Initial project commit

lib/nightscout/com/eveningoutpost/dexdrip/G5Model/TransmitterTimeRxMessage.java

@@ -0,0 +1,60 @@
+package com.eveningoutpost.dexdrip.G5Model;
+
+import com.eveningoutpost.dexdrip.Models.JoH;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import lombok.Getter;
+
+/**
+ * Created by joeginley on 3/28/16.
+ */
+public class TransmitterTimeRxMessage extends BaseMessage {
+    public static final byte opcode = 0x25;
+    @Getter
+    private TransmitterStatus status;
+    @Getter
+    private int currentTime;
+    @Getter
+    private int sessionStartTime;
+
+    public TransmitterTimeRxMessage(byte[] packet) {
+        if (packet.length >= 10) {
+            if (packet[0] == opcode && checkCRC(packet)) {
+                data = ByteBuffer.wrap(packet).order(ByteOrder.LITTLE_ENDIAN);
+
+                status = TransmitterStatus.getBatteryLevel(data.get(1));
+                currentTime = data.getInt(2);
+                sessionStartTime = data.getInt(6);
+                // TODO more bytes after this?
+            }
+        }
+    }
+
+    public boolean sessionInProgress() {
+        return sessionStartTime != -1 && currentTime != sessionStartTime;
+    }
+
+    public long getRealSessionStartTime(long now) {
+        return now - ((currentTime - sessionStartTime) * 1000);
+    }
+
+    public long getRealSessionStartTime() {
+
+        if (sessionInProgress()) {
+            return getRealSessionStartTime(JoH.tsl());
+        } else {
+            return -1;
+        }
+    }
+
+    public long getSessionDuration() {
+        if (sessionInProgress()) {
+            return JoH.msSince(getRealSessionStartTime());
+        } else {
+            return -1;
+        }
+    }
+
+}