NewsBlur/apps/reader/views.py

import datetime
import time
from django.shortcuts import render_to_response, get_object_or_404
from django.contrib.auth.decorators import login_required
from django.template import RequestContext
from django.template.loader import render_to_string
from django.db import IntegrityError
from django.views.decorators.cache import never_cache
from django.core.urlresolvers import reverse
from django.contrib.auth import login as login_user
from django.contrib.auth import logout as logout_user
from django.contrib.auth.models import User
from django.http import HttpResponse, HttpResponseRedirect, HttpResponseForbidden, Http404
from django.conf import settings
from django.core.mail import mail_admins
from django.core.validators import email_re
from django.core.mail import EmailMultiAlternatives
from collections import defaultdict
from operator import itemgetter
from apps.recommendations.models import RecommendedFeed
from apps.analyzer.models import MClassifierTitle, MClassifierAuthor, MClassifierFeed, MClassifierTag
from apps.analyzer.models import apply_classifier_titles, apply_classifier_feeds, apply_classifier_authors, apply_classifier_tags
from apps.analyzer.models import get_classifiers_for_user
from apps.profile.models import Profile
from apps.reader.models import UserSubscription, UserSubscriptionFolders, MUserStory, Feature
from apps.reader.forms import SignupForm, LoginForm, FeatureForm
from apps.rss_feeds.models import MFeedIcon
from apps.statistics.models import MStatistics, MFeedback
try:
    from apps.rss_feeds.models import Feed, MFeedPage, DuplicateFeed, MStory, MStarredStory, FeedLoadtime
except:
    pass
from utils import json_functions as json
from utils.user_functions import get_user, ajax_login_required
from utils.feed_functions import relative_timesince
from utils.story_functions import format_story_link_date__short
from utils.story_functions import format_story_link_date__long
from utils.story_functions import bunch
from utils.story_functions import story_score
from utils import log as logging
from utils.view_functions import get_argument_or_404
from utils.ratelimit import ratelimit
from vendor.timezones.utilities import localtime_for_timezone

SINGLE_DAY = 60*60*24

@never_cache
def index(request):
    if request.method == "POST":
        if request.POST['submit'] == 'login':
            login_form  = LoginForm(request.POST, prefix='login')
            signup_form = SignupForm(prefix='signup')
        else:
            login_form  = LoginForm(prefix='login')
            signup_form = SignupForm(request.POST, prefix='signup')
    else:
        login_form  = LoginForm(prefix='login')
        signup_form = SignupForm(prefix='signup')
    
    user         = get_user(request)
    authed       = request.user.is_authenticated()
    features     = Feature.objects.all()[:3]
    feature_form = FeatureForm() if request.user.is_staff else None
    feed_count   = UserSubscription.objects.filter(user=request.user).count() if authed else 0
    active_count = UserSubscription.objects.filter(user=request.user, active=True).count() if authed else 0
    train_count  = UserSubscription.objects.filter(user=request.user, active=True, is_trained=False, feed__stories_last_month__gte=1).count() if authed else 0
    recommended_feeds = RecommendedFeed.objects.filter(is_public=True, approved_date__lte=datetime.datetime.now()).select_related('feed')[:2]
    unmoderated_feeds = RecommendedFeed.objects.filter(is_public=False, declined_date__isnull=True).select_related('feed')[:2]
    statistics   = MStatistics.all()
    feedbacks    = MFeedback.all()
    start_import_from_google_reader = request.session.get('import_from_google_reader', False)
    if start_import_from_google_reader:
        del request.session['import_from_google_reader']

    return render_to_response('reader/feeds.xhtml', {
        'user_profile'      : hasattr(user, 'profile') and user.profile,
        'login_form'        : login_form,
        'signup_form'       : signup_form,
        'feature_form'      : feature_form,
        'features'          : features,
        'feed_count'        : feed_count,
        'active_count'      : active_count,
        'train_count'       : active_count - train_count,
        'account_images'    : range(1, 4),
        'recommended_feeds' : recommended_feeds,
        'unmoderated_feeds' : unmoderated_feeds,
        'statistics'        : statistics,
        'feedbacks'         : feedbacks,
        'start_import_from_google_reader': start_import_from_google_reader,
    }, context_instance=RequestContext(request))

@never_cache
def login(request):
    code = -1
    message = ""
    if request.method == "POST":
        form = LoginForm(request.POST, prefix='login')
        if form.is_valid():
            login_user(request, form.get_user())
            if request.POST.get('api'):
                logging.user(form.get_user(), "~FG~BB~SKiPhone Login~FW")
                code = 1
            else:
                logging.user(form.get_user(), "~FG~BBLogin~FW")
                return HttpResponseRedirect(reverse('index'))
        else:
            message = form.errors.items()[0][1][0]

    if request.POST.get('api'):
        return HttpResponse(json.encode(dict(code=code, message=message)), mimetype='application/json')
    else:
        return index(request)
    
@never_cache
def signup(request):
    if request.method == "POST":
        form = SignupForm(prefix='signup', data=request.POST)
        if form.is_valid():
            new_user = form.save()
            login_user(request, new_user)
            logging.user(new_user, "~FG~SB~BBNEW SIGNUP~FW")
            return HttpResponseRedirect(reverse('index'))

    return index(request)
        
