ExternalFiles.php

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<?php
namespace Elgg\Assets;


class ExternalFiles {
    private $CONFIG;

    public function __construct(\stdClass $config = null) {
        if (!($config instanceof \stdClass)) {
            $config = new \stdClass();
        }
        $this->CONFIG = $config;
    }
    
    public function register($type, $name, $url, $location, $priority = 500) {
        
    
        if (empty($name) || empty($url)) {
            return false;
        }
    
        $url = elgg_format_url($url);
        $url = elgg_normalize_url($url);

        $this->bootstrap($type);
    
        $name = trim(strtolower($name));
    
        // normalize bogus priorities, but allow empty, null, and false to be defaults.
        if (!is_numeric($priority)) {
            $priority = 500;
        }
    
        // no negative priorities right now.
        $priority = max((int)$priority, 0);
    
        $item = elgg_extract($name, $this->CONFIG->externals_map[$type]);
    
        if ($item) {
            // updating a registered item
            // don't update loaded because it could already be set
            $item->url = $url;
            $item->location = $location;
    
            // if loaded before registered, that means it hasn't been added to the list yet
            if ($this->CONFIG->externals[$type]->contains($item)) {
                $priority = $this->CONFIG->externals[$type]->move($item, $priority);
            } else {
                $priority = $this->CONFIG->externals[$type]->add($item, $priority);
            }
        } else {
            $item = new \stdClass();
            $item->loaded = false;
            $item->url = $url;
            $item->location = $location;
    
            $priority = $this->CONFIG->externals[$type]->add($item, $priority);
        }
    
        $this->CONFIG->externals_map[$type][$name] = $item;
    
        return $priority !== false;
    }
    
    public function unregister($type, $name) {

        $this->bootstrap($type);
    
        $name = trim(strtolower($name));
        $item = elgg_extract($name, $this->CONFIG->externals_map[$type]);
    
        if ($item) {
            unset($this->CONFIG->externals_map[$type][$name]);
            return $this->CONFIG->externals[$type]->remove($item);
        }
    
        return false;
    }
    
    public function load($type, $name) {
        
    
        $this->bootstrap($type);
    
        $name = trim(strtolower($name));
    
        $item = elgg_extract($name, $this->CONFIG->externals_map[$type]);
    
        if ($item) {
            // update a registered item
            $item->loaded = true;
        } else {
            $item = new \stdClass();
            $item->loaded = true;
            $item->url = '';
            $item->location = '';
    
            $this->CONFIG->externals[$type]->add($item);
            $this->CONFIG->externals_map[$type][$name] = $item;
        }
    }
    
    public function getLoadedFiles($type, $location) {
        
    
        if (
            isset($this->CONFIG->externals)
            && isset($this->CONFIG->externals[$type])
            && $this->CONFIG->externals[$type] instanceof \ElggPriorityList
        ) {
            $items = $this->CONFIG->externals[$type]->getElements();
    
            $items = array_filter($items, function($v) use ($location) {
                return $v->loaded == true && $v->location == $location;
            });
            if ($items) {
                array_walk($items, function(&$v, $k){
                    $v = $v->url;
                });
            }
            return $items;
        }
        return array();
    }
    
    protected function bootstrap($type) {

        if (!isset($this->CONFIG->externals)) {
            $this->CONFIG->externals = array();
        }
    
        if (!isset($this->CONFIG->externals[$type]) || !$this->CONFIG->externals[$type] instanceof \ElggPriorityList) {
            $this->CONFIG->externals[$type] = new \ElggPriorityList();
        }
    
        if (!isset($this->CONFIG->externals_map)) {
            $this->CONFIG->externals_map = array();
        }
    
        if (!isset($this->CONFIG->externals_map[$type])) {
            $this->CONFIG->externals_map[$type] = array();
        }
    }
}