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<?php
namespace App\Libraries;
use App\Libraries\Helper;
use Carbon\Carbon;
class Helper {
public static function escapeLike($string){
$search = array('%', '_');
$replace = array('\%', '\_');
$string = str_replace($search, $replace, $string);
$string = explode(" ", $string);
return implode("%", $string);
}
public static function formatTimestamp($timestamp) {
return Carbon::createFromTimestamp($timestamp)->format("Y-m-d");
}
public static function makeFeed($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 = \App::make("feed");
// 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->title = $feed_title;
$feed->description = $feed_description;
#$feed->logo = 'http://yoursite.tld/logo.jpg';
$feed->link = url('feed/' . $title);
$feed->setDateFormat('datetime'); // 'datetime', 'timestamp' or 'carbon'
$feed->pubdate = $model[0]->created_at;
$feed->lang = 'en';
$feed->setShortening(false); // true or false
if ( "mastodon" == $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);
if ( "mastodon" == $title ) {
$cat_len= 0;
if ( ! $post->getCategories()->get()->isEmpty() ) {
$categories = "#MostDiscussed ";
foreach( $post->getCategories()->get() as $cat ) {
$categories .= "#". $cat->name . " ";
}
$cat_counter = $post->getCategories()->get()->count();
$cat_len = mb_strlen($categories, "UTF-8");
}
$discussions = "";
if ( $post->getDiscussions()->orderBy('created_at', 'desc')->get()->count() > 1 ) {
// multiple discussions on HN. show one link where you can find them all
$discussions = env('APP_URL') . "/article/" . $post->id;
} else {
// only on disc link. ### TODO foreach not needed
foreach( $post->getDiscussions()->orderBy('created_at', 'desc')->get() as $dis ) {
$discussions = $dis->source_url;
}
}
// max desc length is 500 - 23 (Link) - $cat_len - 2 (white spaces)
$max_len = 500 - 23 - $cat_len - 2;
$desc = Helper::first_sentence($desc, $max_len);
$desc .= " " . $categories;# . $discussions;
// set item's title, author, url, pubdate, description, content, enclosure (optional)*
$feed->addItem([
'title' => $desc, // mastofeed.org seems to ignore the description field
'author' => env('APP_NAME'),
'url' => \URL::to($post->url),
'link' => \URL::to($post->url),
'pubdate' => $post->created_at,
'description' => $desc,
'content' => $desc
]);
} else {
if ( ! $post->getCategories()->get()->isEmpty() ) {
$categories = "<br>";
foreach( $post->getCategories()->get() as $cat ) {
$categories .= "<a href='". \URL::to('/topic/' . $cat->name) ."'>". $cat->name . "</a> | ";
}
$categories = rtrim($categories, " | ");
$desc .= "<br>Topics:";
$desc .= $categories;
}
$discussions = "<br>";
foreach( $post->getDiscussions()->orderBy('comments', 'desc')->get() as $dis ) {
$discussions .= "<a href='" . $dis->source_url . "'>" . $dis->title . "</a> ";
$discussions .= $dis->upvotes . " Upvotes | " . $dis->comments . " Comments<br>";
}
$desc .= "<br><br>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
return $feed->render('atom', $cache, 'feed_' . $title);
}
public static function first_sentence($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);
}
}
}
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