first commit

application/service/MenuService.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2018/11/13 0013
+ * Time: 上午 10:50
+ */
+namespace app\service;
+
+use think\Collection;
+
+class MenuService
+{
+
+	/**
+	 * 树形结构
+	 *
+	 * @time at 2018年11月13日
+	 * @param $menu
+	 * @return Collection
+	 */
+	public function tree(Collection $menus, int $pid = 0)
+	{
+		$collection = new Collection();
+
+		$menus->each(function ($item, $key) use ($pid, $menus, $collection){
+				if ($item->pid == $pid) {
+					$collection[$key] = $item;
+					$collection[$key][$item->id] = $this->tree($menus, $item->id);
+				}
+		});
+
+		return $collection;
+	}
+
+	/**
+	 * 顺序结构
+	 *
+	 * @time at 2018年11月13日
+	 * @param $menu
+	 * @return Collection
+	 */
+	public function sort(Collection $menus, int $pid = 0, int $level = 0)
+	{
+		$collection = [];
+		foreach ($menus as $menu) {
+			if ($menu->pid == $pid) {
+				$menu->level = $level;
+				$collection[] = $menu;
+				$collection  = array_merge($collection, $this->sort($menus, $menu->id, $level+1));
+			}
+		}
+		return $collection;
+	}
+}