553 lines
14 KiB
PHP
553 lines
14 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: zhangyajun <448901948@qq.com>
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// +----------------------------------------------------------------------
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namespace think;
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use ArrayAccess;
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use ArrayIterator;
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use Countable;
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use IteratorAggregate;
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use JsonSerializable;
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class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
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{
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/**
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* 数据集数据
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* @var array
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*/
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protected $items = [];
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public function __construct($items = [])
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{
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$this->items = $this->convertToArray($items);
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}
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public static function make($items = [])
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{
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return new static($items);
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}
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/**
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* 是否为空
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* @access public
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* @return bool
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*/
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public function isEmpty()
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{
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return empty($this->items);
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}
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public function toArray()
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{
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return array_map(function ($value) {
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return ($value instanceof Model || $value instanceof self) ? $value->toArray() : $value;
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}, $this->items);
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}
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public function all()
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{
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return $this->items;
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}
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/**
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* 合并数组
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*
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* @access public
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* @param mixed $items
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* @return static
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*/
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public function merge($items)
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{
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return new static(array_merge($this->items, $this->convertToArray($items)));
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}
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/**
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* 交换数组中的键和值
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*
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* @access public
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* @return static
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*/
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public function flip()
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{
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return new static(array_flip($this->items));
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}
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/**
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* 按指定键整理数据
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*
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* @access public
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* @param mixed $items 数据
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* @param string $indexKey 键名
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* @return array
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*/
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public function dictionary($items = null, &$indexKey = null)
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{
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if ($items instanceof self || $items instanceof Paginator) {
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$items = $items->all();
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}
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$items = is_null($items) ? $this->items : $items;
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if ($items && empty($indexKey)) {
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$indexKey = is_array($items[0]) ? 'id' : $items[0]->getPk();
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}
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if (isset($indexKey) && is_string($indexKey)) {
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return array_column($items, null, $indexKey);
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}
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return $items;
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}
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/**
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* 比较数组，返回差集
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*
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* @access public
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* @param mixed $items 数据
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* @param string $indexKey 指定比较的键名
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* @return static
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*/
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public function diff($items, $indexKey = null)
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{
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if ($this->isEmpty() || is_scalar($this->items[0])) {
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return new static(array_diff($this->items, $this->convertToArray($items)));
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}
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$diff = [];
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$dictionary = $this->dictionary($items, $indexKey);
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if (is_string($indexKey)) {
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foreach ($this->items as $item) {
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if (!isset($dictionary[$item[$indexKey]])) {
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$diff[] = $item;
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}
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}
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}
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return new static($diff);
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}
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/**
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* 比较数组，返回交集
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*
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* @access public
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* @param mixed $items 数据
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* @param string $indexKey 指定比较的键名
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* @return static
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*/
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public function intersect($items, $indexKey = null)
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{
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if ($this->isEmpty() || is_scalar($this->items[0])) {
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return new static(array_diff($this->items, $this->convertToArray($items)));
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}
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$intersect = [];
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$dictionary = $this->dictionary($items, $indexKey);
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if (is_string($indexKey)) {
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foreach ($this->items as $item) {
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if (isset($dictionary[$item[$indexKey]])) {
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$intersect[] = $item;
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}
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}
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}
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return new static($intersect);
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}
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/**
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* 返回数组中所有的键名
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*
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* @access public
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* @return array
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*/
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public function keys()
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{
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$current = current($this->items);
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if (is_scalar($current)) {
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$array = $this->items;
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} elseif (is_array($current)) {
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$array = $current;
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} else {
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$array = $current->toArray();
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}
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return array_keys($array);
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}
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/**
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* 删除数组的最后一个元素（出栈）
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*
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* @access public
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* @return mixed
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*/
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public function pop()
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{
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return array_pop($this->items);
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}
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/**
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* 通过使用用户自定义函数，以字符串返回数组
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*
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* @access public
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* @param callable $callback
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* @param mixed $initial
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* @return mixed
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*/
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public function reduce(callable $callback, $initial = null)
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{
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return array_reduce($this->items, $callback, $initial);
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}
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/**
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* 以相反的顺序返回数组。
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*
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* @access public
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* @return static
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*/
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public function reverse()
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{
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return new static(array_reverse($this->items));
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}
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/**
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* 删除数组中首个元素，并返回被删除元素的值
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*
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* @access public
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* @return mixed
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*/
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public function shift()
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{
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return array_shift($this->items);
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}
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/**
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* 在数组结尾插入一个元素
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* @access public
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* @param mixed $value
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* @param mixed $key
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* @return void
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*/
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public function push($value, $key = null)
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{
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if (is_null($key)) {
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$this->items[] = $value;
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} else {
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$this->items[$key] = $value;
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}
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}
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/**
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* 把一个数组分割为新的数组块.
