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<?php
namespace WeDevs\ERP;
use Exception;
/**
* Incoming email reader class
*
* Instructions
* =========================================================
* sudo apt-get install php5-imap
* sudo php5enmod imap
* sudo service apache2 restart
*
* Host: {imap.gmail.com:993/imap/ssl}INBOX
* Host: {imap.gmail.com:993/imap/ssl/novalidate-cert}INBOX
* Host: {imap.mail.yahoo.com:993/imap/ssl}INBOX
* Host: {imap-mail.outlook.com:993/imap/ssl}INBOX
* https://www.google.com/settings/security/lesssecureapps
* =========================================================
*/
class Imap {
/**
* Mailbox
*/
protected $mailbox;
/**
* Imap connection
*/
protected $connection;
/**
* Class contsructor
*
* @param string $host
* @param string $port (993|995)
* @param string $protocol
* @param string $username
* @param string $password
* @param string $authentication (ssl|tls|notls)
* @param bool $cert
*
* @return void
*/
public function __construct( $host, $port, $protocol, $username, $password, $authentication = 'ssl', $cert = false ) {
set_time_limit( 3000 );
$this->host = $host;
$option = '';
if ( $protocol ) {
$option .= '/' . $protocol;
}
$option .= '/' . $authentication;
if ( $cert ) {
$option .= '/validate-cert';
} else {
$option .= '/novalidate-cert';
}
if ( preg_match( '/google|gmail/i', $host ) ) {
$this->mailbox = '{' . $host . ':' . $port . $option . '}INBOX';
} else {
$this->mailbox = '{' . $host . ':' . $port . $option . '}';
}
if ( ! $this->is_extension_loaded() ) {
throw new Exception( 'Your server isn\'t connected with imap.' );
}
$this->connection = imap_open( $this->mailbox, $username, $password );
if ( ! $this->connection ) {
throw new Exception( 'Cannot connect to Email: ' . imap_last_error() );
}
}
/**
* Determine the imap entension is loaded or try to load it dynamically
*
* @return bool
*/
public function is_extension_loaded() {
if ( ! extension_loaded( 'imap' ) || ! function_exists( 'imap_open' ) ) {
// $prefix = ( PHP_SHLIB_SUFFIX == 'dll' ) ? 'php_' : '';
// $extension = $prefix . 'imap.' . PHP_SHLIB_SUFFIX;
// if ( function_exists( 'dl' ) ) {
// return dl( $extension );
// }
return false;
}
return true;
}
/**
* Determine if the imap stream is connected
*
* @return bool
*/
public function is_connected() {
if ( imap_ping( $this->connection ) ) {
return true;
}
return false;
}
/**
* Open the inbox
*
* @param string $mailbox (optional)
* @param string $query (optional)
*
* @return array
*/
public function open( $mailbox = 'inbox', $query = 'UNSEEN' ) {
if ( strtolower( $mailbox ) != 'inbox' ) {
$mailboxes = imap_list( $this->connection, $this->mailbox, $mailbox );
imap_reopen( $this->connection, $mailboxes[0] );
}
$emails = imap_search( $this->connection, $query );
if ( $emails ) {
rsort( $emails );
return $emails;
}
return [];
}
/**
* Get all emails with body & attachments
*
* @param string $mailbox (optional)
* @param string $query (optional)
*
* @return array
*/
public function get_emails( $mailbox = 'inbox', $query = 'UNSEEN' ) {
$email_ids = $this->open( $mailbox, $query );
$emails = [];
foreach ( $email_ids as $email_id ) {
$emails[] = [
'id' => $email_id,
'subject' => $this->get_subject( $email_id ),
'body' => $this->get_body( $email_id ),
'attachments' => $this->get_attachments( $email_id ),
'headers' => $this->get_headers( $email_id ),
];
}
return $emails;
}
/**
* Get email overview
*
* @param int $email_id
*
* @return array
*/
public function get_overview( $email_id ) {
$overview = imap_fetch_overview( $this->connection, $email_id, 0 );
return $overview;
}
/**
* Get email headers
*
* @param int $email_id
*
* @return array
*/
public function get_headers( $email_id ) {
$header_string = imap_fetchheader( $this->connection, $email_id );
preg_match_all( '/([^: ]+): (.+?(?:\r\n\s(?:.+?))*)\r\n/m', $header_string, $matches );
$headers = array_combine( $matches[1], $matches[2] );
return $headers;
}
/**
* Get email subject
*
* @param int $email_id
*
* @return string
*/
public function get_subject( $email_id ) {
$headers = $this->get_headers( $email_id );
return $headers['Subject'];
}
/**
* Get email body
*
* @param int $email_id
*
* @return text
*/
public function get_body( $email_id ) {
$body = $this->get_part( $email_id, 'TEXT/HTML' );
