Initial model schema, workflow setup button, workflow list view

apps/workflows/models.py

@@ -1,3 +1,144 @@
-from django.db import models
+from __future__ import absolute_import
 
-# Create your models here.
+from django.db import models
+from django.contrib.contenttypes import generic
+from django.contrib.contenttypes.models import ContentType
+from django.utils.translation import ugettext_lazy as _
+
+from permissions.models import StoredPermission
+
+from .literals import OPERAND_CHOICES, OPERAND_AND
+
+
+class Ability(models.Model):
+    label = models.CharField(max_length=128, unique=True, verbose_name = _(u'label'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+
+    def __unicode__(self):
+        return self.label
+ 
+    class Meta:
+        verbose_name = _(u'ability')
+        verbose_name_plural = _(u'abilities')
+    
+
+class Workflow(models.Model):
+    label = models.CharField(max_length=128, unique=True, verbose_name = _(u'label'))
+    initial_state = models.ForeignKey('WorkflowState', related_name='workflow_initial_state', blank=True, null=True, verbose_name=_(u'initial state'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+    
+    def __unicode__(self):
+        return self.label
+ 
+    class Meta:
+        verbose_name = _(u'workflow')
+        verbose_name_plural = _(u'workflows')
+        
+        
+class State(models.Model):
+    label = models.CharField(max_length=128, verbose_name=_(u'label'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+
+    def __unicode__(self):
+        #return '%s (%s)' % (self.name, self.workflow.name)
+        return self.label
+
+    class Meta:
+        verbose_name = _(u'state')
+        verbose_name_plural = _(u'states')
+        
+
+class Transition(models.Model):
+    label = models.CharField(max_length=128, verbose_name=_(u'label'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+
+    def __unicode__(self):
+        #return '%s (%s)' % (self.name, self.workflow.name)
+        return self.label
+
+    class Meta:
+        verbose_name = _(u'transition')
+        verbose_name_plural = _(u'transitions')
+    
+    
+class WorkflowState(models.Model):
+    workflow = models.ForeignKey(Workflow, related_name='workflow_state_workflow', verbose_name=_(u'workflow'))
+    state = models.ForeignKey(State, related_name='workflow_state_state', verbose_name=_(u'state'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+        
+    def __unicode__(self):
+        #return '%s (%s)' % (self.label, self.workflow.label)
+        return unicode(self.state)
+
+    class Meta:
+        verbose_name = _(u'workflow state')
+        verbose_name_plural = _(u'workflows states')
+
+
+class WorkflowStateAbilityGrant(models.Model):
+    workflow_state = models.ForeignKey(WorkflowState, related_name='workflow_state_ability', verbose_name=_(u'workflow state'))
+    content_type = models.ForeignKey(ContentType, related_name='workflow_state_ability_object')#, blank=True, null=True)
+    object_id = models.PositiveIntegerField()#blank=True, null=True)
+    content_object = generic.GenericForeignKey(ct_field='content_type', fk_field='object_id')
+
+    def __unicode__(self):
+        return unicode(self.content_object)
+
+    class Meta:
+        verbose_name = _(u'workflow state ability grant')
+        verbose_name_plural = _(u'workflows states ability grant')
+
+#TODO: WorkflowStateACLEntry
+#WorkflowState
+#Actor
+#Object
+#Permission (s)
+
+
+#TODO: WorkflowStateAlarm
+#label
+#timedate
+#interval
+
+        
+class WorkflowStateTransition(models.Model):
+    workflow_state_source = models.ForeignKey(WorkflowState, related_name='workflow_state_transition_source', verbose_name=_(u'workflow state source'))
+    transition = models.ForeignKey(Transition, related_name='workflow_state_transition', verbose_name=_(u'transition'))
+    workflow_state_destination = models.ForeignKey(WorkflowState, related_name='workflow_state_transition_destination', verbose_name=_(u'workflow state destination'))
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+        
+    def __unicode__(self):
+        return unicode(self.transition)
+
+    class Meta:
+        verbose_name = _(u'workflow state transition')
+        verbose_name_plural = _(u'workflows states transitions')        
+        
+
+class WorkflowStateTransitionAbility(models.Model):
+    attribute_comparison_operand = models.CharField(max_length=8, default=OPERAND_AND, choices=OPERAND_CHOICES, verbose_name=_(u'operand'))
+    negate = models.BooleanField(verbose_name=_(u'negate'), help_text=_(u'Inverts the attribute comparison.'))
+    ability = models.ForeignKey(Ability, related_name='workflow_state_transition_ability', verbose_name=_(u'ability'))
+
+    description = models.TextField(blank=True, verbose_name=_(u'description'))
+
+    def __unicode__(self):
+        return unicode(self.ability)
+
+    class Meta:
+        verbose_name = _(u'transition')
+        verbose_name_plural = _(u'transitions')
+      
+        
+class WorkflowInstance(models.Model):
+    workflow = models.ForeignKey(Workflow, verbose_name = _(u'workflow'))
+    content_type = models.ForeignKey(ContentType, verbose_name=_(u'Content type'), related_name='workflow_instance_object')#, blank=True, null=True)
+    object_id = models.PositiveIntegerField()#blank=True, null=True)
+    content_object = generic.GenericForeignKey(ct_field='content_type', fk_field='object_id')
+    workflow_state = models.ForeignKey(WorkflowState, related_name='workflow_instance_state', verbose_name=_(u'state'))
+
+    def __unicode__(self):
+        return unicode(self.content_object)
+    
+    class Meta:
+        unique_together = ('content_type', 'object_id', 'workflow')