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<?php
namespace BigPipe;
class Pagelet {
private $ID = NULL;
private $HTML = '';
private $JSCode = [];
private $JSFiles = [];
private $CSSFiles = [];
private $phaseDoneJS = [];
private $tagname = 'div';
private static $count = 0;
#===============================================================================
# Priorities for pagelet sorting
#===============================================================================
const PRIORITY_HIGHEST = 100;
const PRIORITY_HIGH = 75;
const PRIORITY_NORMAL = 50;
const PRIORITY_LOW = 25;
const PRIORITY_LOWEST = 0;
#===============================================================================
# Phase numbers for PhaseDoneJS
#===============================================================================
const PHASE_ARRIVE = 0; # After the pagelet reached BigPipe
const PHASE_LOADCSS = 1; # After all the CSS resources have been loaded
const PHASE_PUTHTML = 2; # After the HTML content has been injected into the placeholders
const PHASE_LOADJS = 3; # After all the JS resources have been loaded
const PHASE_EXECJS = 4; # After the static JS code has been executed
public function __construct($customID = NULL, $priority = self::PRIORITY_NORMAL) {
$this->phaseDoneJS = array_pad($this->phaseDoneJS, 5, []);
$this->ID = is_string($customID) ? $customID : 'P'.++self::$count;
BigPipe::addPagelet($this, $priority);
}
#===============================================================================
# Return the unique ID
#===============================================================================
public function getID() {
return $this->ID;
}
#===============================================================================
# Return the HTML content
#===============================================================================
public function getHTML() {
return $this->HTML;
}
#===============================================================================
# Return the CSS resources
#===============================================================================
public function getCSSFiles() {
return $this->CSSFiles;
}
#===============================================================================
# Return the JS resources
#===============================================================================
public function getJSFiles() {
return $this->JSFiles;
}
#===============================================================================
# Return the main JS code
#===============================================================================
public function getJSCode() {
return $this->JSCode;
}
#===============================================================================
# Add HTML or attach more
#===============================================================================
public function addHTML($HTML) {
return $this->HTML .= $HTML;
}
#===============================================================================
# Attach a CSS resource
#===============================================================================
public function addCSS($href) {
return $this->CSSFiles[] = $href;
}
#===============================================================================
# Attach a JS resource
#===============================================================================
public function addJS($href) {
return $this->JSFiles[] = $href;
}
#===============================================================================
# Attach a main JS code part
#===============================================================================
public function addJSCode($code) {
return $this->JSCode[] = $code;
}
#===============================================================================
# Attach a PhaseDoneJS callback
#===============================================================================
public function addPhaseDoneJS($phase, $callback) {
return $this->phaseDoneJS[$phase][] = removeLineBreaksAndTabs($callback);
}
#===============================================================================
# Return all registered PhaseDoneJS callbacks
#===============================================================================
public function getPhaseDoneJS() {
return $this->phaseDoneJS;
}
#===============================================================================
# Set custom placeholder tagname
#===============================================================================
public function setTagname($tagname) {
return $this->tagname = $tagname;
}
#===============================================================================
# Magic method: __toString()
#===============================================================================
public function __toString() {
$pageletHTML = "<{$this->tagname} id=\"{$this->getID()}\">";
$pageletHTML .= !BigPipe::isEnabled() ? $this->getHTML() : NULL;
$pageletHTML .= "</{$this->tagname}>";
return $pageletHTML;
}
}
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