Tix

tix.php

#!/usr/bin/env php
<?php

/**
 * Tix
 * 
 * A very tiny event loop that emulates node.js main loop
 */
class Tix extends stdClass
{
    private $queue;
    private $filename;

    /**
     *  Constructor
     * 
     * @param   string  $filename
     */
    public function __construct($filename) {
        ! is_file($filename) && die("File {$filename} isn't exists");

        $this->queue = new SplQueue;
        $this->filename = $filename;
    }

    public function import($filename, $as) {
        if ( ! is_file($filename) ) {
            throw new Exception("The {$filename} isn't found!");
        }

        $this->{$as} = require($filename);
        return $this->{$as};
    }

    /**
     *  Push a new function into the main loop
     * 
     * @param   Closure  $fn
     * @return  void
     */
    public function push(Closure $fn): void {
        $this->queue->enqueue($fn);
    }

    /**
     * Loop
     * 
     * @return void
     */
    public function loop(): void {

        $filename = $this->filename;

        ((function() use($filename) {
            require($filename);
            return $this;
        })->bindTo($this))();

        while ( true ) {
            while (! $this->queue->isEmpty()) {
                (($this->queue->pop())->bindTo($this))();
                usleep(200000);
            }
            usleep(200000);
        }
    }
}

/**
 * Push the specified function(s) into the main loop
 */
function tixify(Closure ...$fn): Tix {
    global $tix;
    foreach ( $fn as $f ) {
        $tix->push($f);
    }
    return $tix;
}

/**
 * Construct the Tix main loop
 */
$tix = new Tix(
    $argv[1] ?? die("empty filename specified")
);

/**
 * Run the main loop
 */
$tix->loop();