<?php
require_once 'Pman.php';

/**
 * notification script runner
 *
 * This does not actualy send stuf out, it only starts the NotifySend/{id}
 * which does the actuall notifcations.
 *
 * It manages a pool of notifiers.
 * 
 * 
 */


class Pman_Core_Notify extends Pman
{
    
    static $cli_desc = "Runs the notification queue (usually from cron)
                        Normally used to sends out emails to anyone in the notification list.
    
                        /etc/cron.d/pman-core-notify
                        * *  * * *     www-data     /usr/bin/php /home/gitlive/web.mtrack/admin.php  Core/Notify > /dev/null
    
";
    
    static $cli_opts = array(
        'debug' => array(
            'desc' => 'Turn on debugging (see DataObjects debugLevel )',
            'default' => 0,
            'short' => 'v',
            'min' => 1,
            'max' => 1,
            
        ),
        'list' => array(
            'desc' => 'List message to send, do not send them..',
            'default' => 0,
            'short' => 'l',
            'min' => 0,
            'max' => 0,
            
        ),
        'old' => array(
            'desc' => 'Show old messages.. (and new messages...)',
            'default' => 0,
            'short' => 'o',
            'min' => 0,
            'max' => 0,
            
        ),
        'force' => array(
            'desc' => 'Force redelivery, even if it has been sent before or not queued...',
            'default' => 0,
            'short' => 'f',
            'min' => 0,
            'max' => 0,
        ),
       /* removed - use GenerateNotifcations.php hooked classes
         'generate' =>  'Generate notifications for a table, eg. cash_invoice',
            
        ),
        */
         'limit' => array(
            'desc' => 'Limit search for no. to send to ',
            'default' => 1000,
            'short' => 'L',
            'min' => 0,
            'max' => 999,
        ),
        'dryrun' => array(
            'desc' => 'Dry run - do not send.',
            'default' => 0,
            'short' => 'D',
            'min' => 0,
            'max' => 0,
        ),
        'poolsize' => array(
            'desc' => 'Pool size',
            'default' => 10,
            'short' => 'P',
            'min' => 0,
            'max' => 100,
        ),
    );
    /**
     * @var $nice_level Unix 'nice' level to stop it jamming server up.
     */
    var $nice_level = false;
    /**
     * @var $max_pool_size maximum runners to start at once.
     */
    var $max_pool_size = 10;
    /**
     * @var $max_to_domain maximum connections to make to a single domain
     */
    var $max_to_domain = 10;
    
    /**
     * @var $maxruntime - maximum time a child is allowed to run - defaut 2 minutes
     */
    var $maxruntime = 120;
    
    var $table = 'core_notify';
    var $target = 'Core/NotifySend';
    var $evtype = ''; // any notification...
                    // this script should only handle EMAIL notifications..
    var $force = false;
    function getAuth()
    {
        $ff = HTML_FlexyFramework::get();
        if (!$ff->cli) {
            die("access denied");
        }
        HTML_FlexyFramework::ensureSingle($_SERVER["SCRIPT_NAME"] .'|'. __FILE__, $this);
        return true;
    }
    
    var $pool = array();
    
    function parseArgs(&$opts)
    {
        if ($opts['debug']) {
            DB_DataObject::debugLevel($opts['debug']);
            print_r($opts);
        }
        $this->opts = $opts;
        if (!empty($opts['poolsize'])) {
            $this->max_pool_size = $opts['poolsize'];
        }
        
        if (empty($opts['limit'])) {
            $opts['limit'] = '1000'; // not sure why it's not picking up the defautl..
        }
        
        if (!empty($opts['old'])) {
            $opts['list'] = 1; // force listing..
        }
        
        $this->force = empty($opts['force']) ? 0 : 1;
     
        if (!empty($opts['send-to'])) {
            $this->send_to = $opts['send-to'];
        }
    }
    
    
    function get($r,$opts=array())    
    {
        $this->parseArgs($opts); 
         
        //date_default_timezone_set('UTC');
        
        
        $this->generateNotifications();
        
         
        //DB_DataObject::debugLevel(1);
        $w = DB_DataObject::factory($this->table);
        $total = 0;
        
        if (!empty($opts['old'])) {
            // show old and new...
            
            $w->orderBy('act_when DESC'); // latest first
            $w->limit($opts['limit']); // we can run 
            $total = min($w->count(), $opts['limit']);
        } else {   
            // standard
            
            //$w->whereAdd('act_when > sent'); // eg.. sent is not valid..
            $w->whereAdd("sent < '1970-01-01' OR sent IS NULL"); // eg.. sent is not valid..
            
