1 files changed, 31 insertions, 0 deletions
diff --git a/src/gui/tasks/duration.py b/src/gui/tasks/duration.py
new file mode 100644
index 0000000..d1b7106
--- /dev/null
+++ b/src/gui/tasks/duration.py
@@ -0,0 +1,31 @@
+import re
+from typing import Optional
+import math
+
+def format(minutes: int):
+    if minutes >= 60 * 24:
+        return '' + str(math.floor(minutes / 60 / 24)) + 'd'
+    elif minutes >= 60:
+        return '' + str(math.floor(minutes / 60)) + 'h'
+    elif minutes > 0:
+        return '' + str(minutes) + 'm'
+    else:
+        return ''
+
+def parse(duration: str) -> Optional[int]:
+    duration = duration.strip()
+    if duration:
+        result = re.match('^(\d+)([mhd])$', duration.strip())
+        if result:
+            n = int(result.group(1))
+            unit = result.group(2)
+            if unit == 'm':
+                return n
+            elif unit == 'h':
+                return n * 60
+            elif unit == 'd':
+                return n * 60 * 24
+        else:
+            return None
+    else:
+        return 0