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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# 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; either version 2 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 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import logging
import gobject
import simplejson
from sugar.bundle.activitybundle import ActivityBundle
from sugar.bundle.bundle import MalformedBundleException
from sugar import env
import config
class BundleRegistry(gobject.GObject):
"""Service that tracks the available activity bundles"""
__gsignals__ = {
'bundle-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'bundle-removed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'bundle-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self):
gobject.GObject.__init__(self)
self._mime_defaults = self._load_mime_defaults()
self._bundles = []
for activity_dir in self._get_activity_directories():
self._scan_directory(activity_dir)
self._last_defaults_mtime = -1
self._favorite_bundles = self._load_favorites()
self._merge_default_favorites()
def _get_activity_directories(self):
directories = []
if os.environ.has_key('SUGAR_ACTIVITIES'):
directories.extend(os.environ['SUGAR_ACTIVITIES'].split(':'))
directories.append(env.get_user_activities_path())
return directories
def _load_mime_defaults(self):
defaults = {}
f = open(os.path.join(config.data_path, 'mime.defaults'), 'r')
for line in f.readlines():
line = line.strip()
if line and not line.startswith('#'):
mime = line[:line.find(' ')]
handler = line[line.rfind(' ') + 1:]
defaults[mime] = handler
f.close()
return defaults
def _load_favorites(self):
favorite_bundles = []
favorites_path = env.get_profile_path('favorite_activities')
if os.path.exists(favorites_path):
try:
favorites_data = simplejson.load(open(favorites_path))
except ValueError, e:
logging.error('Error while loading favorite_activities: %r.' %
e)
else:
# Old structure used to be a list, instead of a dictionary.
if isinstance(favorites_data, list):
favorite_bundles = favorites_data
else:
favorite_bundles = favorites_data['favorites']
self._last_defaults_mtime = favorites_data['defaults-mtime']
return favorite_bundles
def _merge_default_favorites(self):
default_activities = []
defaults_path = os.path.join(config.data_path, 'activities.defaults')
if os.path.exists(defaults_path):
file_mtime = os.stat(defaults_path).st_mtime
if file_mtime > self._last_defaults_mtime:
f = open(defaults_path, 'r')
for line in f.readlines():
line = line.strip()
if line and not line.startswith('#'):
default_activities.append(line)
f.close()
self._last_defaults_mtime = file_mtime
if not default_activities:
return
for bundle_id in default_activities:
max_version = -1
for bundle in self._bundles:
if bundle.get_bundle_id() == bundle_id and \
max_version < bundle.get_activity_version():
max_version = bundle.get_activity_version()
if max_version > -1 and \
(bundle_id, max_version) not in self._favorite_bundles:
self._favorite_bundles.append([bundle_id, max_version])
logging.debug('After merging: %r' % self._favorite_bundles)
self._write_favorites_file()
def get_bundle(self, bundle_id):
"""Returns an bundle given his service name"""
for bundle in self._bundles:
if bundle.get_bundle_id() == bundle_id:
return bundle
return None
def __iter__(self):
return self._bundles.__iter__()
def _scan_directory(self, path):
if not os.path.isdir(path):
return
# Sort by mtime to ensure a stable activity order
bundles = {}
for f in os.listdir(path):
if not f.endswith('.activity'):
continue
try:
bundle_dir = os.path.join(path, f)
if os.path.isdir(bundle_dir):
bundles[bundle_dir] = os.stat(bundle_dir).st_mtime
except Exception, e:
logging.error('Error while processing installed activity ' \
'bundle: %s, %s, %s' % (f, e.__class__, e))
bundle_dirs = bundles.keys()
bundle_dirs.sort(lambda d1, d2: cmp(bundles[d1], bundles[d2]))
for folder in bundle_dirs:
try:
self.add_bundle(folder)
except Exception, e:
logging.error('Error while processing installed activity ' \
'bundle: %s, %s, %s' % (folder, e.__class__, e))
def add_bundle(self, bundle_path):
try:
bundle = ActivityBundle(bundle_path)
except MalformedBundleException:
return False
self._bundles.append(bundle)
self.emit('bundle-added', bundle)
return True
def remove_bundle(self, bundle_path):
for bundle in self._bundles:
if bundle.get_path() == bundle_path:
self._bundles.remove(bundle)
self.emit('bundle-removed', bundle)
return True
return False
def get_activities_for_type(self, mime_type):
result = []
for bundle in self._bundles:
if bundle.get_mime_types() and mime_type in bundle.get_mime_types():
if self.get_default_for_type(mime_type) == \
bundle.get_bundle_id():
result.insert(0, bundle)
else:
result.append(bundle)
return result
def get_default_for_type(self, mime_type):
if self._mime_defaults.has_key(mime_type):
return self._mime_defaults[mime_type]
else:
return None
def _find_bundle(self, bundle_id, version):
for bundle in self._bundles:
if bundle.get_bundle_id() == bundle_id and \
bundle.get_activity_version() == version:
return bundle
raise ValueError('No bundle %r with version %r exists.' % \
(bundle_id, version))
def set_bundle_favorite(self, bundle_id, version, favorite):
bundle = self._find_bundle(bundle_id, version)
if favorite and not [bundle_id, version] in self._favorite_bundles:
self._favorite_bundles.append([bundle_id, version])
self.emit('bundle-changed', bundle)
self._write_favorites_file()
elif not favorite and [bundle_id, version] in self._favorite_bundles:
self._favorite_bundles.remove([bundle_id, version])
self.emit('bundle-changed', bundle)
self._write_favorites_file()
def is_bundle_favorite(self, bundle_id, version):
return [bundle_id, version] in self._favorite_bundles
def _write_favorites_file(self):
path = env.get_profile_path('favorite_activities')
favorites_data = {'defaults-mtime': self._last_defaults_mtime,
'favorites': self._favorite_bundles}
simplejson.dump(favorites_data, open(path, 'w'))
_instance = None
def get_registry():
global _instance
if not _instance:
_instance = BundleRegistry()
return _instance
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