Optionally ignore weekends when calculating importance.

No tests though, not sure how to properly test this. Monkey patching the
datetime module doesn't appear to be working on Linux.

Config.py

@@ -14,3 +14,4 @@ TAG_DUE = 'due'
 TAG_STAR = 'star'
 
 SORT_STRING = 'desc:importance,due,desc:priority'
+IGNORE_WEEKENDS = True # for calculating the importance value

Importance.py

@@ -7,14 +7,29 @@ today may have a higher importance than high priority tasks in the distant
 future.
 """
 
+import datetime
+
 import Config
 
 IMPORTANCE_VALUE = {'A': 3, 'B': 2, 'C': 1}
 
-def importance(p_todo):
+def is_due_next_monday(p_todo):
+    """ Returns True when the given task is due next Monday. """
+    today = datetime.date.today()
+    due = p_todo.due_date()
+
+    return due and due.weekday() == 0 and today.weekday() >= 4 and \
+        p_todo.days_till_due()
+
+def importance(p_todo, p_ignore_weekend=False):
     """
     Calculates the importance of the given task.
     Returns an importance of zero when the task has been completed.
+
+    If p_ignore_weekend is True, the importance value of the due date will be
+    calculated as if Friday is immediately followed by Monday. This in case of
+    a todo list at the office and you don't work during the weekends (you
+    don't, right?)
     """
     result = 2
 
@@ -35,6 +50,9 @@ def importance(p_todo):
         elif days_left < 0:
             result += 6
 
+    if p_ignore_weekend and is_due_next_monday(p_todo):
+        result += 1
+
     if p_todo.has_tag(Config.TAG_STAR):
         result += 1
 

Sorter.py

@@ -3,6 +3,7 @@
 import datetime
 import re
 
+import Config
 from Importance import importance
 
 def is_priority_field(p_field):
@@ -28,7 +29,7 @@ def get_field_function(p_field):
         result = (lambda a: a.completion_date() if a.completion_date() \
             else datetime.date.max)
     elif p_field == 'importance':
-        result = importance
+        result = lambda a: importance(a, Config.IGNORE_WEEKENDS)
     elif p_field == 'text':
         result = lambda a: a.text()
     else: