Move calc_counddown() to own file

discord_reminder_bot/countdown.py

@@ -0,0 +1,54 @@
+import datetime
+
+import pytz
+from apscheduler.job import Job
+from apscheduler.triggers.date import DateTrigger
+
+from discord_reminder_bot.settings import config_timezone
+
+
+def calculate(job: Job) -> str:
+    """Get trigger time from a reminder and calculate how many days,
+    hours and minutes till trigger.
+
+    Days/Minutes will not be included if 0.
+
+    Args:
+        job: The job. Can be cron, interval or normal.
+
+    Returns:
+        Returns days, hours and minutes till reminder. Returns "Failed to calculate time" if no job is found.
+    """
+    # TODO: This "breaks" when only seconds are left.
+    # If we use (in {calc_countdown(job)}) it will show (in )
+
+    if type(job.trigger) is DateTrigger:
+        trigger_time = job.trigger.run_date
+    else:
+        trigger_time = job.next_run_time
+
+    # Get_job() returns None when it can't find a job with that id.
+    if trigger_time is None:
+        # TODO: Change this to None and send this text where needed.
+        return "Failed to calculate time"
+
+    # Get time and date the job will run and calculate how many days,
+    # hours and seconds.
+    countdown = trigger_time - datetime.datetime.now(tz=pytz.timezone(config_timezone))
+
+    days, hours, minutes = (
+        countdown.days,
+        countdown.seconds // 3600,
+        countdown.seconds // 60 % 60,
+    )
+
+    # TODO: Explain this.
+    return ", ".join(
+        f"{x} {y}{'s' * (x != 1)}"
+        for x, y in (
+            (days, "day"),
+            (hours, "hour"),
+            (minutes, "minute"),
+        )
+        if x
+    )