270 lines
7.5 KiB
PHP
270 lines
7.5 KiB
PHP
<?php
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/**
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* Data class for counting notice postings by date
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*
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* PHP version 5
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*
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* @category Data
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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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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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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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if (!defined('STATUSNET')) {
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exit(1);
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}
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require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
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/**
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* Data class for counting notices by date
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*
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* We make a separate sitemap for each notice posted by date.
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* To save ourselves some (not inconsiderable) processing effort,
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* we cache this data in the sitemap_notice_count table. Each
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* row represents a day since the site has been started, with a count
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* of notices posted on that day. Since, after the end of the day,
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* this number doesn't change, it's a good candidate for persistent caching.
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*
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* @category Data
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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 Sitemap_notice_count extends Managed_DataObject
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{
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public $__table = 'sitemap_notice_count'; // table name
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public $notice_date; // date primary_key not_null
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public $notice_count; // int(4)
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public $created;
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public $modified;
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/**
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* return table definition for DB_DataObject
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*
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* DB_DataObject needs to know something about the table to manipulate
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* instances. This method provides all the DB_DataObject needs to know.
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*
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* @return array array of column definitions
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*/
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function table()
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{
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return array('notice_date' => DB_DATAOBJECT_DATE + DB_DATAOBJECT_NOTNULL,
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'notice_count' => DB_DATAOBJECT_INT,
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'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL,
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'modified' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL);
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}
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/**
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* return key definitions for DB_DataObject
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*
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* DB_DataObject needs to know about keys that the table has; this function
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* defines them.
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*
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* @return array key definitions
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*/
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function keys()
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{
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return array('notice_date' => 'K');
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}
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/**
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* return key definitions for Memcached_DataObject
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*
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* Our caching system uses the same key definitions, but uses a different
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* method to get them.
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*
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* @return array key definitions
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*/
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function keyTypes()
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{
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return $this->keys();
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}
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static function getAll()
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{
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$noticeCounts = self::cacheGet('sitemap:notice:counts');
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if ($noticeCounts === false) {
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$snc = new Sitemap_notice_count();
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$snc->orderBy('notice_date DESC');
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// Fetch the first one to check up-to-date-itude
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$n = $snc->find(true);
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$today = self::today();
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$noticeCounts = array();
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if (!$n) { // No counts saved yet
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$noticeCounts = self::initializeCounts();
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} else if ($snc->notice_date < $today) { // There are counts but not up to today
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$noticeCounts = self::fillInCounts($snc->notice_date);
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} else if ($snc->notice_date == $today) { // Refresh today's
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$noticeCounts[$today] = self::updateToday();
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}
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// starts with second-to-last date
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while ($snc->fetch()) {
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$noticeCounts[$snc->notice_date] = $snc->notice_count;
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}
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// Cache notice counts for 4 hours.
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self::cacheSet('sitemap:notice:counts', $noticeCounts, null, time() + 4 * 60 * 60);
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}
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return $noticeCounts;
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}
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static function initializeCounts()
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{
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$firstDate = self::getFirstDate(); // awww
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$today = self::today();
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$counts = array();
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for ($d = $firstDate; $d <= $today; $d = self::incrementDay($d)) {
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$n = self::getCount($d);
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self::insertCount($d, $n);
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$counts[$d] = $n;
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}
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return $counts;
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}
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static function fillInCounts($lastDate)
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{
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$today = self::today();
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$counts = array();
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$n = self::getCount($lastDate);
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self::updateCount($lastDate, $n);
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$counts[$lastDate] = $n;
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for ($d = self::incrementDay($lastDate); $d <= $today; $d = self::incrementDay($d)) {
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$n = self::getCount($d);
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self::insertCount($d, $n);
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}
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return $counts;
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}
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static function updateToday()
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{
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$today = self::today();
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$n = self::getCount($today);
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self::updateCount($today, $n);
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return $n;
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}
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static function getCount($d)
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{
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$notice = new Notice();
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$notice->whereAdd('created BETWEEN "'.$d.' 00:00:00" AND "'.self::incrementDay($d).' 00:00:00"');
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$notice->whereAdd('is_local = ' . Notice::LOCAL_PUBLIC);
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$n = $notice->count();
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return $n;
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}
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static function insertCount($d, $n)
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{
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$snc = new Sitemap_notice_count();
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$snc->notice_date = DB_DataObject_Cast::date($d);
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$snc->notice_count = $n;
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$snc->created = common_sql_now();
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$snc->modified = $snc->created;
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if (!$snc->insert()) {
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common_log(LOG_WARNING, "Could not save user counts for '$d'");
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}
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}
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static function updateCount($d, $n)
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{
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$snc = Sitemap_notice_count::staticGet('notice_date', DB_DataObject_Cast::date($d));
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if (empty($snc)) {
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// TRANS: Exception
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throw new Exception(_m("No such registration date: $d."));
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}
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$orig = clone($snc);
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$snc->notice_date = DB_DataObject_Cast::date($d);
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$snc->notice_count = $n;
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$snc->created = common_sql_now();
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$snc->modified = $snc->created;
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if (!$snc->update($orig)) {
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common_log(LOG_WARNING, "Could not save user counts for '$d'");
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}
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}
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static function incrementDay($d)
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{
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$dt = self::dateStrToInt($d);
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return self::dateIntToStr($dt + 24 * 60 * 60);
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}
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static function dateStrToInt($d)
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{
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return strtotime($d.' 00:00:00');
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}
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static function dateIntToStr($dt)
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{
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return date('Y-m-d', $dt);
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}
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static function getFirstDate()
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{
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$n = new Notice();
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$n->selectAdd();
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$n->selectAdd('date(min(created)) as first_date');
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if ($n->find(true)) {
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return $n->first_date;
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} else {
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// Is this right?
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return self::dateIntToStr(time());
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}
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}
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static function today()
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{
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return self::dateIntToStr(time());
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}
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}
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