FamilyBook/app/Resource.php

<?php
/**
 * 资源（v12，用户 2026-10-01 第 8 条）：挂在**某个人名下**的附属信息。
 *
 * 形态：标题 + 一段文字 + 多个附件（证件扫描件、一寸照片、合同…）。
 * 访问：名下的人自己当然能看能改；另外可以**共享给多人**，各设只读 / 读写。
 *
 * 两条关键设计：
 *   ① **共享表里不含 owner**（`resource_shares` 只记"额外被共享的人"）——
 *      不然同一个人在两张表里各有一条，权限要取并集，改一处忘一处就会
 *      "本人反而看不了自己的东西"。
 *   ② **默认折叠**：一屏列出几十条正文会很长，列表只露标题行，点开才看正文与附件。
 *      折叠用原生 <details>，没有 JS 也能开合（app.js 不依赖它）。
 *
 * ⚠️ 与「名册」的分工：名册记录的是**这个人是谁**（生日、电话、关系）；
 *    资源记录的是**这个人名下有什么东西**（证书、账号、照片）。不要混。
 */

declare(strict_types=1);

namespace App;

final class Resource
{
    /** 资源的宿主类型（附件表用） */
    public const ATTACH = 'resource';

    /**
     * 我能看到的资源 = 我名下的 + 别人共享给我的。
     *
     * 返回的行里带 `perm`：'owner' / 'write' / 'read'（模板据此决定能不能改）。
     *
     * @param int    $personId 看的人（决定"我能看什么"）
     * @param int    $ownerId  0=不限归属；非 0=只看这个人（且必须是我能看到的）
     * @param string $keyword  标题 + 正文里搜
     */
    public static function all(int $familyId, int $personId, int $ownerId = 0, string $keyword = ''): array
    {
        $sql = 'SELECT r.*, p.name AS owner_name, p.avatar, p.avatar_color,
                       n.nickname AS owner_nick,
                       CASE WHEN r.owner_id = ? THEN "owner"
                            ELSE COALESCE((SELECT s.perm FROM resource_shares s
                                            WHERE s.resource_id = r.id AND s.person_id = ?), "read")
                       END AS perm
                  FROM resources r
                  JOIN persons p ON p.id = r.owner_id
                  LEFT JOIN nicknames n ON n.target_id = r.owner_id AND n.viewer_id = ?
                  LEFT JOIN resource_shares sh ON sh.resource_id = r.id AND sh.person_id = ?
                 WHERE r.family_id = ? AND (r.owner_id = ? OR sh.person_id IS NOT NULL)';
        $bind = [$personId, $personId, $personId, $personId, $familyId, $personId];
        if ($ownerId > 0) {
            $sql .= ' AND r.owner_id = ?';
            $bind[] = $ownerId;
        }
        $kw = trim($keyword);
        if ($kw !== '') {
            $sql .= ' AND (r.title LIKE ? OR r.content LIKE ?)';
            $like = '%' . $kw . '%';
            array_push($bind, $like, $like);
        }
        $sql .= ' ORDER BY r.updated_at DESC, r.id DESC';
        $st = Database::get()->prepare($sql);
        $st->execute($bind);
        return $st->fetchAll();
    }

    /** 一条资源（带归属人与我对它的权限；看不到返回 null） */
    public static function find(int $familyId, int $id, int $personId): ?array
    {
        $st = Database::get()->prepare(
            'SELECT r.*, p.name AS owner_name, p.avatar, p.avatar_color,
                    n.nickname AS owner_nick,
                    CASE WHEN r.owner_id = ? THEN "owner"
                         ELSE COALESCE((SELECT s.perm FROM resource_shares s
                                         WHERE s.resource_id = r.id AND s.person_id = ?), "read")
                    END AS perm
               FROM resources r
               JOIN persons p ON p.id = r.owner_id
               LEFT JOIN nicknames n ON n.target_id = r.owner_id AND n.viewer_id = ?
              WHERE r.id = ? AND r.family_id = ?'
        );
        $st->execute([$personId, $personId, $personId, $id, $familyId]);
        $r = $st->fetch();
        if (!$r) {
            return null;
        }
        // ⚠️ 权限在**这一层**判死：调用方拿到记录就一定是能看的。
        //    曾经想让模板自己判，结果是每条列表都要重复一遍 CASE WHEN。
        $mine = (int)$r['owner_id'] === $personId
             || self::isShared((int)$r['id'], $personId);
        if (!$mine) {
            return null;
        }
        return $r;
    }

