Merge pull request #350 from inthepoche/rss

add atom feeds for unread / favs

1 files changed, 170 insertions, 169 deletions

diff --git a/inc/3rdparty/feedwriter/FeedWriter.php b/inc/3rdparty/feedwriter/FeedWriter.php
index d5d6648a..46ecc3d5 100644
--- a/inc/3rdparty/feedwriter/FeedWriter.php
+++ b/inc/3rdparty/feedwriter/FeedWriter.php
@@ -1,16 +1,16 @@
 <?php
-define('RSS2', 1, true);
-define('JSON', 2, true);
-define('ATOM', 3, true);
+// RSS 0.90  Officially obsoleted by 1.0
+// RSS 0.91, 0.92, 0.93 and 0.94  Officially obsoleted by 2.0
+// So, define constants for RSS 1.0, RSS 2.0 and ATOM   
+
+        define('RSS1', 'RSS 1.0', true);
+        define('RSS2', 'RSS 2.0', true);
+        define('ATOM', 'ATOM', true);
 
  /**
  * Univarsel Feed Writer class
  *
- * Genarate RSS2 or JSON (original: RSS 1.0, RSS2.0 and ATOM Feed)
- *
- * Modified for FiveFilters.org's Full-Text RSS project
- * to allow for inclusion of hubs, JSON output. 
- * Stripped RSS1 and ATOM support.
+ * Genarate RSS 1.0, RSS2.0 and ATOM Feed
  *                             
  * @package     UnivarselFeedWriter
  * @author      Anis uddin Ahmad <anisniit@gmail.com>
@@ -18,21 +18,17 @@ define('ATOM', 3, true);
  */
  class FeedWriter
  {
-         private $self          = null;     // self URL - http://feed2.w3.org/docs/warning/MissingAtomSelfLink.html
-         private $hubs          = array();  // PubSubHubbub hubs
          private $channels      = array();  // Collection of channel elements
          private $items         = array();  // Collection of items as object of FeedItem class.
          private $data          = array();  // Store some other version wise data
          private $CDATAEncoding = array();  // The tag names which have to encoded as CDATA
-         private $xsl                   = null;         // stylesheet to render RSS (used by Chrome)
-         private $json                  = null;         // JSON object
          
          private $version   = null; 
         
         /**
         * Constructor
         * 
-        * @param    constant    the version constant (RSS2 or JSON).       
+        * @param    constant    the version constant (RSS1/RSS2/ATOM).       
         */ 
         function __construct($version = RSS2)
         {       
@@ -43,11 +39,7 @@ define('ATOM', 3, true);
                 $this->channels['link']         = 'http://www.ajaxray.com/blog';
                                 
                 //Tag names to encode in CDATA
-                $this->CDATAEncoding = array('description', 'content:encoded', 'content', 'subtitle', 'summary');
-        }
-        
-        public function setFormat($format) {
-                $this->version = $format;
+                $this->CDATAEncoding = array('description', 'content:encoded', 'summary');
         }
 
         // Start # public functions ---------------------------------------------
@@ -82,26 +74,19 @@ define('ATOM', 3, true);
         }
         
         /**
-        * Genarate the actual RSS/JSON file
+        * Genarate the actual RSS/ATOM file
         * 
         * @access   public
         * @return   void
         */ 
         public function genarateFeed()
         {
-                if ($this->version == RSS2) {
-                        header('Content-type: text/xml; charset=UTF-8');
-                } elseif ($this->version == JSON) {
-                        header('Content-type: application/json; charset=UTF-8');
-                        $this->json = new stdClass();
-                }
+                header("Content-type: text/xml");
+                
                 $this->printHead();
                 $this->printChannels();
                 $this->printItems();
                 $this->printTale();
-                if ($this->version == JSON) {
-                        echo json_encode($this->json);
-                }
         }
         
         /**
@@ -128,6 +113,7 @@ define('ATOM', 3, true);
                 $this->items[] = $feedItem;    
         }
         
+        
         // Wrapper functions -------------------------------------------------------------------
         
