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<?php
namespace Zotlabs\Lib;
class ActivityStreams2 {
public $data;
public $valid = false;
public $id = '';
public $type = '';
public $actor = null;
public $obj = null;
public $tgt = null;
function __construct($string) {
$this->data = json_decode($string,true);
if($this->data) {
$this->valid = true;
}
if($this->is_valid()) {
$this->id = $this->get_property_obj('id');
$this->type = $this->get_primary_type();
$this->actor = $this->get_compound_property('actor');
$this->obj = $this->get_compound_property('object');
$this->tgt = $this->get_compound_property('target');
}
}
function is_valid() {
return $this->valid;
}
function get_property_obj($property,$base = '') {
if(! $base) {
$base = $this->data;
}
return $base[$property];
}
function fetch_property($url) {
$redirects = 0;
$x = z_fetch_url($url,true,$redirects,
['headers' => [ 'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"']]);
if($x['success'])
return json_decode($x['body'],true);
return null;
}
function get_compound_property($property,$base = '') {
$x = $this->get_property_obj($property,$base);
if($this->is_url($x)) {
$x = $this->fetch_property($x);
}
return $x;
}
function is_url($url) {
if(($url) && (! is_array($url)) && (strpos($url,'http') === 0)) {
return true;
}
return false;
}
function get_primary_type($base = '') {
if(! $base)
$base = $this->data;
$x = $this->get_property_obj('type',$base);
if(is_array($x)) {
foreach($x as $y) {
if(strpos($y,':') === false) {
return $y;
}
}
}
return $x;
}
function debug() {
$x = var_export($this,true);
return $x;
}
}
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