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<?php |
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namespace Anax\Content; |
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/** |
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* Filter and format content. |
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* |
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*/ |
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class CTextFilter |
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{ |
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use \Anax\TConfigure, |
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\Anax\DI\TInjectionAware; |
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/** |
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* Call each filter. |
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* |
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* @param string $text the text to filter. |
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* @param string $filters as comma separated list of filter. |
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* |
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* @return string the formatted text. |
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*/ |
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public function doFilter($text, $filters) |
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{ |
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// Define all valid filters with their callback function. |
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$callbacks = array( |
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'bbcode' => 'bbcode2html', |
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'clickable' => 'makeClickable', |
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'markdown' => 'markdown', |
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'nl2br' => 'nl2br', |
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'shortcode' => 'shortCode', |
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); |
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// Make an array of the comma separated string $filters |
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$filter = preg_replace('/\s/', '', explode(',', $filters)); |
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// For each filter, call its function with the $text as parameter. |
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foreach ($filter as $key) { |
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if (isset($callbacks[$key])) { |
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$text = call_user_func_array([$this, $callbacks[$key]], [$text]); |
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} else { |
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throw new \Exception("The filter '$filter' is not a valid filter string."); |
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} |
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} |
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return $text; |
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} |
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/** |
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* Helper, BBCode formatting converting to HTML. |
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* |
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* @param string $text The text to be converted. |
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* |
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* @return string the formatted text. |
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* |
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* @link http://dbwebb.se/coachen/reguljara-uttryck-i-php-ger-bbcode-formattering |
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*/ |
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public function bbcode2html($text) |
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{ |
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$search = [ |
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'/\[b\](.*?)\[\/b\]/is', |
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'/\[i\](.*?)\[\/i\]/is', |
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'/\[u\](.*?)\[\/u\]/is', |
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'/\[img\](https?.*?)\[\/img\]/is', |
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'/\[url\](https?.*?)\[\/url\]/is', |
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'/\[url=(https?.*?)\](.*?)\[\/url\]/is' |
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]; |
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$replace = [ |
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'<strong>$1</strong>', |
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'<em>$1</em>', |
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'<u>$1</u>', |
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'<img src="$1" />', |
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'<a href="$1">$1</a>', |
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'<a href="$1">$2</a>' |
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]; |
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return preg_replace($search, $replace, $text); |
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} |
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/** |
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* Make clickable links from URLs in text. |
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* |
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* @param string $text the text that should be formatted. |
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* |
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* @return string with formatted anchors. |
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* |
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* @link http://dbwebb.se/coachen/lat-php-funktion-make-clickable-automatiskt-skapa-klickbara-lankar |
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*/ |
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public function makeClickable($text) |
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{ |
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return preg_replace_callback( |
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'#\b(?<![href|src]=[\'"])https?://[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/))#', |
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function ($matches) { |
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return "<a href=\'{$matches[0]}\'>{$matches[0]}</a>"; |
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}, |
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$text |
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); |
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} |
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/** |
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* Format text according to Markdown syntax. |
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* |
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* @param string $text the text that should be formatted. |
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* |
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* @return string as the formatted html-text. |
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* |
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* @link http://dbwebb.se/coachen/skriv-for-webben-med-markdown-och-formattera-till-html-med-php |
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*/ |
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public function markdown($text) |
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{ |
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return \Michelf\MarkdownExtra::defaultTransform($text); |
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} |
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/** |
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* For convenience access to nl2br |
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* |
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* @param string $text text to be converted. |
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* |
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* @return string the formatted text. |
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*/ |
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public function nl2br($text) |
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{ |
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return nl2br($text); |
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} |
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/** |
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* Shortcode to to quicker format text as HTML. |
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* |
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* @param string $text text to be converted. |
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* |
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* @return string the formatted text. |
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*/ |
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public function shortCode($text) |
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{ |
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$patterns = [ |
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'/\[(FIGURE)[\s+](.+)\]/', |
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'/\[(BASEURL)\]/', |
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'/\[(RELURL)\]/', |
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'/\[(ASSET)\]/', |
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]; |
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return preg_replace_callback( |
