We can rebuild it without ORM. We have the technology.

eos/base/election.py

@@ -0,0 +1,45 @@
+#   Eos - Verifiable elections
+#   Copyright © 2017  RunasSudo (Yingtong Li)
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as published by
+#   the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from eos.core.objects import *
+from eos.base.workflow import *
+
+class BallotQuestion(EmbeddedObject):
+	pass
+
+class PlaintextBallotQuestion(BallotQuestion):
+	choices = ListField(IntField())
+
+class Ballot(EmbeddedObject):
+	_id = UUIDField()
+	questions = EmbeddedObjectListField(BallotQuestion)
+
+class Voter(EmbeddedObject):
+	_id = UUIDField()
+	ballots = EmbeddedObjectListField(Ballot)
+
+class Question(EmbeddedObject):
+	prompt = StringField()
+
+class ApprovalQuestion(Question):
+	choices = ListField(StringField())
+
+class Election(TopLevelObject):
+	_id = UUIDField()
+	workflow = EmbeddedObjectField(Workflow)
+	name = StringField()
+	voters = EmbeddedObjectListField(Voter, hashed=False)
+	questions = EmbeddedObjectListField(Question)

eos/base/tests.py

@@ -0,0 +1,68 @@
+#   Eos - Verifiable elections
+#   Copyright © 2017  RunasSudo (Yingtong Li)
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as published by
+#   the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from unittest import TestCase
+
+from eos.base.election import *
+from eos.base.workflow import *
+from eos.core.objects import *
+
+class ElectionTestCase(TestCase):
+	@classmethod
+	def setUpClass(cls):
+		client.drop_database('test')
+	
+	def test_run_election(self):
+		# Set up election
+		election = Election()
+		election.workflow = WorkflowBase(election)
+		
+		self.assertEqual(election.workflow.get_task('eos.base.workflow.TaskConfigureElection').status, WorkflowTask.Status.READY)
+		
+		election.name = 'Test Election'
+		
+		for i in range(3):
+			election.voters.append(Voter())
+		
+		question = ApprovalQuestion()
+		question.prompt = 'President'
+		question.choices.append('John Smith')
+		question.choices.append('Joe Bloggs')
+		question.choices.append('John Q. Public')
+		election.questions.append(question)
+		
+		question = ApprovalQuestion()
+		question.prompt = 'Chairman'
+		question.choices.append('John Doe')
+		question.choices.append('Andrew Citizen')
+		election.questions.append(question)
+		
+		#election.save()
+		
+		# Check that it saved
+		#self.assertEqual(Election.objects.get(0)._id, election._id) # TODO: Compare JSON
+		
+		# Retrieve from scratch, too
+		#self.db.close()
+		#self.db = mongoengine.connect('test')
+		#self.assertEqual(Election.objects.get(0)._id, election._id)
+		
+		# Freeze election
+		self.assertEqual(election.workflow.get_task('eos.base.workflow.TaskConfigureElection').status, WorkflowTask.Status.READY)
+		self.assertEqual(election.workflow.get_task('eos.base.workflow.TaskOpenVoting').status, WorkflowTask.Status.NOT_READY)
+		election.workflow.get_task('eos.base.workflow.TaskConfigureElection').exit()
+		self.assertEqual(election.workflow.get_task('eos.base.workflow.TaskConfigureElection').status, WorkflowTask.Status.EXITED)
+		self.assertEqual(election.workflow.get_task('eos.base.workflow.TaskOpenVoting').status, WorkflowTask.Status.READY)

