Implement pre-poll voting

eos/base/election.py

@@ -47,10 +47,11 @@ class Ballot(EmbeddedObject):
 		return Ballot(encrypted_answers=encrypted_answers_deaudit, election_id=self.election_id, election_hash=self.election_hash)
 
 class Vote(EmbeddedObject):
-	_ver = StringField(default='0.4')
+	_ver = StringField(default='0.5')
 	
 	ballot = EmbeddedObjectField()
 	cast_at = DateTimeField()
+	comment = StringField()
 	
 	cast_ip = StringField(is_protected=True)
 	cast_fingerprint = BlobField(is_protected=True)

eosweb/core/static/nunjucks/booth/cast_prepoll.html

@@ -0,0 +1,41 @@
+{% extends templates['booth/base.html'] %}
+
+{#
+	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/>.
+#}
+
+{% block content %}
+	<p>Your vote has <span class="superem">not</span> yet been cast.</p>
+	
+	<div class="ui negative message">
+		<p>Your vote has <span class="superem">not</span> yet been cast. Please follow the instructions to continue.</p>
+	</div>
+	
+	<p>If you have not already done so, please make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>. Please retain a copy of your ballot fingerprint – you can use it to verify that your vote has been counted correctly. You may <a href="#" onclick="window.print();return false;">print this page</a> as a receipt if you wish.</p>
+	
+	<p>To continue, copy and paste the ballot below and provide it to the election administrator.</p>
+	
+	<div class="ui form">
+		{# For some reason nunjucks doesn't like calling this the normal way #}
+		{% set ballot_deaudit = ballot.deaudit() %}
+		<textarea>{{ ballot_deaudit.to_json(ballot_deaudit.serialise_and_wrap(ballot_deaudit)) }}</textarea>
+	</div>
+{% endblock %}
+
+{% block buttons %}
+	<button class="ui left floated button" onclick="prevTemplate();">Back</a>
+{% endblock %}

eosweb/core/static/nunjucks/booth/review_prepoll.html

@@ -0,0 +1,45 @@
+{% extends templates['booth/base.html'] %}
+
+{#
+	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/>.
+#}
+
+{% block content %}
+	<p>Your vote has <span class="superem">not</span> yet been cast. Your selections are shown below. Please review your selections and ensure you are happy with them before continuing.</p>
+	
+	<div class="ui negative message">
+		<p>Your vote has <span class="superem">not</span> yet been cast. Please follow the instructions to continue.</p>
+	</div>
+	
+	{% for question in election.questions.impl %}
+		<h2>{{ loop.index }}. {{ question.prompt }}</h2>
+		{% include templates[selection_model_view_map[election.questions.__getitem__(loop.index0)._name]["selections_review"]] %}
+	{% endfor %}
+	
+	<p>If you are happy with your selections, then make a note of your ballot fingerprint, <span class="hash">{{ eosjs.eos.core.hashing.__all__.SHA256().update_obj(ballot).hash_as_b64() }}</span>.</p>
+	<p>Click ‘Continue’, and you will be able to copy your pre-poll ballot to provide to the election administrator.</p>
+{% endblock %}
+
+{% block buttons %}
+	<button class="ui left floated button" onclick="prevTemplate();">Back</button>
+	<button class="ui right floated primary button" onclick="nextTemplate(2);">Continue</button>
+{% endblock %}
+
+{% block after %}
+	<div style="clear: both; margin-bottom: 1em;"></div>
+	<p><small>If you would like to audit your ballot, <a href="#" onclick="nextTemplate(1);">click here</a>. Auditing your ballot is an <b>optional</b> step you can take to check that your vote has been prepared correctly. You do not need to audit your ballot in order to cast a vote.</small></p>
+{% endblock %}

eosweb/core/templates/election/view/booth.html

@@ -214,6 +214,29 @@
 			}
 		});
 		templates['booth/encrypt.html'] = null;
+		
+		if (location.search.indexOf('?prepoll') >= 0) {
+			// Pre-poll
+			boothTasks.append({
+				activate: function(fromLeft) {
+					showTemplate('booth/review_prepoll.html', {ballot: booth.ballot});
+				}
+			});
+			templates['booth/review_prepoll.html'] = null;
+			boothTasks.append({
+				activate: function(fromLeft) {
+					showTemplate('booth/audit.html', {ballot: booth.ballot});
+				}
+			});
+			templates['booth/audit.html'] = null;
+			boothTasks.append({
+				activate: function(fromLeft) {
+					showTemplate('booth/cast_prepoll.html', {ballot: booth.ballot});
+				}
+			});
+			templates['booth/cast_prepoll.html'] = null;
+		} else {
+			// Real voting booth
 			boothTasks.append({
 				activate: function(fromLeft) {
 					showTemplate('booth/review.html', {ballot: booth.ballot});
@@ -238,6 +261,7 @@
 				}
 			});
 			templates['booth/complete.html'] = null;
+		}
 		
 		// === END BOOTH TASKS ===
 		

eosweb/core/templates/election/view/view.html

@@ -76,6 +76,8 @@
 		<h2>Voting booth</h2>
 		
 		<p>Voting in this {{ election.kind }} has not yet begun. If you would like to preview the voting booth, <a href="{{ url_for('election_booth', election_id=election._id) }}">click here</a>. Note that you will not be able to cast any ballots until voting opens.</p>
+		
+		<p><small>If you are a registered pre-poll voter, you may access the pre-poll voting booth <a href="{{ url_for('election_booth', election_id=election._id) }}?prepoll">here</a>.</small></p>
 	{% elif election.workflow.get_task('eos.base.workflow.TaskCloseVoting').status == Status.EXITED %}
 		<h2>Voting booth</h2>