format("Y-m-d");
}
public static function makeFeed($model, $title, $cache = 60) {
switch($title) {
case("new"):
$feed_title = 'Newest Articles';
$feed_description = 'Newest interesting articles from Wikipedia. Keep exploring.';
break;
case( "popular"):
$feed_title = 'Popular Articles';
$feed_description = 'The most popular articles. Keep exploring.';
break;
case( "mastodon"):
$feed_title = 'Feed for Mastodon';
$feed_description = 'New articles are published automatically to Mastodon.';
break;
default:
$feed_title = 'Search for: ' . $title;
$feed_description = 'All articles for "' . $title . '".';
break;
}
// create new feed
$feed = FeedFactory::create();
// multiple feeds are supported
// if you are using caching you should set different cache keys for your feeds
// cache the feed for $cache minutes (second parameter is optional)
$feed->setCache($cache, 'feed_' . $title);
// check if there is cached feed and build new only if is not
if (!$feed->isCached())
{
// set your feed's title, description, link, pubdate and language
$feed->setTitle($feed_title);
$feed->setDescription($feed_description);
#$feed->setLogo('http://yoursite.tld/logo.jpg');
$feed->setLink(url('feed/' . $title));
$feed->setDateFormat('datetime'); // 'datetime', 'timestamp' or 'carbon'
$feed->setPubdate($model[0]->created_at);
$feed->setLang('en');
$feed->setShortening(false); // true or false
if ( "mastodon" == $title || "mastodon_test" == $title ) {
$feed->setTextLimit(500); // maximum length of description text
} else {
$feed->setTextLimit(100); // maximum length of description text
}
foreach ($model as $post)
{
$desc = ($post->excerpt_html);
$categories = null;
if ( "mastodon" == $title || "mastodon_test" == $title ) {
$cat_len= 0;
if ( ! $post->getCategories()->get()->isEmpty() ) {
$categories_ar = array("#MostDiscussed");
foreach( $post->getCategories()->get() as $cat ) {
// uppercase for every word in a possible multi worded hashtag
$tmp_cat = ucwords($cat->name);
// strip everything after / for brevity
if ( false !== strpos($tmp_cat, "/") )
$tmp_cat = substr($tmp_cat, 0, strpos($tmp_cat, "/"));
// replace any non-alphanumeric character except underscore, because
// it's not allowed to be used in a hashtag
$tmp_cat = preg_replace("/[^A-Za-z0-9_]/", '', $tmp_cat);
// trim just in case
$tmp_cat = trim($tmp_cat);
// if it's not empty, add it to the hashtag array
if ( "" != $tmp_cat )
$categories_ar[] = "#". $tmp_cat;
}
// remove possible duplicates (because stripping after "/")
$categories_ar = array_unique($categories_ar);
// join to one string
$categories = implode(" ", $categories_ar);
$cat_counter = $post->getCategories()->get()->count();
$cat_len = mb_strlen($categories, "UTF-8");
}
$link = env('APP_URL') . "/article/" . $post->id;
// max desc length is 500 - 23 (Link) - $cat_len - 2 (white spaces)
$max_len = 500 - 23 - $cat_len - 2;
if ( "mastodon_test" == $title ) {
$desc = Helper::mastodon_summary($desc, $max_len);
}else {
$desc = Helper::first_sentence($desc, $max_len);
#$desc = Helper::mastodon_summary($desc, $max_len);
}
$desc .= " " . $categories;# . $discussions;
// set item's title, author, url, pubdate, description, content, enclosure (optional)*
$feed->addItem([
'title' => $desc, // mastofeed.org seems to ignore the description field
'author' => env('APP_NAME'),
'url' => $link,
'link' => $link,
'pubdate' => $post->created_at,
'description' => $desc,
'content' => $desc
]);
} else {
