
-- libquvi-scripts
-- Copyright (C) 2011  Bastien Nocera <hadess@hadess.net>
--
-- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
--
-- This library is free software; you can redistribute it and/or
-- modify it under the terms of the GNU Lesser General Public
-- License as published by the Free Software Foundation; either
-- version 2.1 of the License, or (at your option) any later version.
--
-- This library is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-- Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public
-- License along with this library; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-- 02110-1301  USA

local Soundcloud = {} -- Utility functions unique to this script

-- Identify the script.
function ident(self)
    package.path = self.script_dir .. '/?.lua'
    local C      = require 'quvi/const'
    local r      = {}
    r.domain     = "soundcloud%.com"
    r.formats    = "default"
    r.categories = C.proto_http
    local U      = require 'quvi/util'
    r.handles    = U.handles(self.page_url,
                    {r.domain}, {"/.+/.+$", "/player.swf"})
    return r
end

-- Query available formats.
function query_formats(self)
    self.formats = 'default'
    return self
end

-- Parse media URL.
function parse(self)
    self.host_id = "soundcloud"
    Soundcloud.normalize(self)

    local p = quvi.fetch(self.page_url)
    local m = p:match("window%.SC%.bufferTracks%.push(%(.-%);)")
                or error("no match: metadata")

    self.id = m:match('"uid":"(%w-)"') or error("no match: media id")

    self.thumbnail_url = ''
    self.title = nil -- Ugly but works.
    for c,p in p:gmatch('<meta content="(.-)" property="(.-)"') do
        if p == 'og:title' then
            self.title = c
        elseif p == 'og:image' then
            if not c:find('placeholder%.png') then
                self.thumbnail_url = c
            end
        end
    end

    self.title = self.title or error("no match: media title")
    self.duration = tonumber(m:match('"duration":(%d-),')) or 0

    local s  = m:match('"streamUrl":"(.-)"') or error("no match: media URL")
    self.url = {s}

    return self
end

--
-- Utility functions
--

function Soundcloud.normalize(self) -- "Normalize" an embedded URL
    local url = self.page_url:match('swf%?url=(.-)$')
    if not url then return end

    local U = require 'quvi/util'
    local oe_url = string.format(
        'http://soundcloud.com/oembed?url=%s&format=json', U.unescape(url))

    local s = quvi.fetch(oe_url):match('href=\\"(.-)\\"')
    self.page_url = s or error('no match: page url')
end

-- vim: set ts=4 sw=4 tw=72 expandtab:
