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<?php
final class FreshRSS_dotpath_Util
{
/**
* Get an item from an array using "dot" notation.
* Functions adapted from https://stackoverflow.com/a/39118759
* https://github.com/illuminate/support/blob/52e8f314b8043860b1c09e5c2c7e8cca94aafc7d/Arr.php#L270-L305
* Newer version in
* https://github.com/laravel/framework/blob/10.x/src/Illuminate/Collections/Arr.php#L302-L337
*
* @param \ArrayAccess<string,mixed>|array<string,mixed>|mixed $array
* @param string|null $key
* @param mixed $default
* @return mixed
*/
public static function get($array, ?string $key, mixed $default = null) {
if (!static::accessible($array)) {
return static::value($default);
}
/** @var \ArrayAccess<string,mixed>|array<string,mixed> $array */
if ($key === null || $key === '') {
return $array;
}
// Compatibility with brackets path such as `items[0].value`
$key = preg_replace('/\[(\d+)\]/', '.$1', $key);
if ($key === null) {
return null;
}
if (static::exists($array, $key)) {
return $array[$key];
}
if (strpos($key, '.') === false) {
return $array[$key] ?? static::value($default);
}
foreach (explode('.', $key) as $segment) {
if (static::accessible($array) && static::exists($array, $segment)) {
$array = $array[$segment];
} else {
return static::value($default);
}
}
return $array;
}
/**
* Get a string from an array using "dot" notation.
*
* @param \ArrayAccess<string,mixed>|array<string,mixed>|mixed $array
* @param string|null $key
*/
public static function getString($array, ?string $key): ?string {
$result = self::get($array, $key, null);
return is_string($result) ? $result : null;
}
/**
* Determine whether the given value is array accessible.
*
* @param mixed $value
* @return bool
*/
private static function accessible($value): bool {
return is_array($value) || $value instanceof \ArrayAccess;
}
/**
* Determine if the given key exists in the provided array.
*
* @param \ArrayAccess<string,mixed>|array<string,mixed>|mixed $array
* @param string $key
* @return bool
*/
private static function exists($array, string $key): bool {
if ($array instanceof \ArrayAccess) {
return $array->offsetExists($key);
}
if (is_array($array)) {
return array_key_exists($key, $array);
}
return false;
}
/** @param mixed $value */
private static function value($value): mixed {
return $value instanceof Closure ? $value() : $value;
}
/**
* Convert a JSON object to a RSS document
* mapping fields from the JSON object into RSS equivalents
* according to the dot-separated paths
*
* @param array<string> $jf json feed
* @param string $feedSourceUrl the source URL for the feed
* @param array<string,string> $dotPaths dot paths to map JSON into RSS
* @param string $defaultRssTitle Default title of the RSS feed, if not already provided in dotPath `feedTitle`
*/
public static function convertJsonToRss(array $jf, string $feedSourceUrl, array $dotPaths, string $defaultRssTitle = ''): ?string {
if (!isset($dotPaths['item']) || $dotPaths['item'] === '') {
return null; //no definition of item path, but we can't scrape anything without knowing this
}
$view = new FreshRSS_View();
$view->_path('index/rss.phtml');
$view->internal_rendering = true;
$view->rss_url = $feedSourceUrl;
$view->entries = [];
try {
$view->rss_title = isset($dotPaths['feedTitle'])
? (htmlspecialchars(FreshRSS_dotpath_Util::getString($jf, $dotPaths['feedTitle']) ?? '', ENT_COMPAT, 'UTF-8') ?: $defaultRssTitle)
: $defaultRssTitle;
$jsonItems = FreshRSS_dotpath_Util::get($jf, $dotPaths['item']);
if (!is_array($jsonItems) || count($jsonItems) === 0) {
return null;
}
foreach ($jsonItems as $jsonItem) {
$rssItem = [];
$rssItem['link'] = isset($dotPaths['itemUri']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemUri']) ?? '' : '';
if (empty($rssItem['link'])) {
continue;
}
$rssItem['title'] = isset($dotPaths['itemTitle']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemTitle']) ?? '' : '';
$rssItem['author'] = isset($dotPaths['itemAuthor']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemAuthor']) ?? '' : '';
$rssItem['timestamp'] = isset($dotPaths['itemTimestamp']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemTimestamp']) ?? '' : '';
//get simple content, but if a path for HTML content has been provided, replace the simple content with HTML content
$rssItem['content'] = isset($dotPaths['itemContent']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemContent']) ?? '' : '';
$rssItem['content'] = isset($dotPaths['itemContentHTML'])
? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemContentHTML']) ?? ''
: $rssItem['content'];
if (isset($dotPaths['itemTimeFormat']) && is_string($dotPaths['itemTimeFormat'])) {
$dateTime = DateTime::createFromFormat($dotPaths['itemTimeFormat'], $rssItem['timestamp']);
if ($dateTime != false) {
$rssItem['timestamp'] = $dateTime->format(DateTime::ATOM);
}
}
if (isset($dotPaths['itemCategories'])) {
$jsonItemCategories = FreshRSS_dotpath_Util::get($jsonItem, $dotPaths['itemCategories']);
if (is_string($jsonItemCategories) && $jsonItemCategories !== '') {
$rssItem['tags'] = [$jsonItemCategories];
} elseif (is_array($jsonItemCategories) && count($jsonItemCategories) > 0) {
$rssItem['tags'] = [];
foreach ($jsonItemCategories as $jsonItemCategory) {
if (is_string($jsonItemCategory)) {
$rssItem['tags'][] = $jsonItemCategory;
}
}
}
}
$rssItem['thumbnail'] = isset($dotPaths['itemThumbnail']) ? FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemThumbnail']) ?? '' : '';
//Enclosures?
if (isset($dotPaths['itemAttachment'])) {
$jsonItemAttachments = FreshRSS_dotpath_Util::get($jsonItem, $dotPaths['itemAttachment']);
if (is_array($jsonItemAttachments) && count($jsonItemAttachments) > 0) {
$rssItem['attachments'] = [];
foreach ($jsonItemAttachments as $attachment) {
$rssAttachment = [];
$rssAttachment['url'] = isset($dotPaths['itemAttachmentUrl'])
? FreshRSS_dotpath_Util::getString($attachment, $dotPaths['itemAttachmentUrl'])
: '';
$rssAttachment['type'] = isset($dotPaths['itemAttachmentType'])
? FreshRSS_dotpath_Util::getString($attachment, $dotPaths['itemAttachmentType'])
: '';
$rssAttachment['length'] = isset($dotPaths['itemAttachmentLength'])
? FreshRSS_dotpath_Util::get($attachment, $dotPaths['itemAttachmentLength'])
: '';
$rssItem['attachments'][] = $rssAttachment;
}
}
}
if (isset($dotPaths['itemUid'])) {
$rssItem['guid'] = FreshRSS_dotpath_Util::getString($jsonItem, $dotPaths['itemUid']);
}
if (empty($rssItem['guid'])) {
$rssItem['guid'] = 'urn:sha1:' . sha1($rssItem['title'] . $rssItem['content'] . $rssItem['link']);
}
if ($rssItem['title'] != '' || $rssItem['content'] != '' || $rssItem['link'] != '') {
// HTML-encoding/escaping of the relevant fields (all except 'content')
foreach (['author', 'guid', 'link', 'thumbnail', 'timestamp', 'tags', 'title'] as $key) {
if (!empty($rssItem[$key]) && is_string($rssItem[$key])) {
$rssItem[$key] = Minz_Helper::htmlspecialchars_utf8($rssItem[$key]);
}
}
$view->entries[] = FreshRSS_Entry::fromArray($rssItem);
}
}
} catch (Exception $ex) {
Minz_Log::warning($ex->getMessage());
return null;
}
return $view->renderToString();
}
}
|
