codysnider / tt-rss

classes/feeditem/common.php

<?php
abstract class FeedItem_Common extends FeedItem {
    protected $elem;
    protected $xpath;
    protected $doc;

    public function __construct($elem, $doc, $xpath) {
        $this->elem = $elem;
        $this->xpath = $xpath;
        $this->doc = $doc;

        try {

            $source = $elem->getElementsByTagName("source")->item(0);

            // we don't need <source> element
            if ($source) {
                            $elem->removeChild($source);
            }
        } catch (DOMException $e) {
            //
        }
    }

    public function get_element() {
        return $this->elem;
    }

    public function get_author() {
        $author = $this->elem->getElementsByTagName("author")->item(0);

        if ($author) {
            $name = $author->getElementsByTagName("name")->item(0);

            if ($name) {
                return clean($name->nodeValue);
            }

            $email = $author->getElementsByTagName("email")->item(0);

            if ($email) {
                return clean($email->nodeValue);
            }

            if ($author->nodeValue) {
                            return clean($author->nodeValue);
            }
        }

        $author_elems = $this->xpath->query("dc:creator", $this->elem);
        $authors = [];

        foreach ($author_elems as $author) {
            array_push($authors, clean($author->nodeValue));
        }

        return implode(", ", $authors);
    }

    public function get_comments_url() {
        //RSS only. Use a query here to avoid namespace clashes (e.g. with slash).
        //might give a wrong result if a default namespace was declared (possible with XPath 2.0)
        $com_url = $this->xpath->query("comments", $this->elem)->item(0);

        if ($com_url) {
                    return clean($com_url->nodeValue);
        }

        //Atom Threading Extension (RFC 4685) stuff. Could be used in RSS feeds, so it's in common.
        //'text/html' for type is too restrictive?
        $com_url = $this->xpath->query("atom:link[@rel='replies' and contains(@type,'text/html')]/@href", $this->elem)->item(0);

        if ($com_url) {
                    return clean($com_url->nodeValue);
        }
    }

    public function get_comments_count() {
        //also query for ATE stuff here
        $query = "slash:comments|thread:total|atom:link[@rel='replies']/@thread:count";
        $comments = $this->xpath->query($query, $this->elem)->item(0);

        if ($comments) {
            return clean($comments->nodeValue);
        }
    }

    // this is common for both Atom and RSS types and deals with various media: elements
    public function get_enclosures() {
        $encs = [];

        $enclosures = $this->xpath->query("media:content", $this->elem);

        foreach ($enclosures as $enclosure) {
            $enc = new FeedEnclosure();

            $enc->type = clean($enclosure->getAttribute("type"));
            $enc->link = clean($enclosure->getAttribute("url"));
            $enc->length = clean($enclosure->getAttribute("length"));
            $enc->height = clean($enclosure->getAttribute("height"));
            $enc->width = clean($enclosure->getAttribute("width"));

            $medium = clean($enclosure->getAttribute("medium"));
            if (!$enc->type && $medium) {
                $enc->type = strtolower("$medium/generic");
            }

            $desc = $this->xpath->query("media:description", $enclosure)->item(0);
            if ($desc) {
                $enc->title = clean($desc->nodeValue);
            }

            array_push($encs, $enc);
        }

        $enclosures = $this->xpath->query("media:group", $this->elem);

        foreach ($enclosures as $enclosure) {
            $enc = new FeedEnclosure();

            $content = $this->xpath->query("media:content", $enclosure)->item(0);

            if ($content) {
                $enc->type = clean($content->getAttribute("type"));
                $enc->link = clean($content->getAttribute("url"));
                $enc->length = clean($content->getAttribute("length"));
                $enc->height = clean($content->getAttribute("height"));
                $enc->width = clean($content->getAttribute("width"));

                $medium = clean($content->getAttribute("medium"));
                if (!$enc->type && $medium) {
                    $enc->type = strtolower("$medium/generic");
                }

                $desc = $this->xpath->query("media:description", $content)->item(0);
                if ($desc) {
                    $enc->title = clean($desc->nodeValue);
                } else {
                    $desc = $this->xpath->query("media:description", $enclosure)->item(0);
                    if ($desc) {
                        $enc->title = clean($desc->nodeValue);
                    }
                }

                array_push($encs, $enc);
            }
        }

        $enclosures = $this->xpath->query("media:thumbnail", $this->elem);

        foreach ($enclosures as $enclosure) {
            $enc = new FeedEnclosure();

            $enc->type = "image/generic";
            $enc->link = clean($enclosure->getAttribute("url"));
            $enc->height = clean($enclosure->getAttribute("height"));
            $enc->width = clean($enclosure->getAttribute("width"));

            array_push($encs, $enc);
        }

        return $encs;
    }

    public function count_children($node) {
        return $node->getElementsByTagName("*")->length;
    }

    public function subtree_or_text($node) {
        if ($this->count_children($node) == 0) {
            return $node->nodeValue;
        } else {
            return $node->c14n();
        }
    }

    public static function normalize_categories($cats) {

        $tmp = [];

        foreach ($cats as $rawcat) {
            $tmp = array_merge($tmp, explode(",", $rawcat));
        }

        $tmp = array_map(function($srccat) {
            $cat = clean(trim(mb_strtolower($srccat)));

            // we don't support numeric tags
            if (is_numeric($cat)) {
                            $cat = 't:'.$cat;
            }

            $cat = preg_replace('/[,\'\"]/', "", $cat);

            if (DB_TYPE == "mysql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                $cat = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $cat);
            }

            if (mb_strlen($cat) > 250) {
                            $cat = mb_substr($cat, 0, 250);
            }

            return $cat;
        }, $tmp);

        asort($tmp);

        return array_unique($tmp);
    }
}