@never_cache
def logout(request):
    logging.user(request, "~FG~BBLogout~FW")
    logout_user(request)
    
    if request.GET.get('api'):
        return HttpResponse(json.encode(dict(code=1)), mimetype='application/json')
    else:
        return HttpResponseRedirect(reverse('index'))

def autologin(request, username, secret):
    next = request.GET.get('next', '')
    
    if not username or not secret:
        return HttpResponseForbidden()
    
    profile = Profile.objects.filter(user__username=username, secret_token=secret)
    if not profile:
        return HttpResponseForbidden()

    user = profile[0].user
    user.backend = settings.AUTHENTICATION_BACKENDS[0]
    login_user(request, user)
    logging.user(user, "~FG~BB~SKAuto-Login. Next stop: %s~FW" % (next if next else 'Homepage',))
    
    if next:
        next = '?next=' + next
        
    return HttpResponseRedirect(reverse('index') + next)
    
@ratelimit(minutes=1, requests=10)
@json.json_view
def load_feeds(request):
    user             = get_user(request)
    feeds            = {}
    not_yet_fetched  = False
    include_favicons = request.REQUEST.get('include_favicons', False)
    flat             = request.REQUEST.get('flat', False)
    update_counts    = request.REQUEST.get('update_counts', False)
    
    if flat: return load_feeds_flat(request)
    
    try:
        folders = UserSubscriptionFolders.objects.get(user=user)
    except UserSubscriptionFolders.DoesNotExist:
        data = dict(feeds=[], folders=[])
        return data
    except UserSubscriptionFolders.MultipleObjectsReturned:
        UserSubscriptionFolders.objects.filter(user=user)[1:].delete()
        folders = UserSubscriptionFolders.objects.get(user=user)
    
    user_subs = UserSubscription.objects.select_related('feed').filter(user=user)
    
    for sub in user_subs:
        pk = sub.feed.pk
        if update_counts:
            sub.calculate_feed_scores(silent=True)
        feeds[pk] = sub.canonical(include_favicon=include_favicons)
        if feeds[pk].get('not_yet_fetched'):
            not_yet_fetched = True
        if not sub.feed.active and not sub.feed.has_feed_exception and not sub.feed.has_page_exception:
            sub.feed.count_subscribers()
            sub.feed.schedule_feed_fetch_immediately()
        if sub.active and sub.feed.active_subscribers <= 0:
            sub.feed.count_subscribers()
            sub.feed.schedule_feed_fetch_immediately()
            
    if not_yet_fetched:
        for f in feeds:
            if 'not_yet_fetched' not in feeds[f]:
                feeds[f]['not_yet_fetched'] = False

    starred_count = MStarredStory.objects(user_id=user.pk).count()

    data = {
        'feeds': feeds,
        'folders': json.decode(folders.folders),
        'starred_count': starred_count,
    }
    return data

@json.json_view
def load_feed_favicons(request):
    user = get_user(request)
    feed_ids = request.REQUEST.getlist('feed_ids')
    user_subs = UserSubscription.objects.select_related('feed').filter(user=user, active=True)
    if feed_ids and len(feed_ids) > 0:
        user_subs = user_subs.filter(feed__in=feed_ids)

    feed_ids   = [sub['feed__pk'] for sub in user_subs.values('feed__pk')]
    feed_icons = dict([(i.feed_id, i.data) for i in MFeedIcon.objects(feed_id__in=feed_ids)])
        
    return feed_icons

def load_feeds_flat(request):
    user = request.user
    include_favicons = request.REQUEST.get('include_favicons', False)
    feeds = {}
    
    if not user.is_authenticated():
        return HttpResponseForbidden()
    
    try:
        folders = UserSubscriptionFolders.objects.get(user=user)
    except UserSubscriptionFolders.DoesNotExist:
        data = dict(folders=[])
        return data
        
    user_subs = UserSubscription.objects.select_related('feed').filter(user=user, active=True)

    for sub in user_subs:
        if sub.needs_unread_recalc:
            sub.calculate_feed_scores(silent=True)
        feeds[sub.feed.pk] = sub.canonical(include_favicon=include_favicons)
    
    folders = json.decode(folders.folders)
    flat_folders = {}
    
    def make_feeds_folder(items, parent_folder="", depth=0):
        for item in items:
            if isinstance(item, int) and item in feeds:
                if not parent_folder:
                    parent_folder = ' '
                if parent_folder in flat_folders:
                    flat_folders[parent_folder].append(item)
                else:
                    flat_folders[parent_folder] = [item]
            elif isinstance(item, dict):
                for folder_name in item:
                    folder = item[folder_name]
                    flat_folder_name = "%s%s%s" % (
                        parent_folder if parent_folder and parent_folder != ' ' else "",
                        " - " if parent_folder and parent_folder != ' ' else "",
                        folder_name
                    )
                    flat_folders[flat_folder_name] = []
                    make_feeds_folder(folder, flat_folder_name, depth+1)
        
    make_feeds_folder(folders)
    data = dict(flat_folders=flat_folders, feeds=feeds, user=user.username)
    return data

