dj_mix_hosting_software/classes/HeaderMeta.php

<?php

namespace DJMixHosting;

use DJMixHosting\Genre;

class HeaderMeta
{

    private $config;
    private $title = "";
    private $description = "";
    private $url = "";
    private $image = "";
    private $type = "";
    private $duration_seconds = "";
    private $musician = "";
    private $audio = "";
    private $keywords = "";
    private $canonical = "";
    private $robot = "";
    private $noindex = "";

    public function __construct($object, $config)
    {
        $this->config = $config;
        // detect if it is DJMixHosting\Mix, DJMixHosting\Genre, DJMixHosting\Mixshow, or DJMixHosting\DJ in $object
        if ($object instanceof Mix) {
            $djs = $object->getDJs();
            $djList = "";
            foreach ($djs as $dj) {
                $djList .= $dj->getName() . ", ";
            }
            $djList = rtrim($djList, ", ");

            $genres = $object->getGenres();
            $genreNames = "";

            $genreList = rtrim($genreNames, ", ");


            $this->set_ogTitle($object->getName());
            $this->set_ogDescription($object->getDescription());
            $this->set_ogUrl($object->getPageUrl());
            $this->set_ogImage($object->getCover());
            $this->set_ogType("music.song");
            $this->set_ogDurationSeconds($object->getSeconds());
            $this->set_ogMusician($djList);
            $this->set_ogAudio($object->getDownloadUrl());
            $this->set_ogKeywords($genreList);
            $this->set_ogCanonical($object->getPageUrl());
            $this->set_ogRobot("index, follow");
            $this->set_ogNoindex("");
        }
    }

    private function set_ogTitle($title)
    {
        $this->title = $title;
    }

    private function set_ogDescription($description)
    {
        $this->description = $description;
    }

    private function set_ogUrl($url)
    {
        $this->url = $url;
    }

    private function set_ogImage($image)
    {
        $this->image = $image;
    }

    private function set_ogType($type)
    {
        $this->type = $type;
    }

    private function set_ogDurationSeconds($duration_seconds)
    {
        $this->duration_seconds = $duration_seconds;
    }

    private function set_ogMusician($musician)
    {
        $this->musician = $musician;
    }

    private function set_ogAudio($audio)
    {
        $this->audio = $audio;
    }

    private function set_ogKeywords($keywords)
    {
        $this->keywords = $keywords;
    }

    private function set_ogCanonical($canonical)
    {
        $this->canonical = $canonical;
    }

    private function set_ogRobot($robot)
    {
        $this->robot = $robot;
    }

    private function set_ogNoindex($noindex)
    {
        $this->noindex = $noindex;
    }

    public function mixMetaOutput()
    {
        global $config;
        $output = $this->buildMeta("og:title", $this->get_ogTitle());
        $output .= $this->buildMeta("og:type", $this->get_ogType());
        $output .= $this->buildMeta("og:url", $this->get_ogUrl());
        $output .= $this->buildMeta("og:image", $this->get_ogImage());
        $output .= $this->buildMeta("og:description", $this->get_ogDescription());
        $output .= $this->buildMeta("og:locale", "en_US");
        $output .= $this->buildMeta("og:site_name", $config['app']['name']);
        $output .= $this->buildMeta("music:duration", $this->get_ogDurationSeconds());
        $output .= $this->buildMeta("music:musician", $this->get_ogMusician());
        $output .= $this->buildMetaName("description", $this->get_ogDescription());
        $output .= $this->buildMeta("og:audio", $this->get_ogAudio());
        $output .= $this->buildMetaName("keywords", $this->get_ogKeywords());
        $output .= $this->buildMeta("canonical", $this->get_ogCanonical());
        $output .= $this->buildMetaName("robots", $this->get_ogRobot());
        $output .= $this->buildMetaName("robots", $this->get_ogNoindex());
        return $output;

    }

    private function buildMeta($property, $content)
    {
        if ($content == "" || $content == null) {
            return "";
        } else {
            return "<meta property=\"$property\" content=\"$content\"/>".PHP_EOL;
        }
    }

    public function get_ogTitle()
    {
        return $this->title;
    }

    public function get_ogType()
    {
        return $this->type;
    }

    public function get_ogUrl()
    {
        return $this->url;
    }

    public function get_ogImage()
    {
        return $this->image;
    }

    public function get_ogDescription()
    {
        return $this->description;
    }

    public function get_ogDurationSeconds()
    {
        return $this->duration_seconds;
    }

    public function get_ogMusician()
    {
        return $this->musician;
    }

    private function buildMetaName($name, $content)
    {
        if ($content == "" || $content == null) {
            return "";
        } else {
            return "<meta name=\"$name\" content=\"$content\"/>" . PHP_EOL;
        }
    }

    public function get_ogAudio()
    {
        return $this->audio;
    }

    public function get_ogKeywords()
    {
        return $this->keywords;
    }

    public function get_ogCanonical()
    {
        return $this->canonical;
    }

    public function get_ogRobot()
    {
        return $this->robot;
    }

    public function get_ogNoindex()
    {
        return $this->noindex;
    }


}