88 lines
2.9 KiB
PHP
88 lines
2.9 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace app\common\service;
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use app\admin\model\split\Link;
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use app\admin\model\split\Number;
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use think\Collection;
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/**
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* 分流链接落地页：查链、轮转选号、拼接跳转 URL、访问计数
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*/
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class SplitRedirectService
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{
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private SplitRoundRobinStore $roundRobinStore;
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public function __construct(?SplitRoundRobinStore $roundRobinStore = null)
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{
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$this->roundRobinStore = $roundRobinStore ?? new SplitRoundRobinStore();
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}
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/**
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* 根据链接码解析本次应跳转的加好友 URL；无效时返回 null
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*
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* @param string $linkCode 9 位链接码
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* @param string $clientIp 访客 IP（IP 防护开启时用于国家校验）
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*/
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public function resolveRedirectUrl(string $linkCode, string $clientIp = ''): ?string
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{
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$linkCode = SplitLinkCodeService::normalize($linkCode);
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if (!SplitLinkCodeService::isValidFormat($linkCode)) {
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return null;
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}
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$link = Link::where('link_code', $linkCode)
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->where('status', 'normal')
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->find();
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if (!$link) {
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return null;
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}
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$ipProtect = (int) $link->getAttr('ip_protect');
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$countries = (string) $link->getAttr('countries');
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if (!SplitIpProtectService::isAllowed($ipProtect, $countries, $clientIp)) {
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return null;
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}
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/** @var Collection<int, Number>|array<int, Number> $numbers */
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$numbers = Number::where('split_link_id', (int) $link['id'])
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->where('status', 'normal')
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->order('id', 'asc')
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->field('id,number,number_type,number_type_custom')
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->select();
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$count = is_countable($numbers) ? count($numbers) : 0;
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if ($count === 0) {
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return null;
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}
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$linkId = (int) $link->getAttr('id');
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$index = $this->roundRobinStore->nextIndex($linkId, $count);
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$list = $numbers instanceof \think\Collection ? $numbers->all() : (array) $numbers;
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$picked = $list[$index] ?? $list[0] ?? null;
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if ($picked === null) {
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return null;
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}
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$numberType = is_array($picked) ? (string) ($picked['number_type'] ?? '') : (string) $picked->getAttr('number_type');
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$numberValue = is_array($picked) ? (string) ($picked['number'] ?? '') : (string) $picked->getAttr('number');
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$numberCustom = is_array($picked)
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? (string) ($picked['number_type_custom'] ?? '')
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: (string) $picked->getAttr('number_type_custom');
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$redirectUrl = SplitFriendUrlBuilder::build($numberType, $numberValue, $numberCustom);
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if ($redirectUrl === '') {
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return null;
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}
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$numberId = is_array($picked) ? (int) ($picked['id'] ?? 0) : (int) $picked->getAttr('id');
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if ($numberId > 0) {
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Number::where('id', $numberId)->setInc('visit_count');
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}
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return $redirectUrl;
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}
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}
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