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1 """
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2 Views for the podcast application.
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3
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4 """
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5 import os.path
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6 from urlparse import urlparse
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7
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8 from django.shortcuts import render_to_response
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9 from django.template import RequestContext
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10 from django.shortcuts import get_object_or_404
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11 import django.utils.simplejson as json
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12
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13 from podcast.models import Channel
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14 from podcast.models import Item
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15
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16
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17 def get_ext_from_url(url):
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18 """
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19 This function returns the extension part of the path from the given
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20 url.
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21 """
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22 ext = os.path.splitext(urlparse(url).path)[1]
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23 if ext.startswith('.'):
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24 ext = ext[1:]
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25 return ext
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26
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27
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28 def jplayer_params(ext, url, alt_ext, alt_url):
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29 """
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30 Compute and returns a 2-tuple: (jplayer_media, jplayer_supplied)
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31 where
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32 jplayer_media: a string representation of the JSON for the
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33 jplayer setMedia parameter
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34 jplayer_supplied: the string for the jplayer supplied parameter
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35
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36 media_list is an input list or tuple of 2-tuples of the form
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37 (media_type, url)
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38 where media_type is e.g. mp3, m4a, ogg, etc.
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39
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40 """
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41 media = dict([(ext, url)])
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42 if alt_ext and alt_url:
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43 media[alt_ext] = alt_url
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44
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45 # prefer mp4 to mp3
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46 if alt_ext is None:
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47 supplied = [ext]
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48 elif ext == "m4a":
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49 supplied = (ext, alt_ext)
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50 else:
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51 supplied = (alt_ext, ext)
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52
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53 supplied = ", ".join(supplied)
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54
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55 return json.dumps(media), supplied
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56
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57
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58 def index(request):
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59 try:
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60 channel = Channel.objects.get(pk=1)
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61 except Channel.DoesNotExist:
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62 channel = None
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63
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64 return render_to_response('podcast/index.html', {
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65 'channel': channel,
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66 },
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67 context_instance = RequestContext(request))
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68
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69
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70 def detail(request, id):
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71 podcast = get_object_or_404(Item.objects.select_related(), pk = id)
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72
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73 ext = get_ext_from_url(podcast.enclosure_url)
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74 alt_ext = None
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75 if podcast.alt_enclosure_url:
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76 alt_ext = get_ext_from_url(podcast.alt_enclosure_url)
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77
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78 jplayer_media, jplayer_supplied = jplayer_params(ext, podcast.enclosure_url,
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79 alt_ext, podcast.alt_enclosure_url)
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80
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81 return render_to_response('podcast/detail.html', {
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82 'channel': podcast.channel,
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83 'podcast': podcast,
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84 'ext': ext,
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85 'alt_ext': alt_ext,
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86 'jplayer_media': jplayer_media,
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87 'jplayer_supplied': jplayer_supplied,
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88 },
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89 context_instance = RequestContext(request))
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90
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91
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92 def feed(request):
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93 try:
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94 channel = Channel.objects.get(pk=1)
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95 except Channel.DoesNotExist:
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96 channel = None
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97 return render_to_response('podcast/feed.xml', {
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98 'channel': channel,
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99 },
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100 context_instance = RequestContext(request))
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