[moodle.git] / portfolio / type / mahara / lib.php

<?php

define('PORTFOLIO_MAHARA_ERR_NETWORKING_OFF', 'err_networkingoff');
define('PORTFOLIO_MAHARA_ERR_NOHOSTS', 'err_nomnethosts');
define('PORTFOLIO_MAHARA_ERR_INVALIDHOST', 'err_invalidhost');
define('PORTFOLIO_MAHARA_ERR_NOMNETAUTH', 'err_nomnetauth');

require_once($CFG->dirroot . '/lib/portfoliolib.php');
require_once($CFG->dirroot . '/mnet/lib.php');

define('PORTFOLIO_MAHARA_QUEUE', PORTFOLIO_TIME_HIGH);
define('PORTFOLIO_MAHARA_IMMEDIATE', PORTFOLIO_TIME_MODERATE);

class portfolio_plugin_mahara extends portfolio_plugin_pull_base {

    private $hosts; // used in the admin config form
    private $mnethost; // privately set during export from the admin config value (mnethostid)
    private $hostrecord; // the host record that corresponds to the peer
    private $token; // during-transfer token
    private $sendtype; // whatever mahara has said it can handle (immediate or queued)
    private $filesmanifest; // manifest of files to send to mahara (set during prepare_package and sent later)

    public static function get_allowed_config() {
        return array('mnethostid');
    }

    public static function supported_formats() {
        return array(PORTFOLIO_FORMAT_FILE);
    }

    public function expected_time($callertime) {
        if ($this->sendtype == PORTFOLIO_MAHARA_QUEUE) {
            return PORTFOLIO_TIME_FORCEQUEUE;
        }
        return $callertime;
    }

    public static function has_admin_config() {
        return true;
    }

    public function admin_config_form(&$mform) {
        $strrequired = get_string('required');
        $hosts = self::get_mnet_hosts(); // this is called by sanity check but it's ok because it's cached
        foreach ($hosts as $host) {
            $hosts[$host->id] = $host->name;
        }
        $mform->addElement('select', 'mnethostid', get_string('mnethost', 'portfolio_mahara'), $hosts);
        $mform->addRule('mnethostid', $strrequired, 'required', null, 'client');
    }

    public function instance_sanity_check() {
        // make sure the host record exists since we don't have referential integrity
        if (!is_enabled_auth('mnet')) {
            return PORTFOLIO_MAHARA_ERR_NOMNETAUTH;
        }
        try {
            $this->ensure_mnethost();
        }
        catch (portfolio_exception $e) {
            return PORTFOLIO_MAHARA_ERR_INVALIDHOST;
        }
        // make sure we have the right services
        $hosts = $this->get_mnet_hosts();
        if (!array_key_exists($this->get_config('mnethostid'), $hosts)) {
            return PORTFOLIO_MAHARA_ERR_INVALIDHOST;
        }
        return 0;
    }

    public static function plugin_sanity_check() {
        global $CFG, $DB;
        $errorcode = 0;
        if (!isset($CFG->mnet_dispatcher_mode) || $CFG->mnet_dispatcher_mode != 'strict') {
            $errorcode =  PORTFOLIO_MAHARA_ERR_NETWORKING_OFF;
        }
        if (!is_enabled_auth('mnet')) {
            $errorcode = PORTFOLIO_MAHARA_ERR_NOMNETAUTH;
        }
        if (!self::get_mnet_hosts()) {
            $errorcode =  PORTFOLIO_MAHARA_ERR_NOHOSTS;
        }
        return $errorcode;
    }

