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path: root/monkey/action.py
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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/>.

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':
            self.feedback = data['feedback']
        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

        # 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']

        # 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':
            if self.feedback is not None:
                for hint in self.feedback:
                    if hint['id'] == 'test_results':
                        args = hint['args']
                        s += ' {0} / {1}'.format(args['passed'], args['total'])
                        break
        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 == 'prolog_solve':
            s += ' "' + self.query + '"'
        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
            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__':
    import sys, os.path
    sys.path.append(os.path.dirname(os.path.realpath(__file__)) + '/..') # the parent directory is the app directory

    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))