Make format_duration more robust

CHANGELOG.md

@@ -1,6 +1,7 @@
-## Unreleased
+## 0.2.0 / 2023-01-09 22:42+01:00
 
 * Show playtime total on session list (https://git.kucharczyk.xyz/lukas/timetracker/issues/6)
+* Make formatting durations more robust, change default duration display to "X hours" (https://git.kucharczyk.xyz/lukas/timetracker/issues/26)
 
 ## 0.1.4 / 2023-01-08 15:45+01:00
 

Dockerfile

@@ -6,7 +6,7 @@ RUN npm install && \
 
 FROM python:3.10.9-alpine
 
-ENV VERSION_NUMBER 0.1.2-11-g025ea0d
+ENV VERSION_NUMBER 0.2.0
 ENV PROD 1
 
 RUN apk add \

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "timetracker"
-version = "0.1.2"
+version = "0.2.0"
 description = "A simple time tracker."
 authors = ["Lukáš Kucharczyk <lukas@kucharczyk.xyz>"]
 license = "GPL"

src/web/common/util/time.py

@@ -18,7 +18,7 @@ def _safe_timedelta(duration: timedelta | int | None):
 
 
 def format_duration(
-    duration: timedelta | int | None, format_string: str = "%H hours %m minutes"
+    duration: timedelta | int | None, format_string: str = "%H hours"
 ) -> str:
     """
     Format timedelta into the specified format_string.
@@ -27,6 +27,10 @@ def format_duration(
     - %m minutes
     - %s seconds
     - %r total seconds
+    Values don't change into higher units if those units are missing
+    from the formatting string. For example:
+    - 61 seconds as "%s" = 61 seconds
+    - 61 seconds as "%m %s" = 1 minutes 1 seconds"
     """
     minute_seconds = 60
     hour_seconds = 60 * minute_seconds
@@ -37,9 +41,14 @@ def format_duration(
     # timestamps where end is before start
     if seconds_total < 0:
         seconds_total = 0
-    days, remainder = divmod(seconds_total, day_seconds)
-    hours, remainder = divmod(remainder, hour_seconds)
-    minutes, seconds = divmod(remainder, minute_seconds)
+    days = hours = minutes = seconds = 0
+    remainder = seconds = seconds_total
+    if "%d" in format_string:
+        days, remainder = divmod(seconds_total, day_seconds)
+    if "%H" in format_string:
+        hours, remainder = divmod(remainder, hour_seconds)
+    if "%m" in format_string:
+        minutes, seconds = divmod(remainder, minute_seconds)
     literals = {
         "%d": str(days),
         "%H": str(hours),

tests/test_time.py

@@ -18,15 +18,40 @@ class FormatDurationTest(unittest.TestCase):
         result = format_duration(delta, "%H hours")
         self.assertEqual(result, "1 hours")
 
+    def test_overflow_hours(self):
+        delta = timedelta(hours=25)
+        result = format_duration(delta, "%H hours")
+        self.assertEqual(result, "25 hours")
+
+    def test_overflow_hours_into_days(self):
+        delta = timedelta(hours=25)
+        result = format_duration(delta, "%d days, %H hours")
+        self.assertEqual(result, "1 days, 1 hours")
+
     def test_only_minutes(self):
         delta = timedelta(minutes=34)
         result = format_duration(delta, "%m minutes")
         self.assertEqual(result, "34 minutes")
 
+    def test_only_overflow_minutes(self):
+        delta = timedelta(minutes=61)
+        result = format_duration(delta, "%m minutes")
+        self.assertEqual(result, "61 minutes")
+
+    def test_overflow_minutes_into_hours(self):
+        delta = timedelta(minutes=61)
+        result = format_duration(delta, "%H hours, %m minutes")
+        self.assertEqual(result, "1 hours, 1 minutes")
+
     def test_only_overflow_seconds(self):
         delta = timedelta(seconds=61)
         result = format_duration(delta, "%s seconds")
-        self.assertEqual(result, "1 seconds")
+        self.assertEqual(result, "61 seconds")
+
+    def test_overflow_seconds_into_minutes(self):
+        delta = timedelta(seconds=61)
+        result = format_duration(delta, "%m minutes, %s seconds")
+        self.assertEqual(result, "1 minutes, 1 seconds")
 
     def test_only_rawseconds(self):
         delta = timedelta(seconds=5690)
@@ -65,4 +90,3 @@ class FormatDurationTest(unittest.TestCase):
 
     def test_number(self):
         self.assertEqual(format_duration(3600, "%H hour"), "1 hour")
-