renamed BackendsLoader to ModulesLoader

weboob/core/backendscfg.py

@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2010  Romain Bignon
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 3 of the License.
+#
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+from __future__ import with_statement
+
+import stat
+import os
+from ConfigParser import RawConfigParser
+from logging import warning
+
+__all__ = ['BackendsConfig']
+
+
+class BackendsConfig(object):
+    class WrongPermissions(Exception):
+        pass
+
+    def __init__(self, confpath):
+        self.confpath = confpath
+        try:
+            mode = os.stat(confpath).st_mode
+        except OSError:
+            os.mknod(confpath, 0600)
+        else:
+            if mode & stat.S_IRGRP or mode & stat.S_IROTH:
+                raise self.WrongPermissions(
+                    u'Weboob will not start until config file %s is readable by group or other users.' % confpath)
+
+    def iter_backends(self):
+        config = RawConfigParser()
+        config.read(self.confpath)
+        for instance_name in config.sections():
+            params = dict(config.items(instance_name))
+            try:
+                backend_name = params.pop('_backend')
+            except KeyError:
+                try:
+                    backend_name = params.pop('_type')
+                    warning(u'Please replace _type with _backend in your config file "%s", for backend "%s"' % (
+                        self.confpath, backend_name))
+                except KeyError:
+                    warning('Missing field "_backend" for configured backend "%s"', instance_name)
+                    continue
+            yield instance_name, backend_name, params
+
+    def add_backend(self, instance_name, backend_name, params, edit=False):
+        if not instance_name:
+            raise ValueError(u'Please give a name to the configured backend.')
+        config = RawConfigParser()
+        config.read(self.confpath)
+        if not edit:
+            config.add_section(instance_name)
+        config.set(instance_name, '_backend', backend_name)
+        for key, value in params.iteritems():
+            config.set(instance_name, key, value)
+        with open(self.confpath, 'wb') as f:
+            config.write(f)
+
+    def edit_backend(self, instance_name, backend_name, params):
+        return self.add_backend(instance_name, backend_name, params, True)
+
+    def get_backend(self, instance_name):
+        config = RawConfigParser()
+        config.read(self.confpath)
+        if not config.has_section(instance_name):
+            raise KeyError(u'Configured backend "%s" not found' % instance_name)
+
+        items = dict(config.items(instance_name))
+
+        try:
+            backend_name = items.pop('_backend')
+        except KeyError:
+            try:
+                backend_name = items.pop('_type')
+                warning(u'Please replace _type with _backend in your config file "%s"' % self.confpath)
+            except KeyError:
+                warning('Missing field "_backend" for configured backend "%s"', instance_name)
+                raise KeyError(u'Configured backend "%s" not found' % instance_name)
+        return backend_name, items
+
+    def remove_backend(self, instance_name):
+        config = RawConfigParser()
+        config.read(self.confpath)
+        config.remove_section(instance_name)
+        with open(self.confpath, 'w') as f:
+            config.write(f)
+
+