    public static function canWrite(array $r, int $personId): bool
    {
        if ((int)($r['owner_id'] ?? 0) === $personId) {
            return true;
        }
        return ($r['perm'] ?? '') === 'write';
    }

    public static function isShared(int $resourceId, int $personId): bool
    {
        $st = Database::get()->prepare(
            'SELECT 1 FROM resource_shares WHERE resource_id = ? AND person_id = ?'
        );
        $st->execute([$resourceId, $personId]);
        return $st->fetchColumn() !== false;
    }

    /** @return int 新资源 id */
    public static function create(int $familyId, int $ownerId, ?int $createdBy, array $d): int
    {
        $db = Database::get();
        $db->prepare(
            'INSERT INTO resources (family_id, owner_id, title, content, created_by) VALUES (?,?,?,?,?)'
        )->execute([
            $familyId, $ownerId,
            self::title($d['title'] ?? ''),
            self::textOrNull($d['content'] ?? ''),
            $createdBy ?: null,
        ]);
        return (int)$db->lastInsertId();
    }

    public static function update(int $familyId, int $id, array $d): void
    {
        Database::get()->prepare(
            'UPDATE resources SET title = ?, content = ? WHERE id = ? AND family_id = ?'
        )->execute([
            self::title($d['title'] ?? ''),
            self::textOrNull($d['content'] ?? ''),
            $id, $familyId,
        ]);
    }

    public static function destroy(int $familyId, int $id): void
    {
        // 附件表没有外键（target_type 表达不了），删宿主时自己清存储对象
        \App\Attachment::removeAll(self::ATTACH, $id);
        Database::get()->prepare('DELETE FROM resources WHERE id = ? AND family_id = ?')
            ->execute([$id, $familyId]);
    }

    // ---------------- 共享 ----------------

    public static function shares(int $resourceId): array
    {
        $st = Database::get()->prepare(
            'SELECT s.person_id, s.perm, p.name, p.avatar, p.avatar_color
               FROM resource_shares s JOIN persons p ON p.id = s.person_id
              WHERE s.resource_id = ? ORDER BY p.id'
        );
        $st->execute([$resourceId]);
        return $st->fetchAll();
    }

    /**
     * 设共享。
     *
     * ⚠️ owner 自己**不进**共享表 —— 他本来就有全部权限，
     *    记进去只是多一条要维护的行（还会让"共享给谁"的列表里冒出自己）。
     */
    public static function setShare(int $resourceId, int $ownerId, int $personId, string $perm): void
    {
        if ($personId <= 0 || $personId === $ownerId) {
            self::dropShare($resourceId, $personId);
            return;
        }
        Database::get()->prepare(
            'INSERT INTO resource_shares (resource_id, person_id, perm) VALUES (?,?,?)
             ON DUPLICATE KEY UPDATE perm = VALUES(perm)'
        )->execute([$resourceId, $personId, $perm === 'write' ? 'write' : 'read']);
    }

    public static function dropShare(int $resourceId, int $personId): void
    {
        Database::get()->prepare('DELETE FROM resource_shares WHERE resource_id = ? AND person_id = ?')
            ->execute([$resourceId, $personId]);
    }

    public static function permWord(string $perm): string
    {
        return $perm === 'owner' ? '本人' : ($perm === 'write' ? '可读写' : '只读');
    }

    // ---------------- 小工具 ----------------

    private static function title(string $v): string
    {
        return mb_substr(trim($v), 0, 120, 'UTF-8');
    }

    private static function textOrNull(string $v): ?string
    {
        $v = trim($v);
        return $v !== '' ? $v : null;
    }
}