2026-09-30 08:13:07 +08:00
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<?php
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/**
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* 亲属关系表的读写。
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*
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* 只维护两种边(详见 Kinship 的头注释):
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* parent : from 是 to 的父/母
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* spouse : from 与 to 是配偶(对称,只存一条)
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*
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* ⚠️ 血缘关系必须**防环**:如果把 A 设为 B 的父亲、又顺手把 B 设成 A 的父亲,
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* 家谱展开会变成死循环。addParent() 在写库前先检查。
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*/
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declare(strict_types=1);
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namespace App;
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final class Relations
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{
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/** 给某人指定一位父/母 */
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public static function addParent(int $familyId, int $childId, int $parentId, string $role): array
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{
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$role = $role === 'mother' ? 'mother' : 'father';
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if ($childId === $parentId) {
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return ['ok' => false, 'error' => '不能把自己设成自己的父母。'];
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}
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if (self::wouldCycle($familyId, $parentId, $childId)) {
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return ['ok' => false, 'error' => '这样会让两个人互为祖辈,关系说不通,已拒绝。'];
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}
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// 同一位父母只能有一个「父亲」和一个「母亲」位
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$db = Database::get();
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$st = $db->prepare(
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'DELETE FROM relations WHERE family_id = ? AND to_id = ? AND kind = "parent" AND from_role = ?'
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);
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$st->execute([$familyId, $childId, $role]);
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$st = $db->prepare(
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'INSERT INTO relations (family_id, from_id, to_id, kind, from_role) VALUES (?,?,?,"parent",?)'
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);
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$st->execute([$familyId, $parentId, $childId, $role]);
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2026-09-30 16:12:28 +08:00
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// 家谱变了 ⇒ 全家每个账号的 kin 名册条目按新树对齐(v7,三处口径一致)
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PersonRoster::syncKinForFamily($familyId);
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2026-09-30 08:13:07 +08:00
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return ['ok' => true, 'error' => ''];
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}
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/** 互为配偶(对称,只存一条;若已存在反向的记录则视为重复) */
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public static function addSpouse(int $familyId, int $a, int $b): array
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{
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if ($a === $b) {
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return ['ok' => false, 'error' => '不能把自己设成自己的配偶。'];
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}
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$db = Database::get();
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$st = $db->prepare(
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'SELECT id FROM relations
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WHERE family_id = ? AND kind = "spouse"
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AND ((from_id = ? AND to_id = ?) OR (from_id = ? AND to_id = ?))'
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);
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$st->execute([$familyId, $a, $b, $b, $a]);
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if ($st->fetchColumn()) {
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2026-09-30 16:12:28 +08:00
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// 已存在 ≠ 什么都不做:名册那边可能还没跟上(老数据/升级前建的边),补一次
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PersonRoster::syncKinForFamily($familyId);
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2026-09-30 08:13:07 +08:00
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return ['ok' => true, 'error' => ''];
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}
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$st = $db->prepare(
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'INSERT INTO relations (family_id, from_id, to_id, kind) VALUES (?,?,?,"spouse")'
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);
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$st->execute([$familyId, $a, $b]);
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2026-10-02 22:08:13 +08:00
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// 重新加上了配偶 ⇒ 之前"解除过"的标记要撤掉,
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// 否则互补推导会一直跳过这一对(连带影响他们的孩子只挂一位家长)。
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self::clearPairUndone($familyId, $a, $b);
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2026-09-30 16:12:28 +08:00
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PersonRoster::syncKinForFamily($familyId);
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2026-09-30 08:13:07 +08:00
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return ['ok' => true, 'error' => ''];
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}
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2026-09-30 16:12:28 +08:00
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/**
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* 解除某条关系(按 id)。
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*
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* ⚠️ v7 起「家谱树 ⇒ 名册自动同步」:边没了,树上够不着的人的 kin 名册条目
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* 也跟着撤(可能不止这一对——比如解开「父子」,孩子就从配偶的名册里一起消失,
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* 因为树是从配偶那边绕过我来展开的)。self/shared/seeded 的条目绝不碰。
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*
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* @return int 撤掉的 kin 名册条目数(路由层用它把话说全)
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*/
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public static function remove(int $familyId, int $id): int
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2026-09-30 08:13:07 +08:00
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{
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2026-09-30 16:12:28 +08:00
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$db = Database::get();
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2026-10-02 22:08:13 +08:00
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// ⚠️ 删之前先读出来:如果是**配偶**边,要把它记进「显式解除」名单,
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// 否则 Kinship::graph() 的互补推导会凭"共同孩子"把两人又配回夫妻,
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// 用户看到的现象是「解除了却还在」。
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$row = $db->prepare('SELECT from_id, to_id, kind FROM relations WHERE id = ? AND family_id = ?');
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$row->execute([$id, $familyId]);
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$r = $row->fetch(\PDO::FETCH_ASSOC);
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if ($r && $r['kind'] === 'spouse') {
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self::markPairUndone($familyId, (int)$r['from_id'], (int)$r['to_id']);
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}
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2026-09-30 16:12:28 +08:00
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$db->prepare('DELETE FROM relations WHERE id = ? AND family_id = ?')
