/**
* Poll all eligible labs for new results and store them in the database.
*
* @param array &$info Conveys information to and from the caller:
* FROM THE CALLER:
* $info["$ppid/$filename"]['delete'] = a non-empty value if file deletion is requested.
* $info['select'] = array of patient matching responses where key is serialized patient
* attributes and value is selected pid for this patient, or 0 to create the patient.
* TO THE CALLER:
* $info["$ppid/$filename"]['mssgs'] = array of messages from this function.
* $info['match'] = array of patient matching requests where key is serialized patient
* attributes (ss, fname, lname, DOB) and value is TRUE (irrelevant).
*
* @return string Error text, or empty if no errors.
*/
function poll_hl7_results(&$info)
{
global $srcdir;
// echo "<!-- post: "; print_r($_POST); echo " -->\n"; // debugging
// echo "<!-- in: "; print_r($info); echo " -->\n"; // debugging
$filecount = 0;
$badcount = 0;
if (!isset($info['match'])) {
$info['match'] = array();
}
// match requests
if (!isset($info['select'])) {
$info['select'] = array();
}
// match request responses
$ppres = sqlStatement("SELECT * FROM procedure_providers ORDER BY name");
while ($pprow = sqlFetchArray($ppres)) {
$ppid = $pprow['ppid'];
$protocol = $pprow['protocol'];
$remote_host = $pprow['remote_host'];
$hl7 = '';
if ($protocol == 'SFTP') {
$remote_port = 22;
// Hostname may have ":port" appended to specify a nonstandard port number.
if ($i = strrpos($remote_host, ':')) {
$remote_port = 0 + substr($remote_host, $i + 1);
$remote_host = substr($remote_host, 0, $i);
}
// Compute the target path name.
$pathname = '.';
if ($pprow['results_path']) {
$pathname = $pprow['results_path'] . '/' . $pathname;
}
// Connect to the server and enumerate files to process.
$sftp = new \phpseclib\Net\SFTP($remote_host, $remote_port);
if (!$sftp->login($pprow['login'], $pprow['password'])) {
return xl('Login to remote host') . " '{$remote_host}' " . xl('failed');
}
$files = $sftp->nlist($pathname);
foreach ($files as $file) {
if (substr($file, 0, 1) == '.') {
continue;
}
++$filecount;
if (!isset($info["{$ppid}/{$file}"])) {
$info["{$ppid}/{$file}"] = array();
}
// Ensure that archive directory exists.
$prpath = $GLOBALS['OE_SITE_DIR'] . "/procedure_results";
if (!file_exists($prpath)) {
mkdir($prpath);
}
$prpath .= '/' . $pprow['ppid'];
if (!file_exists($prpath)) {
mkdir($prpath);
}
// Get file contents.
$hl7 = $sftp->get("{$pathname}/{$file}");
// If user requested reject and delete, do that.
if (!empty($info["{$ppid}/{$file}"]['delete'])) {
$fh = fopen("{$prpath}/{$file}.rejected", 'w');
if ($fh) {
fwrite($fh, $hl7);
fclose($fh);
} else {
return xl('Cannot create file') . ' "' . "{$prpath}/{$file}.rejected" . '"';
}
if (!$sftp->delete("{$pathname}/{$file}")) {
return xl('Cannot delete (from SFTP server) file') . ' "' . "{$pathname}/{$file}" . '"';
}
continue;
}
// Do a dry run of its contents and check for errors and match requests.
$tmp = receive_hl7_results($hl7, $info['match'], $ppid, $pprow['direction'], true, $info['select']);
$info["{$ppid}/{$file}"]['mssgs'] = $tmp['mssgs'];
// $info["$ppid/$file"]['match'] = $tmp['match'];
if (!empty($tmp['fatal']) || !empty($tmp['needmatch'])) {
// There are errors or matching requests so skip this file.
continue;
}
// Now the money shot - not a dry run.
