/**
* Handles the particulars of editing a classifier, which includes changing
* its label and adding training examples.
*
* This activity directly handles changing the class label, but not adding
* training examples. The latter activity is done interactively without
* reloading the page via XmlHttpRequests, coordinated by the classifier
* controller dedicated to that task.
*
* @param array $data data to be passed on to the view
* @param array $classifiers map from class labels to their associated
* classifiers
* @param array $machine_urls string urls of machines managed by this
* Yioop name server
*/
function editClassifier(&$data, $classifiers, $machine_urls)
{
$parent = $this->parent;
$data['ELEMENT'] = 'editclassifier';
$data['INCLUDE_SCRIPTS'] = array('classifiers');
// We want recrawls, but not archive crawls.
$crawls = $parent->model("crawl")->getCrawlList(false, true, $machine_urls);
$data['CRAWLS'] = $crawls;
$classifier = $classifiers[$data['class_label']];
if (isset($_REQUEST['update']) && $_REQUEST['update'] == 'update') {
if (isset($_REQUEST['rename_label'])) {
$new_label = substr($parent->clean($_REQUEST['rename_label'], 'string'), 0, NAME_LEN);
$new_label = preg_replace('/[^a-zA-Z0-9_]/', '', $new_label);
if (!isset($classifiers[$new_label])) {
$old_label = $classifier->class_label;
$classifier->class_label = $new_label;
Classifier::setClassifier($classifier);
Classifier::deleteClassifier($old_label);
$data['class_label'] = $new_label;
} else {
$data['SCRIPT'] .= "doMessage('<h1 class=\"red\">" . tl('crawl_component_classifier_exists') . '</h1>\');';
}
}
}
$data['classifier'] = $classifier;
// Translations for the classification javascript.
$data['SCRIPT'] .= "window.tl = {" . 'crawl_component_load_failed:"' . tl('crawl_component_load_failed') . '",' . 'crawl_component_loading:"' . tl('crawl_component_loading') . '",' . 'crawl_component_added_examples:"' . tl('crawl_component_added_examples') . '",' . 'crawl_component_label_update_failed:"' . tl('crawl_component_label_update_failed') . '",' . 'crawl_component_updating:"' . tl('crawl_component_updating') . '",' . 'crawl_component_acc_update_failed:"' . tl('crawl_component_acc_update_failed') . '",' . 'crawl_component_na:"' . tl('crawl_component_na') . '",' . 'crawl_component_no_docs:"' . tl('crawl_component_no_docs') . '",' . 'crawl_component_num_docs:"' . tl('crawl_component_num_docs') . '",' . 'crawl_component_in_class:"' . tl('crawl_component_in_class') . '",' . 'crawl_component_not_in_class:"' . tl('crawl_component_not_in_class') . '",' . 'crawl_component_skip:"' . tl('crawl_component_skip') . '",' . 'crawl_component_prediction:"' . tl('crawl_component_prediction') . '",' . 'crawl_component_scores:"' . tl('crawl_component_scores') . '"' . '};';
/*
We pass along authentication information to the client, so that it
can authenticate any XmlHttpRequests that it makes in order to label
documents.
*/
$time = strval(time());
$session = md5($time . AUTH_KEY);
$data['SCRIPT'] .= "Classifier.initialize(" . "'{$data['class_label']}'," . "'{$session}'," . "'{$time}');";
}
/**
* Deletes an existing classifier, specified by its label.
*
* @param string $label class label of the existing classifier
*/
function deleteClassifier($label)
{
Classifier::deleteClassifier($label);
$mix_name = Classifier::getCrawlMixName($label);
$mix_time = $this->crawlModel->getCrawlMixTimestamp($mix_name);
if ($mix_time) {
$this->crawlModel->deleteCrawlMixIteratorState($mix_time);
$this->crawlModel->deleteCrawlMix($mix_time);
}
}
