public static function refresh_feed($feed_id)
{
$feed = db\get_feed($feed_id);
echo "Refreshing feed " . $feed->feed_url . " ({$feed_id})\n\n";
// check if this feed is already being refreshed, and re-queue the job for 30 seconds from now to give the first job a chance to finish
if ($feed->refresh_in_progress) {
echo "This feed is already being processed, re-queuing for later\n";
DeferredTask::queue('FeedTask', 'refresh_feed', $feed_id, 5);
return;
// return here which will cause the job runner to re-queue the job
}
// mark that this feed is currently being refreshed
$feed->refresh_started = date('Y-m-d H:i:s');
$feed->refresh_in_progress = 1;
$feed->save();
// only deal with mf2 feeds for now
try {
$response = request\get_url($feed->feed_url, true);
$header_rels = IndieWeb\http_rels($response['headers']);
$html = $response['body'];
$mf2 = feeds\parse_mf2($html, $feed->feed_url);
$hub_url = false;
if (k($header_rels, 'hub')) {
$hub_url = $header_rels['hub'][0];
$hub_url_source = 'http';
} elseif (k($mf2, 'rels') && k($mf2['rels'], 'hub')) {
$hub_url = $mf2['rels']['hub'][0];
$hub_url_source = 'html';
}
// check for PuSH info and subscribe to the hub if found
if ($hub_url) {
if (k($header_rels, 'self')) {
$self_url = $header_rels['self'][0];
$self_url_source = 'http';
} elseif (k($mf2, 'rels') && k($mf2['rels'], 'self')) {
$self_url = $mf2['rels']['self'][0];
$self_url_source = 'html';
} else {
$self_url = $feed->feed_url;
$self_url_source = 'default';
}
// Keep track of what the hub URL was last time we saw it
$last_hub_url = $feed->push_hub_url;
// Store the new hub and topic
$feed->push_hub_url = $hub_url;
$feed->push_topic_url = $self_url;
// re-subscribe if the expiration date is coming up soon
// or if the hub has changed
if ($feed->push_subscribed == 0 || $hub_url != $last_hub_url || $feed->push_expiration && strtotime($feed->push_expiration) - 300 < time()) {
echo "Attempting to subscribe to the hub!\n";
echo "Hub: " . $feed->push_hub_url . " (found in {$hub_url_source})\n";
echo "Topic: " . $feed->push_topic_url . " (found in {$self_url_source})\n";
// This will cause the hub to make a GET request to the callback URL which we will to verify
$response = request\post($feed->push_hub_url, ['hub.mode' => 'subscribe', 'hub.topic' => $feed->push_topic_url, 'hub.callback' => 'http://' . Config::$hostname . '/push/feed/' . $feed->hash]);
echo "Hub responded:\n";
echo $response['status'] . "\n";
echo $response['body'] . "\n";
}
$feed->save();
}
// check if there are any h-entry posts
$info = feeds\find_feed_info($mf2);
if ($info) {
#print_r($info);
foreach ($info['entries'] as $i => $e) {
echo "\nProcessing entry {$i}\n";
// Find the canonical URL for the entry and fetch the page
$entry_url = Mf2\getPlaintext($e, 'url');
if ($entry_url) {
echo $entry_url . "\n";
// Parse the entry for all required info and store in the "entries" table
$entry_html = request\get_url($entry_url);
if ($entry_html) {
$entry_mf2 = feeds\parse_mf2($entry_html, $entry_url);
$entries = Mf2\findMicroformatsByType($entry_mf2['items'], 'h-entry');
$entry_mf2 = $entries[0];
if (!Mf2\isMicroformat($entry_mf2)) {
echo "Does not appear to be a microformat\n";
continue;
}
if (!in_array('h-entry', $entry_mf2['type'])) {
print_r($entry_mf2);
continue;
}
if (!($entry = ORM::for_table('entries')->where('feed_id', $feed->id)->where('url', $entry_url)->find_one())) {
$entry = ORM::for_table('entries')->create();
$entry->feed_id = $feed->id;
$entry->url = $entry_url;
}
// Decide whether to store the name, summary and content depending on whether they are unique