$tmp = receive_hl7_results($hl7, $info['match'], $ppid, $pprow['direction'], false, $info['select']);
$info["{$ppid}/{$file}"]['mssgs'] = $tmp['mssgs'];
// $info["$ppid/$file"]['match'] = $tmp['match'];
if (empty($tmp['fatal']) && empty($tmp['needmatch'])) {
// It worked, archive and delete the file.
$fh = fopen("{$prpath}/{$file}", 'w');
if ($fh) {
fwrite($fh, $hl7);
fclose($fh);
} else {
return xl('Cannot create file') . ' "' . "{$prpath}/{$file}" . '"';
}
if (!$sftp->delete("{$pathname}/{$file}")) {
return xl('Cannot delete (from SFTP server) file') . ' "' . "{$pathname}/{$file}" . '"';
}
}
}
// end of this file
} else {
if ($protocol == 'FS') {
// Filesystem directory containing results files.
$pathname = $pprow['results_path'];
if (!($dh = opendir($pathname))) {
return xl('Unable to access directory') . " '{$pathname}'";
}
// Sort by filename just because.
$files = array();
while (false !== ($file = readdir($dh))) {
if (substr($file, 0, 1) == '.') {
continue;
}
$files[$file] = $file;
}
closedir($dh);
ksort($files);
// For each file...
foreach ($files as $file) {
++$filecount;
if (!isset($info["{$ppid}/{$file}"])) {
$info["{$ppid}/{$file}"] = array();
}
// Ensure that archive directory exists.
$prpath = $GLOBALS['OE_SITE_DIR'] . "/procedure_results";
if (!file_exists($prpath)) {
mkdir($prpath);
}
$prpath .= '/' . $pprow['ppid'];
if (!file_exists($prpath)) {
mkdir($prpath);
}
// Get file contents.
$hl7 = file_get_contents("{$pathname}/{$file}");
// If user requested reject and delete, do that.
if (!empty($info["{$ppid}/{$file}"]['delete'])) {
$fh = fopen("{$prpath}/{$file}.rejected", 'w');
if ($fh) {
fwrite($fh, $hl7);
fclose($fh);
} else {
return xl('Cannot create file') . ' "' . "{$prpath}/{$file}.rejected" . '"';
}
if (!unlink("{$pathname}/{$file}")) {
return xl('Cannot delete file') . ' "' . "{$pathname}/{$file}" . '"';
}
continue;
}
// Do a dry run of its contents and check for errors and match requests.
$tmp = receive_hl7_results($hl7, $info['match'], $ppid, $pprow['direction'], true, $info['select']);
$info["{$ppid}/{$file}"]['mssgs'] = $tmp['mssgs'];
// $info["$ppid/$file"]['match'] = $tmp['match'];
if (!empty($tmp['fatal']) || !empty($tmp['needmatch'])) {
// There are errors or matching requests so skip this file.
continue;
}
// Now the money shot - not a dry run.
$tmp = receive_hl7_results($hl7, $info['match'], $ppid, $pprow['direction'], false, $info['select']);
$info["{$ppid}/{$file}"]['mssgs'] = $tmp['mssgs'];
// $info["$ppid/$file"]['match'] = $tmp['match'];
if (empty($tmp['fatal']) && empty($tmp['needmatch'])) {
// It worked, archive and delete the file.
$fh = fopen("{$prpath}/{$file}", 'w');
if ($fh) {
fwrite($fh, $hl7);
fclose($fh);
} else {
return xl('Cannot create file') . ' "' . "{$prpath}/{$file}" . '"';
}
if (!unlink("{$pathname}/{$file}")) {
return xl('Cannot delete file') . ' "' . "{$pathname}/{$file}" . '"';
}
}
}
// end of this file
}
}
// end FS protocol
// TBD: Insert "else if ($protocol == '???') {...}" to support other protocols.
}
// end procedure provider
// echo "<!-- out: "; print_r($info); echo " -->\n"; // debugging
return '';
}
