discuzx回帖奖励功能分析
进入source\include\post\post_newreply.php文件，在438行附近找到如下代码：[*]if($thread['replycredit'] > 0 && $thread['authorid'] != $_G['uid'] && $_G['uid']) {
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如果$thread['replycredit']大于0，同时帖子作者不是当前登录用户，则进入下面的处理流程。
$thread['replycredit']为当前帖子的回帖奖励总积分。
[*]$replycredit_rule = DB::fetch_first("SELECT * FROM ".DB::table('forum_replycredit')." WHERE tid = '$_G' LIMIT 1");
[*]$have_replycredit = DB::result_first("SELECT COUNT(*) FROM ".DB::table('common_credit_log')." WHERE relatedid = '{$_G}' AND uid = '{$_G}' AND operation = 'RCA' LIMIT {$replycredit_rule['times']} ");
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$replycredit_rule为从forum_replycredit表中查询该帖的回帖奖励设置数组，具体格式为
[*]array(
[*] 'tid' => '帖子tid',
[*] 'extcredits' => '每次回帖的奖励积分',
[*] 'times' => '奖励次数',
[*] 'membertimes' => '每个人最多奖励的次数',
[*] 'random' => '中奖率',
[*] 'extcreditstype' => '奖励的积分类型',
[*])
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$have_replycredit为从common_credit_log表中查询该帖中当前登录用户的已奖励次数。
[*]if($replycredit_rule['membertimes'] - $have_replycredit > 0 && $thread['replycredit'] - $replycredit_rule['extcredits'] >= 0) {
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如 果该帖的每个人最多奖励次数$replycredit_rule['membertimes']大于该帖中当前登录用户的已奖励次 数$have_replycredit，同时该帖的回帖奖励总积分$thread['replycredit']大于或等于该帖每次回帖的奖励积 分$replycredit_rule['extcredits']。
[*]$replycredit_rule['extcreditstype'] = $replycredit_rule['extcreditstype'] ? $replycredit_rule['extcreditstype'] : $_G['setting']['creditstransextra'];
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$replycredit_rule['extcreditstype'] 为该帖奖励积分的积分类型，如果存在$replycredit_rule['extcreditstype']的话就 为$replycredit_rule['extcreditstype']，否则为$_G['setting'] ['creditstransextra']。
$_G['setting']['creditstransextra']为后台->全局->积分设置下设置的回帖奖励使用的积分。
[*]if($replycredit_rule['random'] > 0) {
[*] $rand = rand(1, 100);
[*] $rand_replycredit = $rand <= $replycredit_rule['random'] ? true : false ;
[*]} else {
[*] $rand_replycredit = true;
[*]}
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如果该帖回帖奖励的中奖率$replycredit_rule['random']大于0：
$rand为在1-100中间生成的一个随机数，如果$rand小于或等于$replycredit_rule['random']，则设置$rand_replycredit为true，否则为false。
如果该帖回帖奖励的中奖率$replycredit_rule['random']不大于0：
设置$rand_replycredit为true。
[*]if($rand_replycredit) {
[*] if(!$posttable) {
[*] $posttable = getposttablebytid($_G['tid']);
[*] }
[*] updatemembercount($_G['uid'], array($replycredit_rule['extcreditstype'] => $replycredit_rule['extcredits']), 1, 'RCA', $_G);
[*] DB::update($posttable, array('replycredit' => $replycredit_rule['extcredits']), array('pid' => $pid));
[*] DB::update("forum_thread", array('replycredit' => $thread['replycredit'] - $replycredit_rule['extcredits']), array('tid' => $_G));
[*]}
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如果存在$rand_replycredit：
[*]if(!$posttable) {
[*]$posttable = getposttablebytid($_G['tid']);
[*]}
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如果不存在回帖表$posttable，则通过tid获取$posttable。
[*]updatemembercount($_G['uid'], array($replycredit_rule['extcreditstype'] => $replycredit_rule['extcredits']), 1, 'RCA', $_G);
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根 据回帖奖励的规则，更新当前登录用户的积分：在原有积分基础 上+$replycredit_rule['extcredits']。$replycredit_rule['extcreditstype']为积分 类型，$replycredit_rule['extcredits']为奖励积分数。
[*]DB::update($posttable, array('replycredit' => $replycredit_rule['extcredits']), array('pid' => $pid));
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更新回帖表$posttable中当前用户回复的积分奖励。
[*]DB::update("forum_thread", array('replycredit' => $thread['replycredit'] - $replycredit_rule['extcredits']), array('tid' => $_G));
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$thread['replycredit'] - $replycredit_rule['extcredits']为计算回帖奖励的剩余总积分。
更新主题表forum_thread中当前帖子的回帖奖励总积分replycredit。
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