$name = Mf2\getPlaintext($entry_mf2, 'name');
$summary = Mf2\getPlaintext($entry_mf2, 'summary');
$content = Mf2\getHtml($entry_mf2, 'content');
$content_text = Mf2\getPlaintext($entry_mf2, 'content');
// Store the name if it's different from the summary and the content
if (!feeds\content_is_equal($name, $summary) && !feeds\content_is_equal($name, $content_text)) {
$entry->name = $name;
echo "Entry has a name: {$name}\n";
} else {
$entry->name = '';
}
// Store the summary if it's different from the content
if ($summary && !feeds\content_is_equal($summary, $content_text)) {
$entry->summary = $summary;
echo "Entry has a summary\n";
} else {
$entry->summary = '';
}
$entry->content = $content;
$date_string = Mf2\getPlaintext($entry_mf2, 'published');
if ($date_string) {
try {
$date = new DateTime($date_string);
if ($date) {
$entry->timezone_offset = $date->format('Z');
$date->setTimeZone(new DateTimeZone('UTC'));
$entry->date_published = $date->format('Y-m-d H:i:s');
echo "Published: {$entry->date_published}\n";
}
} catch (Exception $e) {
echo "Error parsing date: {$date_string}\n";
}
}
// Set the date published to now if none was found in the entry
if (!$entry->date_published) {
$entry->date_published = date('Y-m-d H:i:s');
}
if (Mf2\getPlaintext($entry_mf2, 'like-of')) {
$entry->like_of_url = Mf2\getPlaintext($entry_mf2, 'like-of');
}
if (Mf2\getPlaintext($entry_mf2, 'repost-of')) {
$entry->repost_of_url = Mf2\getPlaintext($entry_mf2, 'repost-of');
}
// TODO: move this to a helper
// finds the URL for a property if the property is a plain string or a nested h-cite
if (Mf2\getPlaintext($entry_mf2, 'in-reply-to')) {
if (Mf2\isMicroformat($entry_mf2['properties']['in-reply-to'][0])) {
$entry->in_reply_to_url = $entry_mf2['properties']['in-reply-to'][0]['properties']['url'][0];
} else {
$entry->in_reply_to_url = Mf2\getPlaintext($entry_mf2, 'in-reply-to');
}
}
if (Mf2\getPlaintext($entry_mf2, 'photo')) {
$entry->photo_url = Mf2\getPlaintext($entry_mf2, 'photo');
}
if (Mf2\getPlaintext($entry_mf2, 'video')) {
$entry->video_url = Mf2\getPlaintext($entry_mf2, 'video');
}
if (Mf2\getPlaintext($entry_mf2, 'audio')) {
$entry->audio_url = Mf2\getPlaintext($entry_mf2, 'audio');
}
$author_mf2 = false;
if (Mf2\hasProp($entry_mf2, 'author')) {
$author_mf2 = $entry_mf2['properties']['author'][0];
} elseif (Mf2\hasProp($info, 'author')) {
$author_mf2 = $info['properties']['author'][0];
}
if ($author_mf2) {
$entry->author_name = Mf2\getPlaintext($author_mf2, 'name');
$entry->author_url = Mf2\getPlaintext($author_mf2, 'url');
$entry->author_photo = Mf2\getPlaintext($author_mf2, 'photo');
} else {
echo "NO AUTHOR WAS FOUND!!\n";
}
if (Mf2\hasProp($entry_mf2, 'like')) {
$entry->num_likes = count($entry_mf2['properties']['like']);
}
if (Mf2\hasProp($entry_mf2, 'repost')) {
$entry->num_reposts = count($entry_mf2['properties']['repost']);
}
if (Mf2\hasProp($entry_mf2, 'comment')) {
$entry->num_comments = count($entry_mf2['properties']['comment']);
}
if (Mf2\hasProp($entry_mf2, 'rsvp')) {
$entry->num_rsvps = count($entry_mf2['properties']['rsvp']);
}
$entry->date_retrieved = date('Y-m-d H:i:s');
$entry->date_updated = date('Y-m-d H:i:s');
$entry->save();
// Add or update all tags for this entry
if (Mf2\hasProp($entry_mf2, 'category')) {
$entry_tags = array_unique(array_map(function ($c) {
return strtolower(trim($c, '#'));
}, $entry_mf2['properties']['category']));
foreach ($entry_tags as $tag) {
if (!ORM::for_table('entry_tags')->where('entry_id', $entry->id)->where('tag', $tag)->find_one()) {
