1 files changed, 69 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/xmpp/mam/MamReference.java b/src/main/java/de/pixart/messenger/xmpp/mam/MamReference.java
new file mode 100644
index 000000000..788e04889
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/xmpp/mam/MamReference.java
@@ -0,0 +1,69 @@
+package de.pixart.messenger.xmpp.mam;
+
+public class MamReference {
+
+    private final long timestamp;
+    private final String reference;
+
+    public MamReference(long timestamp) {
+        this.timestamp = timestamp;
+        this.reference = null;
+    }
+
+    public MamReference(long timestamp, String reference) {
+        this.timestamp = timestamp;
+        this.reference = reference;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+
+    public String getReference() {
+        return reference;
+    }
+
+    public boolean greaterThan(MamReference b) {
+        return timestamp > b.getTimestamp();
+    }
+
+    public boolean greaterThan(long b) {
+        return timestamp > b;
+    }
+
+    public static MamReference max(MamReference a, MamReference b) {
+        if (a != null && b != null) {
+            return a.timestamp > b.timestamp ? a : b;
+        } else if (a != null) {
+            return a;
+        } else {
+            return b;
+        }
+    }
+
+    public static MamReference max(MamReference a, long b) {
+        return max(a,new MamReference(b));
+    }
+
+    public static MamReference fromAttribute(String attr) {
+        if (attr == null) {
+            return new MamReference(0);
+        } else {
+            String[] attrs = attr.split(":");
+            try {
+                long timestamp = Long.parseLong(attrs[0]);
+                if (attrs.length >= 2) {
+                    return new MamReference(timestamp,attrs[1]);
+                } else {
+                    return new MamReference(timestamp);
+                }
+            } catch (Exception e) {
+                return new MamReference(0);
+            }
+        }
+    }
+
+    public MamReference timeOnly() {
+        return reference == null ? this : new MamReference(timestamp);
+    }
+}
+\ No newline at end of file