Amarok Script to synchronise with podcast subscription service - OPML

[Greg Chrystall]

Hi List,

The following is a script i whipped together to synchronise Podnova podcast
subscriptions with Amarok. It uses the podnova OPML Url, one problem is that
I can not get a list of podcasts already subscribed to through DCOP, so it
pops up warnings, that the podcasts have already been subscribed to in
Amarok whenever the script runs...

I have attached the tar.bz2 package, and the source is below, not sure on
what the process for distribution is...

Cheers,

Greg


podnovasync_conf.rb:

#!/usr/bin/ruby
$:.unshift File.join(File.dirname(__FILE__))
require 'Korundum'
require 'net/http'

class PodnovaOpmlConfig < Qt::Widget

    slots 'testUrl()', 'saveUrl()'
    attr_reader :lineEdit1
    attr_reader :testButton
    attr_reader :saveButton
    attr_reader :resultText
    attr_reader :inputLabel


    def initialize(parent = nil, name = nil, fl = 0)
        super

        if name.nil?
            setName("PodnovaOpmlConfig")
        end

        @podNovaUrl = ""

        @lineEdit1 = Qt::LineEdit.new(self, "lineEdit1")
        @lineEdit1.setGeometry( Qt::Rect.new(160, 50, 270, 22) )

        @testButton = Qt::PushButton.new(self, "testButton")
        @testButton.setGeometry( Qt::Rect.new(450, 50, 70, 24) )

        @saveButton = Qt::PushButton.new(self, "saveButton")
        @saveButton.setGeometry( Qt::Rect.new(410, 270, 112, 24) )

        @resultText = Qt::TextView.new(self, "resultText")
        @resultText.setGeometry( Qt::Rect.new(50, 90, 451, 161) )

        @inputLabel = Qt::Label.new(self, "inputLabel")
        @inputLabel.setGeometry( Qt::Rect.new(20, 50, 120, 20) )

        connect( @testButton, SIGNAL('clicked()'), self, SLOT( 'testUrl()' )
)
        connect( @saveButton, SIGNAL('clicked()'), self, SLOT( 'saveUrl()' )
)

        languageChange()
        resize( Qt::Size.new(568, 320).expandedTo(minimumSizeHint()) )
        clearWState( WState_Polished )
    end

    def testUrl
        @podNovaUrl = @lineEdit1.text()
        Thread.new(@podNovaUrl) { |myPage|
            req = Net::HTTP.get_response(URI.parse(myPage))
            @resultText.setText(req.body)
        }
    end

    def saveUrl
        conf_file = File.open("./synpodnova.conf", "w")
        conf_file.truncate(0)
        conf_file.write("opmlUrl=" + @podNovaUrl + "\n")
        conf_file.close
        Qt::Application.exit( 0 )
    end

    #
    #  Sets the strings of the subwidgets using the current
    #  language.
    #
    def languageChange()
        setCaption(trUtf8("Podnova OPML Sync Config"))
        @testButton.setText( trUtf8("Test") )
        @testButton.setAccel(Qt::KeySequence.new(nil))
        @saveButton.setText( trUtf8("S&ave") )
        @saveButton.setAccel( Qt::KeySequence.new(trUtf8("Alt+A")) )
        @inputLabel.setText( trUtf8("Podnova OPML URL") )
        Qt::ToolTip.add( @inputLabel, nil )
    end
    protected :languageChange


end



podnovasyn.rb:

#!/usr/bin/ruby
$:.unshift File.join(File.dirname(__FILE__))
require 'podnovasync_conf.rb'
require 'net/http'
require 'rexml/document'

begin
require 'logger'
require 'Korundum'

rescue LoadError
    error="Korundum is required for this script, please install it."
    `kdialog --sorry '#{error}'`
    exit
end

class PodnovaSync
    SYNC_INTERVAL = 60
    def initialize
        trap( "SIGTERM" ) {
            cleanup()
        }
        trap("SIGINT"){
            cleanup()
        }
        @log = Logger.new("./podnova_sync.log")
        KDE::CmdLineArgs.init(ARGV, KDE::AboutData.new("chwallpaper",
"Change wallpaper", "0.1"))
        @kde_application = KDE::Application.new()
        @dcopclient = KDE::DCOPClient.new
        @dcopclient.attach
        @dcopclient.registerAs("PodnovaSync",false)
        @amarok_playlist_browser = KDE::DCOPRef.new('amarok',
'playlistbrowser')
        @amarok_playlist_browser.setDCOPClient(@dcopclient)
        @config_done = false

    end

    def cleanup()
            @log.debug( "Recieved SIGTERM, cleanup and close." )
            exit
    end

    def do_configuration
        if !@config_done
            @config_done = true
            config = PodnovaOpmlConfig.new()
            @kde_application.setMainWidget(config)
            config.show()
            @kde_application.exec()
        else
            error="Config has already run, please restart the script to run
it again."
            `kdialog --sorry '#{error}'`
        end
    end

    def sync_podcasts
        opml_url = get_config_value("opmlUrl")
        if !opml_url.nil?
            opml = Net::HTTP.get_response(URI.parse(opml_url)).body
            rss_xml_urls = get_rss_xml_urls(opml)
            rss_xml_urls.each do |url|
                @amarok_playlist_browser.addPodcast(url)
            end
            @amarok_playlist_browser.scanPodcasts()
        end
    end

    def get_rss_xml_urls(opml_string)
        url_list = []
        doc = REXML::Document.new opml_string
        REXML::XPath.each( doc, "/opml/body/outline/outline/@xmlUrl") {
|url| url_list << url.to_s }
        return url_list
    end

    def get_config_value(key)
        begin
            File.open("./synpodnova.conf", "r").each_line do |line|
                if line[key]
                    return line.split("=")[1].chomp
                end
            end
        rescue Exception
        end
        return nil
    end
    def run
        sync_podcasts
        @log.debug("Running...")
        syncThread = Thread.new(){
            loop do
                sync_podcasts
                sleep(SYNC_INTERVAL * 60)
            end
        }

        loop do
            message = gets().chomp() #Read message from stdin
            if(message == "configure")
                do_configuration()
            end
        end
        syncThread.join()
        @log.debug("Done.")
    end
end

PodnovaSync.new().run




-- 
Greg Chrystall
greg at chrystall.co.nz
+64 27 696 7464
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