gacks/gackscalendar.py

   1 from gacksexcep import *
   2 from gackshandle import *
   3
   4 class GacksCalendar:
   5     def __init__(self):
   6         pass
   7
   8     def query(self, id=None, unitStart=0, unitStop=INFINITY, timeStart=0, timeStop=INFINITY):
   9         pass
  10
  11     def insert_record(self, item):
  12         pass
  13
  14     def query_handles(self, handles):
  15         results = []
  16         for handle in handles:
  17             items = query(handle.id, handle.unitStart, handle.unitStop, handle.timeStart, handle.timeStop)
  18             for item in items:
  19                 if not item.is_in_list(results):
  20                     results.append(item)
  21         return results
  22
  23     def update_record(self, item):
  24         remove_record(item)
  25         insert_record(item)
  26
  27 class GacksListCalendar(GacksCalendar):
  28     def __init__(self):
  29         self.items = []
  30
  31     def test_id(self, x, y):
  32         if not x:
  33             return True
  34         else:
  35             return (x == y)
  36
  37     def test_lesser(self, x, y):
  38         if not x:
  39             return True
  40         elif y==INFINITY:
  41             return True
  42         else:
  43             return (x<y)
  44
  45     def test_greater(self, x, y):
  46         if not x:
  47             return True
  48         elif x==INFINITY:
  49             return True
  50         elif y==INFINITY:
  51             return False
  52         else:
  53             return (x>y)
  54
  55     def query(self, id=None, unitStart=0, unitStop=INFINITY, timeStart=0, timeStop=INFINITY):
  56         list = []
  57         for item in self.items:
  58             if self.test_id(id, item.id) and \
  59                self.test_lesser(unitStart, item.unitStop) and \
  60                self.test_greater(unitStop, item.unitStart) and \
  61                self.test_lesser(timeStart, item.timeStop) and \
  62                self.test_greater(timeStop, item.timeStart):
  63                  list.append(item)
  64         return list
  65
  66     def find_record(self, item_to_delete):
  67         list = []
  68         for item in self.items:
  69             if item.is_same_cell(item_to_delete):
  70                 list.append(item)
  71
  72         if not list:
  73             return None
  74
  75         if len(list) > 1:
  76             raise GacksMultipleRecordCollision(item_to_delete.as_string())
  77
  78         return list[0]
  79
  80     def insert_record(self, item):
  81         conflicts = self.query(item.id, item.unitStart, item.unitStop, item.timeStart, item.timeStop)
  82         if conflicts:
  83             raise GacksConflictingInsert(item.as_string())
  84
  85         self.items.append(item)
  86
  87     def remove_record(self, item):
  88          existing_record = self.find_record(item)
  89          if existing_record:
  90              self.items.remove(existing_record)
  91
  92