851 lines
22 KiB
PHP
851 lines
22 KiB
PHP
<?php
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/**
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* Viewdata/Videotex Server
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*
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* Inspired by Rob O'Donnell at irrelevant.com
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*/
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namespace App\Console\Commands;
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use App\Classes\Frame;
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use Illuminate\Console\Command;
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use Illuminate\Database\Eloquent\ModelNotFoundException;
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use Illuminate\Support\Facades\Log;
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use Sock\{SocketClient,SocketServer,SocketException};
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class Server extends Command
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{
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// Size of Bottom Line Pollution
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private $blp = 0;
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/**
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* The name and signature of the console command.
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*
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* @var string
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*/
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protected $signature = 'server';
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/**
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* The console command description.
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*
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* @var string
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*/
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protected $description = 'Start Videotex Server';
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/**
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* Create a new command instance.
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Execute the console command.
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*
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* @return mixed
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* @throws \Sock\SocketException
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*/
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public function handle()
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{
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/**
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* Check dependencies
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*/
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if (! extension_loaded('sockets' ) ) {
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throw new SocketException(SocketException::CANT_ACCEPT,'Missing sockets extension');
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}
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if (! extension_loaded('pcntl' ) ) {
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throw new SocketException(SocketException::CANT_ACCEPT,'Missing pcntl extension');
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}
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define('MSG_TIMEWARP_ON', WHITE . 'TIMEWARP ON' . GREEN . 'VIEW INFO WITH *02');
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define('MSG_TIMEWARP_OFF', WHITE . 'TIMEWARP OFF' . GREEN . 'VIEWING DATE IS FIXED');
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define('MSG_TIMEWARP_TO', GREEN . 'TIMEWARP TO %s');
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define('MSG_TIMEWARP', WHITE . 'OTHER VERSIONS EXIST' . GREEN . 'KEY *02 TO VIEW');
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$server = new SocketServer(config('app.port'),config('app.bind'));
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$server->init();
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$server->setConnectionHandler([$this,'onConnect']);
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$server->listen();
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}
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/**
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* Connection handler
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*
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* @todo: Pressing * three times gets "Shouldnt get here".
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*/
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function onConnect(SocketClient $client) {
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Log::info('Connection from: ',['client'=>$client->getAddress()]);
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$pid = pcntl_fork();
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if ($pid == -1)
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throw new SocketException(SocketException::CANT_ACCEPT,'Could not fork process');
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// Parent return ready for next connection
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elseif ($pid)
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return;
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// We are now the child.
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try {
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$session_init = $session_option = FALSE;
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$session_note = ''; // TCP Session Notice
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$session_term = ''; // TCP Terminal Type
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$client->send(TCP_IAC . TCP_DO . TCP_OPT_SUP_GOAHEAD); // DO SUPPRES GO AHEAD
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$client->send(TCP_IAC . TCP_WONT . TCP_OPT_LINEMODE); // WONT LINEMODE
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$client->send(TCP_IAC . TCP_DO . TCP_OPT_ECHO); // DO ECHO
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// $client->send(TCP_IAC.TCP_AYT); // AYT
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$client->send(TCP_IAC . TCP_DO . TCP_OPT_TERMTYPE . TCP_IAC . TCP_SB . TCP_OPT_TERMTYPE . TCP_OPT_ECHO . TCP_IAC . TCP_SE); // Request Term Type
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$client->send(CLS);
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// Setup VARS
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$timewarp = FALSE; // Is timewarp active.
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$timewarpalt = FALSE; // Alternative timewarp frame to get
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$history = collect(); // Page history for going backwards
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$action = ACTION_GOTO; // Initial action.
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$cmd = ''; // Current *command being typed in
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$mode = FALSE; // Current mode.
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$current = []; // Attributes about the current page
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// field/fieldnum indexes are for fields on the active page
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$current['fieldreset'] = FALSE; // Flag to reset position (used in fields)
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$current['fieldpos'] = 0; // For current field, position within.
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$current['prevmode'] = FALSE; // Previous mode - in case we need to go back to MODE_FIELD
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// @todo Get the login/start page, and if it is not available, throw the ERR_DATEBASE error.
