Move time sign (-/+) into prettytime(), and move the countdown pause functionality to its own function

colorbar-fastloop.py

@@ -69,7 +69,16 @@ pixels.show()
 # Use datetime.timedelta to convert an int of seconds to a
 #  string with the format MM:SS
 def prettytime(seconds):
-    return str(datetime.timedelta(seconds=abs(seconds)))[2:]
+    # Add a negative sign to the output when current_time is negative.
+    #  prettytime() puts the given value through abs() because the way
+    #  datetime.timedelta() represents negative values is kind of a PITA
+    #  to deal with.
+    if seconds < 0:
+        display_time_sign = "-"
+    else:
+        display_time_sign = ""
+
+    return display_time_sign + str(datetime.timedelta(seconds=abs(seconds)))[2:]
 
 
 # Set the color on a single neopixel based on colormode and
@@ -108,6 +117,30 @@ def colorizer(pxnum, colormode="fill", yellow=False, red=False):
         raise Exception("Invalid colormode: " + colormode)
 
 
+# Pause the timer until the user resumes it again
+def pause():
+    # We are paused
+    pause = True
+    print("Timer Paused")
+    # Keep looping here as long as we're paused
+    while pause:
+        # Update the debouncer
+        button.update()
+        # Resume timer on single short button press
+        if button.short_count == 1:
+            pause = False
+            print("Timer Resumed")
+        # Reset timer on long press
+        if button.long_press:
+            pause = False
+            print("Timer Reset")
+            # When resetting the timer, return with a specific
+            #  value so that the calling logic can handle this case.
+            return "reset"
+    # If we've exited the loop here, then resume
+    #  the timer by simply returning
+    return
+
 # Count down from the given total seconds, using the chosen
 #   colormode (how the colors are filled into each pixel),
 #   and the given yellowtime (seconds before timer has elapsed
@@ -197,39 +230,17 @@ def countdown(
             # Increment the elapsed time variable
             current_time -= update_interval
 
-            # Add a negative sign to the output when current_time is negative.
-            #  prettytime() puts the given value through abs() because the way
-            #  datetime.timedelta() represents negative values is kind of a PITA
-            #  to deal with.
-            if current_time < 0:
-                display_time_sign = "-"
-            else:
-                display_time_sign = " "
             # Give the user feedback
             #  (this string will eventually go to a ssd1306 OLED display via
             #  displayio, but just put it on the terminal output for now)
-            print("current time: " + display_time_sign + prettytime(current_time))
+            print("current time: " + prettytime(current_time))
 
         # Update the debouncer
         button.update()
 
         # Pause on single short button press
         if button.short_count == 1:
-            # We are paused
+            if pause() == "reset":
-            pause = True
-            print("Timer Paused")
-            # Keep looping here as long as we're paused
-            while pause:
-                # Update the debouncer
-                button.update()
-                # Resume timer on single short button press
-                if button.short_count == 1:
-                    pause = False
-                    print("Timer Resumed")
-                # Reset timer on long press
-                if button.long_press:
-                    pause = False
-                    print("Timer Reset")
                 return
 
 # Hard-coded initial value. (will replace with stored value later)