/assets/snippets/ditto/extenders/summary.extender.inc.php

<?php



/*

 * Title: Summary

 * Purpose:

 *  	Legacy support for the [+summary+] placeholder

*/

mb_internal_encoding("UTF-8");

$placeholders['summary'] = array("introtext,content","determineSummary","@GLOBAL ditto_summary_type");

$placeholders['link'] = array("id","determineLink");



$trunc = isset($trunc) ? $trunc : 1;

 /*

	Param: trunc



	Purpose:

	Enable truncation on the summary placeholder



	Options:

	0 - off

	1 - on

	

	Default:

	1 - on

*/

$splitter = isset($truncAt) ? $truncAt : "<!-- splitter -->";

 /*

	Param: truncAt



	Purpose:

	Location to split the content at



	Options:

	Any unique text or code string that is contained

	in the content of each document

	

	Default:

	"<!-- splitter -->"

*/

$length = isset($truncLen) ? $truncLen : 300;

 /*

	Param: truncLen



	Purpose:

	Number of characters to show of the content



	Options:

	Any number greater than <truncOffset>



	Default:

	300

*/

$offset = isset($truncOffset) ? $truncOffset : 30;

 /*

	Param: truncOffset



	Purpose:

	Number of charactars to "wander" either way of <truncLen>



	Options:

	Any number greater less than <truncLen>



	Default:

	30

*/

$text = isset($truncText)? $truncText : "Read more...";

 /*

	Param: truncText



	Purpose:

	Text to be displayed in [+link+]



	Options:

	Any valid text or html

	

	Default:

	"Read more..."

*/

$trunc_tpl = isset($tplTrunc)? template::fetch($tplTrunc) : false;

 /*

	Param: tplTrunc



	Purpose:

	Template to be used for [+link+]



	Options:

	- Any valid chunk name

	- Code via @CODE:

	- File via @FILE:

	

	Placeholders:

	[+url+] - URL of the document

	[+text+] - &truncText



	Default:

	&truncText

*/

$GLOBALS['ditto_summary_link'] = "";

$GLOBALS['ditto_summary_params'] = compact("trunc","splitter","length","offset","text","trunc_tpl");

$GLOBALS['ditto_object'] = $ditto;

// ---------------------------------------------------

// Truncate Functions

// ---------------------------------------------------

if (!function_exists("determineLink")) {

	function determineLink($resource) {

		global $ditto_object,$ditto_summary_params,$ditto_summary_link;

		if ($ditto_summary_link !== false) {

			$parameters = array(

			"url" => $ditto_summary_link,

			"text" => $ditto_summary_params["text"],

			);

			$tplTrunc = $ditto_summary_params["trunc_tpl"];

			if ($tplTrunc !== false) {

				$source = $tplTrunc;

			} else {

				$source = '<a href="[+url+]" title="[+text+]">[+text+]</a>';

			}

			return $ditto_object->template->replace($parameters,$source);

		} else {

			return '';

		}

	}

}

if (!function_exists("determineSummary")) {

	function determineSummary($resource) {

		global $ditto_summary_params;

		$trunc = new truncate();

		$p = $ditto_summary_params;

		$output = $trunc->execute($resource, $p['trunc'], $p['splitter'], $p['text'], $p['length'], $p['offset'], $p['splitter'], true);

		$GLOBALS['ditto_summary_link'] = $trunc->link;

		$GLOBALS['ditto_summary_type'] = $trunc->summaryType;

		return $output;

	}

}

// ---------------------------------------------------

// Truncate Class

// ---------------------------------------------------

if (!class_exists("truncate")) {

	class truncate{

		var $summaryType,$link;



		function html_substr($posttext, $minimum_length = 200, $length_offset = 20, $truncChars=false) {



		   // $minimum_length:

		   // The approximate length you want the concatenated text to be





		   // $length_offset:

		   // The variation in how long the text can be in this example text

		   // length will be between 200 and 200-20=180 characters and the

		   // character where the last tag ends



		   // Reset tag counter & quote checker

		   $tag_counter = 0;

		   $quotes_on = FALSE;

		   // Check if the text is too long

		   if (mb_strlen($posttext) > $minimum_length && $truncChars != 1) {



		       // Reset the tag_counter and pass through (part of) the entire text

		       $c = 0;

		       for ($i = 0; $i < mb_strlen($posttext); $i++) {

		           // Load the current character and the next one

		           // if the string has not arrived at the last character

		           $current_char = mb_substr($posttext,$i,1);

		           if ($i < mb_strlen($posttext) - 1) {

		               $next_char = mb_substr($posttext,$i + 1,1);

		           }

		           else {

		               $next_char = "";

		           }

		           // First check if quotes are on

		           if (!$quotes_on) {

		               // Check if it's a tag

		               // On a "<" add 3 if it's an opening tag (like <a href...)

