direction = state.direction
+        }
+        if (state.distance != null) {
+            stateCache.distance = state.distance
+        }
+        if (state.speed != null) {
+            stateCache.speed = state.speed
+        }
+        if (state.arrival != null) {
+            stateCache.arrival = state.arrival
+        }
+    }
+
+    // maneuver
+    fun hasChanged(maneuver: Maneuver): Boolean {
+        return maneuverCache == null || maneuverCache!! != maneuver
+    }
+
+    fun update(maneuver: Maneuver) {
+        maneuverCache = maneuver
+    }
+
+}