            $w->whereAdd('act_start > NOW() - INTERVAL 14 DAY'); // ignore the ones stuck in the queue
            if (!$this->force) {
                $w->whereAdd('act_when < NOW()'); // eg.. not if future..
            }
    
            $w->orderBy('act_when ASC'); // oldest first.
            $total = min($w->count(), $opts['limit']);
            $this->logecho("QUEUE is {$w->count()} only running " . ((int) $opts['limit']));
            
            $w->limit($opts['limit']); // we can run 1000 ...
        }
        
        if (!empty($this->evtype)) {
            $w->evtype = $this->evtype;
        }
        
        $w->autoJoin();
        $w->find();
        
        $ar = array(); // $w->fetchAll();
        
        if (!empty($opts['list'])) {
            
            
            while ($w->fetch()) { 
                $o = $w->object();
                
                
                $this->logecho("{$w->id} : {$w->person()->email} email    : ".
                        $o->toEventString()."    ". $w->status()  );
            }
            exit;
        }
        
        //echo "BATCH SIZE: ".  count($ar) . "\n";
        $pushed = array();
        $requeue = array();
        while (true) {
            if ($w->fetch()) {
                $ar[] = clone($w);
                $total--;
            }
            
            $this->logecho("BATCH SIZE: ".  (count($ar) + $total) );
            
            if (empty($ar)) {
                $this->logecho("COMPLETED MAIN QUEUE - running deleted");
                
                if (empty($pushed)) {
                    break;
                }
                $ar = $pushed;
                $pushed = false;
                continue;
            }
            
            
            $p = array_shift($ar);
            if (!$this->poolfree()) {
                array_unshift($ar,$p); /// put it back on..
                sleep(3);
                continue;
            }
            $email = $p->person() ? $p->person()->email : $p->to_email;
            
            if ($this->poolHasDomain($email) > $this->max_to_domain) {
                
                if ($pushed === false) {
                    // we only try once to requeue..
                    $requeue[] = $p;
                    continue;
                }
                $pushed[] = $p;
                
                
                //sleep(3);
                continue;
            }
            
            
            $this->run($p->id,$email);
            
            
        }
        
        // we should have a time limit here...
        while(count($this->pool)) {
            $this->poolfree();
             sleep(3);
        }
         
        foreach($requeue as $p) {
            $pp = clone($p);
            $p->act_when = $p->sqlValue('NOW + INTERVAL 1 MINUTE');
            $p->update($pp);
            
        }
        
        
        $this->logecho("DONE");
        exit;
    }
    
    function generateNotifications()
    {
        // this should check each module for 'GenerateNotifications.php' class..
        //and run it if found..
        $ff = HTML_FlexyFramework::get();
       
        $disabled = explode(',', $ff->disable);

        $modules = array_reverse($this->modulesList());
        
        // move 'project' one to the end...
        
        foreach ($modules as $module){
            if(in_array($module, $disabled)){
                continue;
            }
            $file = $this->rootDir. "/Pman/$module/GenerateNotifications.php";
            if(!file_exists($file)){
                continue;
            }
            
            require_once $file;
            $class = "Pman_{$module}_GenerateNotifications";
            $x = new $class;
            if(!method_exists($x, 'generate')){
                continue;
            };
            //echo "$module\n";
            $x->generate($this);
        }
                
    
    }
    
    
    function run($id, $email, $cmdOpts="")
    {
        
        static $renice = false;
        if (!$renice) {
            require_once 'System.php';
            $renice = System::which('renice');
        }
        
        // phpinfo();exit;
        $tnx = tempnam(ini_get('session.save_path'),'stdout');
        unlink($tnx);
        $tn =  $tnx . '.stdout';
        $descriptorspec = array(
            0 => array("pipe", 'r'),  // stdin is a pipe that the child will read from
            1 => array("file", $tn, 'w'),  // stdout is a pipe that the child will write to
            2 => array("pipe", "w") // stderr is a file to write to
         );
        
        static $php = false;
        if (!$php) {
            require_once 'System.php';
            $php = System::which('php');
        }
        
        $sn =  $_SERVER["SCRIPT_NAME"];
        