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$patterns, |
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function ($matches) { |
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switch ($matches[1]) { |
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case 'FIGURE': |
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return CTextFilter::shortCodeFigure($matches[2]); |
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break; |
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case 'BASEURL': |
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return CTextFilter::shortCodeBaseurl(); |
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break; |
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case 'RELURL': |
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return CTextFilter::shortCodeRelurl(); |
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break; |
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case 'ASSET': |
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return CTextFilter::shortCodeAsset(); |
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break; |
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default: |
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return "{$matches[1]} is unknown shortcode."; |
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} |
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}, |
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$text |
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); |
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} |
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/** |
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* Init shortcode handling by preparing the option list to an array, for those using arguments. |
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* |
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* @param string $options for the shortcode. |
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* |
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* @return array with all the options. |
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*/ |
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protected static function shortCodeInit($options) |
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{ |
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preg_match_all('/[a-zA-Z0-9]+="[^"]+"|\S+/', $options, $matches); |
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$res = []; |
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foreach ($matches[0] as $match) { |
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$pos = strpos($match, '='); |
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if ($pos == false) { |
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$res[$match] = true; |
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} else { |
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$key = substr($match, 0, $pos); |
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$val = trim(substr($match, $pos+1), '"'); |
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$res[$key] = $val; |
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} |
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} |
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return $res; |
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} |
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/** |
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* Shortcode for <figure>. |
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* |
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* Usage example: [FIGURE src="img/home/me.jpg" caption="Me" alt="Bild på mig" nolink="nolink"] |
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* |
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* @param string $options for the shortcode. |
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* |
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* @return array with all the options. |
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*/ |
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protected static function shortCodeFigure($options) |
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{ |
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extract( |
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array_merge( |
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[ |
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'id' => null, |
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'class' => null, |
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'src' => null, |
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'title' => null, |
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'alt' => null, |
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'caption' => null, |
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'href' => null, |
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'nolink' => false, |
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], |
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CTextFilter::shortCodeInit($options) |
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), |
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EXTR_SKIP |
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); |
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$id = $id ? " id='$id'" : null; |
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$class = $class ? " class='figure $class'" : " class='figure'"; |
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$title = $title ? " title='$title'" : null; |
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if (!$alt && $caption) { |
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$alt = $caption; |
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} |
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if (!$href) { |
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$pos = strpos($src, '?'); |
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$href = $pos ? substr($src, 0, $pos) : $src; |
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} |
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$a_start = null; |
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$a_end = null; |
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if (!$nolink) { |
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$a_start = "<a href='{$href}'>"; |
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$a_end = "</a>"; |
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} |
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$html = <<<EOD |
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<figure{$id}{$class}> |
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{$a_start}<img src='{$src}' alt='{$alt}'{$title}/>{$a_end} |
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<figcaption markdown=1>{$caption}</figcaption> |
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</figure> |
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EOD; |
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return $html; |
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} |
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/** |
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* Shortcode for adding BASEURL to links. |
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* |
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* Usage example: [BASEURL] |
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* |
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* @return array with all the options. |
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*/ |
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protected function shortCodeBaseurl() |
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{ |
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return $this->di->url->create() . "/"; |
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} |
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/** |
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* Shortcode for adding RELURL to links. |
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* |
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* Usage example: [RELURL] |
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* |
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* @return array with all the options. |
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*/ |
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protected function shortCodeRelurl() |
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{ |
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return $this->di->url->createRelative() . "/"; |
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} |
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/** |
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* Shortcode for adding RELURL to links. |
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* |
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* Usage example: [RELURL] |
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* |
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* @return array with all the options. |
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*/ |
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protected function shortCodeAsset() |
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{ |
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return $this->di->url->asset() . "/"; |
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} |
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} |
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The break statement is not necessary if it is preceded for example by a return statement:
If you would like to keep this construct to be consistent with other case statements, you can safely mark this issue as a false-positive.