@ratelimit(minutes=1, requests=10)
@json.json_view
def refresh_feeds(request):
    start = datetime.datetime.utcnow()
    user = get_user(request)
    feed_ids = request.REQUEST.getlist('feed_id')
    feeds = {}
    user_subs = UserSubscription.objects.select_related('feed').filter(user=user, active=True)
    feed_ids = [f for f in feed_ids if f and not f.startswith('river')]
    if feed_ids:
        user_subs = user_subs.filter(feed__in=feed_ids)
    UNREAD_CUTOFF = datetime.datetime.utcnow() - datetime.timedelta(days=settings.DAYS_OF_UNREAD)
    favicons_fetching = [int(f) for f in request.REQUEST.getlist('favicons_fetching') if f]
    feed_icons = dict([(i.feed_id, i) for i in MFeedIcon.objects(feed_id__in=favicons_fetching)])
    
    for sub in user_subs:
        pk = sub.feed.pk
        if (sub.needs_unread_recalc or 
            sub.unread_count_updated < UNREAD_CUTOFF or 
            sub.oldest_unread_story_date < UNREAD_CUTOFF):
            sub.calculate_feed_scores(silent=True)
        feeds[pk] = {
            'ps': sub.unread_count_positive,
            'nt': sub.unread_count_neutral,
            'ng': sub.unread_count_negative,
        }
        if sub.feed.has_feed_exception or sub.feed.has_page_exception:
            feeds[pk]['has_exception'] = True
            feeds[pk]['exception_type'] = 'feed' if sub.feed.has_feed_exception else 'page'
            feeds[pk]['feed_address'] = sub.feed.feed_address
            feeds[pk]['exception_code'] = sub.feed.exception_code
        if request.REQUEST.get('check_fetch_status', False):
            feeds[pk]['not_yet_fetched'] = not sub.feed.fetched_once
            
        if sub.feed.pk in favicons_fetching and sub.feed.pk in feed_icons:
            feeds[pk]['favicon'] = feed_icons[sub.feed.pk].data
            feeds[pk]['favicon_color'] = feed_icons[sub.feed.pk].color
            feeds[pk]['favicon_fetching'] = bool(not (feed_icons[sub.feed.pk].not_found or
                                                      feed_icons[sub.feed.pk].data))
    
    if favicons_fetching:
        sub_feed_ids = [s.feed.pk for s in user_subs]
        moved_feed_ids = [f for f in favicons_fetching if f not in sub_feed_ids]
        for moved_feed_id in moved_feed_ids:
            duplicate_feeds = DuplicateFeed.objects.filter(duplicate_feed_id=moved_feed_id)
            if duplicate_feeds and duplicate_feeds[0].feed.pk in feeds:
                feeds[moved_feed_id] = feeds[duplicate_feeds[0].feed.pk]
                feeds[moved_feed_id]['dupe_feed_id'] = duplicate_feeds[0].feed.pk
        
    if settings.DEBUG:
        diff = datetime.datetime.utcnow()-start
        timediff = float("%s.%.2s" % (diff.seconds, (diff.microseconds / 1000)))
        logging.user(request, "~FBRefreshing %s feeds (%s seconds)" % (user_subs.count(), timediff))
    
    return {'feeds': feeds}

def refresh_feed(request, feed_id):
    user = get_user(request)
    feed = get_object_or_404(Feed, pk=feed_id)
    
    feed = feed.update(force=True, compute_scores=False)
    usersub = UserSubscription.objects.get(user=user, feed=feed)
    usersub.calculate_feed_scores(silent=False)

    return load_single_feed(request, feed_id)
    
@json.json_view
def load_single_feed(request, feed_id):
    start        = time.time()
    user         = get_user(request)
    offset       = int(request.REQUEST.get('offset', 0))
    limit        = int(request.REQUEST.get('limit', 12))
    page         = int(request.REQUEST.get('page', 1))
    dupe_feed_id = None
    userstories_db = None
        
    if page: offset = limit * (page-1)
    if not feed_id: raise Http404
        
    try:
        feed = Feed.objects.get(id=feed_id)
    except Feed.DoesNotExist:
        feed_address = request.REQUEST.get('feed_address')
        dupe_feed = DuplicateFeed.objects.filter(duplicate_address=feed_address)
        if dupe_feed:
            feed = dupe_feed[0].feed
            dupe_feed_id = feed_id
        else:
            raise Http404
        
    stories = feed.get_stories(offset, limit) 
        
    # Get intelligence classifier for user
    classifier_feeds   = list(MClassifierFeed.objects(user_id=user.pk, feed_id=feed_id))
    classifier_authors = list(MClassifierAuthor.objects(user_id=user.pk, feed_id=feed_id))
    classifier_titles  = list(MClassifierTitle.objects(user_id=user.pk, feed_id=feed_id))
    classifier_tags    = list(MClassifierTag.objects(user_id=user.pk, feed_id=feed_id))
    
    checkpoint1 = time.time()
    
    usersub = UserSubscription.objects.get(user=user, feed=feed)
    userstories = []
    if usersub and stories:
        story_ids = [story['id'] for story in stories]
        userstories_db = MUserStory.objects(user_id=user.pk,
                                            feed_id=feed.pk,
                                            story_id__in=story_ids).only('story_id')
        starred_stories = MStarredStory.objects(user_id=user.pk, 
                                                story_feed_id=feed_id, 
                                                story_guid__in=story_ids).only('story_guid', 'starred_date')
        starred_stories = dict([(story.story_guid, story.starred_date) for story in starred_stories])
        userstories = set(us.story_id for us in userstories_db)
            
    checkpoint2 = time.time()
    
    for story in stories:
        story_date = localtime_for_timezone(story['story_date'], user.profile.timezone)
        now = localtime_for_timezone(datetime.datetime.now(), user.profile.timezone)
        story['short_parsed_date'] = format_story_link_date__short(story_date, now)
        story['long_parsed_date'] = format_story_link_date__long(story_date, now)
        if usersub:
            if story['id'] in userstories:
                story['read_status'] = 1
            elif not story.get('read_status') and story['story_date'] < usersub.mark_read_date:
                story['read_status'] = 1
            elif not story.get('read_status') and story['story_date'] > usersub.last_read_date:
                story['read_status'] = 0
            if story['id'] in starred_stories:
                story['starred'] = True
                starred_date = localtime_for_timezone(starred_stories[story['id']], user.profile.timezone)
                story['starred_date'] = format_story_link_date__long(starred_date, now)
        else:
            story['read_status'] = 1
        story['intelligence'] = {
            'feed': apply_classifier_feeds(classifier_feeds, feed),
            'author': apply_classifier_authors(classifier_authors, story),
            'tags': apply_classifier_tags(classifier_tags, story),
            'title': apply_classifier_titles(classifier_titles, story),
        }

    checkpoint3 = time.time()
    
