Initial project commit

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

@@ -0,0 +1,57 @@
+package com.eveningoutpost.dexdrip.G5Model;
+
+import com.eveningoutpost.dexdrip.Models.JoH;
+import com.eveningoutpost.dexdrip.Models.UserError;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import lombok.Getter;
+
+// created by jamorham
+
+public class SessionStartTxMessage extends BaseMessage {
+
+    final byte opcode = 0x26;
+    @Getter
+    private final long startTime;
+    @Getter
+    private final int dexTime;
+
+    public SessionStartTxMessage(int dexTime) {
+        this((int) (JoH.tsl() / 1000), dexTime);
+    }
+
+    public SessionStartTxMessage(long startTime, int dexTime) {
+        this(startTime, dexTime, null);
+    }
+
+    public SessionStartTxMessage(long startTime, int dexTime, String code) {
+        this.startTime = startTime;
+        this.dexTime = dexTime;
+        final boolean using_g6 = (code != null);
+        data = ByteBuffer.allocate(code == null || new G6CalibrationParameters(code).isNullCode() ? (using_g6 ? 13 : 11) : 17);
+        data.order(ByteOrder.LITTLE_ENDIAN);
+        data.put(opcode);
+        data.putInt(dexTime);
+        data.putInt((int) (startTime / 1000));
+
+        if (code != null) {
+            final G6CalibrationParameters params = new G6CalibrationParameters(code);
+            if (params.isValid() && !params.isNullCode()) {
+                data.putShort((short) params.getParamA());
+                data.putShort((short) params.getParamB());
+            } else {
+                if (!params.isValid()) {
+                    throw new IllegalArgumentException("Invalid G6 code in SessionStartTxMessage");
+                }
+            }
+        }
+        if (using_g6) {
+            data.putShort((short) 0x0000);
+        }
+        appendCRC();
+        UserError.Log.d(TAG, "SessionStartTxMessage dbg: " + JoH.bytesToHex(byteSequence));
+    }
+
+}