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 program is free software: you can redistribute it and/or
   7 -- modify it under the terms of the GNU Affero General Public
   8 -- License as published by the Free Software Foundation, either
   9 -- version 3 of the License, or (at your option) any later version.
  10 --
  11 -- This program 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
  14 -- GNU Affero General Public License for more details.
  15 --
  16 -- You should have received a copy of the GNU Affero General
  17 -- Public License along with this program.  If not, see
  18 -- <http://www.gnu.org/licenses/>.
  19 --
  20
  21 --
  22 -- NOTE
  23 --
  24 -- academicearth.org hosts media at blip.tv or youtube.com .
  25 -- Set "goto_url" to point to the actual location of the media.
  26 --
  27 -- The library will then relay the new URL to a media script that
  28 -- accepts it.
  29 --
  30
  31 local AcademicEarth = {} -- Utility functions specific to this script
  32
  33 -- Identify the media script.
  34 function ident(qargs)
  35   return {
  36     can_parse_url = AcademicEarth.can_parse_url(qargs),
  37     domains = table.concat({'academicearth.org'}, ',')
  38   }
  39 end
  40
  41 -- Parse media properties.
  42 function parse(qargs)
  43   return AcademicEarth.to_media_url(qargs)
  44 end
  45
  46 --
  47 -- Utility functions
  48 --
  49
  50 function AcademicEarth.can_parse_url(qargs)
  51   local U = require 'socket.url'
  52   local t = U.parse(qargs.input_url)
  53   if t and t.scheme and t.scheme:lower():match('^http$')
  54        and t.host   and t.host:lower():match('academicearth%.org$')
  55        and t.path   and t.path:lower():match('^/lectures/')
  56   then
  57     return true
  58   else
  59     return false
  60   end
  61 end
  62
  63 function AcademicEarth.to_media_url(qargs)
  64   local p = quvi.fetch(qargs.input_url)
  65   local s = p:match('id="idPlayer".-src="(.-youtube%.com/.-)"')
  66   if s then -- hosted at youtube?
  67     qargs.goto_url = s
  68   else -- hosted at blip?
  69     qargs.goto_url = p:match('embed src="(.-)"')
  70                       or error('no match: unrecognized media source')
  71   end
  72   return qargs
  73 end
  74
  75 -- vim: set ts=2 sw=2 tw=72 expandtab: