[Checkins] SVN: Sandbox/luciano/kirbi/src/kirbi/copy.py added book copy module

[Luciano Ramalho]

Log message for revision 78812:
  added book copy module
  

Changed:
  A   Sandbox/luciano/kirbi/src/kirbi/copy.py

-=-
Added: Sandbox/luciano/kirbi/src/kirbi/copy.py
===================================================================
--- Sandbox/luciano/kirbi/src/kirbi/copy.py	                        (rev 0)
+++ Sandbox/luciano/kirbi/src/kirbi/copy.py	2007-08-14 16:32:47 UTC (rev 78812)
@@ -0,0 +1,70 @@
+import grok
+from zope.interface import Interface, implements
+from zope import schema
+
+class ICopy(Interface):
+    """An exemplar of a book."""
+    
+    book_id = schema.TextLine(title=u"Book id",
+                    description=u"The id of the book of which this is a copy.",
+                    required=True)
+    description = schema.Text(title=u"Description",
+                    description=(u"Details of this copy, such as autographs,"
+                                 u"marks, damage etc."),
+                            required=False)
+    #XXX: This should be filled automatically.
+    catalog_date = schema.Date(title=u"Catalog date",
+                    description=u"Date when added to your collection.",
+                            required=False)
+    
+class Copy(grok.Container):
+    """An exemplar of a book.
+    
+    A Copy is associated to a Book instance.
+    
+    A Copy can contain Lease instances, recording each time it was lent.   
+    """
+
+    implements(ICopy)
+    
+    def __init__(self, login, name, password):
+        super(User, self).__init__()        
+
+class ILease(Interface):
+    """A book lease."""
+    
+    copy_id = schema.TextLine(title=u"Copy id",
+                    description=u"The id of the copy being lent.",
+                    required=True)
+
+    # Note: the lender_id can usually be obtained from the copy, however if a
+    # copy is given to a new owner, the lease history would become incomplete.
+    lender_id = schema.Text(title=u"Lender",
+                            description=(u"Lender login."),
+                            required=True)
+
+    borrower_id = schema.Text(title=u"Borrower",
+                            description=(u"Borrower login."),
+                            required=True)
+
+    #XXX: This should be filled automatically.
+    request_date = schema.Date(title=u"Request date",
+                    description=u"When the lease was requested.",
+                    required=False)
+
+    delivery_date = schema.Date(title=u"Delivery date",
+                    description=u"When the copy was delivered to the borrower.",
+                    required=False)
+
+    due_date = schema.Date(title=u"Due date",
+                description=u"When the copy should be returned to the lender.",
+                required=False)
+                           
+    return_date = schema.Date(title=u"Returnd date",
+                    description=u"When the copy was returned to the lender.",
+                    required=False)
+
+    @invariant
+    def dueAfterDelivery(lease):
+        if not (lease.due_date > lease.delivery_date):
+            raise Invalid(u'The due date must be after the delivery date.')