/**
* Splits a text in smaller parts having a length lower than $maxLength
* Texts would be cut after a period.
*
* @TODO Improve me to work with HTML
* @param string $text Text to split in smaller parts
* @param int $maxLength Maximum length of a text part
* @param boolean $html If true HTML tags will be handled properly
* @return array
*/
protected function _splitText($text, $maxLength, $html = false)
{
if (strlen($text) <= $maxLength) {
$texts = array($text);
} else {
if ($html) {
App::import('Lib', 'I18n.HtmlTokenizer');
$Tokenizer = new HtmlTokenizer($text);
$texts = $Tokenizer->tokens($maxLength);
} else {
$sentences = preg_split("/[\\.][\\s]+/", $text);
$texts = array('');
$i = 0;
foreach ($sentences as $sentence) {
if (empty($sentence)) {
continue;
}
$sentence .= '. ';
if (empty($texts[$i]) && strlen($sentence) >= $maxLength) {
// Cut the string before the latest word
while (strlen($sentence) >= $maxLength) {
$sentencePart = substr($sentence, 0, $maxLength);
$sentencePart = substr($sentencePart, 0, strrpos($sentencePart, ' ') + 1);
$texts[$i++] = $sentencePart;
$sentence = substr($sentence, strlen($sentencePart));
}
$texts[$i++] = $sentence;
$texts[$i] = '';
} elseif (strlen($texts[$i]) + strlen($sentence) < $maxLength) {
$texts[$i] .= $sentence;
} else {
$i++;
$texts[$i] = $sentence;
}
}
// Removes the ". " of the latest text if it was not finished with a period
if (substr(trim($text), -1) !== '.') {
$texts[count($texts) - 1] = substr($texts[count($texts) - 1], 0, -2);
}
}
}
return $texts;
}
/**
* Auxiliary function to extract tokens from an child node
*
* @param DomNode $child the child node to extract tokens from
* @param array tokes array of tokes previously extracted
* @param int $length maximum size for each token extracted from the HTML document
* @return array list of tokens
*/
protected function _tokenizeChild($child, $tokens, $length)
{
$attributes = $this->_getNodeAttributes($child);
if ($attributes) {
$attributes = ' ' . $attributes;
}
$tokens[] = "<{$child->tagName}{$attributes}>";
foreach ($child->childNodes as $c) {
$cContent = $this->_getTokenContents($c);
if (!$c->hasChildNodes()) {
if (!trim($cContent)) {
continue;
}
if (isset($child->tagName) && $child->tagName == 'code') {
$cContent = str_replace('??>', '?>', $cContent);
}
$tokens[] = $cContent;
continue;
}
$tokenizer = new HtmlTokenizer($cContent);
$newTokens = $tokenizer->tokens($length, $c);
if (array_sum(array_map('strlen', $newTokens)) <= $length) {
$tokens[] = join('', $newTokens);
} else {
$tokens = array_merge($tokens, $newTokens);
}
}
$tokens[] = "</{$child->tagName}>";
return $tokens;
}
