Minimap attack indicators

core/src/mindustry/game/AttackIndicators.java

@@ -0,0 +1,66 @@
+package mindustry.game;
+
+import arc.math.geom.*;
+import arc.struct.*;
+import arc.util.*;
+import mindustry.annotations.Annotations.*;
+import mindustry.gen.*;
+
+/** Updates and stores attack indicators for the minimap. */
+public class AttackIndicators{
+    private static final float duration = 15f * 60f;
+
+    private LongSeq indicators = new LongSeq(false, 16);
+    private IntIntMap posToIndex = new IntIntMap();
+
+    public LongSeq list(){
+        return indicators;
+    }
+
+    public void clear(){
+        indicators.clear();
+        posToIndex.clear();
+    }
+
+    public void add(int x, int y){
+        int pos = Point2.pack(x, y);
+        int index = posToIndex.get(pos, -1);
+
+        //there is an existing indicator...
+        if(index != -1){
+            //reset its time (new attack)
+            indicators.items[index] = Indicator.time(indicators.items[index], 0f);
+        }else{
+            //new indicator created
+            indicators.add(Indicator.get(pos, 0f));
+            posToIndex.put(pos, indicators.size - 1);
+        }
+    }
+
+    public void update(){
+        long[] items = indicators.items;
+        for(int i = 0; i < indicators.size; i ++){
+            long l = items[i];
+            items[i] = l = Indicator.time(l, Indicator.time(l) + Time.delta);
+
+            if(Indicator.time(l) >= duration){
+                //remove the indicator as it has timed out, make sure to not skip the next one
+                indicators.removeIndex(i);
+                posToIndex.remove(Indicator.pos(l));
+
+                if(indicators.size > 0){
+                    //relocation of head to this new index
+                    posToIndex.put(Indicator.pos(items[i]), i);
+                }
+
+                i --;
+            }
+        }
+    }
+
+    @Struct
+    class IndicatorStruct{
+        int pos;
+        float time;
+    }
+}