Validate budget input

sstreasury/jinja2/sstreasury/budget_edit.html

@@ -24,6 +24,18 @@
 	<h1>{% if request.resolver_match.url_name == 'budget_new' %}New{% else %}Edit{% endif %} budget</h1>
 	
 	<form class="ui form" method="POST">
+		{% if errors %}
+			<div class="ui visible error message">
+				<div class="header">Invalid input</div>
+				<p>Unable to save the budget. Please correct the issues below and try again:</p>
+				<ul>
+					{% for error in errors %}
+						<li>{{ error }}</li>
+					{% endfor %}
+				</ul>
+			</div>
+		{% endif %}
+		
 		<div class="ui disabled inline grid field">
 			<label class="three wide column">ID</label>
 			<input class="eleven wide column" type="text" name="id" value="{{ 'BU-{}'.format(revision.budget.id) if revision.budget.id != None else '' }}">
@@ -62,7 +74,7 @@
 			<div class="four wide column">Estimated no. of attendees</div>
 			<input class="seven wide column" type="text" name="event_attendees" value="{{ revision.event_attendees or '' }}">
 		</div>
-		<div class="ui required inline grid field">
+		<div class="ui inline grid field">
 			<label class="three wide column">Contributors <span data-tooltip="To share this budget with other contributors, enter their email addresses, one per line"><i class="grey question circle icon"></i></span></label>
 			<textarea class="eleven wide column" rows="2" name="contributors" style="font-family: Lato,'Helvetica Neue',Arial,Helvetica,sans-serif;">{{ contributors }}</textarea>
 		</div>
@@ -178,10 +190,6 @@
 		$('.ui.form').form({
 			on: 'blur',
 			keyboardShortcuts: false,
-			fields: {
-				name: 'empty',
-				contributors: 'empty'
-			},
 			onSuccess: function(event, fields) {
 				var revenue_data = [];
 				$('#revenue_grid .jsgrid-grid-body tr:not(.totalrow):not(.jsgrid-nodata-row)').each(function(i, el) {

sstreasury/views.py

@@ -16,7 +16,7 @@
 
 from django.contrib.auth.decorators import login_required
 from django.contrib.auth.models import User
-from django.core.exceptions import PermissionDenied
+from django.core.exceptions import PermissionDenied, ValidationError
 from django.core.validators import validate_email
 
 from django.conf import settings
@@ -32,6 +32,7 @@ from . import models
 from . import xero
 from ssmain.email import Emailer
 
+from datetime import datetime
 import functools
 import io
 import itertools
@@ -88,14 +89,58 @@ def claim_editable(viewfunc):
 
 # HELPER FUNCTIONS
 
+class FormValidationError(Exception):
+	def __init__(self, data, errors):
+		super().__init__(self)
+		self.data = data
+		self.errors = errors
+
 def revision_from_form(budget, revision, form):
+	errors = []
+	
 	revision.budget = budget
 	
+	if form['name']:
+		if len(form['name']) > 100:
+			errors.append('Title must be at most 100 characters')
 		revision.name = form['name']
-	revision.date = form['date'] if form['date'] else None
+	else:
+		errors.append('A title must be specified')
 	
-	revision.event_dt = form['event_dt'] if form['event_dt'] else None
+	if form['date']:
-	revision.event_attendees = form['event_attendees'] if form['event_attendees'] else None
+		try:
+			form_date = datetime.strptime(form['date'], '%Y-%m-%d')
+		except ValueError:
+			errors.append('Due date is not a valid date')
+		revision.date = form['date']
+	else:
+		errors.append('A due date must be specified')
+	
+	if form['event_dt']:
+		try:
+			form_event_dt = datetime.strptime(form['event_dt'], '%Y-%m-%d %H:%M')
+		except ValueError:
+			errors.append('Event date/time is not a valid date-time')
+		revision.event_dt = form['event_dt']
+	else:
+		revision.event_dt = None
+	
+	if form['event_attendees']:
+		if len(form['event_attendees']) > 20:
+			errors.append('Event attendees must be at most 20 characters')
+		revision.event_attendees = form['event_attendees']
+	else:
+		revision.event_attendees = None
+	
+	if form['contributors']:
+		contributors = form['contributors'].split('\n')
+		try:
+			for contributor in contributors:
+				validate_email(contributor.strip())
+		except ValidationError:
+			errors.append('Contributors contains invalid data – type only valid email addresses, one per line')
+	else:
+		contributors = []
 	
 	revision.comments = form['comments']
 	revision.revenue = json.loads(form['revenue'])
@@ -104,11 +149,11 @@ def revision_from_form(budget, revision, form):
 	revision.expense_comments = form['expense_comments']
 	revision.expense_no_emergency_fund = True if form.get('expense_no_emergency_fund', False) else False
 	
+	if errors:
+		raise FormValidationError(revision, errors)
+	
 	revision.save()
 	
-	contributors = form['contributors'].split('\n')
-	for contributor in contributors:
-		validate_email(contributor.strip())
 	for contributor in contributors:
 		try:
 			user = User.objects.get(email=contributor.strip())
@@ -227,6 +272,7 @@ def budget_print(request, budget, revision):
 @login_required
 def budget_new(request):
 	if request.method == 'POST':
+		try:
 			with transaction.atomic():
 				budget = models.Budget()
 				budget.save()
@@ -236,6 +282,12 @@ def budget_new(request):
 				revision.action = models.BudgetAction.CREATE.value
 				revision.state = models.BudgetState.DRAFT.value
 				revision = revision_from_form(budget, revision, request.POST)
+		except FormValidationError as form_error:
+			return render(request, 'sstreasury/budget_edit.html', {
+				'revision': form_error.data,
+				'contributors': request.POST['contributors'],
+				'errors': form_error.errors
+			})
 		
 		if request.POST['submit'] == 'Save':
 			return redirect(reverse('budget_view', kwargs={'id': budget.id}))
@@ -248,7 +300,8 @@ def budget_new(request):
 		
 		return render(request, 'sstreasury/budget_edit.html', {
 			'revision': revision,
-			'contributors': request.user.email
+			'contributors': request.user.email,
+			'errors': []
 		})
 
 @login_required
@@ -260,6 +313,7 @@ def budget_edit(request, budget, revision):
 			budget.delete()
 			return redirect(reverse('budget_list'))
 		
+		try:
 			with transaction.atomic():
 				new_revision = models.BudgetRevision()
 				new_revision.author = request.user
@@ -267,6 +321,12 @@ def budget_edit(request, budget, revision):
 				new_revision.action = models.BudgetAction.EDIT.value
 				new_revision.state = revision.state
 				new_revision = revision_from_form(budget, new_revision, request.POST)
+		except FormValidationError as form_error:
+			return render(request, 'sstreasury/budget_edit.html', {
+				'revision': form_error.data,
+				'contributors': request.POST['contributors'],
+				'errors': form_error.errors
+			})
 		
 		if request.POST['submit'] == 'Save':
 			return redirect(reverse('budget_view', kwargs={'id': budget.id}))
@@ -275,7 +335,8 @@ def budget_edit(request, budget, revision):
 	else:
 		return render(request, 'sstreasury/budget_edit.html', {
 			'revision': revision,
-			'contributors': '\n'.join(revision.contributors.all().values_list('email', flat=True))
+			'contributors': '\n'.join(revision.contributors.all().values_list('email', flat=True)),
+			'errors': []
 		})
 
 @login_required