$et = ORM::for_table('entry_tags')->create();
$et->entry_id = $entry->id;
$et->tag = $tag;
$et->save();
}
}
} else {
$entry_tags = array();
}
// TODO: Remove tags that are no longer found in the entry
// Add syndication URLs
if (Mf2\hasProp($entry_mf2, 'syndication')) {
$syndications = array_unique($entry_mf2['properties']['syndication']);
foreach ($syndications as $syn) {
if (!ORM::for_table('entry_syndications')->where('entry_id', $entry->id)->where('syndication_url', $syn)->find_one()) {
$es = ORM::for_table('entry_syndications')->create();
$es->entry_id = $entry->id;
$es->syndication_url = $syn;
$es->save();
}
}
}
// TODO: Remove urls that are no longer found in the entry
// Run through all the channels that have this feed and add the entry to each channel
$sources = ORM::for_table('channel_sources')->where('feed_id', $feed_id)->find_many();
foreach ($sources as $source) {
#$channel = ORM::for_table('channel')->where('id',$source->channel_id)->find_one();
$add = false;
if ($source->filter) {
$tags = explode(',', $source->filter);
foreach ($tags as $tag) {
if (preg_match('/\\b' . $tag . '\\b/', $entry->content . "\n" . $entry->name . "\n" . $entry->summary)) {
$add = true;
}
if (in_array(strtolower($tag), $entry_tags)) {
$add = true;
}
}
} else {
$add = true;
}
if ($add) {
$ce = ORM::for_table('channel_entries')->where('channel_id', $source->channel_id)->where('entry_id', $entry->id)->find_one();
if (!$ce) {
$ce = ORM::for_table('channel_entries')->create();
$ce->channel_id = $source->channel_id;
$ce->entry_id = $entry->id;
}
$ce->entry_published = $entry->date_published;
$ce->date_created = date('Y-m-d H:i:s');
$ce->save();
echo "Adding to channel\n";
}
}
} else {
// Bad response returned, might be 410 deleted
// TODO: Figure out if it's a deleted post or just temporary error
}
} else {
echo "No URL was found for this entry\n";
}
}
}
$feed->last_retrieved = date('Y-m-d H:i:s');
} catch (Exception $e) {
echo "Error processing feed!\n";
echo $e->getMessage() . "\n";
echo $e->getTraceAsString() . "\n";
}
// mark complete
// TODO: add some exception handling that will set this to 0 on errors?
$feed->refresh_in_progress = 0;
$feed->save();
}
});
$app->post('/channels/discover', function ($format = 'json') use($app) {
if ($user = require_login_json($app)) {
$params = $app->request()->params();
// $feeds = array(
// array('url' => 'http://pk.dev/', 'display_url' => friendly_url('http://pk.dev/'), 'type' => 'microformats2'),
// array('url' => 'http://pk.dev/articles.atom', 'display_url' => friendly_url('http://pk.dev/articles.atom'), 'type' => 'atom')
// );
$feeds = [];
// Parse the URL and check for microformats h-entry posts, as well as linked rss or atom feeds
$html = request\get_url($params['url']);
$url = normalize_url($params['url']);
if ($html) {
$mf2 = feeds\parse_mf2($html, $params['url']);
// check if there are any h-entry posts
$feed = feeds\find_feed_info($mf2);
if ($feed) {
$feeds[] = ['url' => $url, 'display_url' => friendly_url($url), 'icon' => '<i class="icon-microformats"></i>', 'enabled' => true];
}
$alternates = feeds\get_alternates($mf2);
foreach ($alternates as $alt) {
$feeds[] = ['url' => $alt['url'], 'display_url' => friendly_url($alt['url']), 'icon' => '<i class="fa fa-rss"></i>', 'enabled' => false];
}
}
json_response($app, ['feeds' => $feeds]);
}
});
$app->post('/channels/add_feed', function ($format = 'json') use($app) {
if ($user = require_login_json($app)) {
$params = $app->request()->params();
// Add the feed if it's not already in the database