    # Intelligence
    feed_tags = json.decode(feed.data.popular_tags) if feed.data.popular_tags else []
    feed_authors = json.decode(feed.data.popular_authors) if feed.data.popular_authors else []
    classifiers = get_classifiers_for_user(user, feed_id, classifier_feeds, 
                                           classifier_authors, classifier_titles, classifier_tags)
    
    if usersub:
        usersub.feed_opens += 1
        usersub.save()
    diff1 = checkpoint1-start
    diff2 = checkpoint2-start
    diff3 = checkpoint3-start
    timediff = time.time()-start
    last_update = relative_timesince(feed.last_update)
    logging.user(request, "~FYLoading feed: ~SB%s%s ~SN(%.4s seconds, ~SB%.4s/%.4s(%s)/%.4s~SN)" % (
        feed.feed_title[:32], ('~SN/p%s' % page) if page > 1 else '', timediff,
        diff1, diff2, userstories_db and userstories_db.count() or '~SN0~SB', diff3))
    FeedLoadtime.objects.create(feed=feed, loadtime=timediff)
    
    data = dict(stories=stories, 
                feed_tags=feed_tags, 
                feed_authors=feed_authors, 
                classifiers=classifiers,
                last_update=last_update,
                feed_id=feed.pk)
    
    if dupe_feed_id: data['dupe_feed_id'] = dupe_feed_id
    if not usersub:
        data.update(feed.canonical())
        
    return data

def load_feed_page(request, feed_id):
    if not feed_id:
        raise Http404
        
    data = MFeedPage.get_data(feed_id=feed_id)

    if not data:
        data = "Fetching feed..."
    
    return HttpResponse(data, mimetype='text/html')
    
@json.json_view
def load_starred_stories(request):
    user = get_user(request)
    offset = int(request.REQUEST.get('offset', 0))
    limit = int(request.REQUEST.get('limit', 10))
    page = int(request.REQUEST.get('page', 0))
    if page: offset = limit * (page - 1)
        
    mstories = MStarredStory.objects(user_id=user.pk).order_by('-starred_date')[offset:offset+limit]
    stories = Feed.format_stories(mstories)
    
    for story in stories:
        story_date = localtime_for_timezone(story['story_date'], user.profile.timezone)
        now = localtime_for_timezone(datetime.datetime.now(), user.profile.timezone)
        story['short_parsed_date'] = format_story_link_date__short(story_date, now)
        story['long_parsed_date'] = format_story_link_date__long(story_date, now)
        starred_date = localtime_for_timezone(story['starred_date'], user.profile.timezone)
        story['starred_date'] = format_story_link_date__long(starred_date, now)
        story['read_status'] = 1
        story['starred'] = True
        story['intelligence'] = {
            'feed': 0,
            'author': 0,
            'tags': 0,
            'title': 0,
        }
    
    logging.user(request, "~FCLoading starred stories: ~SB%s stories" % (len(stories)))
    
    return dict(stories=stories)

@json.json_view
def load_river_stories(request):
    limit              = 18
    offset             = 0
    start              = datetime.datetime.utcnow()
    user               = get_user(request)
    feed_ids           = [int(feed_id) for feed_id in request.REQUEST.getlist('feeds') if feed_id]
    original_feed_ids  = list(feed_ids)
    page               = int(request.REQUEST.get('page', 1))
    read_stories_count = int(request.REQUEST.get('read_stories_count', 0))
    new_flag           = request.REQUEST.get('new_flag', False)
    bottom_delta       = datetime.timedelta(days=settings.DAYS_OF_UNREAD)
    
    if not feed_ids: 
        logging.user(request, "~FCLoading empty river stories: page %s" % (page))
        return dict(stories=[])
    
    # Fetch all stories at and before the page number.
    # Not a single page, because reading stories can move them up in the unread order.
    # `read_stories_count` is an optimization, works best when all 25 stories before have been read.
    limit = limit * page - read_stories_count
    
    # Read stories to exclude
    read_stories = MUserStory.objects(user_id=user.pk, feed_id__in=feed_ids).only('story_id')
    read_stories = [rs.story_id for rs in read_stories]
    
    # Determine mark_as_read dates for all feeds to ignore all stories before this date.
    # max_feed_count     = 0
    feed_counts     = {}
    feed_last_reads = {}
    for feed_id in feed_ids:
        try:
            usersub = UserSubscription.objects.get(feed__pk=feed_id, user=user)
        except UserSubscription.DoesNotExist:
            continue
        if not usersub: continue
        feed_counts[feed_id] = (usersub.unread_count_negative * 1 + 
                                usersub.unread_count_neutral * 10 +
                                usersub.unread_count_positive * 20)
        # if feed_counts[feed_id] > max_feed_count:
        #     max_feed_count = feed_counts[feed_id]
        feed_last_reads[feed_id] = int(time.mktime(usersub.mark_read_date.timetuple()))
    feed_counts = sorted(feed_counts.items(), key=itemgetter(1))[:50]
    feed_ids = [f[0] for f in feed_counts]
    feed_last_reads = dict([(str(feed_id), feed_last_reads[feed_id]) for feed_id in feed_ids
                            if feed_id in feed_last_reads])
    feed_counts = dict(feed_counts)