    private static function get_mnet_hosts() {
        global $DB, $CFG;
        static $hosts;
        if (isset($this) && is_object($this) && isset($this->hosts)) {
            return $this->hosts;
        } else if (!isset($this) && isset($hosts)) {
            return $hosts;
        }
        $hosts = $DB->get_records_sql('  SELECT
                                    h.id,
                                    h.wwwroot,
                                    h.ip_address,
                                    h.name,
                                    h.public_key,
                                    h.public_key_expires,
                                    h.transport,
                                    h.portno,
                                    h.last_connect_time,
                                    h.last_log_id,
                                    h.applicationid,
                                    a.name as app_name,
                                    a.display_name as app_display_name,
                                    a.xmlrpc_server_url
                                FROM {mnet_host} h
                                    JOIN {mnet_application} a ON h.applicationid=a.id
                                    JOIN {mnet_host2service} hs1 ON hs1.hostid = h.id
                                    JOIN {mnet_service} s1 ON hs1.serviceid = s1.id
                                    JOIN {mnet_host2service} hs2 ON hs2.hostid = h.id
                                    JOIN {mnet_service} s2 ON hs2.serviceid = s2.id
                                    JOIN {mnet_host2service} hs3 ON hs3.hostid = h.id
                                    JOIN {mnet_service} s3 ON hs3.serviceid = s3.id
                                WHERE
                                    h.id <> ? AND
                                    h.deleted = 0 AND
                                    a.name = ? AND
                                    s1.name = ? AND hs1.publish = ? AND
                                    s2.name = ? AND hs2.subscribe = ? AND
                                    s3.name = ? AND hs3.subscribe = ?',
                        array($CFG->mnet_localhost_id, 'mahara', 'sso_idp', 1, 'sso_sp', 1, 'pf', 1));;
        if (empty($hosts)) { $hosts = array(); }
        if (isset($this) && is_object($this)) {
            $this->hosts = $hosts;
        }
        return $hosts;
    }

    public function prepare_package() {
        $files = $this->exporter->get_tempfiles();
        foreach ($files as $f) {
            $this->filesmanifest[$f->get_contenthash()] = array(
                'filename' => $f->get_filename(),
                'sha1'     => $f->get_contenthash(),
            );
        }
        $zipper = new zip_packer();

        $filename = 'portfolio-export.zip';
        if ($newfile = $zipper->archive_to_storage($files, SYSCONTEXTID, 'portfolio_exporter', $this->exporter->get('id'), '/final/', $filename, $this->user->id)) {
            $this->set('file', $newfile);
            return true;
        }
        return false;
    }

    private function ensure_environment() {
        global $MNET;
        if (empty($MNET)) {
            $MNET = new mnet_environment();
            $MNET->init();
        } // no idea why this happens :(
    }

    public function send_package() {
        global $CFG;
        $this->ensure_environment();
        // send the 'content_ready' request to mahara
        require_once($CFG->dirroot . '/mnet/xmlrpc/client.php');
        $client = new mnet_xmlrpc_client();
        $client->set_method('portfolio/mahara/lib.php/send_content_ready');
        $client->add_param($this->token);
        $client->add_param($this->get('user')->username);
        $client->add_param($this->resolve_format());
        $client->add_param(array(
            'filesmanifest' => $this->filesmanifest,
            'zipfilesha1'   => $this->get('file')->get_contenthash()
        ));
        $client->add_param($this->get_export_config('wait'));
        $this->ensure_mnethost();
        if (!$client->send($this->mnethost)) {
            foreach ($client->error as $errormessage) {
                list($code, $message) = array_map('trim',explode(':', $errormessage, 2));
                $message .= "ERROR $code:<br/>$errormessage<br/>";
            }
            throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara', '', $message);
        }
        // we should get back...  an ok and a status
        // either we've been waiting a while and mahara has fetched the file or has queued it.
        $response = (object)$client->response;
        if (!$response->status) {
            throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara');
        }
        return true;
    }

    public function get_continue_url() {
        $this->ensure_mnethost();
        $this->ensure_environment();
        $mnetauth = get_auth_plugin('mnet');
        $remoteurl = '/artefact/file/';// @todo penny this might change later when we change formats.
        if (!$url = $mnetauth->start_jump_session($this->get_config('mnethostid'), $remoteurl)) {
            return false;
        }
        return $url;
    }

    public function steal_control($stage) {
        if ($stage != PORTFOLIO_STAGE_CONFIG) {
            return false;
        }
        global $CFG;
        return $CFG->wwwroot . '/portfolio/type/mahara/preconfig.php?id=' . $this->exporter->get('id');
    }

    public function verify_file_request_params($params) {
        return false;
        // the data comes from an xmlrpc request,
        // not a request to file.php
    }

