1 files changed, 93 insertions, 0 deletions
diff --git a/src/TimeOperations.cs b/src/TimeOperations.cs
new file mode 100644
index 0000000..2bd3fc9
--- /dev/null
+++ b/src/TimeOperations.cs
@@ -0,0 +1,93 @@
+namespace hyprwatch.Time
+{
+    using System;
+
+    public class TimeOperations
+    {
+        public static string TimeDifference(string a, string b)
+        {
+            int hr = int.Parse(b.Substring(0, 2)) - int.Parse(a.Substring(0, 2));
+            int mn = int.Parse(b.Substring(3, 2)) - int.Parse(a.Substring(3, 2));
+            int sec = int.Parse(b.Substring(6, 2)) - int.Parse(a.Substring(6, 2));
+
+            if (mn < 0 && sec < 0)
+            {
+                hr -= 1;
+                mn += 60 - 1;
+                sec += 60;
+                if (hr < 0) hr += 24;
+            }
+            else if (mn < 0 && sec >= 0)
+            {
+                hr -= 1;
+                mn += 60;
+                if (hr < 0) hr += 24;
+            }
+            else if (sec < 0 && mn > 0)
+            {
+                sec += 60;
+                mn -= 1;
+                if (hr < 0) hr += 24;
+            }
+            else if (sec < 0 && mn == 0)
+            {
+                hr -= 1;
+                mn = 59;
+                sec += 60;
+            }
+
+            return $"{hr:D2}:{mn:D2}:{sec:D2}";
+        }
+
+        public static string TimeAddition(string a, string b)
+        {
+            int hr = int.Parse(b.Substring(0, 2)) + int.Parse(a.Substring(0, 2));
+            int mn = int.Parse(b.Substring(3, 2)) + int.Parse(a.Substring(3, 2));
+            int sec = int.Parse(b.Substring(6, 2)) + int.Parse(a.Substring(6, 2));
+
+            if (mn >= 60 && sec >= 60)
+            {
+                hr += 1;
+                mn = mn - 60 + 1;
+                sec -= 60;
+            }
+            else if (mn >= 60)
+            {
+                hr += 1;
+                mn -= 60;
+            }
+            else if (sec >= 60)
+            {
+                mn += 1;
+                sec -= 60;
+            }
+
+            return $"{hr:D2}:{mn:D2}:{sec:D2}";
+        }
+
+        public static string FormatTime(string t)
+        {
+            return $"{t.Substring(0, 2)}h {t.Substring(3, 2)}m {t.Substring(6)}s";
+        }
+
+        public static int ConvertIntoSec(string t)
+        {
+            int hr = int.Parse(t.Substring(0, 2));
+            int mn = int.Parse(t.Substring(3, 2));
+            int sec = int.Parse(t.Substring(6));
+            return hr * 3600 + mn * 60 + sec;
+        }
+
+        public static string Convert(int sec)
+        {
+            sec %= 24 * 3600;
+            int hr = sec / 3600;
+            sec %= 3600;
+            int mn = sec / 60;
+            sec %= 60;
+
+            return $"{hr:D2}:{mn:D2}:{sec:D2}";
+        }
+    }
+}
+