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Viewing changes to ivle/webapp/tutorial/service.py

  • Committer: Nick Chadwick
  • Date: 2009-02-19 05:47:56 UTC
  • mto: (1099.1.180 new-dispatch)
  • mto: This revision was merged to the branch mainline in revision 1100.
  • Revision ID: chadnickbok@gmail.com-20090219054756-v984vmc7kheiq6xy
Updated the tutorial service, to now allow users to edit worksheets
online.

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ivle/webapp/tutorial/service.py
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import os
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import datetime
 
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import genshi
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import ivle.util
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import ivle.console
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import ivle.database
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from ivle.database import Exercise, ExerciseAttempt, ExerciseSave, Worksheet, Offering, Subject, Semester
 
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from ivle.database import Exercise, ExerciseAttempt, ExerciseSave, Worksheet, \
 
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                          Offering, Subject, Semester, WorksheetExercise
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import ivle.worksheet
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import ivle.conf
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import ivle.webapp.tutorial.test
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TIMESTAMP_FORMAT = '%Y-%m-%d %H:%M:%S'
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class AttemptsRESTView(JSONRESTView):
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    '''REST view of a user's attempts at an exercise.'''
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    def __init__(self, req, subject, year, semester, worksheet, 
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class WorksheetRESTView(JSONRESTView):
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    """View used to update a worksheet."""
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    def generate_exerciselist(self, req, worksheet):
 
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        """Runs through the worksheetstream, generating the appropriate
 
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        WorksheetExercises, and de-activating the old ones."""
 
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        exercises = []
 
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        # Turns the worksheet into an xml stream, and then finds all the 
 
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        # exercise nodes in the stream.
 
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        worksheet = genshi.XML(worksheet)
 
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        for kind, data, pos in worksheet:
 
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            if kind is genshi.core.START:
 
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                # Data is a tuple of tag name and a list of name->value tuples
 
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                if data[0] == 'exercise':
 
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                    src = ""
 
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                    optional = False
 
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                    for attr in data[1]:
 
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                        if attr[0] == 'src':
 
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                            src = attr[1]
 
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                        if attr[0] == 'optional':
 
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                            optional = attr[1] == 'true'
 
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                    if src != "":
 
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                        exercises.append((src, optional))
 
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        ex_num = 0
 
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        # Set all current worksheet_exercises to be inactive
 
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        db_worksheet_exercises = req.store.find(WorksheetExercise,
 
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            WorksheetExercise.worksheet_id == self.context.id)
 
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        for worksheet_exercise in db_worksheet_exercises:
 
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            worksheet_exercise.active = False
 
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        for exerciseid, optional in exercises:
 
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            worksheet_exercise = req.store.find(WorksheetExercise,
 
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                WorksheetExercise.worksheet_id == self.context.id,
 
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                Exercise.id == WorksheetExercise.exercise_id,
 
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                Exercise.id == exerciseid).one()
 
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            if worksheet_exercise is None:
 
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                exercise = req.store.find(Exercise,
 
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                    Exercise.id == exerciseid
 
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                ).one()
 
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                if exercise is None:
 
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                    raise NotFound()
 
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                worksheet_exercise = WorksheetExercise()
 
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                worksheet_exercise.worksheet_id = self.context.id
 
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                worksheet_exercise.exercise_id = exercise.id
 
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                req.store.add(worksheet_exercise)
 
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            worksheet_exercise.active = True
 
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            worksheet_exercise.seq_no = ex_num
 
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            worksheet_exercise.optional = optional
 
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    def get_permissions(self, user):
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        # XXX: Do it properly.
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        if user is not None:
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        self.semester = kwargs['semester']
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        self.context = req.store.find(Worksheet,
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            Worksheet.name == self.worksheet,
 
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            Worksheet.identifier == self.worksheet,
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            Worksheet.offering_id == Offering.id,
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            Offering.subject_id == Subject.id,
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            Subject.code == self.subject,
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            Offering.semester_id == Semester.id,
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            Semester.year == self.year,
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            Semester.semester == self.semester).one()
 
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        if self.context is None:
 
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            raise NotFound()
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    @named_operation('save')
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    def save(self, req, data):
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        self.worksheet.data = data
 
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    def save(self, req, name, assessable, data):
 
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        """Takes worksheet data and saves it."""
 
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        self.generate_exerciselist(req, data)
 
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        self.context.name = unicode(name)
 
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        self.context.data = unicode(data)
 
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        self.context.assessable = self.convert_bool(assessable)
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        return {"result": "ok"}