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#! /usr/bin/python
#
# Author: Arjun Sarwal arjun@laptop.org
# Copyright (C) 2007, Arjun Sarwal
# Copyright (C) 2009, Walter Bender
#
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
"""
journal.py
Start_new_session(user="", Xscale=0, Yscale=0) or
continue_existing_session(session_id_to_continue=-1): must be called
before every logging session for logging value by value, use
write_value(value=0),for logging a whole set of values into one
session at one time, use write_record(value_set=[]) Note: session_id's
are unique within one instance of an Activity and are not re-assigned
even if one or more logging sessions are deleted
"""
import csv
import os
import gtk
import dbus
import tempfile
import time
from os import environ
from os.path import join
from numpy import array
from gettext import gettext as _
from sugar.datastore import datastore
try:
import gconf
except:
from sugar import profile
class JournalInteraction():
def __init__(self, file_path, existing):
"""_jobject is the Journal object exiting denotes if a file exists with
that journal object (resumed from journal) or not (started afresh)"""
print "Journal Interaction: file path: " + str(file_path)
self.filepath= file_path
#self.filepath = _jobject.file_path
self.existing = existing #Denotes if journal file already exists or not
self.session_id = 0
self.num_rows=0
self.logginginterval_status = ' '
self.writer1 = None
self.writer2 = None
self.making_row = False
self.temp_buffer = []
self.append_existing=False
self._stopped = True
self.session_id_to_continue=0
self.jobject = None
self.user=""
self.Xscale = 0
self.Yscale = 0
if self.existing==True:
try:
self.set_max_session_id()
self.set_number_of_rows()
except:
print "Couldn't get session id or rows"
pass
print "$$journal.py: This is the file I will work on", self.filepath
def __del__(self):
pass
def on_quit(self):
pass
def set_max_session_id(self):
"""Sets the existing maximum session_id if the file already exists"""
self.session_id=self.get_number_of_records();
def set_number_of_rows(self):
"""Sets the number of rows an existing file has"""
reader = csv.reader(open(self.filepath, "rb"))
for row in reader:
self.num_rows+=1
def set_session_params(self, user="", Xscale=0, Yscale=0):
self.user = user
self.Xscale = Xscale
self.Yscale = Yscale
def start_new_session(self, user="", Xscale=0, Yscale=0, \
logginginterval_status=' ' ):
"""This needs to be called before starting any logging session"""
self.user = user
self.Xscale = Xscale
self.Yscale = Yscale
self.logginginterval_status = logginginterval_status
self.session_id+=1
self.num_rows+=1
self.append_existing=False
self.making_row=False
print "$$journal.py: a new session has started; the session_id is", \
self.session_id
return self.session_id
def continue_existing_session(self, session_id_to_continue=-1):
"""Must be called before attempting to continue any logging session"""
self.append_existing=True
self.session_id_to_continue=session_id_to_continue
self.making_row=True
def write_value(self, value=0):
"""Append the value passed to temp_buffer if a logging session is
started and continuted If a previous logging session is to be
continued upon, read the corresponding row from the file and continue
to append it and then rewrite the whole row"""
if self.append_existing==True:
self.apppend_session(self.session_id_to_continue)
self.append_existing=False
if self.making_row==False:
# self.write_session_params()
self.temp_buffer.append(value)
self.making_row = True
else:
self.temp_buffer.append(value)
self._stopped = False
print "$$Journal.py: I just wrote this value", value
def get_record(self, session_id=0):
"""Return list of values from logging session specified by session_id"""
reader = csv.reader(open(self.filepath, "rb"))
for row in reader:
if int(row[0])==session_id:
temp =row
for i in range(0,len(temp)):
if i!=1:
temp[i]=int(temp[i])
return temp
def get_number_of_records(self):
"""Returns the of records"""
reader = csv.reader(open(self.filepath, "rb"))
count=0
for row in reader:
count+=1
return count
def stop_session(self):
"""Write the temp_buffer onto a file"""
if self._stopped == False:
if self.existing==True:
writer1 = csv.writer(open(self.filepath, "ab"))
else:
writer1 = csv.writer(open(self.filepath, "wb"))
self.existing = True
for datum in self.temp_buffer:
writer1.writerow( [ datum ] )
del writer1
self.temp_buffer = []
self.making_row = False
self.append_existing = False
#print "$$journal.py: session stopped; csv writer was", writer1
try:
self.jobject = datastore.create()
try:
self.jobject.metadata['title'] = \
'Measure Activity log, ' + \
str(self.logginginterval_status)
self.jobject.metadata['keep'] = '0'
self.jobject.metadata['buddies'] = ''
self.jobject.metadata['preview'] = ''
try:
client = gconf.client_get_default()
self.jobject.metadata['icon-color'] = \
client.get_string("/desktop/sugar/user/color")
except:
self.jobject.metadata['icon-color'] = \
profile.get_color().to_string()
self.jobject.metadata['mime_type'] = 'text/csv'
self.jobject.file_path = self.filepath
datastore.write(self.jobject)
finally:
pass
finally:
print "$$$ in outermost finally!!"