eos/base/workflow.py

@@ -0,0 +1,114 @@
+#   Eos - Verifiable elections
+#   Copyright © 2017  RunasSudo (Yingtong Li)
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as published by
+#   the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from eos.core.objects import *
+
+class WorkflowTask(EmbeddedObject):
+	class Status:
+		NOT_READY = 10
+		READY = 20
+		#ENTERED = 30
+		#COMPLETE = 40
+		EXITED = 50
+	
+	depends_on = []
+	provides = []
+	
+	status = IntField()
+	
+	def __init__(self, workflow=None, *args, **kwargs):
+		super().__init__(*args, **kwargs)
+		
+		self.workflow = workflow
+		
+		if self.workflow is None:
+			self.workflow = self._instance
+		
+		self.status = WorkflowTask.Status.READY if self.are_dependencies_met() else WorkflowTask.Status.NOT_READY
+		
+		self.listeners = {
+			'exit': []
+		}
+		
+		# Helpers
+		
+		def on_dependency_exit():
+			self.status = WorkflowTask.Status.READY if self.are_dependencies_met() else WorkflowTask.Status.NOT_READY
+		for depends_on_desc in self.depends_on:
+			for depends_on_task in self.workflow.get_tasks(depends_on_desc):
+				depends_on_task.listeners['exit'].append(on_dependency_exit)
+	
+	def are_dependencies_met(self):
+		for depends_on_desc in self.depends_on:
+			for depends_on_task in self.workflow.get_tasks(depends_on_desc):
+				if depends_on_task.status is not WorkflowTask.Status.EXITED:
+					return False
+		return True
+	
+	@classmethod
+	def satisfies(cls, descriptor):
+		return cls._name == descriptor or descriptor in cls.provides
+	
+	def fire_event(self, event):
+		for listener in self.listeners[event]:
+			listener()
+	
+	def exit(self):
+		if self.status is not WorkflowTask.Status.READY:
+			raise Exception()
+		
+		self.status = WorkflowTask.Status.EXITED
+		self.fire_event('exit')
+
+class Workflow(EmbeddedObject):
+	tasks = EmbeddedObjectListField(WorkflowTask)
+	meta = {
+		'abstract': True
+	}
+	
+	def __init__(self, election=None, *args, **kwargs):
+		super().__init__(*args, **kwargs)
+		self.election = election if election else self._instance
+	
+	def get_tasks(self, descriptor):
+		yield from (task for task in self.tasks if task.satisfies(descriptor))
+	
+	def get_task(self, descriptor):
+		try:
+			return next(self.get_tasks(descriptor))
+		except StopIteration:
+			return None
+
+# Concrete tasks
+# ==============
+
+class TaskConfigureElection(WorkflowTask):
+	#def on_enter(self):
+	#	self.status = WorkflowTask.Status.COMPLETE
+	pass
+
+class TaskOpenVoting(WorkflowTask):
+	depends_on = ['eos.base.workflow.TaskConfigureElection']
+
+# Concrete workflows
+# ==================
+
+class WorkflowBase(Workflow):
+	def __init__(self, election=None, *args, **kwargs):
+		super().__init__(election, *args, **kwargs)
+		
+		self.tasks.append(TaskConfigureElection(self))
+		self.tasks.append(TaskOpenVoting(self))

eos/core/bigint/js.py

@@ -75,7 +75,6 @@ class BigInt(EosObject):
 			('__ge__', lambda x: x >= 0)
 		]:
 			def make_operator_func(func_):
-				# Create a closure
 				def operator_func(other):
 					if not isinstance(other, BigInt):
 						other = BigInt(other)

eos/core/objects/python.py

@@ -14,61 +14,95 @@
 #   You should have received a copy of the GNU Affero General Public License
 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import mongoengine
+import pymongo
+
+import uuid
+
+# Database
+# ========
+
+client = pymongo.MongoClient()
+db = client['test']
+
+# Fields
+# ======
 
 class Field:
 	def __init__(self, *args, **kwargs):
-		if 'default' in kwargs:
-			self.required = False
-			self.default = kwargs['default']
-		else:
-			self.required = True
-			self.default = None
+		self.default = kwargs.get('default', None)
+		self.hashed = kwargs.get('hashed', True)
 
 class PrimitiveField(Field):
-	def to_python(self):
-		return self.mongo_field(
-			required=self.required,
-			default=self.default
-		)
+	def serialise(self, value):
+		return value
+	
+	def deserialise(self, value):
+		return value
 
