catalogue/templatetags/catalogue_tags.py

   1 from collections import defaultdict
   2 from django import template
   3 from django.utils.datastructures import SortedDict
   4 from ..models import Lesson, Section
   5 from curriculum.models import Level, CurriculumCourse
   6 from librarian.dcparser import WLURI, Person
   7
   8 register = template.Library()
   9
  10
  11 @register.inclusion_tag("catalogue/snippets/carousel.html")
  12 def catalogue_carousel():
  13     return {
  14         "object_list": Section.objects.all()
  15     }
  16
  17 @register.inclusion_tag("catalogue/snippets/levels_main.html")
  18 def catalogue_levels_main():
  19     object_list = Level.objects.exclude(lesson=None)
  20     c = object_list.count()
  21     return {
  22         'object_list': object_list,
  23         'section_width': (700 - 20 * (c - 1)) / c,
  24     }
  25
  26
  27 @register.inclusion_tag("catalogue/snippets/level_box.html")
  28 def level_box(level):
  29     lessons = dict(
  30         synthetic = [],
  31         course = SortedDict(),
  32         project = [],
  33     )
  34     by_course = defaultdict(lambda: defaultdict(list))
  35
  36     lesson_lists = [alist for alist in [
  37         list(level.lesson_set.exclude(type='appendix').order_by('section__order')),
  38         list(level.lessonstub_set.all())
  39     ] if alist]
  40
  41     while lesson_lists:
  42         min_index, min_list = min(enumerate(lesson_lists), key=lambda x: x[1][0].order)
  43         lesson = min_list.pop(0)
  44         if not min_list:
  45             lesson_lists.pop(min_index)
  46
  47         if lesson.type == 'course':
  48             if lesson.section not in lessons['course']:
  49                 lessons['course'][lesson.section] = []
  50             lessons['course'][lesson.section].append(lesson)
  51         else:
  52             lessons[lesson.type].append(lesson)
  53
  54         if hasattr(lesson, 'curriculum_courses'):
  55             for course in lesson.curriculum_courses.all():
  56                 by_course[course][lesson.type].append(lesson)
  57
  58     courses = [(course, by_course[course]) for course in
  59         CurriculumCourse.objects.filter(lesson__level=level).distinct()]
  60
  61     return {
  62         "level": level,
  63         "lessons": lessons,
  64         "courses": courses,
  65     }
  66
  67 @register.inclusion_tag("catalogue/snippets/lesson_nav.html")
  68 def lesson_nav(lesson):
  69     if lesson.type == 'course':
  70         root = lesson.section
  71         siblings = Lesson.objects.filter(type='course', level=lesson.level, section=root)
  72     elif lesson.type == 'appendix':
  73         root = None
  74         siblings = Lesson.objects.filter(type=lesson.type)
  75     else:
  76         root = None
  77         siblings = Lesson.objects.filter(type=lesson.type, level=lesson.level)
  78     return {
  79         "lesson": lesson,
  80         "root": root,
  81         "siblings": siblings,
  82     }
  83
  84 @register.inclusion_tag("catalogue/snippets/lesson_link.html")
  85 def lesson_link(uri):
  86     try:
  87         return {'lesson': Lesson.objects.get(slug=WLURI(uri).slug)}
  88     except Lesson.DoesNotExist:
  89         return {}
  90
  91 @register.filter
  92 def person_list(persons):
  93     return u", ".join(Person.from_text(p).readable() for p in persons)
  94
  95
  96 # FIXME: Move to fnpdjango
  97 import feedparser
  98 import datetime
  99 @register.inclusion_tag('catalogue/latest_blog_posts.html')
 100 def latest_blog_posts(feed_url, posts_to_show=5):
 101     try:
 102         feed = feedparser.parse(str(feed_url))
 103         posts = []
 104         for i in range(posts_to_show):
 105             pub_date = feed['entries'][i].updated_parsed
 106             published = datetime.date(pub_date[0], pub_date[1], pub_date[2] )
 107             posts.append({
 108                 'title': feed['entries'][i].title,
 109                 'summary': feed['entries'][i].summary,
 110                 'link': feed['entries'][i].link,
 111                 'date': published,
 112                 })
 113         return {'posts': posts}
 114     except:
 115         return {'posts': []}