ParseBBC Tracked Content.php

<?php

$message = $parser->parse($message);

function captureTrackedContent($message, $code, $pos_padding = 0)
{
	$start = $pos_padding + $code[Codes::TRACKED_CONTENT]['start'];
	$end = $pos_padding + isset($code[Codes::TRACKED_CONTENT]['end']) ? $code[Codes::TRACKED_CONTENT]['end'] : strlen($message);
	
	$content = substr($message, $start, $end - $start);
	
	return $content;
}

function handleFootnotes(&$message, $parser)
{
	$list = '<ol class="footnotes">';

	$pos_padding = 0;

	foreach ($parser->getTrackedContent('footnote') as $i => $code)
	{
		$start = $pos_padding + $code[Codes::TRACKED_CONTENT]['start'];
		$end = $pos_padding + isset($code[Codes::TRACKED_CONTENT]['end']) ? $code[Codes::TRACKED_CONTENT]['end'] : strlen($message);
		
		$content = substr($message, $start, $end - $start);
		$list .= '<li id="footnote' . $i . '>' . $content . '</li>';
		
		$insert = '<sup class="bbc_footnotes">' . $i . '</sup>';
		$message = substr_replace($message, $insert, $start, 0);
		$pos_padding += strlen($insert);
	}

	$list .= '</ul>';
}

function handleTableOfContents($message, $parser)
{
	$toc = '<div class="toc">';
	$level = -1;
	
	foreach ($parser->getTrackedContent('h') as $i => $code)
	{
		$content = captureTrackedContent($message, $code);
		$last_level = $level;
		
		// getEquals() has to be implemented in some way
		$level = $code->getEquals();
		
		// This is a child node
		if ($level > $last_level)
		{
			$toc .= '<li><ul>' . $content. '</ul></li>';
		}
		else
		{
			$toc .= '<li>' . $content . '</li>';
		}
	}
	
	$toc .= '</div>';
	
	$toc_len = strlen($toc);
	$pos_padding = 0;
	
	foreach ($parser->getTrackedContent('toc') as $code)
	{
		// Just need the start pos to know where to insert it.
		$start = $pos_padding + $code[Codes::TRACKED_CONTENT]['start']
		
		// Insert the toc in the message
		$message = substr_replace($message, $toc, $start, 0);
		
		// Increase the pos by the count
		$pos_padding += $toc_len;
	}
}