Discuz home模块解析（二）

这篇文章将继续分析home模块其余的功能。

invite模块

invite模块是邀请注册或者成为好友功能，邀请功能可以在管理后台的全局->注册与访问控制中开启。普通用户邀请的链接如下：

http://127.0.0.1/home.php?mod=invite&id=8&c=zakbhb

管理员批量邀请的链接如下：

http://127.0.0.1/home.php?mod=invite&u=1&c=7219c3069259f602

用户通过该链接访问论坛，论坛调用invite模块进行认证等操作，invite模块的主要功能如下：

$id = intval($_GET['id']);//普通用户邀请链接的邀请码id
$uid = intval($_GET['u']);//管理员批量邀请链接的管理员id
$appid = intval($_GET['app']);
$acceptconfirm = false;//用户是否接受邀请
if($_G['setting']['regstatus'] < 2) {//论坛未开启邀请注册功能
	showmessage('not_open_invite', '', array(), array('return' => true));
}
if($_G['uid']) {//如果用户已登录
	//用户已登录状态下打开邀请链接，有接受邀请和忽略邀请两个选项，分别对应accept=yes和accept=no
	if($_GET['accept'] == 'yes') {
		$cookies = empty($_G['cookie']['invite_auth'])?array():explode(',', $_G['cookie']['invite_auth']);

		if(empty($cookies)) {
			showmessage('invite_code_error', '', array(), array('return' => true));
		}
		if(count($cookies) == 3) {
			$uid = intval($cookies[0]);
			$_GET['c'] = $cookies[1];
			$appid = intval($cookies[2]);
		} else {
			$id = intval($cookies[0]);
			$_GET['c'] = $cookies[1];
		}
		$acceptconfirm = true;

	} elseif($_GET['accept'] == 'no') {
		dsetcookie('invite_auth', '');
		showmessage('invite_accept_no', 'home.php');
	}
}

if($id) {//如果是普通邀请

	$invite = C::t('common_invite')->fetch($id);
	//检查邀请码是否一致
	if(empty($invite) || $invite['code'] != $_GET['c']) {
		showmessage('invite_code_error', '', array(), array('return' => true));
	}
	//邀请码已经使用过了
	if($invite['fuid'] && $invite['fuid'] != $_G['uid']) {
		showmessage('invite_code_fuid', '', array(), array('return' => true));
	}
	//邀请码失效检查
	if($invite['endtime'] && $_G['timestamp'] > $invite['endtime']) {
		C::t('common_invite')->delete($id);
		showmessage('invite_code_endtime_error', '', array(), array('return' => true));
	}

	$appid = $invite['appid'];
	$uid = $invite['uid'];

	$cookievar = "$id,$invite[code]";

} elseif ($uid) {//如果是批量邀请
	$id = 0;
	//检查邀请码
	$invite_code = space_key($uid, $appid);
	if($_GET['c'] != $invite_code) {//
		showmessage('invite_code_error', '', array(), array('return' => true));
	}
	//邀请者用户组检查
	$inviteuser = getuserbyuid($uid);
	loadcache('usergroup_'.$inviteuser['groupid']);
	if(!empty($_G['cache']['usergroup_'.$inviteuser['groupid']]) && $_G['cache']['usergroup_'.$inviteuser['groupid']]['inviteprice']) {
		showmessage('invite_code_error', '', array(), array('return' => true));
	}
	$cookievar = "$uid,$invite_code,$appid";
} else {
	showmessage('invite_code_error', '', array(), array('return' => true));
}
$userapp = array();
if($appid) {
	$userapp = C::t('common_myapp')->fetch($appid);
}
//获取管理员邀请者用户信息
$space = getuserbyuid($uid);
if(empty($space)) {
	showmessage('space_does_not_exist', '', array(), array('return' => true));
}
$jumpurl = $appid ? "userapp.php?mod=app&id=$appid&my_extra=invitedby_bi_{$uid}_$_GET[c]&my_suffix=Lw%3D%3D" : 'home.php?mod=space&uid='.$uid;
if($acceptconfirm) {//用户接受好友申请
	...
	//加为好友
	friend_make($space['uid'], $space['username']);