-class StringField(PrimitiveField):
-	mongo_field = mongoengine.StringField
+DictField = PrimitiveField
+IntField = PrimitiveField
+ListField = PrimitiveField
+StringField = PrimitiveField
+
+class EmbeddedObjectField(Field):
+	def __init__(self, object_type=None, *args, **kwargs):
+		super().__init__(*args, **kwargs)
+		self.object_type = object_type
+	
+	def serialise(self, value):
+		return value.serialise_and_wrap(self.object_type)
+	
+	def deserialise(self, value):
+		return EosObject.deserialise_and_unwrap(value, self.object_type)
+
+class ListField(Field):
+	def __init__(self, element_field=None, *args, **kwargs):
+		super().__init__(default=[], *args, **kwargs)
+		self.element_field = element_field
+	
+	def serialise(self, value):
+		return [self.element_field.serialise(x) for x in value]
+	
+	def deserialise(self, value):
+		return [self.element_field.deserialise(x) for x in value]
+
+EmbeddedObjectListField = ListField
+
+class UUIDField(Field):
+	def __init__(self, *args, **kwargs):
+		super().__init__(default=uuid.uuid4, *args, **kwargs)
+	
+	def serialise(self, value):
+		return str(uuid.uuid4)
+	
+	def unserialise(self, value):
+		return uuid.uuid4(value)
+
+# Objects
+# =======
 
 class EosObjectType(type):
-	def before_new(meta, name, bases, attrs):
+	def __new__(meta, name, bases, attrs):
+		#meta, name, bases, attrs = meta.before_new(meta, name, bases, attrs)
+		cls = type.__new__(meta, name, bases, attrs)
+		
 		# Process fields
-		fields = {}
-		for attr, val in attrs.items():
+		fields = cls._fields if hasattr(cls, '_fields') else {}
+		for attr in list(dir(cls)):
+			val = getattr(cls, attr)
 			if isinstance(val, Field):
 				fields[attr] = val
-				attrs[attr] = val.to_python()
-		attrs['_fields'] = fields
+				delattr(cls, attr)
+		cls._fields = fields
 		
-		return meta, name, bases, attrs
+		cls._name = cls.__module__ + '.' + cls.__qualname__
+		
+		return cls
 
-class TopLevelObjectType(mongoengine.base.TopLevelDocumentMetaclass, EosObjectType):
-	def __new__(meta, name, bases, attrs):
-		meta, name, bases, attrs = meta.before_new(meta, name, bases, attrs)
-		return super().__new__(meta, name, bases, attrs)
+class EosObject(metaclass=EosObjectType):
+	def __init__(self, *args, **kwargs):
+		for attr, val in self._fields.items():
+			setattr(self, attr, kwargs.get(attr, val.default))
 
-class EmbeddedObjectType(mongoengine.base.DocumentMetaclass, EosObjectType):
-	def __new__(meta, name, bases, attrs):
-		meta, name, bases, attrs = meta.before_new(meta, name, bases, attrs)
-		return super().__new__(meta, name, bases, attrs)
-
-class EosObject():
-	pass
-
-class DocumentObject(EosObject):
-	pass
-
-class TopLevelObject(DocumentObject, mongoengine.Document, metaclass=TopLevelObjectType):
-	meta = {
-		'abstract': True
-	}
-
-class EmbeddedObject(DocumentObject, mongoengine.EmbeddedDocument, metaclass=EmbeddedObjectType):
-	meta = {
-		'abstract': True
-	}
+TopLevelObject = EosObject
+EmbeddedObject = EosObject

eos/core/tests.py

@@ -36,18 +36,3 @@ class PyTestCase(TestCase):
 		self.assertEqual(person2.address, 'Address 2')
 		self.assertEqual(person1.say_hi(), 'Hello! My name is John')
 		self.assertEqual(person2.say_hi(), 'Hello! My name is James')
-	
-	#def test_default_py(self):
-	#	try:
-	#		person1 = self.Person() # No name
-	#		self.fail()
-	#	except KeyError:
-	#		pass
-	#	
-	#	try:
-	#		person1 = self.Person(address='Address') # No name
-	#		self.fail()
-	#	except KeyError:
-	#		pass
-	#	
-	#	person1 = self.Person(name='John')

requirements.txt

@@ -0,0 +1,4 @@
+mypy==0.521
+pymongo==3.5.1
+Transcrypt==3.6.50
+typed-ast==1.0.4