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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
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#Situation 2: DB is outdated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
def _init_db_highlights(conn):
conn.execute('CREATE TABLE IF NOT EXISTS HIGHLIGHTS ' +
'(md5 TEXT, page INTEGER, ' +
'init_pos INTEGER, end_pos INTEGER)')
conn.commit()
class BookmarkManager:
def __init__(self, filehash):
self._filehash = filehash
dbpath = _init_db()
assert dbpath != None
self._conn = sqlite3.connect(dbpath)
_init_db_highlights(self._conn)
self._conn.text_factory = lambda x: unicode(x, "utf-8", "ignore")
self._bookmarks = []
self._populate_bookmarks()
self._highlights = {0: []}
self._populate_highlights()
client = gconf.client_get_default()
self._user = client.get_string("/desktop/sugar/user/nick")
self._color = client.get_string("/desktop/sugar/user/color")
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()
t = (self._filehash, page, content, timestamp, self._user, \
self._color, local)
self._conn.execute('insert into bookmarks values ' + \
'(?, ?, ?, ?, ?, ?, ?)', t)
self._conn.commit()
self._resync_bookmark_cache()
def del_bookmark(self, page):
# We delete only the locally made bookmark
t = (self._filehash, page, self._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
def get_highlights(self, page):
try:
return self._highlights[page]
except KeyError:
self._highlights[page] = []
return self._highlights[page]
def add_highlight(self, page, highlight_tuple):
logging.error('Adding hg page %d %s' % (page, highlight_tuple))
self.get_highlights(page).append(highlight_tuple)
t = (self._filehash, page, highlight_tuple[0],
highlight_tuple[1])
self._conn.execute('insert into highlights values ' + \
'(?, ?, ?, ?)', t)
self._conn.commit()
def del_highlight(self, page, highlight_tuple):
self._highlights[page].remove(highlight_tuple)
t = (self._filehash, page, highlight_tuple[0], \
highlight_tuple[1])
self._conn.execute('delete from highlights ' + \
'where md5=? and page=? and init_pos=? and end_pos=?', \
t)
self._conn.commit()
def _populate_highlights(self):
rows = self._conn.execute('select * from highlights ' + \
'where md5=? order by page', (self._filehash, ))
for row in rows:
# md5 = row[0]
page = row[1]
init_pos = row[2]
end_pos = row[3]
highlight_tuple = [init_pos, end_pos]
self.get_highlights(page).append(highlight_tuple)
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