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#!/usr/bin/python3
# CodeQ: an online programming tutor.
# Copyright (C) 2015 UL FRI
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 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 Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
class Action:
def __init__(self, abstime, data):
self.type = data['typ']
self.time = abstime # time from start
# generic actions
if self.type == 'open':
self.timestamp = data['time']
elif self.type == 'ins':
self.type = 'insert'
self.offset = data['off']
self.text = data['txt']
self.length = len(self.text)
elif self.type == 'rm':
self.type = 'remove'
self.offset = data['off']
self.text = data['txt']
self.length = len(self.text)
elif self.type == 'test':
# data['feedback'] is a 'test_results' hint object, or a list
# containing such hint
hint = None
if isinstance(data['feedback'], list):
for hint in data['feedback']:
if hint['id'] == 'test_results':
break
else:
hint = data['feedback']
if hint is not None:
self.n_correct = hint['args']['passed']
self.n_all = hint['args']['total']
else:
self.n_correct = self.n_all = None
elif self.type == 'hint':
self.feedback = data['feedback']
elif self.type == 'hnt':
# obsolete Prolog hint action, with no additional info
self.type = 'hint'
self.feedback = None
elif self.type == 'plan':
self.index = data.get('index')
# Prolog actions
elif self.type == 'prolog_solve':
self.query = data['query']
elif self.type == 'slva':
# obsolete Prolog "solve all" action
self.type = 'prolog_solve'
self.query = data['qry']
elif self.type == 'experiment':
self.data = data['data']
# Python actions
elif self.type == 'python_input':
self.text = data['txt']
elif self.type == 'python_run':
self.program = data['program']
# robot actions
elif self.type == 'robot_run':
self.program = data['program']
def __str__(self):
s = 't = ' + str(self.time/1000.0) + ' ' + self.type
if self.type in {'insert', 'remove'}:
s += ': "' + self.text.replace('\n', '\\n').replace('\t', '\\t') + '" at ' + str(self.offset)
elif self.type == 'test':
s += ': {0} / {1}'.format(self.n_correct, self.n_all)
elif self.type == 'hint':
if self.feedback is not None:
s += ': ' + ', '.join(sorted([hint['id'] for hint in self.feedback]))
else:
s += ': ?'
elif self.type == 'plan':
if self.index is not None:
s += ': ' + str(self.index)
elif self.type == 'prolog_solve':
s += ': "' + self.query + '"'
elif self.type == 'experiment':
s += ': ' + self.data;
return s
# apply this action to text
def apply(self, text):
if self.type == 'insert':
return text[:self.offset] + self.text + text[self.offset:]
elif self.type == 'remove':
return text[:self.offset] + text[self.offset+self.length:]
else:
return text
# reverse the application of this action
def unapply(self, text):
if self.type == 'insert':
return text[:self.offset] + text[self.offset+self.length:]
elif self.type == 'remove':
return text[:self.offset] + self.text + text[self.offset:]
else:
return text
# parse log from database into a list of actions, cleaning up some fluff.
# ignore non-text actions (queries and tests)
def parse(data):
if data == None:
return [], []
actions = []
incorrect = set()
time = 0
code = ''
for packet in data:
try:
time += packet['dt']
action = Action(time, packet)
except:
# ignore any errors while decoding a packet
sys.stderr.write('Error decoding packet: {}\n'.format(packet))
continue
# skip normalization if this is the first action
if actions == []:
actions.append(action)
code = action.apply(code)
continue
# add to list of actions; modify previously added action if necessary
prev = actions[-1]
# remove superfluous REMOVE action when newline is inserted (due to editor auto-indent)
if prev.type == 'remove' and action.type == 'insert' and \
action.time == prev.time and \
action.offset == prev.offset and action.length > prev.length and \
action.text[action.length-prev.length:] == prev.text:
# discard last REMOVE action
code = prev.unapply(code)
actions.pop()
# replace current action with something better
length = action.length - prev.length
new = Action(prev.time, {'typ': 'ins', 'off': prev.offset, 'txt': action.text[:length]})
actions.append(new)
code = new.apply(code)
# remove superfluous INSERT action when newline is removed (due to editor auto-indent)
elif prev.type == 'remove' and action.type == 'insert' and \
action.time == prev.time and \
action.offset == prev.offset and action.length < prev.length and \
prev.text[prev.length-action.length:] == action.text:
# discard last INSERT action
code = prev.unapply(code)
actions.pop()
# replace current action with something better
length = prev.length - action.length
new = Action(prev.time, {'typ': 'rem', 'off': prev.offset, 'txt': prev.text[:length]})
actions.append(new)
code = new.apply(code)
# otherwise, simply append the current action
else:
actions.append(action)
code = action.apply(code)
return actions
# expand any multi-char actions (does not do anything for the 99%)
def expand(actions):
i = 0
while i < len(actions):
if actions[i].type == 'insert' and len(actions[i].text) > 1:
a = actions.pop(i)
for offset in range(len(a.text)):
actions.insert(i+offset,
Action(a.time, {'typ': 'ins', 'off': a.offset+offset, 'txt': a.text[offset]}))
i += len(a.text)
elif actions[i].type == 'remove' and len(actions[i].text) > 1:
a = actions.pop(i)
for offset in range(len(a.text)):
actions.insert(i,
Action(a.time, {'typ': 'rm', 'off': a.offset+offset, 'txt': a.text[offset]}))
i += len(a.text)
else:
i += 1
# some sample code
if __name__ == '__main__':
from db.models import Problem, Solution
# print all problem ids
print('problems:')
for problem in Problem.list():
print(' {}\t{}'.format(problem.id, problem.identifier))
print()
pid = input('enter problem id: ')
# print all attempt ids for the selected problem
print('users solving problem ' + str(pid) + ':')
attempts = Solution.filter(problem_id=pid)
print(', '.join([str(attempt.codeq_user_id) for attempt in attempts]))
print()
uid = input('enter user id: ')
attempt = Solution.get(problem_id=pid, codeq_user_id=uid)
try:
actions = parse(attempt.trace)
print('read ' + str(len(actions)) + ' actions from log')
print('code versions for this attempt:')
code = ''
for action in actions:
code = action.apply(code)
print(action)
print(code.strip())
print()
except Exception as ex:
sys.stderr.write('Error parsing action log: ' + str(ex))
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