Add time calculator

8-scientific-computing-python/2-time-calculator/.replit

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+language = "python3"
+run = "python main.py"

8-scientific-computing-python/2-time-calculator/README.md

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+# Time Calculator
+
+This is the boilerplate for the Time Calculator project. Instructions for building your project can be found at https://www.freecodecamp.org/learn/scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator

8-scientific-computing-python/2-time-calculator/main.py

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+# This entrypoint file to be used in development. Start by reading README.md
+from time_calculator import add_time
+from unittest import main
+
+
+print(add_time("10:10 PM", "3:30", "monday"))
+
+
+# Run unit tests automatically
+main(module='test_module', exit=False)

8-scientific-computing-python/2-time-calculator/test_module.py

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+import unittest
+from time_calculator import add_time
+
+
+class UnitTests(unittest.TestCase):
+    maxDiff = None
+    def test_same_period(self):
+        actual = add_time("3:30 PM", "2:12")
+        expected = "5:42 PM"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "3:30 PM", "2:12" to return "5:42 PM"')
+
+    def test_different_period(self):
+        actual = add_time("11:55 AM", "3:12")
+        expected = "3:07 PM"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "11:55 AM", "3:12" to return "3:07 PM"')
+
+    def test_next_day(self):
+        actual = add_time("9:15 PM", "5:30")
+        expected = "2:45 AM (next day)"
+        self.assertEqual(actual, expected, 'Expected time to end with "(next day)" when it is the next day.')
+
+    def test_period_change_at_twelve(self):
+        actual = add_time("11:40 AM", "0:25")
+        expected = "12:05 PM"
+        self.assertEqual(actual, expected, 'Expected period to change from AM to PM at 12:00')
+
+    def test_twenty_four(self):
+        actual = add_time("2:59 AM", "24:00")
+        expected = "2:59 AM (next day)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "2:59 AM", "24:00" to return "2:59 AM"')
+
+    def test_two_days_later(self):
+        actual = add_time("11:59 PM", "24:05")
+        expected = "12:04 AM (2 days later)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "11:59 PM", "24:05" to return "12:04 AM (2 days later)"')
+
+    def test_high_duration(self):
+        actual = add_time("8:16 PM", "466:02")
+        expected = "6:18 AM (20 days later)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "8:16 PM", "466:02" to return "6:18 AM (20 days later)"')
+
+    def test_no_change(self):
+        actual = add_time("5:01 AM", "0:00")
+        expected = "5:01 AM"
+        self.assertEqual(actual, expected, 'Expected adding 0:00 to return initial time.')
+
+    def test_same_period_with_day(self):
+        actual = add_time("3:30 PM", "2:12", "Monday")
+        expected = "5:42 PM, Monday"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "3:30 PM", "2:12", "Monday" to return "5:42 PM, Monday"')
+
+    def test_twenty_four_with_day(self):
+        actual = add_time("2:59 AM", "24:00", "saturDay")
+        expected = "2:59 AM, Sunday (next day)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "2:59 AM", "24:00", "saturDay" to return "2:59 AM, Sunday (next day)"')
+
+    def test_two_days_later_with_day(self):
+        actual = add_time("11:59 PM", "24:05", "Wednesday")
+        expected = "12:04 AM, Friday (2 days later)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "11:59 PM", "24:05", "Wednesday" to return "12:04 AM, Friday (2 days later)"')
+
+    def test_high_duration_with_day(self):
+        actual = add_time("8:16 PM", "466:02", "tuesday")
+        expected = "6:18 AM, Monday (20 days later)"
+        self.assertEqual(actual, expected, 'Expected calling "add_time()" with "8:16 PM", "466:02", "tuesday" to return "6:18 AM, Monday (20 days later)"')
+
+if __name__ == "__main__":
+    unittest.main()

8-scientific-computing-python/2-time-calculator/time_calculator.py

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+def add_time(start, duration, day="none"):
+    # Split the input variables into useful numbers
+    start = start.split(":")
+    duration = duration.split(":")
+    start_hrs = int(start[0])
+    start_mins = int(start[1].split(" ")[0])
+    start_am_pm = start[1].split(" ")[1]
+    duration_hrs = int(duration[0])
+    duration_mins = int(duration[1])
+
+    if start_am_pm.lower() == "pm": start_hrs = start_hrs + 12 # Convert to 24 hour format because that makes more sense
+
+    new_hrs = start_hrs + duration_hrs
+    new_mins = start_mins + duration_mins
+    dayslater = 0
+
+    # make sure minutes are under 60 and hours get adjusted for every 60 extra minutes
+    while new_mins > 59:
+        new_mins = new_mins - 60
+        new_hrs = new_hrs + 1
+
+    # make sure hours are under 24 and days get adjusted for every 24 extra hours
+    while new_hrs > 23:
+        new_hrs = new_hrs - 24
+        dayslater = dayslater + 1
+
+    # Convert back to 12 hour format
+    if new_hrs > 12:
+        new_hrs = new_hrs - 12
+        new_am_pm = "PM"
+    elif new_hrs == 12:
+        new_am_pm = "PM"
+    else:
+        new_am_pm = "AM"
+
+    if new_hrs == 0 and new_am_pm == "AM": new_hrs = 12 # Adjust for americans being really weird, why the hell is it 12AM and not 0???
+
+    newtime = str(new_hrs) + ":" + str(new_mins).zfill(2) + " " + new_am_pm # Build new timestring
+
+    if day != "none":
+        days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
+        day = day.lower().title()
+        index = days.index(day)
+        new_index = (index + dayslater) % len(days) # wrap around the list to find new day
+        newtime = newtime + ", " + days[new_index] # add day to timestring
+
+    # add number of days to timestring
+    if dayslater == 1:
+        newtime = newtime + " (next day)"
+    elif dayslater > 1:
+        newtime = newtime + " (" + str(dayslater) + " days later)"
+
+    return newtime # done!