	if($id) {
		//邀请码设置为已使用
		C::t('common_invite')->update($id, array('fuid'=>$_G['uid'], 'fusername'=>$_G['username'], 'regdateline' => $_G['timestamp'], 'status' => 2));
		//加好友通知
		notification_add($uid, 'friend', 'invite_friend', array('actor' => '.$_G['uid'].'" target="_blank">'.$_G['username'].''), 1);
	}
	//将用户信息重表field_home中取出，合并到space变量中
	space_merge($space, 'field_home');
	if(!empty($space['privacy']['feed']['invite'])) {
		require_once libfile('function/feed');
		$tite_data = array('username' => '.$_G['uid'].'">'.$_G['username'].'');
		feed_add('friend', 'feed_invite', $tite_data, '', array(), '', array(), array(), '', '', '', 0, 0, '', $space['uid'], $space['username']);
	}
	//受邀请方接受邀请的积分奖励
	if($_G['setting']['inviteconfig']['inviteaddcredit']) {
		updatemembercount($_G['uid'],
			array($_G['setting']['inviteconfig']['inviterewardcredit'] => $_G['setting']['inviteconfig']['inviteaddcredit']));
	}
	//邀请方邀请用户的积分奖励
	if($_G['setting']['inviteconfig']['invitedaddcredit']) {
		updatemembercount($uid,
			array($_G['setting']['inviteconfig']['inviterewardcredit'] => $_G['setting']['inviteconfig']['invitedaddcredit']));
	}
	//
	include_once libfile('function/stat');
	updatestat($appid ? 'appinvite' : 'invite');

	showmessage('invite_friend_ok', $jumpurl);
} else {
	dsetcookie('invite_auth', $cookievar, 604800);
}
//获取邀请者用户信息
space_merge($space, 'count');
space_merge($space, 'field_home');
space_merge($space, 'profile');
//获取邀请者好友列表
$flist = array();
$query = C::t('home_friend')->fetch_all_by_uid($uid, 0, 12, true);
foreach($query as $value) {
	$value['uid'] = $value['fuid'];
	$value['username'] = $value['fusername'];
	$flist[] = $value;
}
$jumpurl = urlencode($jumpurl);
include_once template('home/invite');

magic模块

magic模块在discuz中是道具模块。道具模块的功能结构大致如下：

action	operation	说明
shop	index	道具商店默认页面
	hot	热销道具页面
	buy	购买页面及购买功能
	give	赠送页面及赠送功能
mybox	use	使用道具
	drop	丢弃道具
	give	赠送道具
log	uselog	道具使用日志
	buylog	道具购买日志
	givelog	道具赠送日志
	receivelog	道具获赠日志

接下来我们一一分析上面的功能：

shop–道具商店相关功能

道具商店index和hot页面和功能实现如下：

//在common_magic表中获取可用道具的总个数。
$magiccount = C::t('common_magic')->count_page($operation);
//生成翻页布局
$multipage = multi($magiccount, $_G['tpp'], $page, "home.php?mod=magic&action=shop&operation=$operation");
//在common_magic表中获取当前页面的道具列表。$_G['tpp']为每页道具数量，默认12。
foreach(C::t('common_magic')->fetch_all_page($operation, $start_limit, $_G['tpp']) as $magic) {
	//获取道具出售的折扣并计算出售价格，跟用户所在的用户组有关
	$magic['discountprice'] = $_G['group']['magicsdiscount'] ? intval($magic['price'] * ($_G['group']['magicsdiscount'] / 10)) : intval($magic['price']);
	$eidentifier = explode(':', $magic['identifier']);
	//获取道具图标
	if(count($eidentifier) > 1) {
		//这里可以看出道具也支持插件
		$magic['pic'] = 'source/plugin/'.$eidentifier[0].'/magic/magic_'.$eidentifier[1].'.gif';
	} else {
		$magic['pic'] = STATICURL.'image/magic/'.strtolower($magic['identifier']).'.gif';
	}
	$magiclist[] = $magic;
}
...
//输出最终页面
include template('home/space_magic');

