data structure for realtime channels
This commit is contained in:
Evan Prodromou
parent
cd05fc6aee
commit
8b957c6581
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@ -59,6 +59,27 @@ class RealtimePlugin extends Plugin
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array('notice' => '0000000000'));
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return true;
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}
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function onCheckSchema()
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{
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$schema = Schema::get();
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$schema->ensureTable('realtime_channel', Realtime_channel::schemaDef());
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return true;
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}
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function onAutoload($cls)
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{
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$dir = dirname(__FILE__);
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switch ($cls)
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{
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case 'Realtime_channel':
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include_once $dir.'/'.$cls.'.php';
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return false;
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default:
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return true;
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}
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}
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function onEndShowScripts($action)
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{
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@ -377,6 +398,10 @@ class RealtimePlugin extends Plugin
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$action_name = $action->trimmed('action');
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// FIXME: lists
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// FIXME: search (!)
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// FIXME:
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switch ($action_name) {
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case 'public':
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$path = array('public');
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@ -0,0 +1,178 @@
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<?php
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/**
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2011, StatusNet, Inc.
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*
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* A channel for real-time browser data
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*
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* PHP version 5
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Realtime
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2011 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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/**
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* A channel for real-time browser data
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*
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* For each user currently browsing the site, we want to know which page they're on
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* so we can send real-time updates to their browser.
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*
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* @category Realtime
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
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* @link http://status.net/
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*
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* @see DB_DataObject
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*/
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class Realtime_channel extends Managed_DataObject
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{
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const TIMEOUT = 1800; // 30 minutes
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public $__table = 'realtime_channel'; // table name
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public $user_id; // int -> user.id, can be null
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public $action; // string
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public $arg1; // argument
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public $arg2; // argument, usually null
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public $channel_key; // 128-bit shared secret key
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public $created; // created date
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public $modified; // modified date
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/**
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* Get an instance by key
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*
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* This is a utility method to get a single instance with a given key value.
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*
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* @param string $k Key to use to lookup (usually 'user_id' for this class)
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* @param mixed $v Value to lookup
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*
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* @return Realtime_channel object found, or null for no hits
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*
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*/
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function staticGet($k, $v=null)
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{
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return Managed_DataObject::staticGet('Realtime_channel', $k, $v);
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}
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/**
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* Get an instance by compound key
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*
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* @param array $kv array of key-value mappings
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*
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* @return Realtime_channel object found, or null for no hits
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*
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*/
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function pkeyGet($kv)
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{
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return Managed_DataObject::pkeyGet('Realtime_channel', $kv);
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}
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/**
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* The One True Thingy that must be defined and declared.
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*/
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public static function schemaDef()
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{
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return array(
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'description' => 'A channel of realtime notice data',
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'fields' => array(
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'user_id' => array('type' => 'int',
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'not null' => false,
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'description' => 'user viewing page; can be null'),
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'action' => array('type' => 'varchar',
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'length' => 255,
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'not null' => true,
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'description' => 'page being viewed'),
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'arg1' => array('type' => 'varchar',
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'length' => 255,
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'not null' => false,
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'description' => 'page argument, like username or tag'),
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'arg2' => array('type' => 'varchar',
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'length' => 255,
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'not null' => false,
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'description' => 'second page argument, like tag for showstream'),
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'channel_key' => array('type' => 'varchar',
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'length' => 32,
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'not null' => true,
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'description' => 'shared secret key for this channel'),
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'created' => array('type' => 'datetime',
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'not null' => true,
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'description' => 'date this record was created'),
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'modified' => array('type' => 'datetime',
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'not null' => true,
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'description' => 'date this record was modified'),
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),
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'primary key' => array('user_id', 'action', 'arg1', 'arg2'),
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'unique keys' => array('channel_key'),
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'foreign keys' => array(
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'realtime_channel_user_id_fkey' => array('user', array('user_id' => 'id')),
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),
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'indexes' => array(
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'realtime_channel_modified_idx' => array('modified'),
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),
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);
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}
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static function saveNew($user_id, $action, $arg1, $arg2)
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{
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$channel = self::getChannel($user_id, $action, $arg1, $arg2);
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$channel = new Realtime_channel();
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$channel->user_id = $user_id;
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$channel->action = $action;
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$channel->arg1 = $arg1;
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$channel->arg2 = $arg2;
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$channel->channel_key = common_good_rand(16); // 128-bit key, 32 hex chars
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$channel->created = common_sql_now();
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$channel->modified = $channel->created;
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$channel->insert();
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return $channel;
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}
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static function getChannel($user_id, $action, $arg1, $arg2)
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{
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$channel = self::pkeyGet(array('user_id' => $user_id,
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'action' => $action,
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'arg1' => $arg1,
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'arg2' => $arg2));
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// Ignore (and delete!) old channels
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if (!empty($channel)) {
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$modTime = strtotime($channel->modified);
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if ((time() - $modTime) > self::TIMEOUT) {
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$channel->delete();
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$channel = null;
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}
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}
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return $channel;
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}
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}
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