    /**
    * sends the 'content_intent' ping to mahara
    * if all goes well, this will set the 'token' and 'sendtype' member variables.
    */
    public function send_intent() {
        global $CFG, $DB;
        require_once($CFG->dirroot . '/mnet/xmlrpc/client.php');
        $client = new mnet_xmlrpc_client();
        $client->set_method('portfolio/mahara/lib.php/send_content_intent');
        $client->add_param($this->get('user')->username);
        $this->ensure_mnethost();
        if (!$client->send($this->mnethost)) {
            foreach ($client->error as $errormessage) {
                list($code, $message) = array_map('trim',explode(':', $errormessage, 2));
                $message .= "ERROR $code:<br/>$errormessage<br/>";
            }
            throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara', '', $message);
        }
        // we should get back... the send type and a shared token
        $response = (object)$client->response;
        if (empty($response->sendtype) || empty($response->token)) {
            throw new portfolio_export_exception($this->get('exporter'), 'senddisallowed', 'portfolio_mahara');
        }
        switch ($response->sendtype) {
            case 'immediate':
                $this->sendtype = PORTFOLIO_MAHARA_IMMEDIATE;
                break;
            case 'queue':
                $this->sendtype = PORTFOLIO_MAHARA_QUEUE;
                break;
            case 'none':
            default:
                throw new portfolio_export_exception($this->get('exporter'), 'senddisallowed', 'portfolio_mahara');
        }
        $this->token = $response->token;
        $this->get('exporter')->save();
        // put the entry in the mahara queue table now too
        $q = new stdClass;
        $q->token = $this->token;
        $q->transferid = $this->get('exporter')->get('id');
        $DB->insert_record('portfolio_mahara_queue', $q);
    }

    private function ensure_mnethost() {
        if (!empty($this->hostrecord) && !empty($this->mnethost)) {
            return;
        }
        global $DB;
        if (!$this->hostrecord = $DB->get_record('mnet_host', array('id' => $this->get_config('mnethostid')))) {
            throw new portfolio_plugin_exception(PORTFOLIO_MAHARA_ERR_INVALIDHOST, 'portfolio_mahara');
        }
        $this->mnethost = new mnet_peer();
        $this->mnethost->set_wwwroot($this->hostrecord->wwwroot);
    }

    public static function mnet_publishes() {
        $pf= array();
        $pf['name']        = 'pf'; // Name & Description go in lang file
        $pf['apiversion']  = 1;
        $pf['methods']     = array('send_content_intent', 'send_content_ready', 'fetch_file');

        return array($pf);
    }

    /**
    * xmlrpc (mnet) function to get the file.
    * reads in the file and returns it base_64 encoded
    * so that it can be enrypted by mnet.
    *
    * @param string $token the token recieved previously during send_content_intent
    */
    public static function fetch_file($token) {
        global $DB, $MNET_REMOTE_CLIENT;;
        try {
            if (!$transferid = $DB->get_field('portfolio_mahara_queue', 'transferid', array('token' => $token))) {
                exit(mnet_server_fault(8009, 'could not find token'));
            }
            $exporter = portfolio_exporter::rewaken_object($transferid);
        } catch (portfolio_exception $e) {
            exit(mnet_server_fault(8010, 'invalid transfer id'));
        }
        if ($exporter->get('instance')->get_config('mnethostid') != $MNET_REMOTE_CLIENT->id) {
            exit(mnet_server_fault(8011, "remote host didn't match saved host"));
        }
        global $CFG;
        try {
            $i = $exporter->get('instance');
            $f = $i->get('file');
            if (empty($f)) {
                exit(mnet_server_fault(8012, 'could not find file in transfer object - weird error'));
            }
            $c = $f->get_content();
            $contents = base64_encode($c);
        } catch (Exception $e) {
            exit(mnet_server_fault(8013, 'could not get file to send'));
        }
        $exporter->process_stage_cleanup(true);
        return $contents;
    }

