gnu-social/plugins/AnonymousFave/AnonymousFavePlugin.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* A plugin to allow anonymous users to favorite notices
*
* If you want to keep certain users from having anonymous faving for their
* notices initialize the plugin with the restricted array, e.g.:
*
* addPlugin(
* 'AnonymousFave',
* array('restricted' => array('spock', 'kirk', 'bones'))
* );
*
*
* PHP version 5
*
* 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/>.
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
define('ANONYMOUS_FAVE_PLUGIN_VERSION', '0.1');
/**
* Anonymous Fave plugin to allow anonymous (not logged in) users
* to favorite notices
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class AnonymousFavePlugin extends Plugin
{
// Array of users who should not have anon faving. The default is
// that anonymous faving is allowed for all users.
public $restricted = array();
function onArgsInitialize() {
// We always want a session because we're tracking anon users
common_ensure_session();
}
/**
* Hook for ensuring our tables are created
*
* Ensures the fave_tally table is there and has the right columns
*
* @return boolean hook return
*/
function onCheckSchema()
{
$schema = Schema::get();
// For storing total number of times a notice has been faved
$schema->ensureTable('fave_tally', Fave_tally::schemaDef());
return true;
}
function onEndShowHTML($action)
{
if (!common_logged_in()) {
// Set a place to return to when submitting forms
common_set_returnto($action->selfUrl());
}
}
function onEndShowScripts($action)
{
// Setup ajax calls for favoriting. Usually this is only done when
// a user is logged in.
$action->inlineScript('SN.U.NoticeFavor();');
}
function onStartInitializeRouter($m)
{
$m->connect('main/anonfavor', array('action' => 'AnonFavor'));
$m->connect('main/anondisfavor', array('action' => 'AnonDisFavor'));
return true;
}
function onStartShowNoticeOptions($item)
{
if (!common_logged_in()) {
$item->out->elementStart('div', 'notice-options');
$item->showFaveForm();
$item->out->elementEnd('div');
}
return true;
}
function onStartShowFaveForm($item)
{
if (!common_logged_in() && $this->hasAnonFaving($item)) {
$profile = AnonymousFavePlugin::getAnonProfile();
if (!empty($profile)) {
if ($profile->hasFave($item->notice)) {
$disfavor = new AnonDisFavorForm($item->out, $item->notice);
$disfavor->show();
} else {
$favor = new AnonFavorForm($item->out, $item->notice);
$favor->show();
}
}
}
return true;
}
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function onEndFavorNoticeForm($form, $notice)
{
$this->showTally($form->out, $notice);
}
function onEndDisFavorNoticeForm($form, $notice)
{
$this->showTally($form->out, $notice);
}
function showTally($out, $notice)
{
$tally = Fave_tally::ensureTally($notice->id);
if (!empty($tally)) {
$out->elementStart(
'div',
array(
'id' => 'notice-' . $notice->id . '-tally',
'class' => 'notice-tally'
)
);
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$out->elementStart('span', array('class' => 'fave-tally-title'));
// TRANS: Label for tally for number of times a notice was favored.
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$out->raw(sprintf(_m("Favored")));
$out->elementEnd('span');
$out->elementStart('span', array('class' => 'fave-tally'));
$out->raw($tally->count);
$out->elementEnd('span');
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$out->elementEnd('div');
}
}
function onEndFavorNotice($profile, $notice)
{
$tally = Fave_tally::increment($notice->id);
}
function onEndDisfavorNotice($profile, $notice)
{
$tally = Fave_tally::decrement($notice->id);
}
static function createAnonProfile()
{
// Get the anon user's IP, and turn it into a nickname
list($proxy, $ip) = common_client_ip();
// IP + time + random number should help to avoid collisions
$baseNickname = $ip . '-' . time() . '-' . common_random_hexstr(5);
$profile = new Profile();
$profile->nickname = $baseNickname;
$id = $profile->insert();
if (!$id) {
// TRANS: Server exception.
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throw new ServerException(_m("Could not create anonymous user session."));
}
// Stick the Profile ID into the nickname
$orig = clone($profile);
$profile->nickname = 'anon-' . $id . '-' . $baseNickname;
$result = $profile->update($orig);
if (!$result) {
// TRANS: Server exception.
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throw new ServerException(_m("Could not create anonymous user session."));
}
common_log(
LOG_INFO,
"AnonymousFavePlugin - created profile for anonymous user from IP: "
. $ip
. ', nickname = '
. $profile->nickname
);
return $profile;
}
static function getAnonProfile()
{
$token = $_SESSION['anon_token'];
$anon = base64_decode($token);
$profile = null;
if (!empty($anon) && substr($anon, 0, 5) == 'anon-') {
$parts = explode('-', $anon);
$id = $parts[1];
// Do Profile lookup by ID instead of nickname for safety/performance
$profile = Profile::getKV('id', $id);
} else {
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$profile = AnonymousFavePlugin::createAnonProfile();
// Obfuscate so it's hard to figure out the Profile ID
$_SESSION['anon_token'] = base64_encode($profile->nickname);
}
return $profile;
}
/**
* Determine whether a given NoticeListItem should have the
* anonymous fave/disfave form
*
* @param NoticeListItem $item
*
* @return boolean false if the profile associated with the notice is
* in the list of restricted profiles, otherwise
* return true
*/
function hasAnonFaving($item)
{
$profile = Profile::getKV('id', $item->notice->profile_id);
if (in_array($profile->nickname, $this->restricted)) {
return false;
}
return true;
}
/**
* Provide plugin version information.
*
* This data is used when showing the version page.
*
* @param array &$versions array of version data arrays; see EVENTS.txt
*
* @return boolean hook value
*/
function onPluginVersion(&$versions)
{
$url = 'http://status.net/wiki/Plugin:AnonymousFave';
$versions[] = array('name' => 'AnonymousFave',
'version' => ANONYMOUS_FAVE_PLUGIN_VERSION,
'author' => 'Zach Copley',
'homepage' => $url,
'rawdescription' =>
// TRANS: Plugin description.
_m('Allow anonymous users to favorite notices.'));
return true;
}
}