From 61755379edd908fc5235d4e7047046538df99de7 Mon Sep 17 00:00:00 2001
From: helmutm <helmutm@fd906abe-77d9-0310-91a1-e0d9ade77398>
Date: Sun, 24 Aug 2008 11:27:48 +0000
Subject: [PATCH] add manager class + functionality

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2849 fd906abe-77d9-0310-91a1-e0d9ade77398
---
 commerce/README.txt    | 29 ++++++++++++++++-------------
 commerce/common.py     | 26 ++++++++++++++++++++++++++
 commerce/interfaces.py | 12 ++++++++++++
 commerce/manager.py    | 41 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 95 insertions(+), 13 deletions(-)
 create mode 100644 commerce/manager.py

diff --git a/commerce/README.txt b/commerce/README.txt
index 6393b03..4b9a8cc 100644
--- a/commerce/README.txt
+++ b/commerce/README.txt
@@ -4,23 +4,27 @@ Commerce: Shope, Products, Customers, Orders, ...
 
   ($Id$)
 
+  >>> from cybertools.commerce.manager import Manager
+  >>> manager = Manager()
+
 
 Shops and Products
 ==================
 
 Let's start with two shops:
 
-  >>> from cybertools.commerce.shop import Shop
-  >>> shop1 = Shop(u'shop1', u'PC up Ltd')
-  >>> shop2 = Shop(u'shop2', u'Video up Ltd')
+  >>> shop1 = manager.shops.create(u'shop1', title=u'PC up Ltd')
+  >>> shop2 = manager.shops.create(u'shop2', title=u'Video up Ltd')
+
+  >>> len(list(manager.shops))
+  2
 
 Now we add products to the shops.
 
-  >>> from cybertools.commerce.product import Product
-  >>> p001 = Product(u'001', u'Silent Case')
-  >>> p002 = Product(u'002', u'Portable Projector')
-  >>> p003 = Product(u'003', u'HD Flatscreen Monitor')
-  >>> p004 = Product(u'004', u'Giga Mainboard')
+  >>> p001 = manager.products.create(u'001', title=u'Silent Case')
+  >>> p002 = manager.products.create(u'002', title=u'Portable Projector')
+  >>> p003 = manager.products.create(u'003', title=u'HD Flatscreen Monitor')
+  >>> p004 = manager.products.create(u'004', title=u'Giga Mainboard')
 
   >>> shop1.products.add(p001)
   >>> shop1.products.add(p003)
@@ -42,11 +46,10 @@ it belongs to.
 Customers
 =========
 
-  >>> from cybertools.commerce.customer import Customer
-  >>> c001 = Customer(u'001', u'Your Local Computer Store')
-  >>> c002 = Customer(u'002', u'Speedy Gonzales')
-  >>> c003 = Customer(u'003', u'TeeVee')
-  >>> c004 = Customer(u'004', u'MacVideo')
+  >>> c001 = manager.customers.create(u'001', title=u'Your Local Computer Store')
+  >>> c002 = manager.customers.create(u'002', title=u'Speedy Gonzales')
+  >>> c003 = manager.customers.create(u'003', title=u'TeeVee')
+  >>> c004 = manager.customers.create(u'004', title=u'MacVideo')
 
   >>> shop1.customers.add(c001)
   >>> shop1.customers.add(c002)
diff --git a/commerce/common.py b/commerce/common.py
index 8c8a102..592e601 100644
--- a/commerce/common.py
+++ b/commerce/common.py
@@ -23,6 +23,32 @@ $Id$
 """
 
 
+class ContainerAttribute(object):
+
+    def __init__(self, factory, idAttr='name'):
+        self.factory = factory
+        self.idAttr = idAttr
+        self.data = {}
+
+    def create(self, id, **kw):
+        if self.idAttr not in kw:
+            kw[self.idAttr] = id
+        obj = self.factory(id)
+        for k, v in kw.items():
+            setattr(obj, k, v)
+        self.data[id] = obj
+        return obj
+
+    def remove(self, id):
+        del self.data[id]
+
+    def get(self, id, default=None):
+        return self.data.get(id, default)
+
+    def __iter__(self):
+        return iter(self.data.values())
+
+
 class RelationSet(object):
 
     def __init__(self, parent, attributeName):
diff --git a/commerce/interfaces.py b/commerce/interfaces.py
index 4e8a09e..03a5788 100644
--- a/commerce/interfaces.py
+++ b/commerce/interfaces.py
@@ -33,6 +33,18 @@ from loops import util
 _ = MessageFactory('cybertools.commerce')
 
 
+# manager
+
+class IManager(Interface):
+    """ A top-level container, registry, manager that provides access to
+        all components of a commerce site.
+    """
+
+    shops = Attribute('All shops in this commerce manager.')
+    products = Attribute('All products in this commerce manager.')
+    customers = Attribute('All customers in this commerce manager.')
+
+
 # shops
 
 class IShop(Interface):
diff --git a/commerce/manager.py b/commerce/manager.py
new file mode 100644
index 0000000..c24b132
--- /dev/null
+++ b/commerce/manager.py
@@ -0,0 +1,41 @@
+#
+#  Copyright (c) 2008 Helmut Merz helmutm@cy55.de
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+The commerce manager (container, registry, ...).
+
+$Id$
+"""
+
+from zope.interface import implements
+
+from cybertools.commerce.common import ContainerAttribute
+from cybertools.commerce.customer import Customer
+from cybertools.commerce.interfaces import IManager
+from cybertools.commerce.product import Product
+from cybertools.commerce.shop import Shop
+
+
+class Manager(object):
+
+    implements(IManager)
+
+    def __init__(self):
+        self.shops = ContainerAttribute(Shop)
+        self.products = ContainerAttribute(Product, 'productId')
+        self.customers = ContainerAttribute(Customer, 'customerId')