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*
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* @access public
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* @param int $size
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* @param bool $preserveKeys
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* @return static
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*/
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public function chunk($size, $preserveKeys = false)
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{
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$chunks = [];
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foreach (array_chunk($this->items, $size, $preserveKeys) as $chunk) {
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$chunks[] = new static($chunk);
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}
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return new static($chunks);
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}
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/**
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* 在数组开头插入一个元素
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* @access public
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* @param mixed $value
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* @param mixed $key
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* @return void
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*/
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public function unshift($value, $key = null)
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{
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if (is_null($key)) {
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array_unshift($this->items, $value);
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} else {
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$this->items = [$key => $value] + $this->items;
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}
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}
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/**
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* 给每个元素执行个回调
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*
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* @access public
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* @param callable $callback
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* @return $this
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*/
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public function each(callable $callback)
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{
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foreach ($this->items as $key => $item) {
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$result = $callback($item, $key);
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if (false === $result) {
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break;
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} elseif (!is_object($item)) {
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$this->items[$key] = $result;
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}
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}
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return $this;
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}
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/**
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* 用回调函数处理数组中的元素
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* @access public
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* @param callable|null $callback
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* @return static
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*/
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public function map(callable $callback)
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{
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return new static(array_map($callback, $this->items));
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}
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/**
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* 用回调函数过滤数组中的元素
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* @access public
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* @param callable|null $callback
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* @return static
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*/
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public function filter(callable $callback = null)
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{
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if ($callback) {
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return new static(array_filter($this->items, $callback));
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}
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return new static(array_filter($this->items));
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}
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/**
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* 根据字段条件过滤数组中的元素
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* @access public
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* @param string $field 字段名
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* @param mixed $operator 操作符
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* @param mixed $value 数据
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* @return static
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*/
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public function where($field, $operator, $value = null)
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{
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if (is_null($value)) {
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$value = $operator;
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$operator = '=';
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}
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return $this->filter(function ($data) use ($field, $operator, $value) {
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if (strpos($field, '.')) {
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list($field, $relation) = explode('.', $field);
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$result = isset($data[$field][$relation]) ? $data[$field][$relation] : null;
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} else {
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$result = isset($data[$field]) ? $data[$field] : null;
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}
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switch ($operator) {
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case '===':
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return $result === $value;
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case '!==':
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return $result !== $value;
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case '!=':
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case '<>':
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return $result != $value;
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case '>':
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return $result > $value;
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case '>=':
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return $result >= $value;
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case '<':
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return $result < $value;
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case '<=':
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return $result <= $value;
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case 'like':
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return is_string($result) && false !== strpos($result, $value);
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case 'not like':
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return is_string($result) && false === strpos($result, $value);
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case 'in':
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return is_scalar($result) && in_array($result, $value, true);
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case 'not in':
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return is_scalar($result) && !in_array($result, $value, true);
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case 'between':
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list($min, $max) = is_string($value) ? explode(',', $value) : $value;
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return is_scalar($result) && $result >= $min && $result <= $max;
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case 'not between':
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list($min, $max) = is_string($value) ? explode(',', $value) : $value;
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return is_scalar($result) && $result > $max || $result < $min;
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case '==':
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case '=':
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default:
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return $result == $value;
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}
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});
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}
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/**
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* 返回数据中指定的一列
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* @access public
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* @param mixed $columnKey 键名
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* @param mixed $indexKey 作为索引值的列
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* @return array
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*/
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public function column($columnKey, $indexKey = null)
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{
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return array_column($this->items, $columnKey, $indexKey);
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}
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/**
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* 对数组排序
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*
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* @access public
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* @param callable|null $callback
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* @return static
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*/
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public function sort(callable $callback = null)
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{
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$items = $this->items;
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$callback = $callback ?: function ($a, $b) {
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return $a == $b ? 0 : (($a < $b) ? -1 : 1);
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};
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uasort($items, $callback);
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return new static($items);
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}
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/**
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* 指定字段排序
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* @access public
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* @param string $field 排序字段
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* @param string $order 排序
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* @param bool $intSort 是否为数字排序
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* @return $this
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*/
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public function order($field, $order = null, $intSort = true)
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{
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return $this->sort(function ($a, $b) use ($field, $order, $intSort) {
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$fieldA = isset($a[$field]) ? $a[$field] : null;
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$fieldB = isset($b[$field]) ? $b[$field] : null;
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if ($intSort) {
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return 'desc' == strtolower($order) ? $fieldB >= $fieldA : $fieldA >= $fieldB;
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} else {
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return 'desc' == strtolower($order) ? strcmp($fieldB, $fieldA) : strcmp($fieldA, $fieldB);
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}
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});
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}
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/**
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* 将数组打乱
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*
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* @access public
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* @return static
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*/
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public function shuffle()
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{
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$items = $this->items;
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shuffle($items);
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return new static($items);
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}
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/**
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* 截取数组
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*
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* @access public
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* @param int $offset
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* @param int $length
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* @param bool $preserveKeys
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* @return static
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*/
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public function slice($offset, $length = null, $preserveKeys = false)
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{
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return new static(array_slice($this->items, $offset, $length, $preserveKeys));
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}
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// ArrayAccess
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public function offsetExists($offset)
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{
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return array_key_exists($offset, $this->items);
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}
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public function offsetGet($offset)
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{
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return $this->items[$offset];
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}
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public function offsetSet($offset, $value)
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{
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if (is_null($offset)) {
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$this->items[] = $value;
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} else {
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$this->items[$offset] = $value;
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}
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}
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public function offsetUnset($offset)
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{
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unset($this->items[$offset]);
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}
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//Countable
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public function count()
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{
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return count($this->items);
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}
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//IteratorAggregate
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public function getIterator()
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{
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return new ArrayIterator($this->items);
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}
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//JsonSerializable
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public function jsonSerialize()
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{
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return $this->toArray();
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}
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/**
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* 转换当前数据集为JSON字符串
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* @access public
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* @param integer $options json参数
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* @return string
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*/
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public function toJson($options = JSON_UNESCAPED_UNICODE)
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{
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return json_encode($this->toArray(), $options);
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}
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public function __toString()
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{
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return $this->toJson();
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}
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/**
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* 转换成数组
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*
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* @access public
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* @param mixed $items
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* @return array
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*/
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protected function convertToArray($items)
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{
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if ($items instanceof self) {
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return $items->all();
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}
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return (array) $items;
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}
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}
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