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if (isset($config['loginpage'])) {
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$page = ['frame'=>$config['loginpage'],'index'=>'a'];
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} else if (!empty($service['start_page'])) {
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$page = ['frame'=>$service['start_page'],'index'=>'a'];
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} else {
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$page = ['frame'=>'98','index'=>'a']; // next page
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}
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while ($action != ACTION_TERMINATE) {
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// Read a character from the client session
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$read = $client->read(1);
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if ($read != '') {
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dump(sprintf('Mode: [%s] CMD: [%s] frame: [%s] Received [%s (%s)]', $mode, $cmd, $page['frame'].$page['index'], $read, ord($read)));
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// Client initiation input
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// TELNET http://pcmicro.com/netfoss/telnet.html
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if ($read == TCP_IAC OR $session_init OR $session_option) {
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Log::debug(sprintf('Session Char (%s)', ord($read)), ['init' => $session_init, 'option' => $session_option]);
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switch ($read) {
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// Command being sent.
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case TCP_IAC:
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$session_init = TRUE;
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$session_note = 'IAC ';
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continue 2;
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case TCP_SB:
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$session_option = TRUE;
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continue 2;
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case TCP_SE:
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$session_option = $session_init = FALSE;
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Log::debug('Session Terminal: ' . $session_term);
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break;
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case TCP_DO:
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$session_note .= 'DO ';
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continue 2;
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case TCP_WILL:
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$session_note .= 'WILL ';
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continue 2;
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case TCP_WONT:
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$session_note .= 'WONT ';
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continue 2;
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case TCP_OPT_TERMTYPE:
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continue 2;
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case TCP_OPT_ECHO:
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$session_note .= 'ECHO';
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$session_init = FALSE;
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$read = '';
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Log::debug($session_note);
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continue;
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case TCP_OPT_SUP_GOAHEAD:
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$session_note .= 'SUPPRESS GO AHEAD';
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$session_init = FALSE;
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$read = '';
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Log::debug($session_note);
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continue;
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default:
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if ($session_option AND $read) {
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$session_term .= $read;
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$read = '';
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} else {
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Log::debug(sprintf('Unhandled char in session_init :%s (%s)', $read, ord($read)));
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}
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}
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}
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switch ($mode) {
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// Key presses during field input.
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case MODE_FIELD:
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dump(sprintf('** Processing Keypress in MODE_FIELD [%s (%s)]. Last POS [%s]',$read,ord($read),$current['fieldpos']));
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$cmd = '';
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$action = FALSE;
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switch ($fo->type()) {
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// Response frame.
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case 'a':
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switch ($read) {
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// End of field entry.
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case HASH:
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// Next Field
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$current['fieldnum']++;
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$current['fieldpos'] = 0;
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if ($current['fieldnum'] < $fo->fields->count()) {
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$current['fieldnum'] = $fo->getFieldId('edit',$current['fieldnum']);
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if ($current['fieldnum'] !== FALSE) {
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$current['field'] = $fo->getField($current['fieldnum']);
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$fielddata[$current['fieldnum']] = '';
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$client->send($this->outputPosition($current['field']->x,$current['field']->y).CON);
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$mode = MODE_FIELD;
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$fielddate[$current['fieldnum']] = '';
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// There were no (more) editable fields.
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} else {
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$action = ACTION_SUBMITRF;
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}
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} else {
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// Finished all editable fields.
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$action = ACTION_SUBMITRF;
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}
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break;
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case STAR:
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$current['prevmode'] = MODE_FIELD;
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$action = ACTION_STAR;
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$current['fieldpos'] = 0;
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$fielddata[$current['fieldnum']] = '';
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break;
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case KEY_LEFT:
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if ($current['fieldpos']--)
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$client->send(LEFT);
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break;
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case KEY_RIGHT:
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if ($current['fieldpos']++ < $current['field']->length)
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$client->send(RIGHT);
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break;
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case KEY_DOWN:
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if ($current['fieldpos'] + 40 < $current['field']->length) {
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$client->send(DOWN);
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$current['fieldpos'] = $current['fieldpos'] + 40;
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};
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break;
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case KEY_UP:
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if ($current['fieldpos'] - 40 >= 0) {
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$client->send($read);
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$current['fieldpos'] = $current['fieldpos'] - 40;
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};
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break;
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case CR:
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// On second or later line of a field
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if ($current['fieldpos'] + $current['field']->x > 40) {
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$client->send($read);
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$current['fieldpos'] = (($current['fieldpos'] + $current['field']->x) % 40) * 40;
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} else {
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$client->send($this->outputPosition($current['field']->x,$current['field']->y).CON);
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$current['fieldpos'] = 0;
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}
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break;
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case ESC:
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break;;
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// Record Data Entry
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default:
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if (ord($read) > 31 && $current['fieldpos'] < $current['field']->length) {
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$fielddata[$current['fieldnum']]{$current['fieldpos']} = $read;
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$current['fieldpos']++;
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$client->send($read);
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}
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}
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break;
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// Other Frame Types - Shouldnt get here.