    # After excluding read stories, all that's left are stories 
    # past the mark_read_date. Everything returned is guaranteed to be unread.
    mstories = MStory.objects(
        story_guid__nin=read_stories,
        story_feed_id__in=feed_ids,
        # story_date__gte=start - bottom_delta
    ).map_reduce("""function() {
            var d = feed_last_reads[this[~story_feed_id]];
            if (this[~story_date].getTime()/1000 > d) {
                emit(this[~id], this);
            }
        }""",
        """function(key, values) {
            return values[0];
        }""",
        output='inline',
        scope={
            'feed_last_reads': feed_last_reads
        }
    )
    mstories = [story.value for story in mstories if story and story.value]

    mstories = sorted(mstories, cmp=lambda x, y: cmp(story_score(y, bottom_delta), story_score(x, bottom_delta)))

    # story_feed_counts = defaultdict(int)
    # mstories_pruned = []
    # for story in mstories:
    #     print story['story_title'], story_feed_counts[story['story_feed_id']]
    #     if story_feed_counts[story['story_feed_id']] >= 3: continue
    #     mstories_pruned.append(story)
    #     story_feed_counts[story['story_feed_id']] += 1
    stories = []
    for i, story in enumerate(mstories):
        if i < offset: continue
        if i >= offset + limit: break
        stories.append(bunch(story))
    stories = Feed.format_stories(stories)
    found_feed_ids = list(set([story['story_feed_id'] for story in stories]))
    
    # Find starred stories
    starred_stories = MStarredStory.objects(
        user_id=user.pk,
        story_feed_id__in=found_feed_ids
    ).only('story_guid', 'starred_date')
    starred_stories = dict([(story.story_guid, story.starred_date) 
                            for story in starred_stories])
    
    # Intelligence classifiers for all feeds involved
    def sort_by_feed(classifiers):
        feed_classifiers = defaultdict(list)
        for classifier in classifiers:
            feed_classifiers[classifier.feed_id].append(classifier)
        return feed_classifiers
    classifier_feeds   = sort_by_feed(MClassifierFeed.objects(user_id=user.pk, feed_id__in=found_feed_ids))
    classifier_authors = sort_by_feed(MClassifierAuthor.objects(user_id=user.pk, feed_id__in=found_feed_ids))
    classifier_titles  = sort_by_feed(MClassifierTitle.objects(user_id=user.pk, feed_id__in=found_feed_ids))
    classifier_tags    = sort_by_feed(MClassifierTag.objects(user_id=user.pk, feed_id__in=found_feed_ids))
    
    classifiers = {}
    for feed_id in found_feed_ids:
        classifiers[feed_id] = get_classifiers_for_user(user, feed_id, classifier_feeds[feed_id], 
                                                        classifier_authors[feed_id],
                                                        classifier_titles[feed_id],
                                                        classifier_tags[feed_id])
    
    # Just need to format stories
    for story in stories:
        story_date = localtime_for_timezone(story['story_date'], user.profile.timezone)
        now = localtime_for_timezone(datetime.datetime.now(), user.profile.timezone)
        story['short_parsed_date'] = format_story_link_date__short(story_date, now)
        story['long_parsed_date']  = format_story_link_date__long(story_date, now)
        story['read_status'] = 0
        if story['id'] in starred_stories:
            story['starred'] = True
            starred_date = localtime_for_timezone(starred_stories[story['id']], user.profile.timezone)
            story['starred_date'] = format_story_link_date__long(starred_date, now)
        story['intelligence'] = {
            'feed':   apply_classifier_feeds(classifier_feeds[story['story_feed_id']], story['story_feed_id']),
            'author': apply_classifier_authors(classifier_authors[story['story_feed_id']], story),
            'tags':   apply_classifier_tags(classifier_tags[story['story_feed_id']], story),
            'title':  apply_classifier_titles(classifier_titles[story['story_feed_id']], story),
        }
    
    diff = datetime.datetime.utcnow() - start
    timediff = float("%s.%.2s" % (diff.seconds, (diff.microseconds / 1000)))
    logging.user(request, "~FCLoading river stories: page %s - ~SB%s/%s "
                               "stories ~SN(%s/%s/%s feeds) ~FB(%s seconds)" % 
                               (page, len(stories), len(mstories), len(found_feed_ids), 
                               len(feed_ids), len(original_feed_ids), timediff))
    
    if new_flag:
        return dict(stories=stories, classifiers=classifiers)
    else:
        logging.user(request, "~BR~FCNo new flag on river")
        return dict(stories=stories)
    
    
@ajax_login_required
@json.json_view
def mark_all_as_read(request):
    code = 1
    days = int(request.POST.get('days', 0))
    
    feeds = UserSubscription.objects.filter(user=request.user)
    for sub in feeds:
        if days == 0:
            sub.mark_feed_read()
        else:
            read_date = datetime.datetime.utcnow() - datetime.timedelta(days=days)
            if sub.mark_read_date < read_date:
                sub.needs_unread_recalc = True
                sub.mark_read_date = read_date
                sub.save()
    
    logging.user(request, "~FMMarking all as read: ~SB%s days" % (days,))
    return dict(code=code)
    
