superfeedr.jquery.js

(function($) {

  var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",encode:function(e){var t="";var n,r,i,s,o,u,a;var f=0;e=Base64._utf8_encode(e);while(f<e.length){n=e.charCodeAt(f++);r=e.charCodeAt(f++);i=e.charCodeAt(f++);s=n>>2;o=(n&3)<<4|r>>4;u=(r&15)<<2|i>>6;a=i&63;if(isNaN(r)){u=a=64}else if(isNaN(i)){a=64}t=t+this._keyStr.charAt(s)+this._keyStr.charAt(o)+this._keyStr.charAt(u)+this._keyStr.charAt(a)}return t},decode:function(e){var t="";var n,r,i;var s,o,u,a;var f=0;e=e.replace(/[^A-Za-z0-9\+\/\=]/g,"");while(f<e.length){s=this._keyStr.indexOf(e.charAt(f++));o=this._keyStr.indexOf(e.charAt(f++));u=this._keyStr.indexOf(e.charAt(f++));a=this._keyStr.indexOf(e.charAt(f++));n=s<<2|o>>4;r=(o&15)<<4|u>>2;i=(u&3)<<6|a;t=t+String.fromCharCode(n);if(u!=64){t=t+String.fromCharCode(r)}if(a!=64){t=t+String.fromCharCode(i)}}t=Base64._utf8_decode(t);return t},_utf8_encode:function(e){e=e.replace(/\r\n/g,"\n");var t="";for(var n=0;n<e.length;n++){var r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r)}else if(r>127&&r<2048){t+=String.fromCharCode(r>>6|192);t+=String.fromCharCode(r&63|128)}else{t+=String.fromCharCode(r>>12|224);t+=String.fromCharCode(r>>6&63|128);t+=String.fromCharCode(r&63|128)}}return t},_utf8_decode:function(e){var t="";var n=0;var r=c1=c2=0;while(n<e.length){r=e.charCodeAt(n);if(r<128){t+=String.fromCharCode(r);n++}else if(r>191&&r<224){c2=e.charCodeAt(n+1);t+=String.fromCharCode((r&31)<<6|c2&63);n+=2}else{c2=e.charCodeAt(n+1);c3=e.charCodeAt(n+2);t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);n+=3}}return t}}

  $.superfeedr = {
    options: {
      login: '',
      key: '',
    },

    Feed: function(feed) {

      var count = 5;
      var format = 'json';


      // Google Feed API compatibility
      this.setNumEntries = function setNumEntries(num) {
        count = parseInt(num) || 5;
        return count;
      }

      // Google Feed API compatibility
      this.setResultFormat = function setResultFormat(_format) {
        if(_format == 'json')
          format = 'json'
        else if(_format == 'atom')
          format = 'atom'
        return format;
      }

      // Google Feed API compatibility
      this.includeHistoricalEntries = function includeHistoricalEntries() {
        return true; // True all the time.
      }

      // Loads the content of feed.
      // Accepts options as first argument, or a callback directly.
      // options include
      // - count (default: 5), can be set using setNumEntries
      // - format (default: 'json'), can be set using setResultFormat ('json' or 'atom')
      // - stream (default: false), uses EventSource to maintain connection option and handle upcoming entries. Only works with 'json' data format.
      this.load = function loadFeed(opts, cb) {
        if(typeof(opts) == 'function')
          cb = opts;
        if(!opts || typeof(opts) != 'object')
          opts = {};

        var host = 'push.superfeedr.com'; 

        if(opts.count)
          this.setNumEntries(opts.count);

        if(opts.format)
          this.setResultFormat(opts.format);

        var qs = jQuery.param({
          'hub.mode': 'retrieve',
          'hub.topic': feed,
          'format': format,
          'authorization': Base64.encode($.superfeedr.options.login + ':' + $.superfeedr.options.key),
          'count': count
        });

        var url = ['//' + host + '/', qs].join('?');

        var req = $.ajax({
          url: url,
          dataType: "jsonp",
          jsonp: "callback",
         });

        req.done(function(data, textStatus, r) {
          if(data.error) {
            return cb(data);
          }
          return cb({feed: data});
        });
        return req;
      }

      this.stream = function streamFeed(opts, cb) {
        if(typeof(opts) == 'function')
          cb = opts;
        if(!opts || typeof(opts) != 'object')
          opts = {};

        var host = 'stream.superfeedr.com'; 

        if(opts.count)
          this.setNumEntries(opts.count);

        this.setResultFormat('json');

        var qs = jQuery.param({
          'hub.mode': 'retrieve',
          'hub.topic': feed,
          'format': 'json',
          'authorization': Base64.encode($.superfeedr.options.login + ':' + $.superfeedr.options.key),
          'count': count
        });

        var url = ['//' + host + '/', qs].join('?');

        var source = new EventSource(url);

        source.onopen = function () {
          if(typeof(opts.ready) == 'function')
            return opts.ready();
        };

        source.addEventListener("notification", function(e) {
          if(e.data)
            return cb({feed: JSON.parse(e.data)});
        });
      }
    }
  };

}(jQuery));