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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('STATUSNET')) {
exit(1);
}
/**
* State machine for running through Yammer import.
*
* @package YammerImportPlugin
* @author Brion Vibber <brion@status.net>
*/
class YammerRunner
{
private $state;
private $client;
private $importer;
function __construct()
{
$state = Yammer_state::staticGet('id', 1);
if (!$state) {
common_log(LOG_ERR, "No YammerImport state during import run. Should not happen!");
throw new ServerException('No YammerImport state during import run.');
}
$this->state = $state;
$this->client = new SN_YammerClient(
common_config('yammer', 'consumer_key'),
common_config('yammer', 'consumer_secret'),
$this->state->oauth_token,
$this->state->oauth_secret);
$this->importer = new YammerImporter($client);
}
public function iterate()
{
switch($state->state)
{
case null:
case 'requesting-auth':
// Neither of these should reach our background state!
common_log(LOG_ERR, "Non-background YammerImport state '$state->state' during import run!");
return false;
case 'import-users':
return $this->iterateUsers();
case 'import-groups':
return $this->iterateGroups();
case 'fetch-messages':
return $this->iterateFetchMessages();
case 'save-messages':
return $this->iterateSaveMessages();
default:
common_log(LOG_ERR, "Invalid YammerImport state '$state->state' during import run!");
return false;
}
}
/**
* Trundle through one 'page' return of up to 50 user accounts retrieved
* from the Yammer API, importing them as we go.
*
* When we run out of users, move on to groups.
*
* @return boolean success
*/
private function iterateUsers()
{
$old = clone($this->state);
$page = intval($this->state->users_page) + 1;
$data = $this->client->users(array('page' => $page));
if (count($data) == 0) {
common_log(LOG_INFO, "Finished importing Yammer users; moving on to groups.");
$this->state->state = 'import-groups';
} else {
foreach ($data as $item) {
$user = $imp->importUser($item);
common_log(LOG_INFO, "Imported Yammer user " . $item['id'] . " as $user->nickname ($user->id)");
}
$this->state->users_page = $page;
}
$this->state->update($old);
return true;
}
/**
* Trundle through one 'page' return of up to 20 user groups retrieved
* from the Yammer API, importing them as we go.
*
* When we run out of groups, move on to messages.
*
* @return boolean success
*/
private function iterateGroups()
{
$old = clone($this->state);
$page = intval($this->state->groups_page) + 1;
$data = $this->client->groups(array('page' => $page));
if (count($data) == 0) {
common_log(LOG_INFO, "Finished importing Yammer groups; moving on to messages.");
$this->state->state = 'import-messages';
} else {
foreach ($data as $item) {
$group = $imp->importGroup($item);
common_log(LOG_INFO, "Imported Yammer group " . $item['id'] . " as $group->nickname ($group->id)");
}
$this->state->groups_page = $page;
}
$this->state->update($old);
return true;
}
/**
* Trundle through one 'page' return of up to 20 public messages retrieved
* from the Yammer API, saving them to our stub table for future import in
* correct chronological order.
*
* When we run out of messages to fetch, move on to saving the messages.
*
* @return boolean success
*/
private function iterateFetchMessages()
{
$old = clone($this->state);
$oldest = intval($this->state->messages_oldest);
if ($oldest) {
$params = array('older_than' => $oldest);
} else {
$params = array();
}
$data = $this->client->messages($params);
$messages = $data['messages'];
if (count($data) == 0) {
common_log(LOG_INFO, "Finished fetching Yammer messages; moving on to save messages.");
$this->state->state = 'save-messages';
} else {
foreach ($data as $item) {
Yammer_notice_stub::record($item['id'], $item);
$oldest = $item['id'];
}
$this->state->messages_oldest = $oldest;
}
$this->state->update($old);
return true;
}
private function iterateSaveMessages()
{
$old = clone($this->state);
$newest = intval($this->state->messages_newest);
if ($newest) {
$stub->addWhere('id > ' . $newest);
}
$stub->limit(20);
$stub->find();
if ($stub->N == 0) {
common_log(LOG_INFO, "Finished saving Yammer messages; import complete!");
$this->state->state = 'done';
} else {
while ($stub->fetch()) {
$item = json_decode($stub->json_data);
$notice = $this->importer->importNotice($item);
common_log(LOG_INFO, "Imported Yammer notice " . $item['id'] . " as $notice->id");
$newest = $item['id'];
}
$this->state->messages_newest = $newest;
}
$this->state->update($old);
return true;
}
}
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