validate value counts in metadata + fix multiple values

[redakcja.git] / apps / wiki / forms.py

diff --git a/apps/wiki/forms.py b/apps/wiki/forms.py
index 7ef02e1..df6bf85 100644 (file)
--- a/apps/wiki/forms.py
+++ b/apps/wiki/forms.py
@@ -4,9 +4,13 @@
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django import forms
+from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext_lazy as _
 
 from catalogue.constants import STAGES
+from catalogue.models import Category
+from catalogue.models.document import metadata_from_text
+from librarian.document import Document
 
 
 class DocumentTextSaveForm(forms.Form):
@@ -42,7 +46,7 @@ class DocumentTextSaveForm(forms.Form):
     )
 
     stage = forms.ChoiceField(
-        choices=[(s, s) for s in STAGES],
+        choices=STAGES,
         required=False,
         label=_(u"Stage"),
         help_text=_(u"If completed a work stage, change to another one."),
@@ -55,6 +59,46 @@ class DocumentTextSaveForm(forms.Form):
             self.fields['author_name'].required = False
             self.fields['author_email'].required = False
 
+    def clean_text(self):
+        text = self.cleaned_data['text']
+        try:
+            doc = Document.from_string(text)
+        except ValueError as e:
+            raise ValidationError(e.message)
+
+        from librarian import SSTNS, DCNS
+        root_elem = doc.edoc.getroot()
+        if len(root_elem) < 1 or root_elem[0].tag != SSTNS('metadata'):
+            raise ValidationError("The first tag in section should be metadata")
+        if len(root_elem) < 2 or root_elem[1].tag != SSTNS('header'):
+            raise ValidationError("The first tag after metadata should be header")
+        header = root_elem[1]
+        if not getattr(header, 'text', None) or not header.text.strip():
+            raise ValidationError(
+                "The first header should contain the title in plain text (no links, emphasis etc.) and cannot be empty")
+
+        cover_url = doc.meta.get_one(DCNS('relation.coverimage.url'))
+        if cover_url:
+            ext = cover_url.rsplit('.', 1)[-1].lower()
+            if ext not in ('jpg', 'jpeg', 'png', 'gif', 'svg'):
+                raise ValidationError('Invalid cover image format, should be an image file (jpg, png, gif, svg). '
+                                      'Change it in Metadata.')
+        metadata = metadata_from_text(text)
+        if 'multiple_values' in metadata:
+            raise ValidationError('Category "%s" does not allow multiple values.' % metadata['multiple_values'])
+        for category in Category.objects.all():
+            values = metadata.get(category.dc_tag)
+            if values is None:
+                continue
+            if not category.multiple:
+                values = [values]
+            if not values:
+                values = []
+            for value in values:
+                if not category.tag_set.filter(dc_value=value):
+                    raise ValidationError('Invalid value for dc:%s: %s' % (category.dc_tag, value))
+        return text
+
 
 class DocumentTextRevertForm(forms.Form):
     """