From 95fea42930deb772ebee0a9a76f5deebc93c852f Mon Sep 17 00:00:00 2001
From: Morten Nielsen <no@spam.thx>
Date: Tue, 26 Feb 2019 00:31:15 -0800
Subject: [PATCH] Added ModeIndicator to GLL

---
 src/NmeaParser/Nmea/Gll.cs                    | 26 ++++++++++++++++++-
 .../NmeaParser.Tests/NmeaMessages.cs          | 14 ++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/NmeaParser/Nmea/Gll.cs b/src/NmeaParser/Nmea/Gll.cs
index c0decbd..fb33473 100644
--- a/src/NmeaParser/Nmea/Gll.cs
+++ b/src/NmeaParser/Nmea/Gll.cs
@@ -44,7 +44,20 @@ namespace NmeaParser.Nmea
 				FixTime = StringToTimeSpan(message[4]);
 			}
 			DataActive = (message.Length < 6 || message[5] == "A");
-		}
+            ModeIndicator = DataActive ? Mode.Autonomous : Mode.DataNotValid;
+            if (message.Length > 6)
+            {
+                switch (message[6])
+                {
+                    case "A": ModeIndicator = Mode.Autonomous; break;
+                    case "D": ModeIndicator = Mode.DataNotValid; break;
+                    case "E": ModeIndicator = Mode.EstimatedDeadReckoning; break;
+                    case "M": ModeIndicator = Mode.Manual; break;
+                    case "S": ModeIndicator = Mode.Simulator; break;
+                    case "N": ModeIndicator = Mode.DataNotValid; break;
+                }
+            }
+        }
 
 		/// <summary>
 		/// Latitude
@@ -69,5 +82,16 @@ namespace NmeaParser.Nmea
 		/// </value>
 		public bool DataActive { get; }
 
+        public Mode ModeIndicator { get; }
+
+        public enum Mode
+        {
+            Autonomous,
+            Differential,
+            EstimatedDeadReckoning,
+            Manual,
+            Simulator,
+            DataNotValid
+        }
 	}
 }
diff --git a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
index 199c6b2..4baa579 100644
--- a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
+++ b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
@@ -368,6 +368,20 @@ namespace NmeaParser.Tests
             Assert.AreEqual(-117.196813151667, gll.Longitude, .000000000001);
             Assert.AreEqual(new TimeSpan(0, 23, 57, 15, 0), gll.FixTime);
         }
+        [TestMethod]
+        public void TestLcgll()
+        {
+            string input = "$LCGLL,4728.31,N,12254.25,W,091342,A,A*4C";
+            var msg = NmeaMessage.Parse(input);
+            Assert.IsInstanceOfType(msg, typeof(Gll));
+            Gll gll = (Gll)msg;
+            Assert.AreEqual(Talker.LoranC, gll.TalkerId);
+            Assert.IsTrue(gll.DataActive);
+            Assert.AreEqual(47.471833333333336, gll.Latitude);
+            Assert.AreEqual(-122.90416666666667, gll.Longitude);
+            Assert.AreEqual(new TimeSpan(0, 9, 13, 42, 0), gll.FixTime);
+            Assert.AreEqual(Gll.Mode.Autonomous, gll.ModeIndicator);
+        }