        $cwd = $sn[0] == '/' ? dirname($sn) : dirname(realpath(getcwd() . '/'. $sn)); // same as run on.. (so script should end up being same relatively..)
        $app = $cwd . '/' . basename($_SERVER["SCRIPT_NAME"]) . '  ' . $this->target . '/'. $id;
        if ($this->force) {
            $app .= ' -f';
        }
        if (!empty($this->send_to)) {
            $app .= ' --sent-to='.escapeshellarg($this->send_to);
        }
        $cmd = 'exec ' . $php . ' ' . $app . ' ' . $cmdOpts; //. ' &';
        
       
        $pipe = array();
        $this->logecho("call proc_open $cmd");
        
        
        if ($this->max_pool_size === 1) {
            passthru($cmd);
            return;
        }
        
        
        if (!empty($this->opts['dryrun'])) {
            $this->logecho("DRY RUN");
            return;
        }
        
        $p = proc_open($cmd, $descriptorspec, $pipes, $cwd );
        $info =  proc_get_status($p);
        
        if ($this->nice_level !== false) { 
            $rcmd = "$renice {$this->nice_level} {$info['pid']}";
            `$rcmd`;
        } 
        $this->pool[] = array(
                'proc' => $p,
                'pid' => $info['pid'],
                'out' => $tn,
                'cmd' => $cmd,
                'email' => $email,
                'pipes' => $pipes,
                'notify_id' => $id,
                'started' => time()
            
                
        );
        $this->logecho("RUN ({$info['pid']}) $cmd ");
    }
    
    function poolfree()
    {
        $pool = array();
        clearstatcache();
         
        foreach($this->pool as $p) {
             
            //echo "CHECK PID: " . $p['pid'] . "\n";
            $info =  proc_get_status($p['proc']);
            //var_dump($info);
            
            // update if necessday.
            if ($info['pid'] && $p['pid'] != $info['pid']) {
                $this->logecho("CHANING PID FROM " . $p['pid']  .  "  TO ". $info['pid']);
                $p['pid'] = $info['pid'];
            }
            
            //echo @file_get_contents('/proc/'. $p['pid'] .'/cmdline') . "\n";
            
            if ($info['running']) {
            
                //if (file_exists('/proc/'.$p['pid'])) {
                $runtime = time() - $p['started'];
                //echo "RUNTIME ({$p['pid']}): $runtime\n";
                if ($runtime > $this->maxruntime) {
                    
                    proc_terminate($p['proc'], 9);
                    //fclose($p['pipes'][1]);
                    fclose($p['pipes'][0]);
                    fclose($p['pipes'][2]);
                    $this->logecho("TERMINATING: ({$p['pid']}) " . $p['cmd'] . " : " . file_get_contents($p['out']));
                    @unlink($p['out']);
                    
                    $w = DB_DataObject::factory($this->table);
                    $w->get($p['notify_id']);
                    $ww = clone($w);
                    $this->addEvent('NOTIFY', $w, 'TERMINATED - TIMEOUT');
                    $w->act_when = date('Y-m-d H:i:s', strtotime('NOW + 30  MINUTES'));
                    $w->update($ww);
                    
                    
                    continue;
                }
                
                $pool[] = $p;
                continue;
            }
            fclose($p['pipes'][0]);
            fclose($p['pipes'][2]);
            //echo "CLOSING: ({$p['pid']}) " . $p['cmd'] . " : " . file_get_contents($p['out']) . "\n";
            //fclose($p['pipes'][1]);
            
            proc_close($p['proc']);
            
            
            //clearstatcache();
            //if (file_exists('/proc/'.$p['pid'])) {
            //    $pool[] = $p;
            //    continue;
            //}
            $this->logecho("ENDED: ({$p['pid']}) " .  $p['cmd'] . " : " . file_get_contents($p['out']) );
            @unlink($p['out']);
            //unlink($p['out']);
        }
        $this->logecho("POOL SIZE: ". count($pool) );
        $this->pool = $pool;
        if (count($pool) < $this->max_pool_size) {
            return true;
        }
        return false;
        
    }
    /**
     * see if pool is already trying to deliver to this domain.?
     * -- if so it get's pushed to the end of the queue.
     *
     */
    function poolHasDomain($email)
    {
        $ret = 0;
        $dom = strtolower(array_pop(explode('@',$email)));
        foreach($this->pool as $p) {
            $mdom = strtolower(array_pop(explode('@',$p['email'])));
            if ($mdom == $dom) {
                $ret++;
            }
        }
        return $ret;
        
    }

    function output()
    {
        $this->logecho("DONE");
        exit;
    }
    function logecho($str)
    {
        echo date("Y-m-d H:i:s - ") . $str . "\n";
    }
}