gnu-social/plugins/YammerImport/lib/yammerrunner.php

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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;
/**
* Normalize our singleton state and give us a YammerRunner object to play with!
*
* @return YammerRunner
*/
public static function init()
{
$state = Yammer_state::staticGet('id', 1);
if (!$state) {
$state = self::initState();
}
return new YammerRunner($state);
}
private static function initState()
{
$state = new Yammer_state();
$state->id = 1;
$state->state = 'init';
$state->created = common_sql_now();
$state->modified = common_sql_now();
$state->insert();
return $state;
}
private function __construct($state)
{
$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);
$this->importer = new YammerImporter($this->client);
}
/**
* Check which state we're in
*
* @return string
*/
public function state()
{
return $this->state->state;
}
/**
* Is the import done, finished, complete, finito?
*
* @return boolean
*/
public function isDone()
{
$workStates = array('import-users', 'import-groups', 'fetch-messages', 'save-messages');
return ($this->state() == 'done');
}
/**
* Check if we have work to do in iterate().
*
* @return boolean
*/
public function hasWork()
{
$workStates = array('import-users', 'import-groups', 'fetch-messages', 'save-messages');
return in_array($this->state(), $workStates);
}
/**
* Blow away any current state!
*/
public function reset()
{
$this->state->delete();
$this->state = self::initState();
}
/**
* Start the authentication process! If all goes well, we'll get back a URL.
* Have the user visit that URL, log in on Yammer and verify the importer's
* permissions. They'll get back a verification code, which needs to be passed
* on to saveAuthToken().
*
* @return string URL
*/
public function requestAuth()
{
if ($this->state->state != 'init') {
throw ServerError("Cannot request Yammer auth; already there!");
}
$data = $this->client->requestToken();
$old = clone($this->state);
$this->state->state = 'requesting-auth';
$this->state->oauth_token = $data['oauth_token'];
$this->state->oauth_secret = $data['oauth_token_secret'];
$this->state->modified = common_sql_now();
$this->state->update($old);
return $this->client->authorizeUrl($this->state->oauth_token);
}
/**
* Now that the user's given us this verification code from Yammer, we can
* request a final OAuth token/secret pair which we can use to access the
* API.
*
* After success here, we'll be ready to move on and run through iterate()
* until the import is complete.
*
* @param string $verifier
* @return boolean success
*/
public function saveAuthToken($verifier)
{
if ($this->state->state != 'requesting-auth') {
throw ServerError("Cannot save auth token in Yammer import state {$this->state->state}");
}
$data = $this->client->accessToken($verifier);
$old = clone($this->state);
$this->state->state = 'import-users';
$this->state->oauth_token = $data['oauth_token'];
$this->state->oauth_secret = $data['oauth_token_secret'];
$this->state->modified = common_sql_now();
$this->state->update($old);
return true;
}
/**
* Once authentication is complete, we need to call iterate() a bunch of times
* until state() returns 'done'.
*
* @return boolean success
*/
public function iterate()
{
switch($this->state())
{
case 'init':
case 'requesting-auth':
// Neither of these should reach our background state!
common_log(LOG_ERR, "Non-background YammerImport state '$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 = $this->importer->importUser($item);
common_log(LOG_INFO, "Imported Yammer user " . $item['id'] . " as $user->nickname ($user->id)");
}
$this->state->users_page = $page;
}
$this->state->modified = common_sql_now();
$this->state->update($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.");
$this->state->state = 'fetch-messages';
} else {
foreach ($data as $item) {
$group = $this->importer->importGroup($item);
common_log(LOG_INFO, "Imported Yammer group " . $item['id'] . " as $group->nickname ($group->id)");
}
$this->state->groups_page = $page;
}
$this->state->modified = common_sql_now();
$this->state->update($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 = $data['messages'];
if (count($messages) == 0) {
common_log(LOG_INFO, "Finished fetching Yammer messages; moving on to save messages.");
$this->state->state = 'save-messages';
} else {
foreach ($messages as $item) {
Yammer_notice_stub::record($item['id'], $item);
$oldest = $item['id'];
}
$this->state->messages_oldest = $oldest;
}
$this->state->modified = common_sql_now();
$this->state->update($old);
return true;
}
private function iterateSaveMessages()
{
$old = clone($this->state);
$newest = intval($this->state->messages_newest);
$stub = new Yammer_notice_stub();
if ($newest) {
$stub->whereAdd('id > ' . $newest);
}
$stub->limit(20);
$stub->orderBy('id');
$stub->find();
if ($stub->N == 0) {
common_log(LOG_INFO, "Finished saving Yammer messages; import complete!");
$this->state->state = 'done';
} else {
while ($stub->fetch()) {
$item = $stub->getData();
$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->modified = common_sql_now();
$this->state->update($old);
return true;
}
}