lbry-desktop/js/app.js

var appStyles = {
  width: '800px',
  marginLeft: 'auto',
  marginRight: 'auto',
};
var App = React.createClass({
  getInitialState: function() {
    var query = window.location.search.slice(1);
    if (['settings', 'help', 'start'].indexOf(query) != -1) {
      var viewingPage = query;
    } else {
      var viewingPage = 'home';
    }

    return {
      viewingPage: viewingPage
    };
  },
  componentWillMount: function() {
    lbry.checkNewVersionAvailable(function(isAvailable) {
      if (isAvailable) {
        var message = "The version of LBRY you're using is not up to date.\n\n" +
                      "You'll now be taken to lbry.io, where you can download the latest version.";

        lbry.getVersionInfo(function(versionInfo) {
          var maj, min, patch;
          [maj, min, patch] = versionInfo.lbrynet_version.split('.');

          if (versionInfo.os_system == 'Darwin' && maj == 0 && min <= 2 && patch <= 2) {
            // On OS X with version <= 0.2.2, we need to notify user to close manually close LBRY
            message += "\n\nBefore installing the new version, make sure to exit LBRY, if you started the app " +
                        "click that LBRY icon in your status bar and choose \"Quit.\"";
          } else {
            lbry.stop();
          }

          alert(message);
          window.location = "http://www.lbry.io/" + (versionInfo.os_system == 'Darwin' ? 'osx' : 'linux');
        });
      }
    });
  },
  componentDidMount: function() {
    lbry.getStartNotice(function(notice) {
      if (notice) {
        alert(notice);
      }
    });
  },
  render: function() {
    if (this.state.viewingPage == 'home') {
      var content = <HomePage />;
    } else if (this.state.viewingPage == 'settings') {
      var content = <SettingsPage />;
    } else if (this.state.viewingPage == 'help') {
      var content = <HelpPage />;
    } else if (this.state.viewingPage == 'start') {
      var content = <StartPage />;
    }
    return (
      <div style={appStyles}>
        {content}
      </div>
    );
  }
});