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# Copyright 2009 One Laptop Per Child
# Author: Sayamindu Dasgupta <sayamindu@laptop.org>
#
# 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 logging
import os, os.path
import shutil
import sqlite3
import time
import gconf
from readbookmark import Bookmark
_logger = logging.getLogger('read-activity')
def _init_db():
dbdir = os.path.join(os.environ['SUGAR_ACTIVITY_ROOT'], 'data')
dbpath = os.path.join(dbdir, 'read_v1.db')
olddbpath = os.path.join(dbdir, 'read.db')
srcpath = os.path.join(os.environ['SUGAR_BUNDLE_PATH'], 'read_v1.db')
#Situation 0: Db is existent
if os.path.exists(dbpath):
return dbpath
#Situation 1: DB is non-existent at all
if not os.path.exists(dbpath) and not os.path.exists(olddbpath):
try:
os.makedirs(dbdir)
except:
pass
shutil.copy(srcpath, dbpath)
return dbpath
#Situation 2: DB is outdated
if not os.path.exists(dbpath) and os.path.exists(olddbpath):
shutil.copy(olddbpath, dbpath)
conn = sqlite3.connect(dbpath)
conn.execute("CREATE TABLE temp_bookmarks AS SELECT md5, page, title 'content', timestamp, user, color, local FROM bookmarks")
conn.execute("ALTER TABLE bookmarks RENAME TO bookmarks_old")
conn.execute("ALTER TABLE temp_bookmarks RENAME TO bookmarks")
conn.execute("DROP TABLE bookmarks_old")
conn.commit()
conn.close()
return dbpath
# Should not reach this point
return None
class BookmarkManager:
def __init__(self, filehash):
self._filehash = filehash
dbpath = _init_db()
assert dbpath != None
self._conn = sqlite3.connect(dbpath)
self._conn.text_factory = lambda x: unicode(x, "utf-8", "ignore")
self._bookmarks = []
self._populate_bookmarks()
def add_bookmark(self, page, content, local=1):
# locale = 0 means that this is a bookmark originally
# created by the person who originally shared the file
timestamp = time.time()
client = gconf.client_get_default()
user = client.get_string("/desktop/sugar/user/nick")
color = client.get_string("/desktop/sugar/user/color")
t = (self._filehash, page, content, timestamp, user, color, local)
self._conn.execute('insert into bookmarks values (?, ?, ?, ?, ?, ?, ?)', t)
self._conn.commit()
self._resync_bookmark_cache()
def del_bookmark(self, page):
client = gconf.client_get_default()
user = client.get_string("/desktop/sugar/user/nick")
# We delete only the locally made bookmark
t = (self._filehash, page, user)
self._conn.execute('delete from bookmarks where md5=? and page=? and user=?', t)
self._conn.commit()
self._resync_bookmark_cache()
def _populate_bookmarks(self):
# TODO: Figure out if caching the entire set of bookmarks is a good idea or not
rows = self._conn.execute('select * from bookmarks where md5=? order by page', (self._filehash,))
for row in rows:
self._bookmarks.append(Bookmark(row))
def get_bookmarks_for_page(self, page):
bookmarks = []
for bookmark in self._bookmarks:
if bookmark.belongstopage(page):
bookmarks.append(bookmark)
return bookmarks
def _resync_bookmark_cache(self):
# To be called when a new bookmark has been added/removed
self._bookmarks = []
self._populate_bookmarks()
def get_prev_bookmark_for_page(self, page, wrap = True):
if not len(self._bookmarks):
return None
if page <= self._bookmarks[0].page_no and wrap:
return self._bookmarks[-1]
else:
for i in range(page-1, -1, -1):
for bookmark in self._bookmarks:
if bookmark.belongstopage(i):
return bookmark
return None
def get_next_bookmark_for_page(self, page, wrap = True):
if not len(self._bookmarks):
return None
if page >= self._bookmarks[-1].page_no and wrap:
return self._bookmarks[0]
else:
for i in range(page+1, self._bookmarks[-1].page_no + 1):
for bookmark in self._bookmarks:
if bookmark.belongstopage(i):
return bookmark
return None
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