@ajax_login_required
@json.json_view
def mark_story_as_read(request):
    story_ids = request.REQUEST.getlist('story_id')
    feed_id = int(get_argument_or_404(request, 'feed_id'))

    try:
        usersub = UserSubscription.objects.select_related('feed').get(user=request.user, feed=feed_id)
    except (UserSubscription.DoesNotExist, Feed.DoesNotExist):
        duplicate_feed = DuplicateFeed.objects.filter(duplicate_feed_id=feed_id)
        if duplicate_feed:
            try:
                usersub = UserSubscription.objects.get(user=request.user, 
                                                       feed=duplicate_feed[0].feed)
            except (UserSubscription.DoesNotExist, Feed.DoesNotExist):
                return dict(code=-1)
        else:
            return dict(code=-1)
    
    data = usersub.mark_story_ids_as_read(story_ids, request=request)
    
    return data
    
@ajax_login_required
@json.json_view
def mark_feed_stories_as_read(request):
    feeds_stories = request.REQUEST.get('feeds_stories', "{}")
    feeds_stories = json.decode(feeds_stories)
    for feed_id, story_ids in feeds_stories.items():
        feed_id = int(feed_id)
        try:
            usersub = UserSubscription.objects.select_related('feed').get(user=request.user, feed=feed_id)
        except (UserSubscription.DoesNotExist, Feed.DoesNotExist):
            duplicate_feed = DuplicateFeed.objects.filter(duplicate_feed_id=feed_id)
            if duplicate_feed:
                try:
                    usersub = UserSubscription.objects.get(user=request.user, 
                                                           feed=duplicate_feed[0].feed)
                except (UserSubscription.DoesNotExist, Feed.DoesNotExist):
                    continue
            else:
                continue
        usersub.mark_story_ids_as_read(story_ids)
    
    return dict(code=1)
    
@ajax_login_required
@json.json_view
def mark_story_as_unread(request):
    story_id = request.POST['story_id']
    feed_id = int(request.POST['feed_id'])

    usersub = UserSubscription.objects.select_related('feed').get(user=request.user, feed=feed_id)
                
    if not usersub.needs_unread_recalc:
        usersub.needs_unread_recalc = True
        usersub.save()
        
    data = dict(code=0, payload=dict(story_id=story_id))
    logging.user(request, "~FY~SBUnread~SN story in feed: %s" % (usersub.feed))
    
    story = MStory.objects(story_feed_id=feed_id, story_guid=story_id)[0]
    
    if story.story_date < usersub.mark_read_date:
        # Story is outside the mark as read range, so invert all stories before.
        newer_stories = MStory.objects(story_feed_id=story.story_feed_id,
                                       story_date__gte=story.story_date,
                                       story_date__lte=usersub.mark_read_date
                                       ).only('story_guid')
        newer_stories = [s.story_guid for s in newer_stories]
        usersub.mark_read_date = story.story_date - datetime.timedelta(minutes=1)
        usersub.needs_unread_recalc = True
        usersub.save()
        
        # Mark stories as read only after the mark_read_date has been moved, otherwise
        # these would be ignored.
        data = usersub.mark_story_ids_as_read(newer_stories, request=request)
        
    m = MUserStory.objects(story_id=story_id, user_id=request.user.pk, feed_id=feed_id)
    m.delete()
    
    return data
    
@ajax_login_required
@json.json_view
def mark_feed_as_read(request):
    feed_ids = [int(f) for f in request.REQUEST.getlist('feed_id') if f]
    feed_count = len(feed_ids)
    multiple = feed_count > 1
    code = 0
    for feed_id in feed_ids:
        try:
            feed = Feed.objects.get(id=feed_id)
        except Feed.DoesNotExist:
            continue
        code = 0
    
        us = UserSubscription.objects.get(feed=feed, user=request.user)
        try:
            if us:
                us.mark_feed_read()
        except IntegrityError:
            code = -1
        else:
            code = 1
        
        if not multiple:
            logging.user(request, "~FMMarking feed as read: ~SB%s" % (feed,))
            
    if multiple:
        logging.user(request, "~FMMarking ~SB%s~SN feeds as read" % (feed_count,))
        
    return dict(code=code)

def _parse_user_info(user):
    return {
        'user_info': {
            'is_anonymous': json.encode(user.is_anonymous()),
            'is_authenticated': json.encode(user.is_authenticated()),
            'username': json.encode(user.username if user.is_authenticated() else 'Anonymous')
        }
    }

@ajax_login_required
@json.json_view
def add_url(request):
    code = 0
    url = request.POST['url']
    if not url:
        code = -1
        message = 'Enter in the website address or the feed URL.'
    else:
        folder = request.POST.get('folder', '')
        code, message, _ = UserSubscription.add_subscription(user=request.user, feed_address=url, folder=folder)
    
    return dict(code=code, message=message)

@ajax_login_required
@json.json_view
def add_folder(request):
    folder = request.POST['folder']
    parent_folder = request.POST.get('parent_folder', '')

    logging.user(request, "~FRAdding Folder: ~SB%s (in %s)" % (folder, parent_folder))
    
    if folder:
        code = 1
        message = ""
        user_sub_folders_object, _ = UserSubscriptionFolders.objects.get_or_create(user=request.user)
        user_sub_folders_object.add_folder(parent_folder, folder)
    else:
        code = -1
        message = "Gotta write in a folder name."
        
    return dict(code=code, message=message)

@ajax_login_required
@json.json_view
def delete_feed(request):
    feed_id = int(request.POST['feed_id'])
    in_folder = request.POST.get('in_folder', '')
    if in_folder == ' ':
        in_folder = ""
    
    user_sub_folders = get_object_or_404(UserSubscriptionFolders, user=request.user)
    user_sub_folders.delete_feed(feed_id, in_folder)
    
    feed = Feed.objects.filter(pk=feed_id)
    if feed:
        feed[0].count_subscribers()
    
    return dict(code=1)
    
