/**
* Parses uploaded CSV file and saves new data for the chart.
*
* @since 1.0.0
*
* @access public
*/
public function uploadData()
{
// validate nonce
if (!wp_verify_nonce(filter_input(INPUT_GET, 'nonce'))) {
status_header(403);
exit;
}
// check chart, if chart exists
$chart_id = filter_input(INPUT_GET, 'chart', FILTER_VALIDATE_INT);
if (!$chart_id || !($chart = get_post($chart_id)) || $chart->post_type != Visualizer_Plugin::CPT_VISUALIZER) {
status_header(400);
exit;
}
$source = null;
$render = new Visualizer_Render_Page_Update();
if (filter_input(INPUT_POST, 'remote_data', FILTER_VALIDATE_URL)) {
$source = new Visualizer_Source_Csv_Remote($_POST['remote_data']);
} elseif (isset($_FILES['local_data']) && $_FILES['local_data']['error'] == 0) {
$source = new Visualizer_Source_Csv($_FILES['local_data']['tmp_name']);
} else {
$render->message = esc_html__("CSV file with chart data was not uploaded. Please, try again.", Visualizer_Plugin::NAME);
}
if ($source) {
if ($source->fetch()) {
$chart->post_content = $source->getData();
wp_update_post($chart->to_array());
update_post_meta($chart->ID, Visualizer_Plugin::CF_SERIES, $source->getSeries());
update_post_meta($chart->ID, Visualizer_Plugin::CF_SOURCE, $source->getSourceName());
update_post_meta($chart->ID, Visualizer_Plugin::CF_DEFAULT_DATA, 0);
$render->data = json_encode($source->getRawData());
$render->series = json_encode($source->getSeries());
} else {
$render->message = esc_html__("CSV file is broken or invalid. Please, try again.", Visualizer_Plugin::NAME);
}
}
$render->render();
exit;
}
/**
* Returns file handle to fetch data from.
*
* @since 1.4.2
*
* @access protected
* @staticvar boolean $allow_url_fopen Determines whether or not allow_url_fopen option is enabled.
* @param string $filename Optional file name to get handle. If omitted, $_filename is used.
* @return resource File handle resource on success, otherwise FALSE.
*/
protected function _get_file_handle($filename = false)
{
static $allow_url_fopen = null;
if ($this->_tmpfile && is_readable($this->_tmpfile)) {
return parent::_get_file_handle($this->_tmpfile);
}
if (is_null($allow_url_fopen)) {
$allow_url_fopen = filter_var(ini_get('allow_url_fopen'), FILTER_VALIDATE_BOOLEAN);
}
$scheme = parse_url($this->_filename, PHP_URL_SCHEME);
if ($allow_url_fopen && in_array($scheme, stream_get_wrappers())) {
return parent::_get_file_handle($filename);
}
require_once ABSPATH . 'wp-admin/includes/file.php';
$this->_tmpfile = download_url($this->_filename);
return !is_wp_error($this->_tmpfile) ? parent::_get_file_handle($this->_tmpfile) : false;
}
/**
* Handles chart type selection page.
*
* @since 1.0.0
*
* @access private
*/
private function _handleTypesPage()
{
// process post request
if ($_SERVER['REQUEST_METHOD'] == 'POST' && wp_verify_nonce(filter_input(INPUT_POST, 'nonce'))) {
$type = filter_input(INPUT_POST, 'type');
if (in_array($type, Visualizer_Plugin::getChartTypes())) {
// save new chart type
update_post_meta($this->_chart->ID, Visualizer_Plugin::CF_CHART_TYPE, $type);
// if the chart has default data, update it with appropriate default data for new type
if (filter_var(get_post_meta($this->_chart->ID, Visualizer_Plugin::CF_DEFAULT_DATA, true), FILTER_VALIDATE_BOOLEAN)) {
$source = new Visualizer_Source_Csv(VISUALIZER_ABSPATH . DIRECTORY_SEPARATOR . 'samples' . DIRECTORY_SEPARATOR . $type . '.csv');
$source->fetch();
$this->_chart->post_content = $source->getData();
wp_update_post($this->_chart->to_array());
update_post_meta($this->_chart->ID, Visualizer_Plugin::CF_SERIES, $source->getSeries());
}
// redirect to next tab
wp_redirect(add_query_arg('tab', 'data'));
return;
}
}
$render = new Visualizer_Render_Page_Types();
$render->type = get_post_meta($this->_chart->ID, Visualizer_Plugin::CF_CHART_TYPE, true);
$render->types = Visualizer_Plugin::getChartTypes();
$render->chart = $this->_chart;
wp_enqueue_style('visualizer-frame');
wp_enqueue_script('visualizer-frame');
wp_iframe(array($render, 'render'));
}