public.application.resize_summary.php

<?php
  $_LW->REGISTERED_APPS['resize_summary'] = array(
    'title' => 'Resize Summary',
    'handlers' => array('onOutputRSS'),
    'custom' => array(
      'always_truncate'=>false, // always truncate, or require /truncate/1? 
      'fields_to_shorten'=>array(  // fields to shorten, and the maximum number of words for that field 
          'description'=>30 
      ) 
    ) 
  ); 
 
 
  class LiveWhaleApplicationResizeSummary { 
       
    public function onOutputRSS($buffer) { // post-processes RSS output 
        global $_LW, $LIVE_URL; 
        if (!empty($_LW->REGISTERED_APPS['resize_summary']['custom']['always_truncate']) || in_array('truncate', @$LIVE_URL['REQUEST'])) { // if truncating should occur 
            $fields_to_shorten=&$_LW->REGISTERED_APPS['resize_summary']['custom']['fields_to_shorten']; // get fields to shorten 
            if (!empty($fields_to_shorten)) { // if there are fields to shorten 
                foreach($fields_to_shorten as $field=>$max_words) { // for each one 
                    if (!empty($max_words)) { // if there is a valid maximum word length 
                        $find=array(); 
                        $replace=array(); 
                        $matches=array(); 
                        $field=preg_quote($field, '~'); 
                        preg_match_all('~<'.$field.'><\!\[CDATA\[(.+?)\]\]></'.$field.'>~s', $buffer, $matches); // find all instances of this field 
                        if (!empty($matches[1])) { 
                            foreach($matches[1] as $field_name) { 
                                if (str_word_count($field_name)>$max_words) { // swap out abbreviated value where necessary 
                                    $find[]='<'.$field.'><![CDATA['.$field_name.']]></'.$field.'>'; 
                                    $replace[]='<'.$field.'><![CDATA['.$_LW->setFormatSummarize($field_name, $max_words).']]></'.$field.'>'; 
                                }; 
                            }; 
                            if (!empty($find)) { // perform final find/replace of all swapped values 
                                $buffer=str_replace($find, $replace, $buffer); 
                            }; 
                        }; 
                    }; 
                }; 
            }; 
        }; 
        return $buffer; 
    } 
     
  } 
 
?>