@ajax_login_required
@json.json_view
def delete_folder(request):
    folder_to_delete = request.POST['folder_name']
    in_folder = request.POST.get('in_folder', '')
    feed_ids_in_folder = [int(f) for f in request.REQUEST.getlist('feed_id') if f]
    
    # Works piss poor with duplicate folder titles, if they are both in the same folder.
    # Deletes all, but only in the same folder parent. But nobody should be doing that, right?
    user_sub_folders = get_object_or_404(UserSubscriptionFolders, user=request.user)
    user_sub_folders.delete_folder(folder_to_delete, in_folder, feed_ids_in_folder)

    return dict(code=1)
    
@ajax_login_required
@json.json_view
def rename_feed(request):
    feed = get_object_or_404(Feed, pk=int(request.POST['feed_id']))
    user_sub = UserSubscription.objects.get(user=request.user, feed=feed)
    feed_title = request.POST['feed_title']
    
    logging.user(request, "~FRRenaming feed '~SB%s~SN' to: ~SB%s" % (
                 feed.feed_title, feed_title))
                 
    user_sub.user_title = feed_title
    user_sub.save()
    
    return dict(code=1)
    
@ajax_login_required
@json.json_view
def rename_folder(request):
    folder_to_rename = request.POST['folder_name']
    new_folder_name = request.POST['new_folder_name']
    in_folder = request.POST.get('in_folder', '')
    
    # Works piss poor with duplicate folder titles, if they are both in the same folder.
    # renames all, but only in the same folder parent. But nobody should be doing that, right?
    if new_folder_name:
        user_sub_folders = get_object_or_404(UserSubscriptionFolders, user=request.user)
        user_sub_folders.rename_folder(folder_to_rename, new_folder_name, in_folder)

    return dict(code=1)
    
@ajax_login_required
@json.json_view
def move_feed_to_folder(request):
    feed_id = int(request.POST['feed_id'])
    in_folder = request.POST.get('in_folder', '')
    to_folder = request.POST.get('to_folder', '')
    
    user_sub_folders = get_object_or_404(UserSubscriptionFolders, user=request.user)
    user_sub_folders = user_sub_folders.move_feed_to_folder(feed_id, in_folder=in_folder, to_folder=to_folder)

    return dict(code=1, folders=json.decode(user_sub_folders.folders))
    
@ajax_login_required
@json.json_view
def move_folder_to_folder(request):
    folder_name = request.POST['folder_name']
    in_folder = request.POST.get('in_folder', '')
    to_folder = request.POST.get('to_folder', '')
    
    user_sub_folders = get_object_or_404(UserSubscriptionFolders, user=request.user)
    user_sub_folders = user_sub_folders.move_folder_to_folder(folder_name, in_folder=in_folder, to_folder=to_folder)

    return dict(code=1, folders=json.decode(user_sub_folders.folders))
    
@login_required
def add_feature(request):
    if not request.user.is_staff:
        return HttpResponseForbidden()

    code = -1    
    form = FeatureForm(request.POST)
    
    if form.is_valid():
        form.save()
        code = 1
        return HttpResponseRedirect(reverse('index'))
    
    return dict(code=code)
    
@json.json_view
def load_features(request):
    user = get_user(request)
    page = int(request.REQUEST.get('page', 0))
    logging.user(request, "~FBBrowse features: ~SBPage #%s" % (page+1))
    features = Feature.objects.all()[page*3:(page+1)*3+1].values()
    features = [{
        'description': f['description'], 
        'date': localtime_for_timezone(f['date'], user.profile.timezone).strftime("%b %d, %Y")
    } for f in features]
    return features

@ajax_login_required
@json.json_view
def save_feed_order(request):
    folders = request.POST.get('folders')
    if folders:
        # Test that folders can be JSON decoded
        folders_list = json.decode(folders)
        assert folders_list is not None
        logging.user(request, "~FBFeed re-ordering: ~SB%s folders/feeds" % (len(folders_list)))
        user_sub_folders = UserSubscriptionFolders.objects.get(user=request.user)
        user_sub_folders.folders = folders
        user_sub_folders.save()
    
    return {}

@json.json_view
def feeds_trainer(request):
    classifiers = []
    feed_id = request.REQUEST.get('feed_id')
    user = get_user(request)
    usersubs = UserSubscription.objects.filter(user=user, active=True)
    if feed_id:
        feed = get_object_or_404(Feed, pk=feed_id)
        usersubs = usersubs.filter(feed=feed)
    usersubs = usersubs.select_related('feed').order_by('-feed__stories_last_month')
                
    for us in usersubs:
        if (not us.is_trained and us.feed.stories_last_month > 0) or feed_id:
            classifier = dict()
            classifier['classifiers'] = get_classifiers_for_user(user, us.feed.pk)
            classifier['feed_id'] = us.feed.pk
            classifier['stories_last_month'] = us.feed.stories_last_month
            classifier['num_subscribers'] = us.feed.num_subscribers
            classifier['feed_tags'] = json.decode(us.feed.data.popular_tags) if us.feed.data.popular_tags else []
            classifier['feed_authors'] = json.decode(us.feed.data.popular_authors) if us.feed.data.popular_authors else []
            classifiers.append(classifier)
    
    logging.user(user, "~FGLoading Trainer: ~SB%s feeds" % (len(classifiers)))
    
    return classifiers

@ajax_login_required
@json.json_view
def save_feed_chooser(request):
    approved_feeds = [int(feed_id) for feed_id in request.POST.getlist('approved_feeds') if feed_id][:64]
    activated = 0
    usersubs = UserSubscription.objects.filter(user=request.user)
    
