Merge pull request #1307 from akvo/1265_donations

[#1265] Donations

.gitignore

@@ -117,3 +117,5 @@ tramp
 # SASS
 akvo/rsr/static/rsr/v3/css/src/.sass-cache
 akvo/rsr/static/rsr/v3/css/src/*.map
+
+*.codekit

akvo/rsr/forms.py

@@ -12,13 +12,16 @@
 from django.contrib.auth import get_user_model
 from django.contrib.auth.forms import PasswordChangeForm
 from django.contrib.sites.models import get_current_site
+from django.db.models import get_model
 from django.utils.translation import ugettext_lazy as _
 
+from mollie.ideal.utils import get_mollie_banklist
+
 from registration.models import RegistrationProfile
 
 from urlparse import urlsplit, urlunsplit
 
-from .models import Country, Organisation, ProjectUpdate, ProjectUpdateLocation
+from .models import Country, Invoice, Organisation, ProjectUpdate, ProjectUpdateLocation
 
 from akvo import settings
 
@@ -318,3 +321,50 @@ class UserAvatarForm(forms.ModelForm):
     class Meta:
         model = get_user_model()
         fields = ('avatar',)
+
+
+class InvoiceForm(forms.ModelForm):
+    def __init__(self, project, engine, *args, **kwargs):
+        super(InvoiceForm, self).__init__(*args, **kwargs)
+        self.project = project
+        self.engine = engine
+        if engine == 'ideal':
+            self.fields['bank'] = forms.CharField(max_length=4,
+                widget=forms.Select(choices=get_mollie_banklist()))
+
+    """HACK:
+    Ideally the name and email fields in the Invoice model
+    should be required. They are not because of the original (legacy)
+    design of the Invoice model.
+    The fields below *override* the model to ensure data consistency.
+    """
+    amount = forms.IntegerField(min_value=2)
+    name = forms.CharField(label="Full name")
+    email = forms.EmailField(label="Email address")
+    email2 = forms.EmailField(label="Email address (repeat)")
+    campaign_code = forms.CharField(required=False, label="Campaign code (optional)")
+    is_public = forms.BooleanField(required=False, label="List name next to donation")
+
+    class Meta:
+        model = get_model('rsr', 'invoice')
+        fields = ('amount', 'name', 'email', 'email2',
+                  'campaign_code', 'is_public')
+
+    def over_donated(self):
+        donation = self.cleaned_data.get('amount', 0)
+        if self.engine == Invoice.PAYMENT_ENGINE_PAYPAL:
+            if self.project.amount_needed_to_fully_fund_via_paypal() < donation:
+                return True
+        else:
+            if self.project.amount_needed_to_fully_fund_via_ideal() < donation:
+                return True
+        return False
+
+    def clean(self):
+        if self.over_donated():
+            raise forms.ValidationError(_('You cannot donate more than the project actually needs!'))
+        cd = self.cleaned_data
+        if 'email' in cd and 'email2' in cd:
+            if cd['email'] != cd['email2']:
+                raise forms.ValidationError(_('You must type the same email address each time!'))
+        return cd