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#
# $Id: Directory.py,v 1.12 1999/12/11 12:35:12 rob Exp $
#
# Copyright 1999 Rob Tillotson <robt@debian.org>
# All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose and without fee or royalty is
# hereby granted, provided that the above copyright notice appear in
# all copies and that both the copyright notice and this permission
# notice appear in supporting documentation or portions thereof,
# including modifications, that you you make.
#
# THE AUTHOR ROB TILLOTSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE!
#
"""Store in a local directory. (Pure version)
"""
__version__ = '$Id: Directory.py,v 1.12 1999/12/11 12:35:12 rob Exp $'
__copyright__ = 'Copyright 1999 Rob Tillotson <robt@debian.org>'
import os, time
import Pyrite
import Pyrite.Store
from Pyrite import protect_name
from Pyrite import pdbfile, Database
from Pyrite import _
from Pyrite.prc import File
class DirectoryStore(Pyrite.Store.BaseStore):
properties = ('read','create','delete','list')
db_properties = ('id-unique', 'id-replace')
def __init__(self, path='.'):
Pyrite.Store.BaseStore.__init__(self)
self.path = path
def _open(self, name, mode='rs', properties=()):
# this will be another inner API that we can put in a distributed object
# return value is (inner-db-object, info-structure, mode, properties)
# suitable for directly passing to the dbclass for instantiation
if 'w' in mode:
raise RuntimeError, _("cannot open an existing database for write")
t = self._find_db(name)
if t is None: raise IOError, _("no such database: %s") % name
return (t[0], t[1], mode, self.db_properties)
def _create(self, name, creator, type, flags=0, version=1, filename=None,
info=None):
if flags is None: flags = 0
i = { 'name': name,
'creator': creator,
'type': type,
'index': 0,
'more': 0,
'modnum': 0,
'version': version,
'createDate': int(time.time()),
'modifyDate': int(time.time()),
'backupDate': 0,
}
i.update(pdbfile.flags_to_info(flags))
if info is not None: i.update(info)
if len(i['name']) > 31: i['name'] = i['name'][:31]
if not filename:
filename = protect_name(name)+(flags & 0x0001 and '.prc' or '.pdb')
f = File(os.path.join(self.path, filename), 0, 1, i)
info = f.getDBInfo()
return (f, info, 'rws', self.db_properties)
def delete(self, name):
db, i, n = self._find_db(name)
if db is None: raise IOError, _("no such database: %s") % name
db.close()
os.unlink(os.path.join(self.path, n))
def info(self, name):
db, i, n = self._find_db(name)
if db is None: raise IOError, _("no such database: %s") % name
return db.info
def list(self):
return map(lambda x: x[1]['name'], pdbfile.listdir(self.path))
def listinfo(self, name=None, creator=None, type=None):
l = []
for i in map(lambda x: x[1], pdbfile.listdir(self.path)):
if name is not None and i['name'] != name: continue
if creator is not None and i['creator'] != creator: continue
if type is not None and i['type'] != type: continue
l.append(i)
return l
def getpref(self, creator, id, saved=1):
if saved: db, i, n = self._find_db('Saved Preferences')
else: db, i, n = self._find_db('Unsaved Preferences')
if db is None: raise RuntimeError, _("preferences database not found")
for r in db:
if r.type == creator and r.id == id:
v = struct.unpack('>H',r.raw[:2])[0]
return r.raw[2:], v
raise RuntimeError, _("preference '%s' %s not found") % (creator, id)
# new stuff in preparation for dynamic objects
def _try_open_db(self, fname, dbname=None):
try:
f = File(fname)
i = f.getDBInfo()
if dbname is None or i['name'] == dbname: return (f, i)
else: return None
except:
return None
def _find_db(self, name):
# %(name).pdb
n = protect_name(name)+'.pdb'
t = self._try_open_db(os.path.join(self.path,n), name)
if t is not None: return t+(n,)
# %(name).prc
n = protect_name(name)+'.prc'
t = self._try_open_db(os.path.join(self.path,n), name)
if t is not None: return t+(n,)
# %(name)
n = protect_name(name)
t = self._try_open_db(os.path.join(self.path,n), name)
if t is not None: return t+(n,)
# other arbitrary files
for n, i in pdbfile.listdir(self.path):
if i['name'] == name:
t = self._try_open_db(os.path.join(self.path,n), name)
if t is not None: return t+(n,)
return None
# end new stuff
class Store(Pyrite.Store.Store):
name = 'Directory'
author = Pyrite.author
version = Pyrite.version
description = _("PRC/PDB files in a directory.")
properties = ['read','create','delete','list']
store_class = DirectoryStore
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