if ( ! $post->getCategories()->get()->isEmpty() ) {
$categories = "
";
foreach( $post->getCategories()->get() as $cat ) {
$categories .= "name) ."'>". $cat->name . " | ";
}
$categories = rtrim($categories, " | ");
$desc .= "
Topics:";
$desc .= $categories;
}
$discussions = "
";
foreach( $post->getDiscussions()->orderBy('comments', 'desc')->get() as $dis ) {
$discussions .= "" . $dis->title . " ";
$discussions .= $dis->upvotes . " Upvotes | " . $dis->comments . " Comments
";
}
$desc .= "
Discussions:";
$desc .= $discussions;
// set item's title, author, url, pubdate, description, content, enclosure (optional)*
$feed->addItem([
'title' => $post->title,
'author' => env('APP_NAME'),
'url' => \URL::to($post->url),
'link' => \URL::to($post->url),
'pubdate' => $post->created_at,
'description' => $desc,
'content' => $desc
]);
}
}
}
// first param is the feed format
// optional: second param is cache duration (value of 0 turns off caching)
// optional: you can set custom cache key with 3rd param as string
$xml = $feed->render('atom', $cache, 'feed_' . $title);
return response($xml, 200, [
'Content-Type' => 'application/xml'
]);
}
public static function first_sentence($content, $max_len = NULL) {
$content = html_entity_decode(strip_tags($content));
$content = ltrim($content);
$pos = strpos($content, '.');
if($pos === false) {
if ( is_null($max_len) ) {
return $content;
} else {
return substr($content, 0, $max_len);
}
}
else {
return substr($content, 0, $pos+1);
}
}
private static function next_sentence($content, $max_len = NULL) {
$content = ltrim($content);
$pos = strpos($content, '.');
if($pos === false) {
if ( is_null($max_len) ) {
return $content;
} else {
return substr($content, 0, $max_len);
}
} else {
return substr($content, 0, $pos+1);
}
}
/**
* Make sure to toot as much text as possible while still staying below the limit of 500 chars -link (23 chars) - 2 (white spaces) - possible hashtags
*/
public static function mastodon_summary($excerpt, $max_len = 475){
/**
* Strip HTML from Wikipedia excerpt
*/
$excerpt = ltrim(html_entity_decode(strip_tags($excerpt)));
/**
* The toot to be returned
*/
$content = "";
/**
* https://stackoverflow.com/questions/16377437/split-a-text-into-sentences
*/
$sentences = preg_split('/(?<=[.?!])\s+(?=[a-z])/i', $excerpt);
echo "";
echo "-----------------------";
var_dump($excerpt);
var_dump($sentences);
for ( $i = 0; $i < count($sentences); $i++ ) {
#if ( mb_strlen($content) < $max_len && (mb_strlen($content) + mb_strlen($sentences) ) {
if ( mb_strlen($content) < $max_len && (mb_strlen($content) + mb_strlen($sentences) ) < $max_len ){
//var_dump(rtrim(ltrim($sentences[$i])));
$content .= rtrim(ltrim($sentences[$i]));
var_dump("ok", $max_len);
$max_len = $max_len - mb_strlen($sentences[$i]);
var_dump("ok", $max_len);
} else {
var_dump("fail", mb_strlen($content), $max_len);
break;
}
}
return $content;
echo "";
while ( mb_strlen($content) < $max_len ) {
/**
* Get next sentence
*/
$next_sentence = Helper::next_sentence($excerpt, $max_len);
var_dump($next_sentence);
if ( "" == $next_sentence ) {
break;
}
/**
* Check if $content + $next_sentence is still under $max_len
*/
if ( (mb_strlen($content) + mb_strlen($next_sentence)) < $max_len ) {
/**
* add text
*/
$content .= $next_sentence;
/**
* Recalc $max_len
*/
$max_len = $max_len - mb_strlen($next_sentence);
/**
* Remove sentence from excerpt
*/
$excerpt = substr($excerpt, mb_strlen($next_sentence));
} else {
break;
}
}
return $content;
}
}