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-rw-r--r--ssh/app/Libraries/Helper.php303
1 files changed, 303 insertions, 0 deletions
diff --git a/ssh/app/Libraries/Helper.php b/ssh/app/Libraries/Helper.php
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+++ b/ssh/app/Libraries/Helper.php
@@ -0,0 +1,303 @@
+<?php
+namespace App\Libraries;
+use App\Libraries\Helper;
+use Carbon\Carbon;
+use Rumenx\Feed\FeedFactory;
+
+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;
+ }
+ $feed_title .= " | mostdiscussed.com";
+
+ // 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);
+ $feed->setSubtitle($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 = "<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> | ";
+ $discussions .= Helper::formatTimestamp($dis->posted_on) . " | " . $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
+ $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', $excerpt);
+ echo "<pre>";
+ echo "-----------------------";
+ var_dump($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 $content;
+
+ echo "<pre>";
+ while ( mb_strlen($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;
+ }
+}