道具商店购买功能实现如下：

...
if(!submitcheck('operatesubmit')) {//显示确认购买窗口
	...
	//允许被使用道具的用户组
	if($magicperm['targetgroups']) {
		loadcache('usergroups');
		foreach(explode("\t", $magicperm['targetgroups']) as $_G['groupid']) {
			if(isset($_G['cache']['usergroups'][$_G['groupid']])) {
				$targetgroupperm .= $comma.$_G['cache']['usergroups'][$_G['groupid']]['grouptitle'];
				$comma = ' ';
			}
		}
	}
	//允许使用道具的版块
	if($magicperm['forum']) {
		loadcache('forums');
		foreach(explode("\t", $magicperm['forum']) as $fid) {
			if(isset($_G['cache']['forums'][$fid])) {
				$forumperm .= $comma.'.$fid.'" target="_blank">'.$_G['cache']['forums'][$fid]['name'].'';
				$comma = ' ';
			}
		}
	}
	//页面展示
	include template('home/space_magic_shop_opreation');
	dexit();
} else {//提交购买请求
	$magicnum = intval($_GET['magicnum']);
	$magic['weight'] = $magic['weight'] * $magicnum;
	$totalprice = $magic['discountprice'] * $magicnum;
	//价差价格及剩余数量
	if(getuserprofile('extcredits'.$magic['credit']) < $totalprice) {
		if($_G['setting']['ec_ratio'] && $_G['setting']['creditstrans'][0] == $magic['credit']) {
			showmessage('magics_credits_no_enough_and_charge', '', array('credit' => $_G['setting']['extcredits'][$magic['credit']]['title']));
		} else {
			showmessage('magics_credits_no_enough', '', array('credit' => $_G['setting']['extcredits'][$magic['credit']]['title']));
		}
	} elseif($magic['num'] < $magicnum) {
		showmessage('magics_num_no_enough');
	} elseif(!$magicnum || $magicnum < 0) {
		showmessage('magics_num_invalid');
	}
	//在common_member_magic表中为用户添加道具
	getmagic($magic['magicid'], $magicnum, $magic['weight'], $totalweight, $_G['uid'], $_G['group']['maxmagicsweight']);
	//在common_magiclog表中添加道具购买记录
	updatemagiclog($magic['magicid'], '1', $magicnum, $magic['price'].'|'.$magic['credit'], $_G['uid']);
	//更新道具存量
	C::t('common_magic')->update_salevolume($magic['magicid'], $magicnum);
	//在common_member_count表中更新用户积分信息
	updatemembercount($_G['uid'], array($magic['credit'] => -$totalprice), true, 'BMC', $magic['magicid']);
	//购买成功
	showmessage('magics_buy_succeed', 'home.php?mod=magic&action=mybox', array('magicname' => $magic['name'], 'num' => $magicnum, 'credit' => $totalprice.' '.$_G['setting']['extcredits'][$magic['credit']]['unit'].$_G['setting']['extcredits'][$magic['credit']]['title']));
}

赠送道具：

//该用户组不允许使用道具，包括赠送
if($_G['group']['allowmagics'] < 2) {
	showmessage('magics_nopermission');
}
...
if(!submitcheck('operatesubmit')) {//赠送道具确认窗口

	include libfile('function/friend');
	$buddyarray = friend_list($_G['uid'], 20);//可选的朋友列表
	include template('home/space_magic_shop_opreation');
	dexit();

} else {//确认赠送道具
	...
	//检查金币、存量等是否足够
	if(getuserprofile('extcredits'.$magic['credit']) < $totalprice) {
		if($_G['setting']['ec_ratio'] && $_G['setting']['creditstrans'][0] == $magic['credit']) {
			showmessage('magics_credits_no_enough_and_charge', '', array('credit' => $_G['setting']['extcredits'][$magic['credit']]['title']));
		} else {
			showmessage('magics_credits_no_enough', '', array('credit' => $_G['setting']['extcredits'][$magic['credit']]['title']));
		}
	} elseif($magic['num'] < $magicnum) {
		showmessage('magics_num_no_enough');
	} elseif(!$magicnum || $magicnum < 0) {
		showmessage('magics_num_invalid');
	}
	...
	//在common_member_magic表中给用户添加道具
	givemagic($toname, $magic['magicid'], $magicnum, $magic['num'], $totalprice, $givemessage, $magicarray);
	//更新道具存量
	C::t('common_magic')->update_salevolume($magic['magicid'], $magicnum);
	//在common_member_count表中更新用户积分信息
	updatemembercount($_G['uid'], array($magic['credit'] => -$totalprice), true, 'BMC', $magicid);
	showmessage('magics_buygive_succeed', 'home.php?mod=magic&action=shop', array('magicname' => $magic['name'], 'toname' => $toname, 'num' => $magicnum, 'credit' => $_G['setting']['extcredits'][$magic['credit']]['title'].' '.$totalprice.' '.$_G['setting']['extcredits'][$magic['credit']]['unit']), array('locationtime' => true));

}

mybox我的道具中的功能和上述的功能基本类似，所以不做分析。log道具记录功能基本是对common_magiclog表的查询，所以此处也不做分析。

follow模块

follow模块是跟动态相关的功能，有关注、特别关注的区别，也有广播大厅可以看到所有动态。此功能在discuz中称作广播。广播功能可以在管理后台->全局->站点功能中开启。

其主要实现代码在/source/module/home/home_follow.php中。用户之间的关注关系存在表home_follow中。用户发表的动态存在home_follow_feed表中，本质上每条动态都是一个帖子，通过home_follow_feed表中的tid在forum_threadpreview表或者forum_thread表中找到动态的内容。