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default:
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$client->close();
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throw new \Exception('Shouldnt get here', 500);
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}
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break;
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// Form submission: 1 to send, 2 not to send.
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case MODE_SUBMITRF:
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switch ($read) {
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// @todo Input received, process it.
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case '1':
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// dump(['line'=>__LINE__,'s' => $service, 'f' => $fielddata]);
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// @todo if send successful or not
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if (TRUE) {
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$this->sendBaseline($client,MSG_SENT);
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$mode = MODE_RFSENT;
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} else {
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$this->sendBaseline($client,ERR_NOTSENT);
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$mode = MODE_RFERROR;
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}
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break;
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case '2':
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$this->sendBaseline($client,MSG_NOTSENT);;
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$mode = MODE_RFNOTSENT;
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break;
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case STAR:
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$action = ACTION_STAR;
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break;
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}
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break;
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// Response form after Sent processing
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case MODE_RFSENT:
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$client->send(COFF);
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if ($read == HASH) {
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if (! empty($pagedata['route1'])) {
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$action = ACTION_GOTO;
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$page['frame'] = $pagedata['route1'];
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$page['index'] = 'a';
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} elseif (\App\Models\Frame::where('frame',$fo->frame())->where('index',$fo->index_next())->exists()) {
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$action = ACTION_GOTO;
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$page['frame'] = array_get($current,'page.frame');
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$page['index'] = chr(1 + ord($page['index']));
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} elseif (! empty($pagedata['route0'])) {
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$action = ACTION_GOTO;
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$page['frame'] = $pagedata['route0'];
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$page['index'] = 'a';
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// No further routes defined, go home.
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} else {
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$action = ACTION_GOTO;
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$page['frame'] = '0';
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$page['index'] = 'a';
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}
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} elseif ($read == STAR) {
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$action = ACTION_STAR;
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break;
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}
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break;
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// Response form after NOT sending
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case MODE_RFNOTSENT:
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// Response form ERROR
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case MODE_RFERROR:
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$client->send(COFF);
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if ($read == HASH) {
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if (! empty($pagedata['route2'])) {
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$action = ACTION_GOTO;
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$page['frame'] = $pagedata['route2'];
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$page['index'] = 'a';
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} elseif (\App\Models\Frame::where('frame',$fo->frame())->where('index',$fo->index_next())->exists()) {
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$action = ACTION_GOTO;
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$page['frame'] = $fo->frame();
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$page['index'] = $fo->index_next();
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} elseif (! empty($pagedata['route0'])) {
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$action = ACTION_GOTO;
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$page['frame'] = $pagedata['route0'];
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$page['index'] = 'a';
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// No further routes defined, go home.
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} else {
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$action = ACTION_GOTO;
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$page['frame'] = '0';
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$page['index'] = 'a';
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}
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} elseif ($read == STAR) {
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$action = ACTION_STAR;
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break;
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}
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break;
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// List of alternate frames has been presented
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case MODE_WARPTO:
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if (is_numeric($read) AND $read) {
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$timewarpalt = $alts->get($read-1)->id;
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$action = ACTION_GOTO;
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} elseif ($read === '0') {
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$action = ACTION_RELOAD;
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}
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break;
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// Not doing anything in particular.
