7f184927bd
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2176 fd906abe-77d9-0310-91a1-e0d9ade77398
154 lines
3.7 KiB
Python
154 lines
3.7 KiB
Python
#
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# Copyright (c) 2007 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Basic classes for rules and actions.
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$Id$
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"""
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from zope import component
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from zope.component import adapts
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from zope.interface import implements
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from cybertools.composer.base import Component, Element, Compound
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from cybertools.composer.base import Template
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from cybertools.composer.interfaces import IInstance
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from cybertools.composer.rule.interfaces import IRuleManager, IRule
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from cybertools.composer.rule.interfaces import IRuleInstance
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from cybertools.composer.rule.interfaces import IEvent, ICondition
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from cybertools.composer.rule.interfaces import IAction, IActionHandler
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from cybertools.util.jeep import Jeep
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# rules
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class RuleManager(object):
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implements(IRuleManager)
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rulesFactory = Jeep
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rules = None
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def addRule(self, rule):
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rule.manager = self
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if self.rules is None:
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self.rules = self.rulesFactory()
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for e in rule.events:
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entry = self.rules.setdefault(e.name, [])
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entry.append(rule)
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def getRulesForEvent(self, event):
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return self.rules and self.rules.get(event.name, []) or []
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def handleEvent(self, event):
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result = []
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rules = self.getRulesForEvent(event)
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for r in rules:
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ri = IRuleInstance(event.context)
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ri.template = r
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ri.event = event
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result.append(ri.applyTemplate())
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return result
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class Rule(Template):
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implements(IRule)
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name = title = description = u''
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manager = None
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actions = None
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events = None
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conditions = None
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def __init__(self, name, **kw):
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self.name = name
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for k, v in kw.items():
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setattr(self, k, v)
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self.events = []
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self.conditions = []
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self.actions = []
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# events
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class EventType(object):
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def __init__(self, name, title=None):
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self.name = name
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self.title = title or name
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class Event(object):
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implements(IEvent)
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def __init__(self, eventType, context=None, request=None):
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self.eventType = eventType
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self.name = eventType.name
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self.title = eventType.title
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self.context = context
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self.request = request
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# conditions
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class Condition(object):
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implements(ICondition)
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adapts(IRuleInstance)
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def __init__(self, context):
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self.context = context
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def __call__(self, context, params):
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return True
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# actions
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class Action(Component):
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implements(IAction)
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name = u''
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handlerName = u''
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parameters = None
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rule = None
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def __init__(self, name, **kw):
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self.name = name
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for k, v in kw.items():
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setattr(self, k, v)
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if self.parameters is None:
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self.parameters = {}
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if not self.handlerName:
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self.handlerName = name
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class ActionHandler(object):
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implements(IActionHandler)
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adapts(IRuleInstance)
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def __init__(self, context):
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self.context = context
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def __call__(self, data, params={}):
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return data
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