From ae865c120320e588b288e724c4c680e70648bd5f Mon Sep 17 00:00:00 2001
From: Daniel Vassdal <dsv@meshtech.no>
Date: Tue, 2 Oct 2018 12:53:51 +0200
Subject: [PATCH] Add ZDA message

---
 src/NmeaParser/Nmea/Glonass/Glzda.cs          |  8 ++++
 src/NmeaParser/Nmea/Gnss/Gnzda.cs             |  8 ++++
 src/NmeaParser/Nmea/Gps/GPZDA.cs              |  8 ++++
 src/NmeaParser/Nmea/Zda.cs                    | 38 +++++++++++++++++++
 .../NmeaParser.Tests/NmeaMessages.cs          | 30 +++++++++++++++
 5 files changed, 92 insertions(+)
 create mode 100644 src/NmeaParser/Nmea/Glonass/Glzda.cs
 create mode 100644 src/NmeaParser/Nmea/Gnss/Gnzda.cs
 create mode 100644 src/NmeaParser/Nmea/Gps/GPZDA.cs
 create mode 100644 src/NmeaParser/Nmea/Zda.cs

diff --git a/src/NmeaParser/Nmea/Glonass/Glzda.cs b/src/NmeaParser/Nmea/Glonass/Glzda.cs
new file mode 100644
index 0000000..c0cb0fd
--- /dev/null
+++ b/src/NmeaParser/Nmea/Glonass/Glzda.cs
@@ -0,0 +1,8 @@
+namespace NmeaParser.Nmea.Glonass
+{
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Glzda")]
+    [NmeaMessageType("GLZDA")]
+    public class Glzda : Zda
+    {
+    }
+}
diff --git a/src/NmeaParser/Nmea/Gnss/Gnzda.cs b/src/NmeaParser/Nmea/Gnss/Gnzda.cs
new file mode 100644
index 0000000..00e96eb
--- /dev/null
+++ b/src/NmeaParser/Nmea/Gnss/Gnzda.cs
@@ -0,0 +1,8 @@
+namespace NmeaParser.Nmea.Gnss
+{
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Gnzda")]
+    [NmeaMessageType("GNZDA")]
+    public class Gnzda : Zda
+    {
+    }
+}
diff --git a/src/NmeaParser/Nmea/Gps/GPZDA.cs b/src/NmeaParser/Nmea/Gps/GPZDA.cs
new file mode 100644
index 0000000..6ca6949
--- /dev/null
+++ b/src/NmeaParser/Nmea/Gps/GPZDA.cs
@@ -0,0 +1,8 @@
+namespace NmeaParser.Nmea.Gps
+{
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Gpzda")]
+    [NmeaMessageType("GPZDA")]
+    public class Gpzda : Zda
+    {
+    }
+}
diff --git a/src/NmeaParser/Nmea/Zda.cs b/src/NmeaParser/Nmea/Zda.cs
new file mode 100644
index 0000000..7d2b851
--- /dev/null
+++ b/src/NmeaParser/Nmea/Zda.cs
@@ -0,0 +1,38 @@
+using System;
+using System.Globalization;
+
+namespace NmeaParser.Nmea
+{
+    /// <summary>
+    /// Date and time of fix
+    /// </summary>
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Zda")]
+    public abstract class Zda : NmeaMessage
+    {
+        /// <summary>
+        /// Called when the message is being loaded.
+        /// </summary>
+        /// <param name="message">The NMEA message values.</param>
+        protected override void OnLoadMessage(string[] message)
+        {
+            if (message?.Length != 6)
+            {
+                throw new ArgumentException("Invalid GNGST", nameof(message));
+            }
+
+            var time = StringToTimeSpan(message[0]);
+            var day = int.Parse(message[1], CultureInfo.InvariantCulture);
+            var month = int.Parse(message[2], CultureInfo.InvariantCulture);
+            var year = int.Parse(message[3], CultureInfo.InvariantCulture);
+
+            FixDateTime = new DateTime(year, month, day, time.Hours, time.Minutes,
+                time.Seconds, DateTimeKind.Utc);
+
+            // Index 4 and 5 is used to specify a local time zone.
+            // However I haven't come across any receiver that actually
+            // specify this, so we're just ignoring it.
+        }
+
+        public DateTime FixDateTime { get; private set; }
+    }
+}
diff --git a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
index ef6da1e..23a375d 100644
--- a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
+++ b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
@@ -614,5 +614,35 @@ namespace NmeaParser.Tests
             Assert.AreEqual(0.0, vtg.SpeedInKnots);
             Assert.AreEqual(0.0, vtg.SpeedInKph);
         }
+
+        [TestMethod]
+        public void TestGnzda()
+        {
+            var input = "$GNZDA,075451.00,02,10,2018,00,00*72";
+            var msg = NmeaMessage.Parse(input);
+            Assert.IsInstanceOfType(msg, typeof(Gnzda));
+            var zda = (Gnzda)msg;
+            Assert.AreEqual(new DateTime(2018, 10, 02, 07, 54, 51, 00, DateTimeKind.Utc), zda.FixDateTime);
+        }
+
+        [TestMethod]
+        public void TestGpzda()
+        {
+            var input = "$GPZDA,143042.00,25,08,2005,,*6E";
+            var msg = NmeaMessage.Parse(input);
+            Assert.IsInstanceOfType(msg, typeof(Gpzda));
+            var zda = (Gpzda)msg;
+            Assert.AreEqual(new DateTime(2005, 08, 25, 14, 30, 42, 00, DateTimeKind.Utc), zda.FixDateTime);
+        }
+
+        [TestMethod]
+        public void TestGlzda()
+        {
+            var input = "$GLZDA,225627.00,21,09,2015,00,00*70";
+            var msg = NmeaMessage.Parse(input);
+            Assert.IsInstanceOfType(msg, typeof(Glzda));
+            var zda = (Glzda)msg;
+            Assert.AreEqual(new DateTime(2015, 09, 21, 22, 56, 27, 00, DateTimeKind.Utc), zda.FixDateTime);
+        }
     }
 }