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case MODE_COMPLETE:
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case FALSE:
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Log::debug('Idle', ['pid' => $pid]);
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$cmd = '';
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switch ($read) {
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case HASH:
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$action = ACTION_NEXT;
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break;
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case STAR:
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$action = ACTION_STAR;
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break;
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// Frame Routing
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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if ($frame = $fo->route($read)) {
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$action = ACTION_GOTO;
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} else {
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$this->sendBaseline($client,ERR_ROUTE);
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$mode = $action = FALSE;
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}
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break;
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}
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break;
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// Currently accepting baseline input after a * was received
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case MODE_BL:
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echo "was waiting for page number\n";
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// if it's a number, continue entry
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if (strpos('0123456789', $read) !== FALSE) {
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$cmd .= $read;
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$client->send($read);
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$this->blp++;
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}
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// if we hit a special numeric command, deal with it.
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// Refresh page
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if ($cmd === '00') {
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$client->send(COFF);
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$action = ACTION_RELOAD;
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$cmd = '';
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break;
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}
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// Toggle Timewarp Mode
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if ($cmd === '01') {
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$client->send(COFF);
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$timewarp = !$timewarp;
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$this->sendBaseline($client,($timewarp ? MSG_TIMEWARP_ON : MSG_TIMEWARP_OFF));
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$cmd = '';
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$action = $mode = FALSE;
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break;
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}
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// Present Timewarp Frames
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if ($cmd === '02') {
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$client->send(COFF);
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$action = ACTION_INFO;
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$cmd = '';
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break;
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}
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// Reload page
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if ($cmd === '09') {
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$client->send(COFF);
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$action = ACTION_GOTO;
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$cmd = '';
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break;
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}
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// Another star aborts the command.
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if ($read === STAR) {
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$action = FALSE;
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$this->sendBaseline($client,'');
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$cmd = '';
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if ($current['prevmode'] == MODE_FIELD) {
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$mode = $current['prevmode'];
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$current['prevmode'] = FALSE;
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$client->send($this->outputPosition($current['field']->x,$current['field']->y).CON);
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$client->send(str_repeat('.', $current['field']->length));
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$current['fieldreset'] = TRUE;
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} else {
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$mode = false;
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}
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break;
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}
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// Complete request
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if ($read === HASH) {
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$client->send(COFF);
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$timewarpalt = FALSE;
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// Nothing typed between * and #
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if ($cmd === '') {
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$action = ACTION_BACKUP;
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// *# means go back
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} else {
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$page['frame'] = $cmd;
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$page['index'] = 'a';
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$action = ACTION_GOTO;
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}
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// Clear the command, we are finished processing
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$cmd = '';
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break;
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}
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break;
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default:
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Log::debug('Not sure what we were doing?');
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}
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}
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// This section performs some action if it is deemed necessary
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if ($action) {
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echo "Performing action $action\n";
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}
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switch ($action) {
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case ACTION_STAR:
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echo " star command started\n";
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$this->sendBaseline($client,GREEN.STAR,true);
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$client->send(CON);
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$action = false;
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$mode = MODE_BL;
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break;
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|
|
case ACTION_SUBMITRF:
|
|
$action = false;
|
|
$client->send(COFF);
|
|
$this->sendBaseline($client,MSG_SENDORNOT);
|
|
$mode = MODE_SUBMITRF;
|
|
|
|
break;
|
|
|
|
// GO Backwards
|
|
case ACTION_BACKUP:
|
|
// Do we have anywhere to go, drop the current page from the history.
|
|
if ($history->count() > 1)
|
|
$history->pop();
|
|
|
|
$page = $history->last();
|
|
|
|
Log::debug('Backing up to: '.$page['frame'].$page['index']);
|
|
|
|
// Go to next index frame.
|
|
case ACTION_NEXT:
|
|
// We need this extra test in case we come from ACTION_BACKUP
|
|
if ($action == ACTION_NEXT)
|
|
{
|
|
$current['page']['index'] = $fo->index();
|
|
$page['index'] = $fo->index_next();
|
|
}
|
|
|
|
// Look for requested page
|
|
case ACTION_GOTO:
|
|
// If we wanted a "Searching..." message, this is where to put it.
