<?php

class SystemServices {
    
     
    function loadInst()
        {
           static $inst = null;
       
            if ($inst === null) {
            $inst = new self;
            }
            return $inst;
        }
        
     function module_loaded()
        {
            self::API_Register();
            return true;
        }
        
     function API_Register()
        {
           apiql::register("!SYSTEM/!INSTALL/!PACKAGE[json]", "SystemServices::InstallPackage");
           apiql::register("!SYSTEM/!REMOVE/!PACKAGE[json]", "SystemServices::RemovePackage");
           apiql::register("!SYSTEM/!CLEAN/!PACKAGES", "SystemServices::CleanPackages");
        }
    
    function CleanPackages()
    {
                $process = new React\ChildProcess\Process('exec apt-get clean');
                $process->on('exit', function($exitCode, $termSignal) {
                   global $clients;
                    if($exitCode > 0)
                    {
                        $ResponseArray = array("response_type"=>"error",
                                               "response_msg"=>"Package cache cleanup failed.",
                                               "apt_exit_code"=>$exitCode,
                                               "error_code"=>"APT_500C");
                        
                    } else {
                        $ResponseArray = array("response_type"=>"success",
                                               "response_msg"=>"Package cache cleanup succeeded.",
                                               "apt_exit_code"=>$exitCode,
                                               "response_code"=>"APT_200C");
                    }
                    foreach($clients as $client)
                    {
                        $client->write(json_encode($ResponseArray)."\r\n");
                    }
                    return json_encode($ResponseArray);
                });
                $process->start($loop);

    }

    function InstallPackage($sql)
        {
            global $loop;
            $Package = $sql['PACKAGE']['packages'];
            #$Reinstall = $sql['REINSTALL'];
            if(is_array($Package))
            {
                foreach($Package as $value)
                {
                    if(empty($PackageLine))
                    {
                        $PackageLine = $value;
                    } else {
                        $PackageLine .= " ".$value;
                    }
                    
                }
            } else {
                $PackageLine = $Package;
            }
                $process = new React\ChildProcess\Process('exec apt-get -y install '.$PackageLine);
                $process->on('exit', function($exitCode, $termSignal) {
                   global $clients;
                    if($exitCode > 0)
                    {
                        $ResponseArray = array("response_type"=>"error",
                                               "response_msg"=>"Package installation failed.",
                                               "apt_exit_code"=>$exitCode,
                                               "error_code"=>"APT_500I");
                        
                    } else {
                        $ResponseArray = array("response_type"=>"success",
                                               "response_msg"=>"Package installation succeeded.",
                                               "apt_exit_code"=>$exitCode,
                                               "response_code"=>"APT_200I");
                    }
                    foreach($clients as $client)
                    {
                        $client->write(json_encode($ResponseArray)."\r\n");
                    }
                    return json_encode($ResponseArray);
                });
                $process->start($loop);
            }
            
        function RemovePackage($sql)
        {
            global $loop;
            $Package = $sql['PACKAGE']['packages'];
            #$Reinstall = $sql['REINSTALL'];
            if(is_array($Package))
            {
                foreach($Package as $value)
                {
                    if(empty($PackageLine))
                    {
                        $PackageLine = $value;
                    } else {
                        $PackageLine .= " ".$value;
                    }
                    
                }
            } else {
                $PackageLine = $Package;
            }
                $process = new React\ChildProcess\Process('exec apt-get -y remove '.$PackageLine);
                $process->on('exit', function($exitCode, $termSignal) {
                   global $clients;
                    if($exitCode > 0)
                    {
                        $ResponseArray = array("response_type"=>"error",
                                               "response_msg"=>"Package removal failed.",
                                               "apt_exit_code"=>$exitCode,
                                               "error_code"=>"APT_500R");
                        
                    } else {
                        $ResponseArray = array("response_type"=>"success",
                                               "response_msg"=>"Package removal succeeded.",
                                               "apt_exit_code"=>$exitCode,
                                               "response_code"=>"APT_200R");
                    }
                    foreach($clients as $client)
                    {
                        $client->write(json_encode($ResponseArray)."\r\n");
                    }
                    return json_encode($ResponseArray);
                });
                $process->start($loop);
            }            
            
}