    public function cleanup() {
        global $DB;
        $DB->delete_records('portfolio_mahara_queue', array('transferid' => $this->get('exporter')->get('id'), 'token' => $this->token));
    }


    private function resolve_format() {
        $thisformat = $this->get_export_config('format');
        $allformats = portfolio_supported_formats();
        $thisobj = new $allformats[$thisformat];
        foreach ($this->supported_formats() as $f) {
            $class = $allformats[$f];
            if ($thisobj instanceof $class) {
                return $f;
            }
        }
    }
}

?>
Commit	Line	Data
254f2d05	1	<?php
	2
	3	define('PORTFOLIO_MAHARA_ERR_NETWORKING_OFF', 'err_networkingoff');
	4	define('PORTFOLIO_MAHARA_ERR_NOHOSTS', 'err_nomnethosts');
aae8cfdc	5	define('PORTFOLIO_MAHARA_ERR_INVALIDHOST', 'err_invalidhost');
7254f56e	6	define('PORTFOLIO_MAHARA_ERR_NOMNETAUTH', 'err_nomnetauth');
254f2d05	7
	8	require_once($CFG->dirroot . '/lib/portfoliolib.php');
	9	require_once($CFG->dirroot . '/mnet/lib.php');
	10
	11	define('PORTFOLIO_MAHARA_QUEUE', PORTFOLIO_TIME_HIGH);
	12	define('PORTFOLIO_MAHARA_IMMEDIATE', PORTFOLIO_TIME_MODERATE);
	13
	14	class portfolio_plugin_mahara extends portfolio_plugin_pull_base {
	15
	16	private $hosts; // used in the admin config form
	17	private $mnethost; // privately set during export from the admin config value (mnethostid)
	18	private $hostrecord; // the host record that corresponds to the peer
	19	private $token; // during-transfer token
	20	private $sendtype; // whatever mahara has said it can handle (immediate or queued)
	21	private $filesmanifest; // manifest of files to send to mahara (set during prepare_package and sent later)
	22
	23	public static function get_allowed_config() {
	24	return array('mnethostid');
	25	}
	26
	27	public static function supported_formats() {
	28	return array(PORTFOLIO_FORMAT_FILE);
	29	}
	30
	31	public function expected_time($callertime) {
	32	if ($this->sendtype == PORTFOLIO_MAHARA_QUEUE) {
	33	return PORTFOLIO_TIME_FORCEQUEUE;
	34	}
	35	return $callertime;
	36	}
	37
	38	public static function has_admin_config() {
	39	return true;
	40	}
	41
	42	public function admin_config_form(&$mform) {
254f2d05	43	$strrequired = get_string('required');
	44	$hosts = self::get_mnet_hosts(); // this is called by sanity check but it's ok because it's cached
	45	foreach ($hosts as $host) {
	46	$hosts[$host->id] = $host->name;
	47	}
	48	$mform->addElement('select', 'mnethostid', get_string('mnethost', 'portfolio_mahara'), $hosts);
	49	$mform->addRule('mnethostid', $strrequired, 'required', null, 'client');
	50	}
	51
aae8cfdc	52	public function instance_sanity_check() {
aae8cfdc	53	// make sure the host record exists since we don't have referential integrity
b0482154	54	if (!is_enabled_auth('mnet')) {
	55	return PORTFOLIO_MAHARA_ERR_NOMNETAUTH;
	56	}
aae8cfdc	57	try {
	58	$this->ensure_mnethost();
	59	}
	60	catch (portfolio_exception $e) {
	61	return PORTFOLIO_MAHARA_ERR_INVALIDHOST;
	62	}
	63	// make sure we have the right services
	64	$hosts = $this->get_mnet_hosts();
	65	if (!array_key_exists($this->get_config('mnethostid'), $hosts)) {
	66	return PORTFOLIO_MAHARA_ERR_INVALIDHOST;
