share/media/academicearth.lua

   1 -- libquvi-scripts
   2 -- Copyright (C) 2010-2012  Toni Gundogdu <legatvs@gmail.com>
   3 --
   4 -- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
   5 --
   6 -- This library is free software; you can redistribute it and/or
   7 -- modify it under the terms of the GNU Lesser General Public
   8 -- License as published by the Free Software Foundation; either
   9 -- version 2.1 of the License, or (at your option) any later version.
  10 --
  11 -- This library is distributed in the hope that it will be useful,
  12 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 -- Lesser General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Lesser General Public
  17 -- License along with this library; if not, write to the Free Software
  18 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 -- 02110-1301  USA
  20 --
  21
  22 --
  23 -- NOTE
  24 --
  25 -- academicearth.org hosts media at blip.tv or youtube.com .
  26 -- Set "goto_url" to point to the actual location of the media.
  27 --
  28 -- The library will then relay the new URL to a media script that
  29 -- accepts it.
  30 --
  31
  32 local AcademicEarth = {} -- Utility functions specific to this script
  33
  34 -- Identify the media script.
  35 function ident(qargs)
  36   return {
  37     can_parse_url = AcademicEarth.can_parse_url(qargs),
  38     domains = table.concat({'academicearth.org'}, ',')
  39   }
  40 end
  41
  42 -- Parse media properties.
  43 function parse(qargs)
  44   return AcademicEarth.to_media_url(qargs)
  45 end
  46
  47 --
  48 -- Utility functions
  49 --
  50
  51 function AcademicEarth.can_parse_url(qargs)
  52   local U = require 'socket.url'
  53   local t = U.parse(qargs.input_url)
  54   if t and t.scheme and t.scheme:lower():match('^http$')
  55        and t.host   and t.host:lower():match('academicearth%.org$')
  56        and t.path   and t.path:lower():match('^/lectures/')
  57   then
  58     return true
  59   else
  60     return false
  61   end
  62 end
  63
  64 function AcademicEarth.to_media_url(qargs)
  65   local p = quvi.fetch(qargs.input_url)
  66   local s = p:match('id="idPlayer".-src="(.-youtube%.com/.-)"')
  67   if s then -- hosted at youtube?
  68     qargs.goto_url = s
  69   else -- hosted at blip?
  70     qargs.goto_url = p:match('embed src="(.-)"')
  71                       or error('no match: unrecognized media source')
  72   end
  73   return qargs
  74 end
  75
  76 -- vim: set ts=2 sw=2 tw=72 expandtab: