work in progress: task management with work items

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3092 fd906abe-77d9-0310-91a1-e0d9ade77398

organize/README.txt

@@ -93,7 +93,7 @@ so we do not have to set up real objects.
 
   >>> wi01 = workItems.add('001', 'john')
   >>> wi01
-  <WorkItem ['001', 1, 'john', '...', 'created']:
+  <WorkItem ['001', 1, 'john', '...', 'new']:
    {'created': ..., 'creator': 'john'}>
 
 Properties that have not been set explicitly have a default of None; properties
@@ -110,20 +110,16 @@ Certain (not all) properties may be set after creation.
 
   >>> wi01.setInitData(planStart=1229955772, planDuration=600, party='annie')
   >>> wi01
-  <WorkItem ['001', 1, 'annie', '2008-12-22 14:22', 'created']:
+  <WorkItem ['001', 1, 'annie', '2008-12-22 14:22', 'new']:
    {'created': ..., 'planEnd': 1229956372, 'planDuration': 600,
     'planStart': 1229955772, 'creator': 'john', 'planEffort': 600}>
 
-It's not possible to change a value after it has been set, even if it is
+It's possible to change a value after it has been set as long as the work
-set via an automatic calculation like for the ``planEffort`` field.
+item is in state 'new'.
 
-  >>> wi01.setInitData(planEffort=400)
+  >>> wi01.setInitData(planEffort=700)
-  Traceback (most recent call last):
+  >>> wi01.planEffort
-  ...
+  700
-  ValueError: Attribute 'planEffort' already set to '600'.
-
-There is one exception to this rule: The party may be changed as long as
-the work item is not in the ``assigned`` state.
 
   >>> wi01.setInitData(party='jim')
   >>> wi01.userName
@@ -141,7 +137,7 @@ that the work item is assigned to may not be changed any more.
   >>> wi01.setInitData(party='annie')
   Traceback (most recent call last):
   ...
-  ValueError: Attribute 'party' may not be set in state 'assigned'.
+  ValueError: Attribute 'party' already set to 'jim'.
 
 Jim now really starts to work. The start time is usually set automatically
 but may also be specified explicitly.
@@ -151,7 +147,7 @@ but may also be specified explicitly.
   <WorkItem ['001', 1, 'jim', '2008-12-22 15:00', 'running']:
    {'created': ..., 'planEnd': 1229956372, 'start': 1229958000,
     'assigned': ..., 'planDuration': 600, 'planStart': 1229955772,
-    'creator': 'john', 'planEffort': 600}>
+    'creator': 'john', 'planEffort': 700}>
 
 Stopping work
 -------------

organize/interfaces.py

@@ -476,6 +476,17 @@ class IWorkItem(Interface):
             as keyword arguments.
         """
 
+    def doAction(action, **kw):
+        """ Execute an action.
+
+            Actions are usually a sequence of transitions together with
+            setting some properties depending on the action and
+            the starting state.
+
+            Available actions are: plan, delegate, accept, start, finish,
+            cancel, continue, transfer.
+        """
+
 
 class IWorkItems(Interface):
     """ A collection (manager, container) of work items.

organize/work.py

@@ -41,7 +41,7 @@ _not_found = object()
 @implementer(IStatesDefinition)
 def workItemStates():
     return StatesDefinition('workItemStates',
-        State('created', 'created', ('assign', 'cancel',), color='red'),
+        State('new', 'new', ('assign', 'cancel',), color='red'),
         State('assigned', 'assigned', ('start', 'finish', 'cancel', 'transfer'),
               color='yellow'),
         State('running', 'running', ('finish', 'continue', 'cancel', 'transfer'),
@@ -57,7 +57,7 @@ def workItemStates():
         Transition('continue', 'continue', 'continued'),
         Transition('transfer', 'transfer', 'transferred'),
         Transition('cancel', 'cancel', 'cancelled'),
-        initialState='created')
+        initialState='new')
 
 
 class WorkItem(Stateful):
@@ -99,20 +99,16 @@ class WorkItemTrack(WorkItem, Track):
         return self.userName
 
     def setInitData(self, **kw):
+        indexChanged = False
+        updatePlanData = False
         for k in kw:
             if k not in self.initAttributes:
                 raise ValueError("Illegal initial attribute: '%s'." % k)
+        self.checkOverwrite(kw)
         party = kw.pop('party', None)
         if party is not None:
-            if self.state != 'created':
+            self.userName = party
-                raise ValueError("Attribute 'party' may not be set in state '%s'." %
+            indexChanged = True
-                                 self.state)
-            else:
-                self.userName = party
-                indexChanged = True
-        self.checkOverwrite(kw)
-        updatePlanData = False
-        indexChanged = False
         data = self.data
         for k, v in kw.items():
             data[k] = v
@@ -174,10 +170,36 @@ class WorkItemTrack(WorkItem, Track):
             self.data['successor'] = getName(new)
             return new
 
+    # actions
+
+    def doAction(self, action, **kw):
+        # TODO: check if action is allowed
+        m = getattr(self, 'action_' + action)
+        m(**kw)
+
+    def action_start(self, **kw):
+        if self.state == 'new':
+            self.assign(kw.pop('party', None))
+        self.startWork(**kw)
+
+    def action_finish(self, **kw):
+        if self.state == 'new':
+            self.assign(kw.pop('party', None))
+        self.stopWork(**kw)
+        #pred = self.predecessor    # better to finish predecessors manually?
+        #while pred is not None:
+        #    wi = getParent(self)[pred]
+        #    wi.doTransition('finish')
+        #    pred = wi.pred
+
+    # auxiliary methods
+
     def reindex(self):
         getParent(self).updateTrack(self, {})   # force reindex
 
     def checkOverwrite(self, kw):
+        if self.state == 'new':
+            return
         for k, v in kw.items():
             old = getattr(self, k, None)
             if old is not None and old != v: