--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/entities/sources.py	Mon Feb 07 18:19:36 2011 +0100
@@ -0,0 +1,125 @@
+# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb 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 Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""data source related entities"""
+
+__docformat__ = "restructuredtext en"
+
+import re
+from socket import gethostname
+
+from logilab.common.textutils import text_to_dict
+from logilab.common.configuration import OptionError
+
+from cubicweb import ValidationError
+from cubicweb.entities import AnyEntity, fetch_config
+
+class _CWSourceCfgMixIn(object):
+    @property
+    def dictconfig(self):
+        return self.config and text_to_dict(self.config) or {}
+
+    def update_config(self, skip_unknown=False, **config):
+        from cubicweb.server import SOURCE_TYPES
+        from cubicweb.server.serverconfig import (SourceConfiguration,
+                                                  generate_source_config)
+        cfg = self.dictconfig
+        cfg.update(config)
+        options = SOURCE_TYPES[self.type].options
+        sconfig = SourceConfiguration(self._cw.vreg.config, options=options)
+        for opt, val in cfg.iteritems():
+            try:
+                sconfig.set_option(opt, val)
+            except OptionError:
+                if skip_unknown:
+                    continue
+                raise
+        cfgstr = unicode(generate_source_config(sconfig), self._cw.encoding)
+        self.set_attributes(config=cfgstr)
+
+
+class CWSource(_CWSourceCfgMixIn, AnyEntity):
+    __regid__ = 'CWSource'
+    fetch_attrs, fetch_order = fetch_config(['name', 'type'])
+
+    @property
+    def host_config(self):
+        dictconfig = self.dictconfig
+        host = gethostname()
+        for hostcfg in self.host_configs:
+            if hostcfg.match(host):
+                self.info('matching host config %s for source %s',
+                          hostcfg.match_host, self.name)
+                dictconfig.update(hostcfg.dictconfig)
+        return dictconfig
+
+    @property
+    def host_configs(self):
+        return self.reverse_cw_host_config_of
+
+    def init_mapping(self, mapping):
+        for key, options in mapping:
+            if isinstance(key, tuple): # relation definition
+                assert len(key) == 3
+                restrictions = ['X relation_type RT, RT name %(rt)s']
+                kwargs = {'rt': key[1]}
+                if key[0] != '*':
+                    restrictions.append('X from_entity FT, FT name %(ft)s')
+                    kwargs['ft'] = key[0]
+                if key[2] != '*':
+                    restrictions.append('X to_entity TT, TT name %(tt)s')
+                    kwargs['tt'] = key[2]
+                rql = 'Any X WHERE %s' % ','.join(restrictions)
+                schemarset = self._cw.execute(rql, kwargs)
+            elif key[0].isupper(): # entity type
+                schemarset = self._cw.execute('CWEType X WHERE X name %(et)s',
+                                              {'et': key})
+            else: # relation type
+                schemarset = self._cw.execute('CWRType X WHERE X name %(rt)s',
+                                              {'rt': key})
+            for schemaentity in schemarset.entities():
+                self._cw.create_entity('CWSourceSchemaConfig',
+                                       cw_for_source=self,
+                                       cw_schema=schemaentity,
+                                       options=options)
+
+
+class CWSourceHostConfig(_CWSourceCfgMixIn, AnyEntity):
+    __regid__ = 'CWSourceHostConfig'
+    fetch_attrs, fetch_order = fetch_config(['match_host', 'config'])
+
+    def match(self, hostname):
+        return re.match(self.match_host, hostname)
+
+
+class CWSourceSchemaConfig(AnyEntity):
+    __regid__ = 'CWSourceSchemaConfig'
+    fetch_attrs, fetch_order = fetch_config(['cw_for_source', 'cw_schema', 'options'])
+
+    def dc_title(self):
+        return self._cw._(self.__regid__) + ' #%s' % self.eid
+
+    @property
+    def schema(self):
+        return self.cw_schema[0]
+
+    @property
+    def source(self):
+        """repository only property, not available from the web side (eg
+        self._cw is expected to be a server session)
+        """
+        return self._cw.repo.sources_by_eid[self.cw_for_source[0].eid]