|
|
|
|
try {
|
|
$fo = $timewarpalt
|
|
? new \App\Classes\Frame(\App\Models\Frame::findOrFail($timewarpalt))
|
|
: (new \App\Models\Frame)->fetch($page['frame'],$page['index']);
|
|
|
|
} catch (ModelNotFoundException $e) {
|
|
$this->sendBaseline($client,ERR_PAGE);
|
|
$mode = $action = FALSE;
|
|
|
|
break;
|
|
}
|
|
|
|
// validate if we have access top it
|
|
/* if (isset($m['access']) && $m['access'] == 'n') {
|
|
$this->sendBaseline($client,ERR_PAGE);
|
|
$mode = $action = false;
|
|
break;
|
|
}
|
|
if (isset($m['cug']) && is_numeric($m['cug']) && $m['cug'] && !in_array($m['cug'],$usercugs)) {
|
|
$this->sendBaseline($client,ERR_PRIVATE);
|
|
$mode = $action = false;
|
|
break;
|
|
}
|
|
*/
|
|
|
|
// we have access...
|
|
//if ($r['varient_id'] != $varient['varient_id']) {
|
|
/* if ($timewarpalt) {
|
|
if (empty($v['varient_date'])) {
|
|
$this->sendBaseline($client,sprintf(MSG_TIMEWARP_TO, 'unknown date'));
|
|
} else {
|
|
$this->sendBaseline($client,sprintf(MSG_TIMEWARP_TO, date('j f Y', strtotime($v['varient_date']))));
|
|
}
|
|
//$varient = array_merge($varient, array_intersect_key($r, $varient));
|
|
$msg = "TIMEWARP";
|
|
dump(['line'=>__LINE__,'write'=>'TIMEWARP MESSAGE']);
|
|
}
|
|
*/
|
|
$current['page'] = $fo->page(TRUE);
|
|
$current['fieldpos'] = 0;
|
|
|
|
// Only if new location, not going backwards
|
|
if (($history->last() != $page) AND ($action == ACTION_GOTO || $action == ACTION_NEXT)) {
|
|
$history->push($page);
|
|
}
|
|
|
|
// drop into
|
|
case ACTION_RELOAD:
|
|
// @todo Move this $output into the object.
|
|
if ($fo->hasFlag('clear'))
|
|
{
|
|
$this->blp = 0;
|
|
$output = CLS;
|
|
|
|
} else {
|
|
$output = HOME
|
|
;
|
|
// Clear the baseline.
|
|
$this->sendBaseline($client,'');
|
|
}
|
|
|
|
$output .= (string)$fo;
|
|
|
|
if ($timewarpalt) {
|
|
$this->sendBaseline($client,sprintf(MSG_TIMEWARP_TO,$fo->created() ? $fo->created()->format('Y-m-d H:i:s') : 'UNKNOWN'));
|
|
}
|
|
|
|
switch ($fo->type()) {
|
|
default:
|
|
// Standard Frame
|
|
case 'i':
|
|
$client->send($output);
|
|
$mode = $action = false;
|
|
break;
|
|
|
|
// Active Frame. Prestel uses this for a Response Frame.
|
|
case 'a':
|
|
$client->send($output);
|
|
// holds data entered by user.
|
|
$fielddata = [];
|
|
|
|
if (count($fo->fields)) {
|
|
// Get our first editable field.
|
|
$current['fieldnum'] = $fo->getFieldId('edit',0);
|
|
$current['field'] = $fo->getField($current['fieldnum']);
|
|
$current['fieldreset'] = TRUE;
|
|
|
|
if ($current['fieldnum'] !== FALSE) {
|
|
$mode = MODE_FIELD;
|
|
|
|
// There were no editable fields.
