<?php
/**
 * expireOneSession.php
 *
 * this script is invoked by atd (8) and it's sole purpose is to take the GUID passed-in the program as a cli param,
 * fetch the session record indicated by the GUID, expire the session, then update the corresponding system event
 * record to evolve the status of that record to expired.
 *
 * Previous versions of this program had extensive error checking and some unnecessary instantiations - all this code
 * really needs to do is take the session GUID passed-in and build an update query for the tercero::sessions table that
 * will expire the session record and pass that to the tercero broker before locally updating the system event record.
 *
 * If any processing prevents the script from issuing and successfully processing the expire command, then we'll create
 * and entry in the failed-sessions table so that we can make a second attempt, later, to clean-up the "orphaned"
 * sessions.
 *
 * This script can only run on the Admin service.
 *
 * NOTE:
 * -----
 * This is an example of the CLI directive registered with AT(1):
 *
 * /usr/bin/php -f /home/mshallop/code/php/namaste/scripts/expireOneSession.php DD0ABEE5-77F3-74F1-DF0E-581D72C3A8C9
 *
 * The token value parameter corresponds to gaSystemEvents_sev.idses_sev and to gaSessions_ses.token_ses -- meaning
 * there's no longer any need to go through the system event to fetch the token.
 *
 * @author  mike@givingassistant.org
 * @version 1.0
 *
 *
 * HISTORY:
 * ========
 * 09-30-20     mks     DB-168: original coding
 *
 */
@require_once(dirname(__DIR__) . '/config/sneakerstrap.inc');
$res = '_X1S: ';        // expire-one-session-script
$errors = [];
$sessionGUID = null;
$sessionData = null;
$sysEvData = null;
/** @var gacMongoDB $feWidget */
$feWidget = null;
$file = basename(__FILE__);
$ext = COLLECTION_MONGO_SESS_EXT;

$logger = new gacErrorLogger();

if (!gasConfig::$settings[ENV_ADMIN][CONFIG_IS_LOCAL]) {
    exit(ERROR_REMOTE_NOT_ADMIN);
}

function logout(string $_msg):void
{
    global $logger, $res;
    consoleLog($res, CON_SYSTEM, $_msg);
    $logger->error($_msg);
    exit($_msg);
}

// set-up the meta data arrays
$metaFailedSessions = [
    META_SESSION_MISC => $file,
    META_SESSION_IP => STRING_SESSION_HOME,
    META_CLIENT => CLIENT_SYSTEM,
    META_SESSION_DAEMON => 1,
    META_TEMPLATE => TEMPLATE_CLASS_FAILED_SESSIONS
];
$metaSession = [
    META_SESSION_MISC => $file,
    META_SESSION_IP => STRING_SESSION_HOME,
    META_CLIENT => CLIENT_SYSTEM,
    META_SESSION_DAEMON => 1,
    META_TEMPLATE => TEMPLATE_CLASS_SESSIONS
];
$metaSysEv = [
    META_SESSION_MISC => $file,
    META_SESSION_IP => STRING_SESSION_HOME,
    META_CLIENT => CLIENT_SYSTEM,
    META_TEMPLATE => TEMPLATE_CLASS_SYS_EVENTS
];

// validate the session record GUID passed as a CLI parameter to the program
if (!empty($argv) and !empty($argv[1])) {
    $sessionGUID = $argv[1];
    if (!validateGUID($sessionGUID)) {
        // if the eventGUID fails validation, then create a systemEvent and exit
        consoleLog($res, CON_ERROR, ERROR_INVALID_GUID . $sessionGUID);
        $eventData = [
            MONGO_FAILED_EVENT_GUID => $sessionGUID,
            DB_CREATED => new MongoDate(),
            MONGO_FAILED_EVENT_NAME => MONGO_FAILED_EVENT_BAD_GUID,
            MONGO_FAILED_EVENT_DESC => sprintf(MONGO_FAILED_EVENT_BAD_GUID_DESC, $sessionGUID),
            MONGO_FAILED_EVENT_SEV => MONGO_FAILED_EVENT_SEV_LOW
        ];
        /** @var gacMongoDB $feWidget */
        if (!is_null($feWidget = grabWidget($meta, '', $errors))) {
            $feWidget->_createRecord([$eventData]);
            if (!$feWidget->status) {
                // saving the failed-session record failed
                $hdr = sprintf(INFO_LOC, $file, __LINE__);
                $msg = sprintf(ERROR_MDB_QUERY_FAIL, DB_EVENT_CREATE);
                logout($hdr . $msg);
            }
        } else {
            // todo -- post a new system event for the inability to create a failed session record
            $data = [
                SYSTEM_EVENT_NAME => SYSEV_NAME_FAIL_TO_INIT . TEMPLATE_CLASS_SESSIONS,
                SYSTEM_EVENT_TYPE => SYSEV_TYPE_CLASS,
                SYSTEM_EVENT_CODE_LOC => $file . AT . __LINE__,
                SYSTEM_EVENT_META_DATA => $metaSysEv,
            ];
            @postSystemEvent($data, $sessionGUID, $logger);
            logout(ERROR_FAILED_TO_INSTANTIATE . TEMPLATE_CLASS_SESSIONS);
        }
    }
} else {
    $hdr = sprintf(INFO_LOC, $file, __LINE__);
    logout($hdr . ERROR_DATA_ARRAY_ARGV_EMPTY);
}

// next step: build the data payload for the tercero broker(sBroker) event to expire a session
$request = [
    BROKER_REQUEST => BROKER_REQUEST_EXPIRE_SESSION,
    BROKER_DATA => [
        STRING_GUID_KEY => $sessionGUID,
        STRING_TOK_TYPE => STRING_TOK_TYPE_SES,
        SESSION_CUSTOM_FIELD => INFO_CLOSED_BY,
        SESSION_CUSTOM_VALUE => INFO_CLOSED_BY_EOS
    ],
    BROKER_META_DATA => [
        META_TEMPLATE => TEMPLATE_CLASS_SESSIONS,
        META_CLIENT => CLIENT_SYSTEM,
        META_SESSION_DAEMON => 1,
        META_SESSION_MISC => basename(__FILE__)
    ]
];
// instantiate a tercero broker client
$bc = new gacWorkQueueClient($file . AT . __LINE__, BROKER_QUEUE_S);
if (!$bc->status) {
    // create a new failed-session event and exit
    $data = [
        SYSTEM_EVENT_NAME => ERROR_BROKER_CLIENT_DECLARE . BROKER_QUEUE_S,
        SYSTEM_EVENT_TYPE => SYSEV_TYPE_CLASS,
        SYSTEM_EVENT_CODE_LOC => $file . AT . __LINE__,
        SYSTEM_EVENT_META_DATA => $metaSysEv,
    ];
    /** @var gacMongoDB $feWidget */
    if (is_null($feWidget = grabWidget($metaFailedSessions, '', $errors))) {
        logout(ERROR_FAILED_TO_INSTANTIATE . TEMPLATE_CLASS_FAILED_SESSIONS);
    }
    $feWidget->_createRecord([$data]);
    $hdr = sprintf(INFO_LOC, $file, __LINE__);
    logout($hdr. ERROR_BROKER_CLIENT_DECLARE . BROKER_QUEUE_S);
}
// publish the tercero request
$bc->call(gzcompress(json_encode($request)));
// tercero will publish an update event for the original system event record if the session record was successfully saved