	67	}
	68	return 0;
	69	}
254f2d05	70
254f2d05	71	public static function plugin_sanity_check() {
254f2d05	72	global $CFG, $DB;
	73	$errorcode = 0;
	74	if (!isset($CFG->mnet_dispatcher_mode) \|\| $CFG->mnet_dispatcher_mode != 'strict') {
	75	$errorcode = PORTFOLIO_MAHARA_ERR_NETWORKING_OFF;
	76	}
7254f56e	77	if (!is_enabled_auth('mnet')) {
	78	$errorcode = PORTFOLIO_MAHARA_ERR_NOMNETAUTH;
	79	}
254f2d05	80	if (!self::get_mnet_hosts()) {
	81	$errorcode = PORTFOLIO_MAHARA_ERR_NOHOSTS;
	82	}
254f2d05	83	return $errorcode;
	84	}
	85
	86	private static function get_mnet_hosts() {
	87	global $DB, $CFG;
	88	static $hosts;
	89	if (isset($this) && is_object($this) && isset($this->hosts)) {
	90	return $this->hosts;
	91	} else if (!isset($this) && isset($hosts)) {
	92	return $hosts;
	93	}
	94	$hosts = $DB->get_records_sql(' SELECT
	95	h.id,
	96	h.wwwroot,
	97	h.ip_address,
	98	h.name,
	99	h.public_key,
	100	h.public_key_expires,
	101	h.transport,
	102	h.portno,
	103	h.last_connect_time,
	104	h.last_log_id,
	105	h.applicationid,
	106	a.name as app_name,
	107	a.display_name as app_display_name,
	108	a.xmlrpc_server_url
	109	FROM {mnet_host} h
	110	JOIN {mnet_application} a ON h.applicationid=a.id
	111	JOIN {mnet_host2service} hs1 ON hs1.hostid = h.id
	112	JOIN {mnet_service} s1 ON hs1.serviceid = s1.id
	113	JOIN {mnet_host2service} hs2 ON hs2.hostid = h.id
	114	JOIN {mnet_service} s2 ON hs2.serviceid = s2.id
	115	JOIN {mnet_host2service} hs3 ON hs3.hostid = h.id
	116	JOIN {mnet_service} s3 ON hs3.serviceid = s3.id
	117	WHERE
	118	h.id <> ? AND
	119	h.deleted = 0 AND
	120	a.name = ? AND
	121	s1.name = ? AND hs1.publish = ? AND
	122	s2.name = ? AND hs2.subscribe = ? AND
	123	s3.name = ? AND hs3.subscribe = ?',
	124	array($CFG->mnet_localhost_id, 'mahara', 'sso_idp', 1, 'sso_sp', 1, 'pf', 1));;
	125	if (empty($hosts)) { $hosts = array(); }
	126	if (isset($this) && is_object($this)) {
	127	$this->hosts = $hosts;
	128	}
	129	return $hosts;
	130	}
	131
	132	public function prepare_package() {
	133	$files = $this->exporter->get_tempfiles();
	134	foreach ($files as $f) {
	135	$this->filesmanifest[$f->get_contenthash()] = array(
	136	'filename' => $f->get_filename(),
	137	'sha1' => $f->get_contenthash(),
	138	);
	139	}
	140	$zipper = new zip_packer();
	141
	142	$filename = 'portfolio-export.zip';
	143	if ($newfile = $zipper->archive_to_storage($files, SYSCONTEXTID, 'portfolio_exporter', $this->exporter->get('id'), '/final/', $filename, $this->user->id)) {
	144	$this->set('file', $newfile);
	145	return true;
	146	}
147	return false;
148	}
149
aed2937f	150	private function ensure_environment() {
254f2d05	151	global $MNET;
	152	if (empty($MNET)) {
	153	$MNET = new mnet_environment();
	154	$MNET->init();
	155	} // no idea why this happens :(
aed2937f	156	}
	157
	158	public function send_package() {
	159	global $CFG;
	160	$this->ensure_environment();
254f2d05	161	// send the 'content_ready' request to mahara
	162	require_once($CFG->dirroot . '/mnet/xmlrpc/client.php');
	163	$client = new mnet_xmlrpc_client();
	164	$client->set_method('portfolio/mahara/lib.php/send_content_ready');
	165	$client->add_param($this->token);