    for sub in usersubs:
        try:
            if sub.feed.pk in approved_feeds:
                sub.active = True
                activated += 1
                sub.save()
                sub.feed.count_subscribers()
            elif sub.active:
                sub.active = False
                sub.save()
        except Feed.DoesNotExist:
            pass
            
    
    logging.user(request, "~BB~FW~SBActivated standard account: ~FC%s~SN/~SB%s" % (
        activated, 
        usersubs.count()
    ))
    request.user.profile.queue_new_feeds()
    request.user.profile.refresh_stale_feeds(exclude_new=True)

    return {'activated': activated}

@ajax_login_required
def retrain_all_sites(request):
    for sub in UserSubscription.objects.filter(user=request.user):
        sub.is_trained = False
        sub.save()
        
    return feeds_trainer(request)
    
@login_required
def activate_premium_account(request):
    try:
        usersubs = UserSubscription.objects.select_related('feed').filter(user=request.user)
        for sub in usersubs:
            sub.active = True
            sub.save()
            if sub.feed.premium_subscribers <= 0:
                sub.feed.count_subscribers()
                sub.feed.schedule_feed_fetch_immediately()
    except Exception, e:
        subject = "Premium activation failed"
        message = "%s -- %s\n\n%s" % (request.user, usersubs, e)
        mail_admins(subject, message, fail_silently=True)
        
    request.user.profile.is_premium = True
    request.user.profile.save()
        
    return HttpResponseRedirect(reverse('index'))

@login_required
def login_as(request):
    if not request.user.is_staff:
        logging.user(request, "~SKNON-STAFF LOGGING IN AS ANOTHER USER!")
        assert False
        return HttpResponseForbidden()
    username = request.GET['user']
    user = get_object_or_404(User, username__iexact=username)
    user.backend = settings.AUTHENTICATION_BACKENDS[0]
    login_user(request, user)
    return HttpResponseRedirect(reverse('index'))
    
def iframe_buster(request):
    logging.user(request, "~FB~SBiFrame bust!")
    return HttpResponse(status=204)
    
@ajax_login_required
@json.json_view
def mark_story_as_starred(request):
    code     = 1
    feed_id  = int(request.POST['feed_id'])
    story_id = request.POST['story_id']
    
    story = MStory.objects(story_feed_id=feed_id, story_guid=story_id).limit(1)
    if story:
        story_db = dict([(k, v) for k, v in story[0]._data.items() 
                                if k is not None and v is not None])
        now = datetime.datetime.now()
        story_values = dict(user_id=request.user.pk, starred_date=now, **story_db)
        MStarredStory.objects.create(**story_values)
        logging.user(request, "~FCStarring: ~SB%s" % (story[0].story_title[:50]))
    else:
        code = -1
    
    return {'code': code}
    
@ajax_login_required
@json.json_view
def mark_story_as_unstarred(request):
    code     = 1
    story_id = request.POST['story_id']
    
    starred_story = MStarredStory.objects(user_id=request.user.pk, story_guid=story_id)
    if starred_story:
        logging.user(request, "~FCUnstarring: ~SB%s" % (starred_story[0].story_title[:50]))
        starred_story.delete()
    else:
        code = -1
    
    return {'code': code}

@ajax_login_required
@json.json_view
def send_story_email(request):
    code       = 1
    message    = 'OK'
    story_id   = request.POST['story_id']
    feed_id    = request.POST['feed_id']
    to_address = request.POST['to']
    from_name  = request.POST['from_name']
    from_email = request.POST['from_email']
    comments   = request.POST['comments']
    comments   = comments[:2048] # Separated due to PyLint
    from_address = 'share@newsblur.com'

    if not email_re.match(to_address):
        code = -1
        message = 'You need to send the email to a valid email address.'
    elif not email_re.match(from_email):
        code = -1
        message = 'You need to provide your email address.'
    elif not from_name:
        code = -1
        message = 'You need to provide your name.'
    else:
        story   = MStory.objects(story_feed_id=feed_id, story_guid=story_id)[0]
        story   = Feed.format_story(story, feed_id, text=True)
        feed    = Feed.objects.get(pk=story['story_feed_id'])
        text    = render_to_string('mail/email_story_text.xhtml', locals())
        html    = render_to_string('mail/email_story_html.xhtml', locals())
        subject = "%s is sharing a story with you: \"%s\"" % (from_name, story['story_title'])
        subject = subject.replace('\n', ' ')
        msg     = EmailMultiAlternatives(subject, text, 
                                         from_email='NewsBlur <%s>' % from_address,
                                         to=[to_address], 
                                         cc=['%s <%s>' % (from_name, from_email)],
                                         headers={'Reply-To': '%s <%s>' % (from_name, from_email)})
        msg.attach_alternative(html, "text/html")
        msg.send()
        logging.user(request, '~BMSharing story by email: ~FY~SB%s~SN~BM~FY/~SB%s' % 
                                   (story['story_title'][:50], feed.feed_title[:50]))
        
    return {'code': code, 'message': message}

@json.json_view
def load_tutorial(request):
    if request.REQUEST.get('finished'):
        logging.user(request, '~BY~FW~SBFinishing Tutorial')
        return {}
    else:
        newsblur_feed = Feed.objects.filter(feed_address__icontains='blog.newsblur.com').order_by('-pk')[0]
        logging.user(request, '~BY~FW~SBLoading Tutorial')
        return {
            'newsblur_feed': newsblur_feed.canonical()
        }