';
// 添加样式
$html .= '';
if (empty($chainData)) {
$html .= '
无法获取推荐链信息
';
} else {
$totalLevels = count($chainData);
$targetUserId = $chainData[count($chainData) - 1]['urs_user_id'];
$html .= "
推荐链路径 (共{$totalLevels}级)
";
foreach ($chainData as $index => $user) {
$isRoot = $user['is_root'];
$isCurrent = ($user['urs_user_id'] == $targetUserId);
$level = $totalLevels - $user['level'] - 1; // 重新计算显示级别
$nodeClass = 'chain-node';
if ($isRoot) {
$nodeClass .= ' root';
$levelName = '根用户';
$badgeClass = 'level-root';
} elseif ($isCurrent) {
$nodeClass .= ' current';
$levelName = '当前用户';
$badgeClass = 'level-' . min($level, 5);
} else {
$levelName = "第{$level}级推荐人";
$badgeClass = 'level-' . min($level, 5);
}
$html .= "
";
$html .= "
{$levelName}";
$html .= "
URS-{$user['urs_user_id']}";
if ($user['farm_user_id']) {
$html .= " → 农场用户ID: {$user['farm_user_id']} | {$user['username']} ({$user['nickname']})";
} else {
$html .= " →
未进入农场";
}
$html .= "
";
if (isset($user['referral_time'])) {
$html .= "推荐时间: {$user['referral_time']}";
}
if ($isRoot) {
$html .= "推荐链的起始用户";
} elseif ($isCurrent) {
$html .= "目标用户";
}
$html .= "
";
$html .= "
";
// 添加箭头（除了最后一个）
if ($index < count($chainData) - 1) {
$html .= '
↓ 推荐
';
}
}
}
$html .= '