173 lines
2.5 KiB
PHP
173 lines
2.5 KiB
PHP
<?php
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namespace app\service;
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use app\model\Department;
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use app\model\User;
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class DepartmentService
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{
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/**
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* 获取部门及其所有下级部门 ID（含自身）。
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*
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* @return int[]
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*/
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public static function descendantIds(int $departmentId): array
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{
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$all = Department::field('id,parent_id')->select()->toArray();
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$childrenMap = [];
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foreach ($all as $row) {
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$parentId = (int) ($row['parent_id'] ?? 0);
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$childrenMap[$parentId][] = (int) $row['id'];
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}
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$result = [];
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$stack = [$departmentId];
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while ($stack) {
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$current = array_pop($stack);
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if (in_array($current, $result, true)) {
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continue;
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}
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$result[] = $current;
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foreach ($childrenMap[$current] ?? [] as $childId) {
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$stack[] = $childId;
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}
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}
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return $result;
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}
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/**
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* 构建带层级缩进的部门树（扁平列表，供下拉选择）。
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*/
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public static function treeOptions(): array
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{
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$rows = Department::order('sort_order')->order('id')->select()->toArray();
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$childrenMap = [];
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foreach ($rows as $row) {
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$parentId = (int) ($row['parent_id'] ?? 0);
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$childrenMap[$parentId][] = $row;
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}
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$options = [];
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self::walkTree($childrenMap, 0, 0, $options);
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return $options;
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}
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private static function walkTree(array $childrenMap, int $parentId, int $depth, array &$options): void
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{
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foreach ($childrenMap[$parentId] ?? [] as $row) {
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$prefix = $depth > 0 ? str_repeat(' ', $depth) . '└ ' : '';
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$options[] = [
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'id' => (int) $row['id'],
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'name' => $row['name'],
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'parent_id' => $row['parent_id'] ? (int) $row['parent_id'] : null,
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'label' => $prefix . $row['name'],
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'depth' => $depth,
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];
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self::walkTree($childrenMap, (int) $row['id'], $depth + 1, $options);
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}
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}
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/**
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* 获取某部门及下级部门内的所有用户 ID。
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*
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* @return int[]
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*/
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public static function userIdsInDepartments(array $departmentIds): array
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{
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if (empty($departmentIds)) {
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return [];
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}
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return User::whereIn('department_id', $departmentIds)->column('id');
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}
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}
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