	166	$client->add_param($this->get('user')->username);
	167	$client->add_param($this->resolve_format());
1c597211	168	$client->add_param(array(
	169	'filesmanifest' => $this->filesmanifest,
	170	'zipfilesha1' => $this->get('file')->get_contenthash()
	171	));
254f2d05	172	$client->add_param($this->get_export_config('wait'));
	173	$this->ensure_mnethost();
	174	if (!$client->send($this->mnethost)) {
	175	foreach ($client->error as $errormessage) {
	176	list($code, $message) = array_map('trim',explode(':', $errormessage, 2));
	177	$message .= "ERROR $code:<br/>$errormessage<br/>";
	178	}
	179	throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara', '', $message);
	180	}
	181	// we should get back... an ok and a status
	182	// either we've been waiting a while and mahara has fetched the file or has queued it.
	183	$response = (object)$client->response;
	184	if (!$response->status) {
	185	throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara');
	186	}
	187	return true;
	188	}
	189
	190	public function get_continue_url() {
	191	$this->ensure_mnethost();
aed2937f	192	$this->ensure_environment();
	193	$mnetauth = get_auth_plugin('mnet');
	194	$remoteurl = '/artefact/file/';// @todo penny this might change later when we change formats.
	195	if (!$url = $mnetauth->start_jump_session($this->get_config('mnethostid'), $remoteurl)) {
	196	return false;
	197	}
	198	return $url;
254f2d05	199	}
	200
	201	public function steal_control($stage) {
	202	if ($stage != PORTFOLIO_STAGE_CONFIG) {
	203	return false;
	204	}
	205	global $CFG;
	206	return $CFG->wwwroot . '/portfolio/type/mahara/preconfig.php?id=' . $this->exporter->get('id');
	207	}
	208
	209	public function verify_file_request_params($params) {
	210	return false;
	211	// the data comes from an xmlrpc request,
	212	// not a request to file.php
	213	}
	214
	215	/**
	216	* sends the 'content_intent' ping to mahara
	217	* if all goes well, this will set the 'token' and 'sendtype' member variables.
	218	*/
	219	public function send_intent() {
	220	global $CFG, $DB;
	221	require_once($CFG->dirroot . '/mnet/xmlrpc/client.php');
	222	$client = new mnet_xmlrpc_client();
	223	$client->set_method('portfolio/mahara/lib.php/send_content_intent');
	224	$client->add_param($this->get('user')->username);
	225	$this->ensure_mnethost();
	226	if (!$client->send($this->mnethost)) {
	227	foreach ($client->error as $errormessage) {
	228	list($code, $message) = array_map('trim',explode(':', $errormessage, 2));
	229	$message .= "ERROR $code:<br/>$errormessage<br/>";
	230	}
	231	throw new portfolio_export_exception($this->get('exporter'), 'failedtoping', 'portfolio_mahara', '', $message);
	232	}
	233	// we should get back... the send type and a shared token
	234	$response = (object)$client->response;
	235	if (empty($response->sendtype) \|\| empty($response->token)) {
	236	throw new portfolio_export_exception($this->get('exporter'), 'senddisallowed', 'portfolio_mahara');
	237	}
	238	switch ($response->sendtype) {
	239	case 'immediate':
	240	$this->sendtype = PORTFOLIO_MAHARA_IMMEDIATE;
	241	break;
	242	case 'queue':
	243	$this->sendtype = PORTFOLIO_MAHARA_QUEUE;
	244	break;
	245	case 'none':
	246	default:
	247	throw new portfolio_export_exception($this->get('exporter'), 'senddisallowed', 'portfolio_mahara');
	248	}
	249	$this->token = $response->token;
	250	$this->get('exporter')->save();
	251	// put the entry in the mahara queue table now too
	252	$q = new stdClass;
	253	$q->token = $this->token;
	254	$q->transferid = $this->get('exporter')->get('id');
	255	$DB->insert_record('portfolio_mahara_queue', $q);
	256	}
	257
	258	private function ensure_mnethost() {
	259	if (!empty($this->hostrecord) && !empty($this->mnethost)) {
	260	return;
	261	}
	262	global $DB;
aae8cfdc	263	if (!$this->hostrecord = $DB->get_record('mnet_host', array('id' => $this->get_config('mnethostid')))) {
	264	throw new portfolio_plugin_exception(PORTFOLIO_MAHARA_ERR_INVALIDHOST, 'portfolio_mahara');
	265	}
254f2d05	266	$this->mnethost = new mnet_peer();
	267	$this->mnethost->set_wwwroot($this->hostrecord->wwwroot);
	268	}
	269
	270	public static function mnet_publishes() {
	271	$pf= array();
	272	$pf['name'] = 'pf'; // Name & Description go in lang file
	273	$pf['apiversion'] = 1;
	274	$pf['methods'] = array('send_content_intent', 'send_content_ready', 'fetch_file');
	275
	276	return array($pf);
	277	}
	278
	279	/**
	280	* xmlrpc (mnet) function to get the file.
	281	* reads in the file and returns it base_64 encoded
	282	* so that it can be enrypted by mnet.
	283	*
	284	* @param string $token the token recieved previously during send_content_intent
	285	*/
	286	public static function fetch_file($token) {
	287	global $DB, $MNET_REMOTE_CLIENT;;
	288	try {
aed2937f	289	if (!$transferid = $DB->get_field('portfolio_mahara_queue', 'transferid', array('token' => $token))) {
	290	exit(mnet_server_fault(8009, 'could not find token'));
	291	}
254f2d05	292	$exporter = portfolio_exporter::rewaken_object($transferid);
254f2d05	293	} catch (portfolio_exception $e) {
d5dfe1b3	294	exit(mnet_server_fault(8010, 'invalid transfer id'));
254f2d05	295	}
254f2d05	296	if ($exporter->get('instance')->get_config('mnethostid') != $MNET_REMOTE_CLIENT->id) {
d5dfe1b3	297	exit(mnet_server_fault(8011, "remote host didn't match saved host"));
254f2d05	298	}
254f2d05	299	global $CFG;
d5dfe1b3	300	try {
	301	$i = $exporter->get('instance');
	302	$f = $i->get('file');
	303	if (empty($f)) {
	304	exit(mnet_server_fault(8012, 'could not find file in transfer object - weird error'));
	305	}
	306	$c = $f->get_content();
	307	$contents = base64_encode($c);
	308	} catch (Exception $e) {
	309	exit(mnet_server_fault(8013, 'could not get file to send'));
	310	}
254f2d05	311	$exporter->process_stage_cleanup(true);
	312	return $contents;
	313	}
	314
	315	public function cleanup() {
	316	global $DB;
	317	$DB->delete_records('portfolio_mahara_queue', array('transferid' => $this->get('exporter')->get('id'), 'token' => $this->token));
	318	}
	319
	320
	321	private function resolve_format() {
	322	$thisformat = $this->get_export_config('format');
	323	$allformats = portfolio_supported_formats();
	324	$thisobj = new $allformats[$thisformat];
	325	foreach ($this->supported_formats() as $f) {
	326	$class = $allformats[$f];
	327	if ($thisobj instanceof $class) {
	328	return $f;
	329	}
	330	}
	331	}
254f2d05	332	}
	333
	334	?>