mygpo/web/templatetags/episodes.py

   1 from django import template
   2 from django.utils.safestring import mark_safe
   3 from django.utils.translation import ugettext as _
   4
   5 from mygpo import utils
   6 from mygpo.data.mimetypes import get_type, get_mimetype
   7
   8 register = template.Library()
   9
  10 @register.filter
  11 def episode_status_text(episode):
  12     if not episode or not episode.action:
  13         return ''
  14
  15     if episode.action == 'new':
  16         return _('New episode')
  17     elif episode.action == 'download':
  18         if episode.device.name:
  19             return _('Downloaded to %s') % episode.device.name
  20         else:
  21             return _('Downloaded')
  22     elif episode.action == 'play':
  23         if episode.device.name:
  24             return _('Played on %s') % episode.device.name
  25         else:
  26             return _('Played')
  27     elif episode.action == 'delete':
  28         if episode.device.name:
  29             return _('Deleted on %s') % episode.device.name
  30         else:
  31             return _('Deleted')
  32
  33     return _('Unknown status')
  34
  35 @register.filter
  36 def episode_status_icon(action):
  37     if not action or not action.action:
  38         s = '<img src="/media/nothing.png" alt="nothing" title="%s" />' % _('Unplayed episode')
  39
  40     else:
  41         date_string   = (_(' on %s') % (action.timestamp)) if action.timestamp else ''
  42         device_string = (_(' on %s') % (action.device.name)) if action.device else ''
  43
  44         if action.action == 'new':
  45             s = '<img src="/media/new.png" alt="new" title="%s" />' % ('%s%s%s' % (_('This episode has been marked new'),date_string, device_string))
  46         elif action.action == 'download':
  47             s = '<img src="/media/download.png" alt="downloaded" title="%s" />' % ('%s%s%s' % (_('This episode has been downloaded'),date_string, device_string))
  48         elif action.action == 'play':
  49             if action.playmark is not None:
  50                 if action.started is not None:
  51                     playback_info = _(' from %(start)s to %(end)s') % { \
  52                             'start': utils.format_time(action.started), \
  53                             'end': utils.format_time(action.playmark)}
  54                 else:
  55                     playback_info = _(' to position %s') % (\
  56                             utils.format_time(action.playmark),)
  57             else:
  58                 playback_info = ''
  59             s = '<img src="/media/playback.png" alt="played" title="%s" />' % ('%s%s%s%s' % (_('This episode has been played'),date_string, device_string, playback_info))
  60         elif action.action == 'delete':
  61             s = '<img src="/media/delete.png" alt="deleted" title="%s"/>' % ('%s%s%s' % (_('This episode has been deleted'),date_string, device_string))
  62         else:
  63             return action.action #this is not marked safe by intention
  64
  65     return mark_safe(s)
  66
  67
  68 @register.filter
  69 def played_visualization(played_parts, length):
  70     """
  71     displays a visualization of played parts of an episode using the
  72     Google Chart API.
  73
  74     played_parts is expected as a list of the length of the alternativing
  75     unplayed and played parts as generated by mygpo.web.utils.get_played_parts()
  76     """
  77     narrow_pos_limit = 15
  78
  79     axis_pos = []
  80     axis_label = []
  81     last_p = 0
  82     for p in played_parts:
  83         last_p += p
  84         if p < narrow_pos_limit:
  85             continue
  86         axis_pos.append(last_p)
  87         axis_label.append(utils.format_time(last_p))
  88
  89
  90     parts = [
  91         'cht=bhs',                      #bar chart
  92         'chco=C6D9FD,4D89F9',           #colors alternating between light (unplayed) and dark (played) blue
  93         'chs=760x50',                   #width corresponds to length, arbitrary height
  94         'chds=0,%s' % length,           #axis scaling from 0 to maximum duration
  95         'chd=t:%s' % '|'.join([repr(x) for x in played_parts]),     #alternating blocks; value corresponds to length
  96         'chxt=x',                       #visible axes
  97         'chxr=0,0,%s' % length,         #axis range for axis 0 (x): 0 - length
  98         'chxl=0:|%s' % '|'.join(axis_label),                        #axis labels
  99         'chxp=0,%s' % ','.join([repr(x) for x in axis_pos]),        #axis label positions
 100         ]
 101
 102     s = '<img src="http://chart.apis.google.com/chart?%s"' % '&'.join(parts)
 103
 104     return mark_safe(s)
 105
 106
 107 @register.filter
 108 def is_image(episode):
 109
 110     mimetype = get_mimetype(episode.mimetype, episode.url)
 111     return get_type(mimetype) == 'image'
 112