Asterisk voicemail integration with out google Speech Recognition

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I don’t have a credit card and unable to use the Speech Recognition of google.
So I am unable to use the Standard Asterisk voicemail integration.

I made my own.
It detects voicemail messages and creates a mp3 playlist with all the recordings. I tried to make it one mp3 but that failed. But Google assistant can only play the 1st recording in the playlist. So I use my speaker system.

it uses gtts to make announcements of the voicemail and i have made a script to detect callers names using khard.

run it as a crontab on the asterisk server. and make a mediaplayer play the m3u file as playlist.

#!/usr/bin/php
<?php

$http_path = "/var/www/html/asterisk/";
$http_url = "http://192.168.5.14/asterisk/";
$spool_path = "/var/spool/asterisk/voicemail/default/1000/INBOX/";
$voicemail_count_file ="/opt/voicemail_assistant/count_file.txt";

function khard($number) {
  $command = "";
  $name=$number;

  #make the number general
  if (preg_match('/\+\d+/', $number)) {
     $number = substr($number, 3);

  } else {
     $number = substr($number, 1);
  }
  $handle = popen('export LC_ALL=en_US.UTF-8 && khard -c /opt/khard/config/khard.conf  '. $number. ' 2>/dev/null', 'r');
  while($read = fread($handle, 2096)) {
    $command = $command . $read;
  }
  pclose($handle);

  $pattern = "/\d+\s{2,}([A-Za-z0-9].*)\s{2}\s.cell/";
  if(preg_match_all($pattern, $command, $matches)) {
    $name = $matches[1][0];
  }

  return $name;
}

$nFound = 0;
if ($handle = opendir($spool_path)) {
    echo "Directory handle: $handle\n";
    echo "Entries:\n";

    /* This is the correct way to loop over the directory. */
    while (false !== ($entry = readdir($handle))) {
#        echo "$entry\n";
       $pattern = "/msg(\d{4})\.wav/";
       if(preg_match_all($pattern, $entry, $matches)) {
           $voicemails[] = $matches[1][0];
           $nFound++;
          #print_r($matches);
       }

    }

    closedir($handle);
}

$last_count = file_get_contents($voicemail_count_file);

if ($last_count ==  $nFound ) {
  echo "no change found";
  exit(0);
}
if ($nFound > 0) {
    asort($voicemails);
    #print_r($voicemails);
   $voicemailCount = 0;
   $mp3Count = 0;
   unlink($http_path."/playlist.m3u");
   foreach ($voicemails as $voicemail) {
    $voicemailCount++;
    $mp3Count++;
    echo "$voicemail\n";
    $info = parse_ini_file($spool_path.'/msg'.$voicemail.'.txt');
    print_r($info);
    $name =  khard($info['callerid']);
    system("/usr/local/bin/gtts-cli -l nl 'voicemail $voicemailCount van $name' >  ".$http_path."/part".$mp3Count.".mp3");
    file_put_contents($http_path."/playlist.m3u", $http_url."/part".$mp3Count.".mp3\n", FILE_APPEND | LOCK_EX);
    $mp3Count++;
    system("ffmpeg -i ".$spool_path."/msg".$voicemail.".wav -ab 32k  -filter:a \"volume=3.5\"  ".$http_path."/part".$mp3Count.".mp3");
    file_put_contents($http_path."/playlist.m3u",$http_url."/part".$mp3Count.".mp3\n", FILE_APPEND | LOCK_EX);
   }
} else {
    foreach (new DirectoryIterator($http_path) as $fileInfo) {
      if(!$fileInfo->isDot()) {
          unlink($fileInfo->getPathname());
       }
    }
    system("/usr/local/bin/gtts-cli -l nl 'U heeft geen berichten' >  ".$http_path."/part1.mp3");
    file_put_contents($http_path."/playlist.m3u", $http_url."/part1.mp3\n",  LOCK_EX);
}

echo "## $nFound ##";
file_put_contents($voicemail_count_file,$nFound);

#!/usr/bin/php
<?php
$command = "";
$addressbook ="none";
$number = $argv[1];
$name=$number;
$bFound = false;
#echo strpos($number,"+");

#make the number general
if (preg_match('/\+\d+/', $number)) {
   $number = substr($number, 3);

} else {
   $number = substr($number, 1);
}
/* Add redirection so we can get stderr. */
$handle = popen('export LC_ALL=en_US.UTF-8 && khard -c /opt/khard/config/khard.conf  '. $number. ' 2>/dev/null', 'r');
#echo "'$handle'; " . gettype($handle) . "\n";
while($read = fread($handle, 2096)) {
  $command = $command . $read;
}
pclose($handle);

$pattern = "/Address book: (.*)/";
if(preg_match_all($pattern, $command, $matches)) {
  $addressbook = $matches[1][0];
  $bFound = true;
}
#echo $addressbook;
file_put_contents("/opt/khard/addressbook", $addressbook);

$pattern = "/\d+\s{2,}([A-Za-z0-9].*)\s{2}\s.cell/";
if(preg_match_all($pattern, $command, $matches)) {
  $name = $matches[1][0];
#print_r($matches);
}
file_put_contents("/opt/khard/name", $name);

if ($bFound) {
  file_put_contents("/opt/khard/name_and_number", $name . " " . $argv[1]);

} else {
  file_put_contents("/opt/khard/name_and_number", $name);
}


?>