self._stopped = True
def get_number_of_cols(self):
"""Returns the maximum number of columns amongst all the data"""
max = 0
reader = csv.reader(open(self.filepath, "rb"))
for row in reader:
if len(row)>max:
max=len(row)
return max
def write_record(self, values=[]):
"""Write a complete row specified by values
If file doesn't exist, open a new file and write to it"""
# self.write_session_params()
self.temp_buffer+=values
self.stop_session()
self._stopped = False
print "$$journal.py: Wrote record", values
def write_session_params(self):
"""Write the session parameters to temp_buffers"""
self.num_rows+=1
self.temp_buffer.append(_('Session: ' + str(self.session_id)))
self.temp_buffer.append(_('User: ' + str(self.user)))
self.temp_buffer.append(_('Interval: ' + str(self.logginginterval_status)))
##TODO: Probably need to add a field for timing interval
#self.temp_buffer.append(self.Xscale)
#self.temp_buffer.append(self.Yscale)
def get_session_params(self, session_id=-1):
"""TODO write this function"""
pass
def find_record(self, session_id=-1):
"""Returns the index 0 to N-1 of the record
session_id may be shifted around due to deletion and editing
returns -1 i it doesn't find it"""
reader = csv.reader(open(self.filepath, "rb"))
found=0
for i in range(0, self.num_rows):
temp = reader.next()
if int(temp[0])==session_id:
return found
else:
found+=1
return -1
def append_session(self, session_id=-1):
"""Deletes that record from the file and returns the existing
data in self.temp_buffer so that further recording can be done"""
reader = csv.reader(open(self.filepath, "rb"))
data_new = []
#####Copy all data except row to be deleted, to a temporary buffer
for row in reader:
if int(row[0])!=session_id:
data_new.append(row)
else:
self.temp_buffer=row
##Write the temporary buffer to the file again
writer = csv.writer(open(self.filepath, "wb"))
for i in range(0, len(data_new)):
writer.writerow(data_new[i])
self.making_row= True
def delete_record(self, session_id=-1):
"""Delete the record identified by its session_id"""
reader = csv.reader(open(self.filepath, "rb"))
data_new = []
#found = -1
##Copy all data except row to be deleted, to a temporary buffer
for row in reader:
if int(row[0])!=session_id:
data_new.append(row)
#print row
else:
pass
#if found==-1:
# return found
#print data_new[5]
####Write the temporary buffer to the file again
self.num_rows=len(data_new)
writer1 = csv.writer(open(self.filepath, "w"))
for i in range(0, len(data_new)):
writer1.writerow(data_new[i])
def get_existing_sessions_num(self):
"""Returns the number of existing sessions already done in that instance of the Activity"""
return self.num_rows
def get_records_values(self):
pass
def get_records_session_ids(self):
pass
def get_records_users(self):
pass
def get_all_records(self):
"""Gets the 2d array of all records"""
records = []
reader = csv.reader(open(self.filepath, "rb"))
for row in reader:
temp_row = [int(x) for x in row]
records.append(temp_row)
return array(records)
def take_activity_screenshot(self):
if self._model.get_zoom_level() != ShellModel.ZOOM_ACTIVITY:
return
if self.get_frame().visible:
return
home_model = self._model.get_home()
activity = home_model.get_active_activity()
if activity is not None:
service = activity.get_service()
if service is not None:
try:
service.TakeScreenshot(timeout=2.0)
except dbus.DBusException, e:
logging.debug('Error raised by TakeScreenshot(): %s', e)
def take_screenshot(self, waveform_id = 1):
#file_path = os.path.join(tempfile.gettempdir(), '%i' % time.time())
act_root = environ['SUGAR_ACTIVITY_ROOT']
tmp_dir = join(act_root, 'data')
file_path = str(tempfile.mkstemp(dir=tmp_dir)[1])
###TODO: This is such a crappy way to write a file to the journal
### Ideally to be implemented with write_file and read_file methods
os.chmod(file_path, 0777)
window = gtk.gdk.get_default_root_window()
width, height = window.get_size()
x_orig, y_orig = window.get_origin()
screenshot = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, has_alpha=False, \
bits_per_sample=8, width=width, \
height=height)
screenshot.get_from_drawable(window, window.get_colormap(), x_orig, \
y_orig, 0, 0, width, height)
screenshot.save(file_path, "png")
try:
jobject = datastore.create()
try:
jobject.metadata['title'] = _('Waveform ' + str(waveform_id) +\
' ,from Measure Activity')
jobject.metadata['keep'] = '0'
jobject.metadata['buddies'] = ''
jobject.metadata['preview'] = ''
try:
client = gconf.client_get_default()
jobject.metadata['icon-color'] = \
client.get_string("/desktop/sugar/user/color")
except:
jobject.metadata['icon-color'] = \
profile.get_color().to_string()
jobject.metadata['mime_type'] = 'image/png'
jobject.file_path = file_path
datastore.write(jobject)
finally:
jobject.destroy()
del jobject
finally:
os.remove(file_path)
"""
#FOR TESTING JOURNALINTERACTION CLASS
ji = JournalInteraction("myfile.csv", True)
print ji.get_all_records()
ji.set_session_params("guitar", 6, 6)
ji.write_record([1,1,1])
ji.write_record([2,2,2])
print ji.get_number_of_records()
ji.write_record([3,3,3])
ji.write_record([4,4,4])
print ji.get_number_of_records()
ji.write_record([5,5,5])
ji.write_record([6,6,6])
ji.write_record([7,7,7])
ji.append_session(0)
ji.write_value(2222)
ji.write_value(222222)
ji.stop_session()
ji.delete_record(3)
print type(ji.read_record(2)[0])
"""
|