function replace_file_links($question, $fromcourseid, $tocourseid, $url, $destination)
{
global $CFG;
$updateqrec = false;
/// Question image
if (!empty($question->image)) {
//support for older questions where we have a complete url in image field
if (substr(strtolower($question->image), 0, 7) == 'http://') {
$questionimage = preg_replace('!^' . question_file_links_base_url($fromcourseid) . preg_quote($url, '!') . '$!i', $destination, $question->image, 1);
} else {
$questionimage = preg_replace('!^' . preg_quote($url, '!') . '$!i', $destination, $question->image, 1);
}
if ($questionimage != $question->image) {
$question->image = $questionimage;
$updateqrec = true;
}
}
/// Questiontext and general feedback.
$question->questiontext = question_replace_file_links_in_html($question->questiontext, $fromcourseid, $tocourseid, $url, $destination, $updateqrec);
$question->generalfeedback = question_replace_file_links_in_html($question->generalfeedback, $fromcourseid, $tocourseid, $url, $destination, $updateqrec);
/// If anything has changed, update it in the database.
if ($updateqrec) {
if (!update_record('question', addslashes_recursive($question))) {
error('Couldn\'t update question ' . $question->name);
}
}
/// Answers, if this question uses them.
if (isset($question->options->answers)) {
//answers that do not need updating have been unset
foreach ($question->options->answers as $answer) {
$answerchanged = false;
/// URLs in the answers themselves, if appropriate.
if ($this->has_html_answers()) {
$answer->answer = question_replace_file_links_in_html($answer->answer, $fromcourseid, $tocourseid, $url, $destination, $answerchanged);
}
/// URLs in the answer feedback.
$answer->feedback = question_replace_file_links_in_html($answer->feedback, $fromcourseid, $tocourseid, $url, $destination, $answerchanged);
/// If anything has changed, update it in the database.
if ($answerchanged) {
if (!update_record('question_answers', addslashes_recursive($answer))) {
error('Couldn\'t update question (' . $question->name . ') answer ' . $answer->id);
}
}
}
}
}
function question_replace_file_links_in_html($html, $fromcourseid, $tocourseid, $url, $destination, &$changed)
{
global $CFG;
if ($CFG->slasharguments) {
// Use this method if possible for better caching
$tourl = "{$CFG->wwwroot}/file.php/{$tocourseid}/{$destination}";
} else {
$tourl = "{$CFG->wwwroot}/file.php?file=/{$tocourseid}/{$destination}";
}
$fromurl = question_file_links_base_url($fromcourseid) . preg_quote($url, '!');
$searchfor = array('!(<\\s*(a|img)\\s[^>]*(href|src)\\s*=\\s*")' . $fromurl . '(")!i', '!(<\\s*(a|img)\\s[^>]*(href|src)\\s*=\\s*\')' . $fromurl . '(\')!i');
$newhtml = preg_replace($searchfor, '\\1' . $tourl . '\\5', $html);
if ($newhtml != $html) {
$changed = true;
}
return $newhtml;
}
function question_replace_file_links_in_html($html, $fromcourseid, $tocourseid, $url, $destination, &$changed)
{
global $CFG;
require_once $CFG->libdir . '/filelib.php';
$tourl = get_file_url("{$tocourseid}/{$destination}");
$fromurl = question_file_links_base_url($fromcourseid) . preg_quote($url, '!');
$searchfor = array('!(<\\s*(a|img)\\s[^>]*(href|src)\\s*=\\s*")' . $fromurl . '(")!i', '!(<\\s*(a|img)\\s[^>]*(href|src)\\s*=\\s*\')' . $fromurl . '(\')!i');
$newhtml = preg_replace($searchfor, '\\1' . $tourl . '\\5', $html);
if ($newhtml != $html) {
$changed = true;
}
return $newhtml;
}
function replace_file_links($question, $fromcourseid, $tocourseid, $url, $destination)
{
global $CFG;
parent::replace_file_links($question, $fromcourseid, $tocourseid, $url, $destination);
$optionschanged = false;
if (!empty($question->options->backgroundmedia->media)) {
//support for older questions where we have a complete url in image field
if (substr(strtolower($question->options->backgroundmedia->media), 0, 7) == 'http://') {
$questionbackground = preg_replace('!^' . question_file_links_base_url($fromcourseid) . preg_quote($url, '!') . '$!i', $destination, $question->options->backgroundmedia->media, 1);
} else {
$questionbackground = preg_replace('!^' . preg_quote($url, '!') . '$!i', $destination, $question->options->backgroundmedia->media, 1);
}
if ($questionbackground != $question->options->backgroundmedia->media) {
$question->options->backgroundmedia->media = $questionbackground;
$optionschanged = true;
}
}
$question->options->feedbackok = question_replace_file_links_in_html($question->options->feedbackok, $fromcourseid, $tocourseid, $url, $destination, $optionschanged);
$question->options->feedbackmissed = question_replace_file_links_in_html($question->options->feedbackmissed, $fromcourseid, $tocourseid, $url, $destination, $optionschanged);
if ($optionschanged) {
if (!update_record('question_dragdrop', addslashes_recursive($question->options))) {
error('Couldn\'t update \'question_dragdrop\' record ' . $question->options->id);
}
}
$mediachanged = false;
foreach ($question->options->media as $media) {
if (!empty($media->media)) {
if (substr(strtolower($media->media), 0, 7) == 'http://') {
$medianame = preg_replace('!^' . question_file_links_base_url($fromcourseid) . preg_quote($url, '!') . '$!i', $destination, $media->media, 1);
} else {
$medianame = preg_replace('!^' . preg_quote($url, '!') . '$!i', $destination, $media->media, 1);
}
if ($medianame != $media->media) {
$media->media = $medianame;
$mediachanged = true;
}
}
$media->questiontext = question_replace_file_links_in_html($media->questiontext, $fromcourseid, $tocourseid, $url, $destination, $mediachanged);
if ($mediachanged) {
if (!update_record('question_dragdrop_media', addslashes_recursive($media))) {
error('Couldn\'t update \'question_dragdrop_media\' record ' . $media->id);
}
}
}
}