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<?php
/**
* JsonFormat - JSON Feed Version 1
* https://jsonfeed.org/version/1
*
* Validators:
* https://validator.jsonfeed.org
* https://github.com/vigetlabs/json-feed-validator
*/
class JsonFormat extends FormatAbstract
{
const MIME_TYPE = 'application/json';
const VENDOR_EXCLUDES = [
'author',
'title',
'uri',
'timestamp',
'content',
'enclosures',
'categories',
'uid',
];
public function stringify()
{
$urlPrefix = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') ? 'https://' : 'http://';
$urlHost = (isset($_SERVER['HTTP_HOST'])) ? $_SERVER['HTTP_HOST'] : '';
$urlPath = (isset($_SERVER['PATH_INFO'])) ? $_SERVER['PATH_INFO'] : '';
$urlRequest = (isset($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : '';
$extraInfos = $this->getExtraInfos();
$data = [
'version' => 'https://jsonfeed.org/version/1',
'title' => (!empty($extraInfos['name'])) ? $extraInfos['name'] : $urlHost,
'home_page_url' => (!empty($extraInfos['uri'])) ? $extraInfos['uri'] : REPOSITORY,
'feed_url' => $urlPrefix . $urlHost . $urlRequest
];
if (!empty($extraInfos['icon'])) {
$data['icon'] = $extraInfos['icon'];
$data['favicon'] = $extraInfos['icon'];
}
$items = [];
foreach ($this->getItems() as $item) {
$entry = [];
$entryAuthor = $item->getAuthor();
$entryTitle = $item->getTitle();
$entryUri = $item->getURI();
$entryTimestamp = $item->getTimestamp();
$entryContent = $item->getContent() ? $this->sanitizeHtml($item->getContent()) : '';
$entryEnclosures = $item->getEnclosures();
$entryCategories = $item->getCategories();
$vendorFields = $item->toArray();
foreach (self::VENDOR_EXCLUDES as $key) {
unset($vendorFields[$key]);
}
$entry['id'] = $item->getUid();
if (empty($entry['id'])) {
$entry['id'] = $entryUri;
}
if (!empty($entryTitle)) {
$entry['title'] = $entryTitle;
}
if (!empty($entryAuthor)) {
$entry['author'] = [
'name' => $entryAuthor
];
}
if (!empty($entryTimestamp)) {
$entry['date_modified'] = gmdate(DATE_ATOM, $entryTimestamp);
}
if (!empty($entryUri)) {
$entry['url'] = $entryUri;
}
if (!empty($entryContent)) {
if ($this->isHTML($entryContent)) {
$entry['content_html'] = $entryContent;
} else {
$entry['content_text'] = $entryContent;
}
}
if (!empty($entryEnclosures)) {
$entry['attachments'] = [];
foreach ($entryEnclosures as $enclosure) {
$entry['attachments'][] = [
'url' => $enclosure,
'mime_type' => getMimeType($enclosure)
];
}
}
if (!empty($entryCategories)) {
$entry['tags'] = [];
foreach ($entryCategories as $category) {
$entry['tags'][] = $category;
}
}
if (!empty($vendorFields)) {
$entry['_rssbridge'] = $vendorFields;
}
if (empty($entry['id'])) {
$entry['id'] = hash('sha1', $entryTitle . $entryContent);
}
$items[] = $entry;
}
$data['items'] = $items;
/**
* The intention here is to discard non-utf8 byte sequences.
* But the JSON_PARTIAL_OUTPUT_ON_ERROR also discards lots of other errors.
* So consider this a hack.
* Switch to JSON_INVALID_UTF8_IGNORE when PHP 7.2 is the latest platform requirement.
*/
$json = json_encode($data, JSON_PRETTY_PRINT | JSON_PARTIAL_OUTPUT_ON_ERROR);
return $json;
}
private function isHTML($text)
{
return (strlen(strip_tags($text)) != strlen($text));
}
}
|
