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07ec659385
This project lived only on the server without version control. This is now the starting point for the repository.
86 lines
3.3 KiB
PHP
86 lines
3.3 KiB
PHP
<?php
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/*
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Question2Answer by Gideon Greenspan and contributors
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http://www.question2answer.org/
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Description: Functions for dealing with question hotness in the database
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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 General Public License for more details.
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More about this license: http://www.question2answer.org/license.php
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*/
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if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
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header('Location: ../../');
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exit;
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}
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/**
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* Increment the views counter for the post (if different IP from last view).
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* @param int $postid The ID of the post
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* @return bool Whether views were actually incremented.
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*/
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function qa_db_increment_views($postid)
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{
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$query = 'UPDATE ^posts SET views=views+1, lastviewip=UNHEX($) WHERE postid=# AND (lastviewip IS NULL OR lastviewip!=UNHEX($))';
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$ipHex = bin2hex(@inet_pton(qa_remote_ip_address()));
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qa_db_query_sub($query, $ipHex, $postid, $ipHex);
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return qa_db_affected_rows() > 0;
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}
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/**
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* Recalculate the hotness in the database for one or more posts.
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*
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* @param int $firstpostid First post to recalculate (or only post if $lastpostid is null).
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* @param int $lastpostid Last post in the range to recalculate.
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* @param bool $viewincrement Deprecated - view counter is now incremented separately. Previously, would increment the post's
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* views and include that in the hotness calculation.
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* @return void
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*/
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function qa_db_hotness_update($firstpostid, $lastpostid = null, $viewincrement = false)
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{
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if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
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if (!qa_should_update_counts()) {
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return;
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}
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if (!isset($lastpostid))
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$lastpostid = $firstpostid;
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$query = "UPDATE ^posts AS x, (SELECT parents.postid, MAX(parents.created) AS qcreated, COALESCE(MAX(children.created), MAX(parents.created)) as acreated, COUNT(children.postid) AS acount, MAX(parents.netvotes) AS netvotes, MAX(parents.views) AS views FROM ^posts AS parents LEFT JOIN ^posts AS children ON parents.postid=children.parentid AND children.type='A' WHERE parents.postid BETWEEN # AND # GROUP BY postid) AS a SET x.hotness=(" .
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'((TO_DAYS(a.qcreated)-734138)*86400.0+TIME_TO_SEC(a.qcreated))*# + ' . // zero-point is Jan 1, 2010
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'((TO_DAYS(a.acreated)-734138)*86400.0+TIME_TO_SEC(a.acreated))*# + ' .
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'(a.acount+0.0)*# + ' .
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'(a.netvotes+0.0)*# + ' .
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'(a.views+0.0)*#' .
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') WHERE x.postid=a.postid';
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// Additional multiples based on empirical analysis of activity on Q2A meta site to give approx equal influence for all factors
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$arguments = array(
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$firstpostid,
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$lastpostid,
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qa_opt('hot_weight_q_age'),
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qa_opt('hot_weight_a_age'),
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qa_opt('hot_weight_answers') * 160000,
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qa_opt('hot_weight_votes') * 160000,
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qa_opt('hot_weight_views') * 4000,
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);
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qa_db_query_raw(qa_db_apply_sub($query, $arguments));
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}
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