         /**
@@ -143,42 +129,6 @@ define('ATOM', 3, true);
         }
         
         /**
-        * Add a hub to the channel element
-        * 
-        * @access   public
-        * @param    string URL
-        * @return   void
-        */
-        public function addHub($hub)
-        {
-                $this->hubs[] = $hub;    
-        }
-        
-        /**
-        * Set XSL URL
-        * 
-        * @access   public
-        * @param    string URL
-        * @return   void
-        */
-        public function setXsl($xsl)
-        {
-                $this->xsl = $xsl;    
-        }       
-        
-        /**
-        * Set self URL
-        * 
-        * @access   public
-        * @param    string URL
-        * @return   void
-        */
-        public function setSelf($self)
-        {
-                $this->self = $self;    
-        }       
-        
-        /**
         * Set the 'description' channel element
         * 
         * @access   public
@@ -187,8 +137,7 @@ define('ATOM', 3, true);
         */
         public function setDescription($desciption)
         {
-                $tag = ($this->version == ATOM)? 'subtitle' : 'description'; 
-                $this->setChannelElement($tag, $desciption);
+                $this->setChannelElement('description', $desciption);
         }
         
         /**
@@ -217,6 +166,36 @@ define('ATOM', 3, true);
                 $this->setChannelElement('image', array('title'=>$title, 'link'=>$link, 'url'=>$url));
         }
         
+        /**
+        * Set the 'about' channel element. Only for RSS 1.0
+        * 
+        * @access   public
+        * @param    srting  value of 'about' channel tag
+        * @return   void
+        */
+        public function setChannelAbout($url)
+        {
+                $this->data['ChannelAbout'] = $url;    
+        }
+        
+  /**
+  * Genarates an UUID
+  * @author     Anis uddin Ahmad <admin@ajaxray.com>
+  * @param      string  an optional prefix
+  * @return     string  the formated uuid
+  */
+  public static function uuid($key = null, $prefix = '') 
+  {
+        $key = ($key == null)? uniqid(rand()) : $key;
+        $chars = md5($key);
+        $uuid  = substr($chars,0,8) . '-';
+        $uuid .= substr($chars,8,4) . '-';
+        $uuid .= substr($chars,12,4) . '-';
+        $uuid .= substr($chars,16,4) . '-';
+        $uuid .= substr($chars,20,12);
+
+        return $prefix . $uuid;
+  }
         // End # public functions ----------------------------------------------
         
         // Start # private functions ----------------------------------------------
@@ -229,17 +208,28 @@ define('ATOM', 3, true);
         */
         private function printHead()
         {
-                if ($this->version == RSS2)
+                $out  = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
+                
+                if($this->version == RSS2)
+                {
+                        $out .= '<rss version="2.0"
+                                        xmlns:content="http://purl.org/rss/1.0/modules/content/"
+                                        xmlns:wfw="http://wellformedweb.org/CommentAPI/"
+                                  >' . PHP_EOL;
+                }    
+                elseif($this->version == RSS1)
                 {
-                        $out  = '<?xml version="1.0" encoding="utf-8"?>'."\n";
-                        if ($this->xsl) $out .= '<?xml-stylesheet type="text/xsl" href="'.htmlspecialchars($this->xsl).'"?>' . PHP_EOL;
-                        $out .= '<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:media="http://search.yahoo.com/mrss/">' . PHP_EOL;
-                        echo $out;
+                        $out .= '<rdf:RDF 
+                                         xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+                                         xmlns="http://purl.org/rss/1.0/"
+                                         xmlns:dc="http://purl.org/dc/elements/1.1/"
+                                        >' . PHP_EOL;;
                 }
-                elseif ($this->version == JSON)
+                else if($this->version == ATOM)
                 {
-                        $this->json->rss = array('@attributes' => array('version' => '2.0'));
+                        $out .= '<feed xmlns="http://www.w3.org/2005/Atom">' . PHP_EOL;;
                 }
+                echo $out;
         }
         
         /**
@@ -250,83 +240,67 @@ define('ATOM', 3, true);
         */
         private function printTale()
         {
-                if ($this->version == RSS2)
+                if($this->version == RSS2)
                 {
-                        echo '</channel>',PHP_EOL,'</rss>'; 
+                        echo '</channel>' . PHP_EOL . '</rss>'; 
                 }    
-                // do nothing for JSON
+                elseif($this->version == RSS1)
+                {
+                        echo '</rdf:RDF>';
+                }
+                else if($this->version == ATOM)
+                {
+                        echo '</feed>';
+                }
+          
         }
 
         /**
         * Creates a single node as xml format
         * 
         * @access   private
-        * @param    string  name of the tag
+        * @param    srting  name of the tag
         * @param    mixed   tag value as string or array of nested tags in 'tagName' => 'tagValue' format
         * @param    array   Attributes(if any) in 'attrName' => 'attrValue' format
         * @return   string  formatted xml tag
         */
         private function makeNode($tagName, $tagContent, $attributes = null)
         {        
-                if ($this->version == RSS2)
+                $nodeText = '';
+                $attrText = '';
+
+                if(is_array($attributes))
                 {
-                        $nodeText = '';
-                        $attrText = '';
-                        if (is_array($attributes))
+                        foreach ($attributes as $key => $value) 
                         {
-                                foreach ($attributes as $key => $value) 
-                                {
-                                        $attrText .= " $key=\"$value\" ";
-                                }
+                                $attrText .= " $key=\"$value\" ";
                         }
-                        $nodeText .= "<{$tagName}{$attrText}>";
-                        if (is_array($tagContent))
-                        { 
-                                foreach ($tagContent as $key => $value) 
-                                {
-                                        $nodeText .= $this->makeNode($key, $value);
-                                }
-                        }
-                        else
-                        {
-                                //$nodeText .= (in_array($tagName, $this->CDATAEncoding))? $tagContent : htmlentities($tagContent);
-                                $nodeText .= htmlspecialchars($tagContent);
-                        }           
-                        //$nodeText .= (in_array($tagName, $this->CDATAEncoding))? "]]></$tagName>" : "</$tagName>";
-                        $nodeText .= "</$tagName>";
-                        return $nodeText . PHP_EOL;
                 }
-                elseif ($this->version == JSON)
+                
+                if(is_array($tagContent) && $this->version == RSS1)
                 {
-                        $tagName = (string)$tagName;
-                        $tagName = strtr($tagName, ':', '_');
-                        $node = null;
-                        if (!$tagContent && is_array($attributes) && count($attributes))
-                        {
-                                $node = array('@attributes' => $this->json_keys($attributes));
-                        } else {
-                                if (is_array($tagContent)) {
-                                        $node = $this->json_keys($tagContent);
-                                } else {
-                                        $node = $tagContent;
-                                }
-                        }
-                        return $node;
+                        $attrText = ' rdf:parseType="Resource"';
                 }
-                return ''; // should not get here
-        }
-        
-        private function json_keys(array $array) {
-                $new = array();
-                foreach ($array as $key => $val) {
-                        if (is_string($key)) $key = strtr($key, ':', '_');
-                        if (is_array($val)) {
-                                $new[$key] = $this->json_keys($val);
-                        } else {
-                                $new[$key] = $val;
+                
+                
+                $attrText .= (in_array($tagName, $this->CDATAEncoding) && $this->version == ATOM)? ' type="html" ' : '';
+                $nodeText .= (in_array($tagName, $this->CDATAEncoding))? "<{$tagName}{$attrText}><![CDATA[" : "<{$tagName}{$attrText}>";
+                 
+                if(is_array($tagContent))
+                { 
+                        foreach ($tagContent as $key => $value) 
+                        {
+                                $nodeText .= $this->makeNode($key, $value);
                         }
                 }
-                return $new;
+                else
+                {
+                        $nodeText .= (in_array($tagName, $this->CDATAEncoding))? $tagContent : htmlentities($tagContent);
+                }           
+                        
+                $nodeText .= (in_array($tagName, $this->CDATAEncoding))? "]]></$tagName>" : "</$tagName>";
+
+                return $nodeText . PHP_EOL;
         }
         
         /**
@@ -340,27 +314,41 @@ define('ATOM', 3, true);
                 switch ($this->version) 
                 {
                    case RSS2: 
-                                echo '<channel>' . PHP_EOL;    
-                                // add hubs
-                                foreach ($this->hubs as $hub) {
-                                        //echo $this->makeNode('link', '', array('rel'=>'hub', 'href'=>$hub, 'xmlns'=>'http://www.w3.org/2005/Atom'));
-                                        echo '<link rel="hub"  href="'.htmlspecialchars($hub).'" xmlns="http://www.w3.org/2005/Atom" />' . PHP_EOL;
-                                }
-                                // add self
-                                if (isset($this->self)) {
-                                        //echo $this->makeNode('link', '', array('rel'=>'self', 'href'=>$this->self, 'xmlns'=>'http://www.w3.org/2005/Atom'));
-                                        echo '<link rel="self" href="'.htmlspecialchars($this->self).'" xmlns="http://www.w3.org/2005/Atom" />' . PHP_EOL;
-                                }
-                                //Print Items of channel
-                                foreach ($this->channels as $key => $value) 
-                                {
-                                        echo $this->makeNode($key, $value);
-                                }
+                                echo '<channel>' . PHP_EOL;        
                                 break;
-                   case JSON: 
-                                $this->json->rss['channel'] = (object)$this->json_keys($this->channels);
+                   case RSS1: 
+                                echo (isset($this->data['ChannelAbout']))? "<channel rdf:about=\"{$this->data['ChannelAbout']}\">" : "<channel rdf:about=\"{$this->channels['link']}\">";
                                 break;
                 }
+                
+                //Print Items of channel
+                foreach ($this->channels as $key => $value) 
+                {
+                        if($this->version == ATOM && $key == 'link') 
+                        {
+                                // ATOM prints link element as href attribute
+                                echo $this->makeNode($key,'',array('href'=>$value));
+                                //Add the id for ATOM
+                                echo $this->makeNode('id',self::uuid($value,'urn:uuid:'));
+                        }
+                        else
+                        {
+                                echo $this->makeNode($key, $value);
+                        }    
+                        
+                }
+                
+                //RSS 1.0 have special tag <rdf:Seq> with channel 
+                if($this->version == RSS1)
+                {
+                        echo "<items>" . PHP_EOL . "<rdf:Seq>" . PHP_EOL;
+                        foreach ($this->items as $item) 
+                        {
+                                $thisItems = $item->getElements();
+                                echo "<rdf:li resource=\"{$thisItems['link']['content']}\"/>" . PHP_EOL;
+                        }
+                        echo "</rdf:Seq>" . PHP_EOL . "</items>" . PHP_EOL . "</channel>" . PHP_EOL;
+                }
         }
         
         /**
@@ -375,28 +363,14 @@ define('ATOM', 3, true);
                 {
                         $thisItems = $item->getElements();
                         
-                        echo $this->startItem();
-                        
-                        if ($this->version == JSON) {
-                                $json_item = array();
-                        }
+                        //the argument is printed as rdf:about attribute of item in rss 1.0 
+                        echo $this->startItem($thisItems['link']['content']);
                         
                         foreach ($thisItems as $feedItem ) 
                         {
-                                if ($this->version == RSS2) {
-                                        echo $this->makeNode($feedItem['name'], $feedItem['content'], $feedItem['attributes']);
-                                } elseif ($this->version == JSON) {
-                                        $json_item[strtr($feedItem['name'], ':', '_')] = $this->makeNode($feedItem['name'], $feedItem['content'], $feedItem['attributes']);
-                                }
+                                echo $this->makeNode($feedItem['name'], $feedItem['content'], $feedItem['attributes']); 
                         }
                         echo $this->endItem();
-                        if ($this->version == JSON) {
-                                if (count($this->items) > 1) {
-                                        $this->json->rss['channel']->item[] = $json_item;
-                                } else {
-                                        $this->json->rss['channel']->item = $json_item;
-                                }
-                        }
                 }
         }
         
@@ -404,15 +378,30 @@ define('ATOM', 3, true);
         * Make the starting tag of channels
         * 
         * @access   private
+        * @param    srting  The vale of about tag which is used for only RSS 1.0
         * @return   void
         */
-        private function startItem()
+        private function startItem($about = false)
         {
-                if ($this->version == RSS2)
+                if($this->version == RSS2)
                 {
                         echo '<item>' . PHP_EOL; 
                 }    
-                // nothing for JSON
+                elseif($this->version == RSS1)
+                {
+                        if($about)
+                        {
+                                echo "<item rdf:about=\"$about\">" . PHP_EOL;
+                        }
+                        else
+                        {
+                                die('link element is not set .\n It\'s required for RSS 1.0 to be used as about attribute of item');
+                        }
+                }
+                else if($this->version == ATOM)
+                {
+                        echo "<entry>" . PHP_EOL;
+                }    
         }
         
         /**
@@ -423,12 +412,24 @@ define('ATOM', 3, true);
         */
         private function endItem()
         {
-                if ($this->version == RSS2)
+                if($this->version == RSS2 || $this->version == RSS1)
                 {
                         echo '</item>' . PHP_EOL; 
                 }    
-                // nothing for JSON
+                else if($this->version == ATOM)
+                {
+                        echo "</entry>" . PHP_EOL;
+                }
         }
         
+
+        
         // End # private functions ----------------------------------------------
- }
\ No newline at end of file
+        
+ } // end of class FeedWriter
+ 
+// autoload classes
+function __autoload($class_name) 
+{
+        require_once $class_name . '.php';
+}
\ No newline at end of file