/**
* Detects encoding of html-formatted text.
* @param string $string The input html-formatted text.
* @return string Returns the detected encoding.
*/
function api_detect_encoding_html($string) {
if (@preg_match('/<head.*(<meta[^>]*content=[^>]*>).*<\/head>/si', $string, $matches)) {
if (@preg_match('/<meta[^>]*charset=(.*)["\';][^>]*>/si', $matches[1], $matches)) {
return api_refine_encoding_id(trim($matches[1]));
}
}
return api_detect_encoding(api_html_to_text($string));
}
/**
* Returns sample text based on the imported course content.
* This sample text is to be used for course language or encoding detection if there is missing (meta)data in the archive.
* @return string The resulting sample text extracted from some common resources' data fields.
*/
public function get_sample_text()
{
$sample_text = '';
foreach ($this->resources as $type => &$resources) {
if (count($resources) > 0) {
foreach ($resources as $id => &$resource) {
$title = '';
$description = '';
switch ($type) {
case RESOURCE_ANNOUNCEMENT:
$title = $resource->title;
$description = $resource->content;
break;
case RESOURCE_DOCUMENT:
$title = $resource->title;
$description = $resource->comment;
break;
case RESOURCE_EVENT:
$title = $resource->title;
$description = $resource->content;
break;
case RESOURCE_FORUM:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_FORUMCATEGORY:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_FORUMPOST:
$title = $resource->title;
$description = $resource->text;
break;
case RESOURCE_FORUMTOPIC:
$title = $resource->title;
break;
case RESOURCE_GLOSSARY:
$title = $resource->name;
$description = $resource->description;
break;
case RESOURCE_LEARNPATH:
$title = $resource->name;
$description = $resource->description;
break;
case RESOURCE_LINK:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_LINKCATEGORY:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_QUIZ:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_TEST_CATEGORY:
$title = $resource->title;
$description = $resource->description;
break;
case RESOURCE_QUIZQUESTION:
$title = $resource->question;
$description = $resource->description;
break;
case RESOURCE_SCORM:
$title = $resource->title;
break;
case RESOURCE_SURVEY:
$title = $resource->title;
$description = $resource->subtitle;
break;
case RESOURCE_SURVEYQUESTION:
$title = $resource->survey_question;
$description = $resource->survey_question_comment;
break;
case RESOURCE_TOOL_INTRO:
$description = $resource->intro_text;
break;
case RESOURCE_WIKI:
$title = $resource->title;
$description = $resource->content;
break;
case RESOURCE_THEMATIC:
$title = $resource->title;
$description = $resource->content;
break;
case RESOURCE_ATTENDANCE:
$title = $resource->params['name'];
$description = $resource->params['description'];
break;
case RESOURCE_WORK:
$title = $resource->title;
$description = $resource->description;
break;
default:
break;
}
$title = api_html_to_text($title);
$description = api_html_to_text($description);
if (!empty($title)) {
$sample_text .= $title . "\n";
}
if (!empty($description)) {
$sample_text .= $description . "\n";
}
if (!empty($title) || !empty($description)) {
$sample_text .= "\n";
}
}
}
}
return $sample_text;
}