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# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2008 The University of Melbourne
#
# 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
# Module: TutorialService
# Author: Matt Giuca
# Date: 25/1/2008
# Provides the AJAX backend for the tutorial application.
# This allows several actions to be performed on the code the student has
# typed into one of the exercise boxes.
# Calling syntax
# Path must be empty.
# The arguments determine what is to be done on this file.
# "action". One of the tutorialservice actions.
# "exercise" - The path to a exercise file (including the .xml extension),
# relative to the subjects base directory.
# action "save" or "test" (POST only):
# "code" - Full text of the student's code being submitted.
# action "getattempts": No arguments. Returns a list of
# {'date': 'formatted_date', 'complete': bool} dicts.
# action "getattempt":
# "date" - Formatted date. Gets most recent attempt before (and including)
# that date.
# Returns JSON string containing code, or null.
# Returns a JSON response string indicating the results.
import os
import time
import datetime
import cjson
from ivle import util
from ivle import console
import ivle.database
import ivle.worksheet
import ivle.conf
import ivle.webapp.tutorial.test # XXX: Really .test, not real test.
from ivle.webapp.base.rest import JSONRESTView
import ivle.database
from ivle.webapp.base.rest import named_operation
# If True, getattempts or getattempt will allow browsing of inactive/disabled
# attempts. If False, will not allow this.
HISTORY_ALLOW_INACTIVE = False
TIMESTAMP_FORMAT = '%Y-%m-%d %H:%M:%S'
class AttemptsRESTView(JSONRESTView):
'''
Class to return a list of attempts for a given exercise, or add an Attempt
'''
def GET(self, req):
"""Handles a GET Attempts action."""
exercise = ivle.database.Exercise.get_by_name(req.store,
self.exercise)
user = ivle.database.User.get_by_login(req.store, self.username)
attempts = ivle.worksheet.get_exercise_attempts(req.store, user,
exercise, allow_inactive=HISTORY_ALLOW_INACTIVE)
# attempts is a list of ExerciseAttempt objects. Convert to dictionaries
time_fmt = lambda dt: datetime.datetime.strftime(dt, TIMESTAMP_FORMAT)
attempts = [{'date': time_fmt(a.date), 'complete': a.complete}
for a in attempts]
return attempts
def PUT(self, req, data):
''' Tests the given submission '''
exercisefile = util.open_exercise_file(self.exercise)
if exercisefile is None:
req.throw_error(req.HTTP_NOT_FOUND,
"The exercise was not found.")
# Start a console to run the tests on
jail_path = os.path.join(ivle.conf.jail_base, req.user.login)
working_dir = os.path.join("/home", req.user.login)
cons = console.Console(req.user.unixid, jail_path, working_dir)
# Parse the file into a exercise object using the test suite
exercise_obj = ivle.webapp.tutorial.test.parse_exercise_file(
exercisefile, cons)
exercisefile.close()
# Run the test cases. Get the result back as a JSONable object.
# Return it.
test_results = exercise_obj.run_tests(data['code'])
# Close the console
cons.close()
# Get the Exercise from the database
exercise = ivle.database.Exercise.get_by_name(req.store, self.exercise)
attempt = ivle.database.ExerciseAttempt(user=req.user,
exercise=exercise,
date=datetime.datetime.now(),
complete=test_results['passed'],
# XXX
text=unicode(data['code']))
req.store.add(attempt)
req.store.commit()
# Query the DB to get an updated score on whether or not this problem
# has EVER been completed (may be different from "passed", if it has
# been completed before), and the total number of attempts.
completed, attempts = ivle.worksheet.get_exercise_status(req.store,
req.user, exercise)
test_results["completed"] = completed
test_results["attempts"] = attempts
return test_results
class AttemptRESTView(JSONRESTView):
'''
View used to extract the data of a specified attempt
'''
def GET(self, req):
# Get an actual date object, rather than a string
date = datetime.datetime.strptime(self.date, TIMESTAMP_FORMAT)
exercise = ivle.database.Exercise.get_by_name(req.store, self.exercise)
attempt = ivle.worksheet.get_exercise_attempt(req.store, req.user,
exercise, as_of=date, allow_inactive=HISTORY_ALLOW_INACTIVE)
if attempt is not None:
attempt = attempt.text
# attempt may be None; will write "null"
return {'code': attempt}
class ExerciseRESTView(JSONRESTView):
'''
Handles a save action. This saves the user's code without executing it.
'''
@named_operation
def save(self, req, text):
# Need to open JUST so we know this is a real exercise.
# (This avoids users submitting code for bogus exercises).
exercisefile = util.open_exercise_file(self.exercise)
if exercisefile is None:
req.throw_error(req.HTTP_NOT_FOUND,
"The exercise was not found.")
exercisefile.close()
exercise = ivle.database.Exercise.get_by_name(req.store, self.exercise)
ivle.worksheet.save_exercise(req.store, req.user, exercise,
unicode(text), datetime.datetime.now())
req.store.commit()
return {"result": "ok"}
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