wcs: add combo/wcs/formdef integration (#6227)

combo/apps/wcs/README

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+Combo/wcs integration
+=====================
+
+INSTALLED_APPS += ('combo.apps.wcs',)
+
+COMBO_WCS_SITES = {
+        'default': {'title': 'wcs', 'url': 'http://wcs/'},
+}

combo/apps/wcs/forms.py

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+# combo - content management system
+# Copyright (C) 2014-2015  Entr'ouvert
+#
+# 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 django import forms
+from django.conf import settings
+
+from .models import WcsFormCell
+
+class WcsFormCellForm(forms.ModelForm):
+    class Meta:
+        model = WcsFormCell
+        fields = ('formdef_reference',)
+
+    def __init__(self, *args, **kwargs):
+        super(WcsFormCellForm, self).__init__(*args, **kwargs)
+        formdef_references = []
+        for wcs_key in settings.COMBO_WCS_SITES:
+            wcs_site = settings.COMBO_WCS_SITES.get(wcs_key)
+            site_title = wcs_site.get('site_title')
+            forms_response_json = WcsFormCell.get_wcs_json(wcs_site.get('url') + 'json')
+            for form in forms_response_json:
+                slug = form.get('slug')
+                title = form.get('title')
+                if len(settings.COMBO_WCS_SITES) == 1:
+                    label = title
+                else:
+                    label = '%s : %s' % (site_title, title)
+                reference = '%s:%s' % (wcs_key, slug)
+                formdef_references.append((reference, label))
+        formdef_references.sort(lambda x, y: cmp(x[1], y[1]))
+
+        self.fields['formdef_reference'].widget = forms.Select(choices=formdef_references)

combo/apps/wcs/models.py

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+# combo - content management system
+# Copyright (C) 2014-2015  Entr'ouvert
+#
+# 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/>.
+
+import requests
+
+from django import template
+from django.conf import settings
+from django.core.cache import cache
+from django.db import models
+from django.utils.translation import ugettext_lazy as _
+
+from combo.data.models import CellBase
+from combo.data.library import register_cell_class
+
+@register_cell_class
+class WcsFormCell(CellBase):
+    formdef_reference = models.CharField(_('Form'), max_length=100)
+
+    cached_title = models.CharField(_('Title'), max_length=50)
+    cached_url = models.URLField(_('URL'))
+
+    class Meta:
+        verbose_name = _('Form')
+
+    def get_default_form_class(self):
+        from .forms import WcsFormCellForm
+        return WcsFormCellForm
+
+    def save(self, *args, **kwargs):
+        if self.formdef_reference:
+            wcs_key, form_slug = self.formdef_reference.split(':')
+            wcs_site = settings.COMBO_WCS_SITES.get(wcs_key)
+            forms_response_json = self.get_wcs_json(wcs_site.get('url') + 'json')
+            for form in forms_response_json:
+                slug = form.get('slug')
+                if slug == form_slug:
+                    self.cached_title = form.get('title')
+                    self.cached_url = form.get('url')
+        return super(WcsFormCell, self).save(*args, **kwargs)
+
+    def render(self, context):
+        formdef_template = template.loader.get_template('combo/wcs/form.html')
+        context['slug'] = self.formdef_reference.split(':')[-1]
+        context['title'] = self.cached_title
+        context['url'] = self.cached_url
+        return formdef_template.render(context)
+
+    @classmethod
+    def get_wcs_json(cls, url):
+        response_json = cache.get(url)
+        if response_json is None:
+            response_json = requests.get(url).json()
+            cache.set(url, response_json)
+        return response_json

combo/apps/wcs/templates/combo/wcs/form.html

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+<div class="wcs-form-{{slug}}"><a href="{{ url }}">{{ title }}</a></div>