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2026-09-30 08:13:07 +08:00
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->execute([$id, $familyId]);
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2026-09-30 16:12:28 +08:00
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$st = PersonRoster::syncKinForFamily($familyId);
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return (int)$st['dropped'];
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2026-09-30 08:13:07 +08:00
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}
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2026-10-02 22:08:13 +08:00
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/**
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* 记下「这一对已经被人为解除过夫妻关系」。
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*
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* 为什么要记:家谱的关系是**推导**出来的(`Kinship::graph()` 会把
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* 「同一个孩子的两位家长」认成夫妻、把「唯一配偶」补成另一位家长)。
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* 于是「解除配偶」如果只删库里的边,推导会立刻用共同孩子把两人配回来 ——
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* 用户点了解除、刷新还在,等于功能失效。
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* 记进 settings 的 `kin_undone_pairs`(不动表结构),推导时跳过这些对。
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*/
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public static function markPairUndone(int $familyId, int $a, int $b): void
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{
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if ($a <= 0 || $b <= 0 || $a === $b) { return; }
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$key = $a < $b ? "$a-$b" : "$b-$a";
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$list = self::undonePairs($familyId);
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if (!in_array($key, $list, true)) {
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$list[] = $key;
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Setting::set($familyId, 'kin_undone_pairs', implode(',', $list));
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}
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}
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/** 已被显式解除过的夫妻对('小id-大id' 形式),推导时跳过 */
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public static function undonePairs(int $familyId): array
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{
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$v = (string)Setting::get($familyId, 'kin_undone_pairs', '');
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if ($v === '') { return []; }
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return array_values(array_filter(array_map('trim', explode(',', $v)), static fn($x) => $x !== ''));
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}
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/** 这对是否被显式解除过(顺序无关) */
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public static function isPairUndone(int $familyId, int $a, int $b): bool
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{
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if ($a <= 0 || $b <= 0 || $a === $b) { return false; }
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$key = $a < $b ? "$a-$b" : "$b-$a";
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return in_array($key, self::undonePairs($familyId), true);
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}
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/**
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* 重新建立关系时,把它从「显式解除」名单里抹掉
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* (不然用户重新加了配偶,推导还是把它当解除过 → 又少一处关系)。
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*/
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public static function clearPairUndone(int $familyId, int $a, int $b): void
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{
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if ($a <= 0 || $b <= 0 || $a === $b) { return; }
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$key = $a < $b ? "$a-$b" : "$b-$a";
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$list = array_values(array_filter(self::undonePairs($familyId), static fn($x) => $x !== $key));
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Setting::set($familyId, 'kin_undone_pairs', implode(',', $list));
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}
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2026-09-30 16:12:28 +08:00
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/** 解除两人之间的某种关系(与 remove() 同样的名册同步语义;当前无其他调用方) */
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2026-09-30 08:13:07 +08:00
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public static function detach(int $familyId, int $personId, string $kind, string $role = ''): void
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{
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$sql = 'DELETE FROM relations WHERE family_id = ? AND to_id = ? AND kind = ? AND from_role = ?';
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Database::get()->prepare($sql)->execute([$familyId, $personId, $kind, $role]);
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2026-09-30 16:12:28 +08:00
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PersonRoster::syncKinForFamily($familyId);
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2026-09-30 08:13:07 +08:00
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}
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/** 某人身上挂着的全部关系(详情页编辑用) */
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public static function forPerson(int $familyId, int $personId): array
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{
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$st = Database::get()->prepare(
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'SELECT r.*,
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pf.name AS from_name, pt.name AS to_name
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FROM relations r
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JOIN persons pf ON pf.id = r.from_id
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JOIN persons pt ON pt.id = r.to_id
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WHERE r.family_id = ? AND (r.from_id = ? OR r.to_id = ?)
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ORDER BY r.kind, r.id'
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);
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$st->execute([$familyId, $personId, $personId]);
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return $st->fetchAll();
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}
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/**
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* 防环:若把 $maybeAncestor 挂到 $node 之上,会不会绕回自己?
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* 做法是顺着 parent 边从 $maybeAncestor 往上走,看能否走到 $node。
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*/
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private static function wouldCycle(int $familyId, int $maybeAncestor, int $node): bool
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{
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$st = Database::get()->prepare(
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'SELECT from_id FROM relations WHERE family_id = ? AND to_id = ? AND kind = "parent"'
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);
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$stack = [$maybeAncestor];
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$seen = [];
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while ($stack) {
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$cur = array_pop($stack);
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if ($cur === $node) {
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return true;
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}
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if (isset($seen[$cur])) {
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continue;
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}
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$seen[$cur] = true;
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$st->execute([$familyId, $cur]);
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foreach ($st->fetchAll(\PDO::FETCH_COLUMN) as $up) {
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$stack[] = (int)$up;
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}
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}
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return false;
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}
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/** 全家的关系条数(设置页/统计用) */
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public static function count(int $familyId): int
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{
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$st = Database::get()->prepare('SELECT COUNT(*) FROM relations WHERE family_id = ?');
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$st->execute([$familyId]);
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return (int)$st->fetchColumn();
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}
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}
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