|
|
} else {
|
|
$mode = MODE_COMPLETE;
|
|
$client->send(COFF);
|
|
}
|
|
|
|
$current['fieldpos'] = 0;
|
|
|
|
} else {
|
|
$mode = FALSE;
|
|
}
|
|
|
|
break;
|
|
|
|
// Terminate Frame
|
|
case 't':
|
|
$client->send($output);
|
|
$action = ACTION_TERMINATE;
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
// Timewarp Mode
|
|
case ACTION_INFO:
|
|
$mode = $action = FALSE;
|
|
$cmd = '';
|
|
$y = 0;
|
|
|
|
$output = $this->outputPosition(0, $y++) . WHITE . NEWBG . RED . 'TIMEWARP INFO FOR Pg.' . BLUE . $fo->page(). WHITE;
|
|
//$output .= $this->outputPosition(0, $y++) . WHITE . NEWBG . BLUE . 'Service : ' . substr($service['service_name'] . str_repeat(' ', 27), 0, 27);
|
|
//$output .= $this->outputPosition(0, $y++) . WHITE . NEWBG . BLUE . 'Varient : ' . substr($varient['varient_name'] . str_repeat(' ', 27), 0, 27);
|
|
$output .= $this->outputPosition(0, $y++) . WHITE . NEWBG . BLUE . 'Dated : ' .substr(($fo->created() ? $fo->created()->format('j F Y') : 'Unknown').str_repeat(' ', 27), 0, 27);
|
|
|
|
$alts = $fo->alts()->get();
|
|
|
|
if (count($alts) > 1) {
|
|
$n = 1;
|
|
|
|
$output .= $this->outputPosition(0, $y++) . WHITE . NEWBG . RED . 'ALTERNATIVE VERSIONS:' . str_repeat(' ', 16);
|
|
|
|
foreach ($alts as $o) {
|
|
$date = $o->created_at->format('d M Y');
|
|
|
|
$line = WHITE.NEWBG;
|
|
|
|
if ($timewarp) {
|
|
$line .= RED.$n++;
|
|
}
|
|
|
|
$line .= BLUE.$date.' '.$o->note;
|
|
|
|
$output .= $this->outputPosition(0,$y++).$line.str_repeat(' ',40-$this->strlenv($line));
|
|
}
|
|
|
|
if ($timewarp) {
|
|
$mode = MODE_WARPTO;
|
|
}
|
|
|
|
}
|
|
|
|
$client->send($output);
|
|
|
|
break;
|
|
}
|
|
|
|
// We need to reposition the cursor to the current field.
|
|
if ($current['fieldreset'] !== FALSE) {
|
|
$client->send($this->outputPosition($current['field']->x,$current['field']->y).CON);
|
|
$current['fieldreset'] = FALSE;
|
|
}
|
|
|
|
// Did the client disconnect
|
|
if ($read === NULL || socket_last_error()) {
|
|
Log::debug('Disconnected: '.$client->getaddress());
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
// Something bad happened. We'll log it and then disconnect.
|
|
} catch (\Exception $e) {
|
|
Log::emergency($e->getMessage());
|
|
}
|
|
|
|
$client->close();
|
|
Log::debug('Disconnected: '.$client->getaddress());
|
|
}
|
|
|
|
/**
|
|
* Move the cursor via the shortest path.
|
|
*/
|
|
function outputPosition($x,$y) {
|
|
// Take the shortest path.
|
|
if ($y < 12) {
|
|
return HOME.
|
|
(($x < 21)
|
|
? str_repeat(DOWN,$y).str_repeat(RIGHT,$x)
|
|
: str_repeat(DOWN,$y+1).str_repeat(LEFT,40-$x));
|
|
|
|
} else {
|
|
return HOME.str_repeat(UP,24-$y).
|
|
(($x < 21)
|
|
? str_repeat(RIGHT,$x)
|
|
: str_repeat(LEFT,40-$x));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send a message to the base line
|
|
*
|
|
* @note "$this->blp" remembers how many chars are there, so that they can be replace with next call
|
|
* @param $client
|
|
* @param $text
|
|
* @param bool $reposition
|
|
*/
|
|
function sendBaseline($client,$text,$reposition=FALSE) {
|
|
$client->send(HOME.UP.$text.
|
|
($this->blp > $this->strlenv($text)
|
|
? str_repeat(' ',$this->blp-$this->strlenv($text)).
|
|
($reposition ? HOME.UP.str_repeat(RIGHT,$this->strlenv($text)) : '')
|
|
: '')
|
|
);
|
|
|
|
$this->blp = $this->strlenv($text);
|
|
}
|
|
|
|
/**
|
|
* Calculate the length of text
|
|
*
|
|
* ESC characters are two chars, and need to be counted as one.
|
|
*
|
|
* @param $text
|
|
* @return int
|
|
* @todo Implement this as a helper
|
|
*/
|
|
function strlenv($text):int {
|
|
return strlen($text)-substr_count($text,ESC);
|
|
}
|
|
} |