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group.py
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group.py
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import genshi
import datetime
from sqlalchemy.orm import eagerload_all
from ckan.lib.base import BaseController, c, model, request, render, h
from ckan.lib.base import ValidationException, abort, gettext
from pylons.i18n import get_lang, _
import ckan.authz as authz
from ckan.authz import Authorizer
from ckan.lib.helpers import Page
from ckan.plugins import PluginImplementations, IGroupController, IGroupForm
from ckan.lib.navl.dictization_functions import DataError, unflatten, validate
from ckan.logic import NotFound, NotAuthorized, ValidationError
from ckan.logic import check_access, get_action
from ckan.logic.schema import group_form_schema
from ckan.logic import tuplize_dict, clean_dict, parse_params
import ckan.forms
# Mapping from group-type strings to IDatasetForm instances
_controller_behaviour_for = dict()
# The fallback behaviour
_default_controller_behaviour = None
def register_pluggable_behaviour(map):
"""
Register the various IGroupForm instances.
This method will setup the mappings between package types and the registered
IGroupForm instances. If it's called more than once an
exception will be raised.
"""
global _default_controller_behaviour
# Create the mappings and register the fallback behaviour if one is found.
for plugin in PluginImplementations(IGroupForm):
if plugin.is_fallback():
if _default_controller_behaviour is not None:
raise ValueError, "More than one fallback "\
"IGroupForm has been registered"
_default_controller_behaviour = plugin
for group_type in plugin.group_types():
# Create the routes based on group_type here, this will allow us to have top level
# objects that are actually Groups, but first we need to make sure we are not
# clobbering an existing domain
map.connect('%s_new' % (group_type,),
'/%s/new' % (group_type,), controller='group', action='new')
map.connect('%s_read' % (group_type,),
'/%s/{id}' % (group_type,), controller='group', action='read')
map.connect('%s_action' % (group_type,),
'/%s/{action}/{id}' % (group_type,), controller='group',
requirements=dict(action='|'.join(['edit', 'authz', 'history' ]))
)
if group_type in _controller_behaviour_for:
raise ValueError, "An existing IGroupForm is "\
"already associated with the package type "\
"'%s'" % group_type
_controller_behaviour_for[group_type] = plugin
# Setup the fallback behaviour if one hasn't been defined.
if _default_controller_behaviour is None:
_default_controller_behaviour = DefaultGroupForm()
def _lookup_plugin(group_type):
"""
Returns the plugin controller associoated with the given group type.
If the group type is None or cannot be found in the mapping, then the
fallback behaviour is used.
"""
if group_type is None:
return _default_controller_behaviour
return _controller_behaviour_for.get(group_type,
_default_controller_behaviour)
class DefaultGroupForm(object):
"""
Provides a default implementation of the pluggable Group controller behaviour.
This class has 2 purposes:
- it provides a base class for IGroupForm implementations
to use if only a subset of the method hooks need to be customised.
- it provides the fallback behaviour if no plugin is setup to provide
the fallback behaviour.
Note - this isn't a plugin implementation. This is deliberate, as
we don't want this being registered.
"""
def group_form(self):
return 'group/new_group_form.html'
def form_to_db_schema(self):
return group_form_schema()
def db_to_form_schema(self):
'''This is an interface to manipulate data from the database
into a format suitable for the form (optional)'''
def check_data_dict(self, data_dict):
'''Check if the return data is correct, mostly for checking out if
spammers are submitting only part of the form
# Resources might not exist yet (eg. Add Dataset)
surplus_keys_schema = ['__extras', '__junk', 'state', 'groups',
'extras_validation', 'save', 'return_to',
'resources']
schema_keys = package_form_schema().keys()
keys_in_schema = set(schema_keys) - set(surplus_keys_schema)
missing_keys = keys_in_schema - set(data_dict.keys())
if missing_keys:
#print data_dict
#print missing_keys
log.info('incorrect form fields posted')
raise DataError(data_dict)
'''
pass
def setup_template_variables(self, context, data_dict):
c.is_sysadmin = Authorizer().is_sysadmin(c.user)
## This is messy as auths take domain object not data_dict
context_group = context.get('group',None)
group = context_group or c.group
if group:
try:
if not context_group:
context['group'] = group
check_access('group_change_state',context)
c.auth_for_change_state = True
except NotAuthorized:
c.auth_for_change_state = False
############## End of pluggable group behaviour ##############
class GroupController(BaseController):
## hooks for subclasses
def _group_form(self, group_type=None):
return _lookup_plugin(group_type).group_form()
def _form_to_db_schema(self, group_type=None):
return _lookup_plugin(group_type).form_to_db_schema()
def _db_to_form_schema(self, group_type=None):
'''This is an interface to manipulate data from the database
into a format suitable for the form (optional)'''
return _lookup_plugin(group_type).form_to_db_schema()
def _setup_template_variables(self, context, data_dict, group_type=None):
return _lookup_plugin(group_type).setup_template_variables(context,data_dict)
## end hooks
def index(self):
context = {'model': model, 'session': model.Session,
'user': c.user or c.author}
data_dict = {'all_fields': True}
try:
check_access('site_read', context)
except NotAuthorized:
abort(401, _('Not authorized to see this page'))
results = get_action('group_list')(context, data_dict)
c.page = Page(
collection=results,
page=request.params.get('page', 1),
items_per_page=20
)
return render('group/index.html')
def read(self, id):
group_type = self._get_group_type(id.split('@')[0])
context = {'model': model, 'session': model.Session,
'user': c.user or c.author,
'schema': self._form_to_db_schema(group_type=type)}
data_dict = {'id': id}
try:
c.group_dict = get_action('group_show')(context, data_dict)
c.group = context['group']
except NotFound:
abort(404, _('Group not found'))
except NotAuthorized:
abort(401, _('Unauthorized to read group %s') % id)
try:
description_formatted = ckan.misc.MarkdownFormat().to_html(c.group.get('description',''))
c.description_formatted = genshi.HTML(description_formatted)
except Exception, e:
error_msg = "<span class='inline-warning'>%s</span>" % _("Cannot render description")
c.description_formatted = genshi.HTML(error_msg)
try:
desc_formatted = ckan.misc.MarkdownFormat().to_html(c.group.description)
desc_formatted = genshi.HTML(desc_formatted)
except genshi.ParseError, e:
desc_formatted = 'Error: Could not parse group description'
c.group_description_formatted = desc_formatted
c.group_admins = self.authorizer.get_admins(c.group)
results = get_action('group_package_show')(context, data_dict)
c.page = Page(
collection=results,
page=request.params.get('page', 1),
items_per_page=50
)
return render('group/read.html')
def new(self, data=None, errors=None, error_summary=None):
group_type = request.path.strip('/').split('/')[0]
if group_type == 'group':
group_type = None
if data:
data['type'] = group_type
context = {'model': model, 'session': model.Session,
'user': c.user or c.author, 'extras_as_string': True,
'schema': self._form_to_db_schema(),
'save': 'save' in request.params }
try:
check_access('group_create',context)
except NotAuthorized:
abort(401, _('Unauthorized to create a group'))
if context['save'] and not data:
return self._save_new(context, group_type)
data = data or {}
errors = errors or {}
error_summary = error_summary or {}
vars = {'data': data, 'errors': errors, 'error_summary': error_summary}
self._setup_template_variables(context,data)
c.form = render(self._group_form(group_type=group_type), extra_vars=vars)
return render('group/new.html')
def edit(self, id, data=None, errors=None, error_summary=None):
group_type = self._get_group_type(id.split('@')[0])
context = {'model': model, 'session': model.Session,
'user': c.user or c.author, 'extras_as_string': True,
'save': 'save' in request.params,
'schema': self._form_to_db_schema(group_type=group_type),
}
data_dict = {'id': id}
if context['save'] and not data:
return self._save_edit(id, context)
try:
old_data = get_action('group_show')(context, data_dict)
c.grouptitle = old_data.get('title')
c.groupname = old_data.get('name')
schema = self._db_to_form_schema()
if schema and not data:
old_data, errors = validate(old_data, schema, context=context)
data = data or old_data
except NotFound:
abort(404, _('Group not found'))
except NotAuthorized:
abort(401, _('Unauthorized to read group %s') % '')
group = context.get("group")
c.group = group
try:
check_access('group_update',context)
except NotAuthorized, e:
abort(401, _('User %r not authorized to edit %s') % (c.user, id))
errors = errors or {}
vars = {'data': data, 'errors': errors, 'error_summary': error_summary}
self._setup_template_variables(context, data, group_type=group_type)
c.form = render(self._group_form(group_type), extra_vars=vars)
return render('group/edit.html')
def _get_group_type(self, id):
"""
Given the id of a group it determines the plugin to load
based on the group's type name (type). The plugin found
will be returned, or None if there is no plugin associated with
the type.
Uses a minimal context to do so. The main use of this method
is for figuring out which plugin to delegate to.
aborts if an exception is raised.
