Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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# without modification, are permitted provided that the following

# conditions are met:

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#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

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#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

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from functools import wraps

from traceback import format_exc

from urllib import quote, unquote

from django.http import HttpResponse

from django.utils import simplejson as json

from django.conf import settings

from django.core.urlresolvers import reverse

from django.utils.translation import ugettext as _

from astakos.im.models import AstakosUser, Service, Resource

from astakos.im.api.faults import Fault, ItemNotFound, InternalServerError, BadRequest

from astakos.im.settings import (

    INVITATIONS_ENABLED, COOKIE_NAME, EMAILCHANGE_ENABLED, QUOTAHOLDER_URL)

from astakos.im.forms import FeedbackForm

from astakos.im.functions import send_feedback as send_feedback_func

import logging

logger = logging.getLogger(__name__)

format = ('%a, %d %b %Y %H:%M:%S GMT')

absolute = lambda request, url: request.build_absolute_uri(url)

def render_fault(request, fault):

    if isinstance(fault, InternalServerError) and settings.DEBUG:

        fault.details = format_exc(fault)

    request.serialization = 'text'

    data = fault.message + '\n'

    if fault.details:

        data += '\n' + fault.details

    response = HttpResponse(data, status=fault.code)

    response['Content-Length'] = len(response.content)

    return response

def api_method(http_method=None):

    """Decorator function for views that implement an API method."""

    def decorator(func):

        @wraps(func)

        def wrapper(request, *args, **kwargs):

            try:

                if http_method and request.method != http_method:

                    raise BadRequest('Method not allowed.')

                response = func(request, *args, **kwargs)

                return response

            except Fault, fault:

                return render_fault(request, fault)

            except BaseException, e:

                logger.exception('Unexpected error: %s' % e)

                fault = InternalServerError('Unexpected error')

                return render_fault(request, fault)

        return wrapper

    return decorator

def get_services_dict():

    services = Service.objects.all()

    data = tuple({'id': s.pk, 'name': s.name, 'url': s.url, 'icon':

                 s.icon} for s in services)

    return data

@api_method(http_method=None)

def get_services(request):

    callback = request.GET.get('callback', None)

    mimetype = 'application/json'

    data = json.dumps(get_services_dict())

    if callback:

        mimetype = 'application/javascript'

        data = '%s(%s)' % (callback, data)

    return HttpResponse(content=data, mimetype=mimetype)

@api_method()

def get_menu(request, with_extra_links=False, with_signout=True):

    user = request.user

    from_location = request.GET.get('location')

    index_url = reverse('index')

    if from_location:

        index_url = "%s?next=%s" % (index_url, from_location)

    l = [{'url': absolute(request, index_url), 'name': _("Sign in")}]

    if user.is_authenticated():

        l = []

        append = l.append

        item = MenuItem

        item.current_path = absolute(request, request.path)

        append(item(

               url=absolute(request, reverse('index')),

               name=user.email))

        if with_extra_links:

            append(item(

                url=absolute(request, reverse('landing')),

                name="Overview")) 

        append(item(url=absolute(request, reverse('edit_profile')),

               name="Profile"))

        if with_extra_links:

            #if EMAILCHANGE_ENABLED:

                #append(item(

                #      url=absolute(request, reverse('email_change')),

                #       name="Change email"))

            if INVITATIONS_ENABLED:

                append(item(

                       url=absolute(request, reverse('invite')),

                       name="Invitations"))

            if QUOTAHOLDER_URL:

                append(item(

                       url=absolute(request, reverse('project_list')),

                       name="Projects"))

            append(item(

                   url=absolute(request, reverse('resource_usage')),

                   name="Usage"))

            append(item(

                url=absolute(request, reverse('api_access')),

                name="API Access")) 

            append(item(

                   url=absolute(request, reverse('feedback')),

                   name="Contact"))

        if with_signout:

            append(item(

                   url=absolute(request, reverse('logout')),

                   name="Sign out"))

    callback = request.GET.get('callback', None)

    data = json.dumps(tuple(l))

    mimetype = 'application/json'

    if callback:

        mimetype = 'application/javascript'

        data = '%s(%s)' % (callback, data)

    return HttpResponse(content=data, mimetype=mimetype)

class MenuItem(dict):

    current_path = ''

    def __init__(self, *args, **kwargs):

        super(MenuItem, self).__init__(*args, **kwargs)

        if kwargs.get('url') or kwargs.get('submenu'):

            self.__set_is_active__()

    def __setitem__(self, key, value):

        super(MenuItem, self).__setitem__(key, value)

        if key in ('url', 'submenu'):

            self.__set_is_active__()

    def __set_is_active__(self):

        if self.get('is_active'):

            return

        if self.current_path.startswith(self.get('url')):

            self.__setitem__('is_active', True)

        else:

            submenu = self.get('submenu', ())

            current = (i for i in submenu if i.get('url') == self.current_path)

            try:

                current_node = current.next()

                if not current_node.get('is_active'):

                    current_node.__setitem__('is_active', True)

                self.__setitem__('is_active', True)

            except StopIteration:

                return

    def __setattribute__(self, name, value):

        super(MenuItem, self).__setattribute__(name, value)

        if name == 'current_path':

            self.__set_is_active__()

def __get_uuid_displayname_catalogs(request):

    # Normal Response Codes: 200

    # Error Response Codes: badRequest (400)

    try:

        input_data = json.loads(request.raw_post_data)

    except:

        raise BadRequest('Request body should be json formatted.')

    else:

        uuids = input_data.get('uuids', [])

        displaynames = input_data.get('displaynames', [])

        d  = {'uuid_catalog':AstakosUser.objects.uuid_catalog(uuids),

              'displayname_catalog':AstakosUser.objects.displayname_catalog(displaynames)}

        response = HttpResponse()

        response.status = 200

        response.content = json.dumps(d)

        response['Content-Type'] = 'application/json; charset=UTF-8'

        response['Content-Length'] = len(response.content)

        return response

def __send_feedback(request, email_template_name='im/feedback_mail.txt', user=None):

    if not user:

        auth_token = request.POST.get('auth', '')

        if not auth_token:

            raise BadRequest('Missing user authentication')

        try:

            user = AstakosUser.objects.get(auth_token=auth_token)

        except AstakosUser.DoesNotExist:

            raise BadRequest('Invalid user authentication')

    form = FeedbackForm(request.POST)

    if not form.is_valid():

        raise BadRequest('Invalid data')

    msg = form.cleaned_data['feedback_msg']

    data = form.cleaned_data['feedback_data']

    try:

        send_feedback_func(msg, data, user, email_template_name)

    except:

        return HttpResponse(status=502)

    return HttpResponse(status=200)