		               // or add only 1 if it's an ending tag (like </a>)

		               if ($current_char == '<') {

		                   if ($next_char == '/') {

		                       $tag_counter += 1;

		                   }

		                   else {

		                       $tag_counter += 3;

		                   }

		               }

		               // Slash signifies an ending (like </a> or ... />)

		               // substract 2

		               if ($current_char == '/' && $tag_counter <> 0) $tag_counter -= 2;

		               // On a ">" substract 1

		               if ($current_char == '>') $tag_counter -= 1;

		               // If quotes are encountered, start ignoring the tags

		               // (for directory slashes)

		               if ($current_char == '"') $quotes_on = TRUE;

		           }

		           else {

		               // IF quotes are encountered again, turn it back off

		               if ($current_char == '"') $quotes_on = FALSE;

		           }



		           // Count only the chars outside html tags

		           if($tag_counter == 2 || $tag_counter == 0){

		               $c++;

		           }



		           // Check if the counter has reached the minimum length yet,

		           // then wait for the tag_counter to become 0, and chop the string there

		           if ($c > $minimum_length - $length_offset && $tag_counter == 0) {

		               $posttext = mb_substr($posttext,0,$i + 1);

		               return $posttext;

		           }

		       }

		   }  return $this->textTrunc($posttext, $minimum_length + $length_offset);

		}



		function textTrunc($string, $limit, $break=". ") {

	  	// Original PHP code from The Art of Web: www.the-art-of-web.com



	    // return with no change if string is shorter than $limit

	    if(mb_strlen($string) <= $limit) return $string;



	    $string = mb_substr($string, 0, $limit);

	    if(false !== ($breakpoint = mb_strrpos($string, $break))) {

	      $string = mb_substr($string, 0, $breakpoint+1);

	    }



	    return $string;

	  }



		function closeTags($text) {

			global $debug;

			$openPattern = "/<([^\/].*?)>/";

			$closePattern = "/<\/(.*?)>/";

			$endOpenPattern = "/<([^\/].*?)$/";

			$endClosePattern = "/<(\/.*?[^>])$/";

			$endTags = '';



			preg_match_all($openPattern, $text, $openTags);

			preg_match_all($closePattern, $text, $closeTags);



			if ($debug == 1) {

				print_r($openTags);

				print_r($closeTags);

			}



			$c = 0;

			$loopCounter = count($closeTags[1]); //used to prevent an infinite loop if the html is malformed

			while ($c < count($closeTags[1]) && $loopCounter) {

				$i = 0;

				while ($i < count($openTags[1])) {

					$tag = trim($openTags[1][$i]);



					if (mb_strstr($tag, ' ')) {

						$tag = mb_substr($tag, 0, strpos($tag, ' '));

					}

					if ($debug == 1) {

						echo $tag . '==' . $closeTags[1][$c] . "\n";

					}

					if ($tag == $closeTags[1][$c]) {

						$openTags[1][$i] = '';

						$c++;

						break;

					}

					$i++;

				}

				$loopCounter--;

			}



			$results = $openTags[1];



			if (is_array($results)) {

				$results = array_reverse($results);



				foreach ($results as $tag) {

					$tag = trim($tag);



					if (mb_strstr($tag, ' ')) {

						$tag = mb_substr($tag, 0, strpos($tag, ' '));

					}

					if (!mb_stristr($tag, 'br') && !mb_stristr($tag, 'img') && !empty ($tag)) {

						$endTags .= '</' . $tag . '>';

					}

				}

			}

			return $text . $endTags;

		}



		function execute($resource, $trunc, $splitter, $linktext, $truncLen, $truncOffset, $truncsplit, $truncChars) {

			$summary = '';

			$this->summaryType = "content";

			$this->link = false;

			$closeTags = true;

			// summary is turned off



			if ((mb_strstr($resource['content'], $splitter)) && $truncsplit) {

				$summary = array ();



				// HTMLarea/XINHA encloses it in paragraph's

				$summary = explode('<p>' . $splitter . '</p>', $resource['content']);



				// For TinyMCE or if it isn't wrapped inside paragraph tags

				$summary = explode($splitter, $summary['0']);



				$summary = $summary['0'];

				$this->link = '[~' . $resource['id'] . '~]';

				$this->summaryType = "content";

		

				// fall back to the summary text

			} else if (mb_strlen($resource['introtext']) > 0) {

					$summary = $resource['introtext'];

					$this->link = '[~' . $resource['id'] . '~]';

					$this->summaryType = "introtext";

					$closeTags = false;

					// fall back to the summary text count of characters

			} else if (mb_strlen($resource['content']) > $truncLen && $trunc == 1) {

					$summary = $this->html_substr($resource['content'], $truncLen, $truncOffset, $truncChars);

					$this->link = '[~' . $resource['id'] . '~]';

					$this->summaryType = "content";

					// and back to where we started if all else fails (short post)

			} else {

				$summary = $resource['content'];

				$this->summaryType = "content";

				$this->link = false;

			}



			// Post-processing to clean up summaries

			$summary = ($closeTags === true) ? $this->closeTags($summary) : $summary;

			return $summary;

		}

	}

}

?>