/**
* Generate article.json contents. It does so by looping though all data,
* generating valid JSON and adding attachments to workspace/tmp directory.
*
* @return string The generated JSON for article.json
* @access private
*/
private function generate_json()
{
// Base JSON
$json = array('version' => '1.1', 'identifier' => 'post-' . $this->content_id(), 'language' => 'en', 'title' => $this->content_title());
// Builders
$json['documentStyle'] = $this->build_article_style();
foreach ($this->builders as $name => $builder) {
$arr = $builder->to_array();
if ($arr) {
$json[$name] = $arr;
}
}
$json = apply_filters('apple_news_generate_json', $json, $this->content_id());
$json = json_encode($json);
// Check the JSON for unicode errors.
// For now, we'll assume that multiple unicode characters in sequence
// containing the  (\u00C2) indicate a problem as that has been the
// most common indication of the issue.
preg_match_all('/(\\\\u[0-9a-fA-F]{4}){2,}/', $json, $matches);
if (!empty($matches[0])) {
// Get a unique list of character sequences
$character_sequences = array_unique($matches[0]);
foreach ($character_sequences as &$sequence) {
// Convert back to a display format
$sequence = json_decode('{ "value":"' . $sequence . '"}');
$sequence = $sequence->value;
}
$this->workspace->log_error('json_errors', sprintf(__('Invalid unicode character sequences were found that could cause display issues on Apple News: %s', 'apple-news'), implode(', ', $character_sequences)));
}
return $json;
}
/**
* Given a node, returns an array of all the components inside that node. If
* the node is a component itself, returns an array of only one element.
*
* @param DomNode $node
* @return array
* @static
* @access public
*/
public static function get_components_from_node($node)
{
$result = array();
foreach (self::$components as $shortname => $class) {
$matched_node = $class::node_matches($node);
// Nothing matched? Skip to next match.
if (!$matched_node) {
continue;
}
// Did we match several components? If so, a hash is returned. Both the
// body and heading components can returns this, in the case they find
// non-markdown-able elements inside.
if (is_array($matched_node)) {
foreach ($matched_node as $base_component) {
$result[] = self::get_component($base_component['name'], $base_component['value']);
}
return $result;
}
// We matched a single node
$html = $node->ownerDocument->saveXML($matched_node);
$result[] = self::get_component($shortname, $html);
return $result;
}
// Nothing found. Maybe it's a container element?
if ($node->hasChildNodes()) {
foreach ($node->childNodes as $child) {
$result = array_merge($result, self::get_components_from_node($child, $node));
}
// Remove all nulls from the array
$result = array_filter($result);
}
// If nothing was found, log this as a component error by recording the node name.
// Only record components with a tagName since otherwise there is nothing to report.
// Others nodes without a match are almost always just stray empty text nodes
// that are always safe to remove. Paragraphs should also be ignored for this reason.
if (empty($result) && (!empty($node->tagName) && 'p' !== $node->tagName)) {
self::$workspace->log_error('component_errors', $node->tagName);
}
return $result;
}
