feat(core): support negative numbers when Calculating ticket duration for ticket meta and comments

enables time to be subtracted when negative value added to duration field.

ref: #250 #96 #93 #95 #90 #264 #266

app/core/templatetags/markdown.py

@@ -42,10 +42,17 @@ def to_duration(value):
         str: Duration value in format 00h 00m 00s
     """
 
-    hours = int(int(value)//3600)
+    hour = int(3600)
+    minute = int(60)
 
-    minutes = int((int(value)%3600)//60)
+    if '-' in value:
+        hour = int(-3600)
+        minute = int(-60)
 
-    seconds = int((int(value)%3600)%60)
+    hours = int(int(value)//hour)
+
+    minutes = int((int(value)%hour)//minute)
+
+    seconds = int((int(value)%hour)%minute)
 
     return str("{:02d}h {:02d}m {:02d}s".format(hours, minutes, seconds))

app/core/tests/unit/ticket/test_ticket_permission.py

@@ -821,6 +821,16 @@ class TicketPermissions(
         assert action_comment
 
 
+    @pytest.mark.skip(reason='to be written')
+    def test_ticket_action_comment_project_added(self):
+        """Action Comment test
+        Confirm a 'project added' action comment is created for the ticket
+        when a project is added
+        """
+
+        pass
+
+
     @pytest.mark.skip(reason='to be written')
     def test_ticket_action_comment_related_ticket_removed(self):
         """Action Comment test