renamed modules dir

pandalib-util/src/main/java/fr/pandacube/lib/util/AmountPerTimeLimiter.java

@@ -0,0 +1,57 @@
+package fr.pandacube.lib.util;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class AmountPerTimeLimiter {
+	private final double maxAmount;
+	private final long duration;
+	
+	private List<Entry> entries = new ArrayList<>();
+	
+	public AmountPerTimeLimiter(double a, long d) {
+		maxAmount = a;
+		duration = d;
+	}
+	
+	
+	
+	
+	
+	private static class Entry {
+		private final long time;
+		private double amount;
+		public Entry(long t, double a) {
+			time = t; amount = a;
+		}
+	}
+	
+	
+	public synchronized double getAmountSinceDuration() {
+		long currT = System.currentTimeMillis();
+		entries = entries.stream()
+				.filter(e -> e.time > currT - duration)
+				.collect(Collectors.toList());
+				
+		return entries.stream()
+				.mapToDouble(e -> e.amount)
+				.sum();
+	}
+	
+	public synchronized void add(double amount) {
+		long currT = System.currentTimeMillis();
+		if (!entries.isEmpty() && entries.get(entries.size()-1).time > currT - 1000)
+			entries.get(entries.size()-1).amount += amount;
+		else
+			entries.add(new Entry(System.currentTimeMillis(), amount));
+	}
+	
+	public boolean canAdd(double amount) {
+		return getAmountSinceDuration() + amount < maxAmount;
+	}
+	
+	public double getRemainingForNow() {
+		return Math.max(0, maxAmount - getAmountSinceDuration());
+	}
+}