// if HTML body is empty, try getting text body
if ( $body == '' ) {
$body = $this->get_part( $email_id, 'TEXT/PLAIN' );
}
return $body;
}
/**
* Get email part for decoding email body
*
* @param int $email_id
* @param int $mimetype
* @param int $structure
* @param int $part_number
*
* @return string
*/
protected function get_part( $email_id, $mimetype, $structure = false, $part_number = false ) {
if ( ! $structure ) {
$structure = imap_fetchstructure( $this->connection, $email_id );
}
if ( $structure ) {
if ( $mimetype == $this->get_mime_type( $structure ) ) {
if ( ! $part_number ) {
$part_number = 1;
}
$text = imap_fetchbody( $this->connection, $email_id, $part_number, FT_PEEK );
switch ( $structure->encoding ) {
case 3: return imap_base64( $text );
case 4: return imap_qprint( $text );
default: return $text;
}
}
// multipart
if ( $structure->type == 1 ) {
foreach ( $structure->parts as $index => $sub_struct ) {
$prefix = '';
if ( $part_number ) {
$prefix = $part_number . '.';
}
$data = $this->get_part( $email_id, $mimetype, $sub_struct, $prefix . ( $index + 1 ) );
if ( $data ) {
return $data;
}
}
}
}
return '';
}
/**
* Get mimetype by given email structure
*
* @param array $structure
*
* @return string
*/
protected function get_mime_type( $structure ) {
$primary_mimetypes = [ 'TEXT', 'MULTIPART', 'MESSAGE', 'APPLICATION', 'AUDIO', 'IMAGE', 'VIDEO', 'OTHER' ];
if ( $structure->subtype ) {
return $primary_mimetypes[(int) $structure->type] . '/' . $structure->subtype;
}
return 'TEXT/PLAIN';
}
/**
* Get email attachments
*
* @param int $email_id
*
* @return array
*/
public function get_attachments( $email_id ) {
$structure = imap_fetchstructure( $this->connection, $email_id );
$attachments = [];
/* if any attachment found... */
if ( isset( $structure->parts ) && count( $structure->parts ) ) {
for ( $i = 0; $i < count( $structure->parts ); $i++ ) {
$attachments[$i] = [
'is_attachment' => false,
'filename' => '',
'attachment' => '',
];
if ( $structure->parts[$i]->ifdparameters ) {
foreach ( $structure->parts[$i]->dparameters as $object ) {
if ( strtolower( $object->attribute ) == 'filename' ) {
$attachments[$i]['is_attachment'] = true;
$attachments[$i]['filename'] = $object->value;
}
}
}
if ( $structure->parts[$i]->ifparameters ) {
foreach ( $structure->parts[$i]->parameters as $object ) {
if ( strtolower( $object->attribute ) == 'name' ) {
$attachments[$i]['is_attachment'] = true;
$attachments[$i]['filename'] = $object->value;
}
}
}
if ( $attachments[$i]['is_attachment'] ) {
$attachments[$i]['attachment'] = imap_fetchbody( $this->connection, $email_id, $i + 1 );
if ( $structure->parts[$i]->encoding == 3 ) {
$attachments[$i]['attachment'] = base64_decode( $attachments[$i]['attachment'] );
} elseif ( $structure->parts[$i]->encoding == 4 ) {
$attachments[$i]['attachment'] = quoted_printable_decode( $attachments[$i]['attachment'] );
}
}
}
}
$filtered_attachments = [];
foreach ( $attachments as $attachment ) {
if ( $attachment['is_attachment'] ) {
$filtered_attachments[] = $attachment;
}
}
return $filtered_attachments;
}
/**
* Mark emails as seen
*
* @param array $email_ids
*
* @return bool
*/
public function mark_seen_emails( $email_ids ) {
$comma_separated_ids = implode( ',', $email_ids );
if ( empty( $comma_separated_ids ) ) {
return false;
}
$status = imap_setflag_full( $this->connection, $comma_separated_ids, '\\Seen' );
return $status;
}
/**
* Download email attachments as zip
*
* @param array $attachments
*
* @return void
*/
public function download_attachments( $attachments ) {
$zip_file = 'email-attachment.zip';
$zip = new ZipArchive();
$zip->open( $zip_file, ZipArchive::CREATE | ZipArchive::OVERWRITE );
foreach ( $attachments as $file ) {
$zip->addFromString( $file['filename'], $file['attachment'] );
}
$zip->close();
header( 'Content-Description: File Transfer' );
header( 'Content-Type: application/octet-stream' );
header( 'Content-Disposition: attachment; filename=email-attachment.zip' );
header( 'Content-Transfer-Encoding: binary' );
header( 'Expires: 0' );
header( 'Cache-Control: must-revalidate' );
header( 'Pragma: public' );
readfile( $zip_file );
exit;
}
/**
* Close the connection
*
* @return void
*/
public function close() {
imap_close( $this->connection );
}
}