"""
global _controller_behaviour_for
context = {'model': model, 'session': model.Session,
'user': c.user or c.author}
try:
data = get_action('group_show')(context, {'id': id})
except NotFound:
abort(404, _('Group not found'))
except NotAuthorized:
abort(401, _('Unauthorized to read group %s') % id)
return data['type']
def _save_new(self, context, group_type=None):
try:
data_dict = clean_dict(unflatten(
tuplize_dict(parse_params(request.params))))
data_dict['type'] = group_type or 'dataset_group'
context['message'] = data_dict.get('log_message', '')
group = get_action('group_create')(context, data_dict)
# Redirect to the appropriate _read route for the type of group
h.redirect_to( group['type'] + '_read', id=group['name'])
except NotAuthorized:
abort(401, _('Unauthorized to read group %s') % '')
except NotFound, e:
abort(404, _('Package not found'))
except DataError:
abort(400, _(u'Integrity Error'))
except ValidationError, e:
errors = e.error_dict
error_summary = e.error_summary
return self.new(data_dict, errors, error_summary)
def _save_edit(self, id, context):
try:
data_dict = clean_dict(unflatten(
tuplize_dict(parse_params(request.params))))
context['message'] = data_dict.get('log_message', '')
data_dict['id'] = id
group = get_action('group_update')(context, data_dict)
h.redirect_to(controller='group', action='read', id=group['name'])
except NotAuthorized:
abort(401, _('Unauthorized to read group %s') % id)
except NotFound, e:
abort(404, _('Package not found'))
except DataError:
abort(400, _(u'Integrity Error'))
except ValidationError, e:
errors = e.error_dict
error_summary = e.error_summary
return self.edit(id, data_dict, errors, error_summary)
def authz(self, id):
group = model.Group.get(id)
if group is None:
abort(404, _('Group not found'))
c.groupname = group.name
c.grouptitle = group.display_name
try:
context = {'model':model,'user':c.user or c.author, 'group':group}
check_access('group_edit_permissions',context)
c.authz_editable = True
c.group = context['group']
except NotAuthorized:
c.authz_editable = False
if not c.authz_editable:
abort(401, gettext('User %r not authorized to edit %s authorizations') % (c.user, id))
current_uors = self._get_userobjectroles(id)
self._handle_update_of_authz(current_uors, group)
# get the roles again as may have changed
user_object_roles = self._get_userobjectroles(id)
self._prepare_authz_info_for_render(user_object_roles)
return render('group/authz.html')
def _get_userobjectroles(self, group_id):
group = model.Group.get(group_id)
uors = model.Session.query(model.GroupRole).join('group').filter_by(name=group.name).all()
return uors
def history(self, id):
if 'diff' in request.params or 'selected1' in request.params:
try:
params = {'id':request.params.getone('group_name'),
'diff':request.params.getone('selected1'),
'oldid':request.params.getone('selected2'),
}
except KeyError, e:
if dict(request.params).has_key('group_name'):
id = request.params.getone('group_name')
c.error = _('Select two revisions before doing the comparison.')
else:
params['diff_entity'] = 'group'
h.redirect_to(controller='revision', action='diff', **params)
context = {'model': model, 'session': model.Session,
'user': c.user or c.author,
'schema': self._form_to_db_schema()}
data_dict = {'id': id}
try:
c.group_dict = get_action('group_show')(context, data_dict)
c.group_revisions = get_action('group_revision_list')(context, data_dict)
#TODO: remove
# Still necessary for the authz check in group/layout.html
c.group = context['group']
except NotFound:
abort(404, _('Group not found'))
except NotAuthorized:
abort(401, _('User %r not authorized to edit %r') % (c.user, id))
format = request.params.get('format', '')
if format == 'atom':
# Generate and return Atom 1.0 document.
from webhelpers.feedgenerator import Atom1Feed
feed = Atom1Feed(
title=_(u'CKAN Group Revision History'),
link=h.url_for(controller='group', action='read', id=c.group_dict['name']),
description=_(u'Recent changes to CKAN Group: ') +
c.group_dict['display_name'],
language=unicode(get_lang()),
)
for revision_dict in c.group_revisions:
revision_date = h.date_str_to_datetime(revision_dict['timestamp'])
try:
dayHorizon = int(request.params.get('days'))
except:
dayHorizon = 30
dayAge = (datetime.datetime.now() - revision_date).days
if dayAge >= dayHorizon:
break
if revision_dict['message']:
item_title = u'%s' % revision_dict['message'].split('\n')[0]
else:
item_title = u'%s' % revision_dict['id']
item_link = h.url_for(controller='revision', action='read', id=revision_dict['id'])
item_description = _('Log message: ')
item_description += '%s' % (revision_dict['message'] or '')
item_author_name = revision_dict['author']
item_pubdate = revision_date
feed.add_item(
title=item_title,
link=item_link,
description=item_description,
author_name=item_author_name,
pubdate=item_pubdate,
)
feed.content_type = 'application/atom+xml'
return feed.writeString('utf-8')
return render('group/history.html')
def _render_edit_form(self, fs):
# errors arrive in c.error and fs.errors
c.fieldset = fs
c.fieldset2 = ckan.forms.get_package_group_fieldset()
return render('group/edit_form.html')
def _update(self, fs, group_name, group_id):
'''
Writes the POST data (associated with a group edit) to the database
@input c.error
'''
validation = fs.validate()
if not validation:
c.form = self._render_edit_form(fs)
raise ValidationException(fs)
try:
fs.sync()
except Exception, inst:
model.Session.rollback()
raise
else:
model.Session.commit()
def _update_authz(self, fs):
validation = fs.validate()
if not validation:
c.form = self._render_edit_form(fs)
raise ValidationException(fs)
try:
fs.sync()
except Exception, inst:
model.Session.rollback()
raise
else:
model.Session.commit()