/
Paginator.php
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/
Paginator.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: zhangyajun <448901948@qq.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);
namespace think;
use ArrayAccess;
use ArrayIterator;
use Closure;
use Countable;
use DomainException;
use IteratorAggregate;
use JsonSerializable;
use think\paginator\driver\Bootstrap;
use Traversable;
/**
* 分页基础类
* @mixin Collection
*/
abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
{
/**
* 是否简洁模式
* @var bool
*/
protected $simple = false;
/**
* 数据集
* @var Collection
*/
protected $items;
/**
* 当前页
* @var int
*/
protected $currentPage;
/**
* 最后一页
* @var int
*/
protected $lastPage;
/**
* 数据总数
* @var integer|null
*/
protected $total;
/**
* 每页数量
* @var int
*/
protected $listRows;
/**
* 是否有下一页
* @var bool
*/
protected $hasMore;
/**
* 分页配置
* @var array
*/
protected $options = [
'var_page' => 'page',
'path' => '/',
'query' => [],
'fragment' => '',
];
/**
* 获取当前页码
* @var Closure
*/
protected static $currentPageResolver;
/**
* 获取当前路径
* @var Closure
*/
protected static $currentPathResolver;
/**
* @var Closure
*/
protected static $maker;
public function __construct($items, int $listRows, int $currentPage = 1, int $total = null, bool $simple = false, array $options = [])
{
$this->options = array_merge($this->options, $options);
$this->options['path'] = '/' != $this->options['path'] ? rtrim($this->options['path'], '/') : $this->options['path'];
$this->simple = $simple;
$this->listRows = $listRows;
if (!$items instanceof Collection) {
$items = Collection::make($items);
}
if ($simple) {
$this->currentPage = $this->setCurrentPage($currentPage);
$this->hasMore = count($items) > ($this->listRows);
$items = $items->slice(0, $this->listRows);
} else {
$this->total = $total;
$this->lastPage = (int) ceil($total / $listRows);
$this->currentPage = $this->setCurrentPage($currentPage);
$this->hasMore = $this->currentPage < $this->lastPage;
}
$this->items = $items;
}
/**
* @access public
* @param mixed $items
* @param int $listRows
* @param int $currentPage
* @param int $total
* @param bool $simple
* @param array $options
* @return Paginator
*/
public static function make($items, int $listRows, int $currentPage = 1, int $total = null, bool $simple = false, array $options = [])
{
if (isset(static::$maker)) {
return call_user_func(static::$maker, $items, $listRows, $currentPage, $total, $simple, $options);
}
return new Bootstrap($items, $listRows, $currentPage, $total, $simple, $options);
}
public static function maker(Closure $resolver)
{
static::$maker = $resolver;
}
protected function setCurrentPage(int $currentPage): int
{
if (!$this->simple && $currentPage > $this->lastPage) {
return $this->lastPage > 0 ? $this->lastPage : 1;
}
return $currentPage;
}
/**
* 获取页码对应的链接
*
* @access protected
* @param int $page
* @return string
*/
protected function url(int $page): string
{
if ($page <= 0) {
$page = 1;
}
if (strpos($this->options['path'], '[PAGE]') === false) {
$parameters = [$this->options['var_page'] => $page];
$path = $this->options['path'];
} else {
$parameters = [];
$path = str_replace('[PAGE]', (string) $page, $this->options['path']);
}
if (count($this->options['query']) > 0) {
$parameters = array_merge($this->options['query'], $parameters);
}
$url = $path;
if (!empty($parameters)) {
$url .= '?' . http_build_query($parameters, '', '&');
}
return $url . $this->buildFragment();
}
/**
* 自动获取当前页码
* @access public
* @param string $varPage
* @param int $default
* @return int
*/
public static function getCurrentPage(string $varPage = 'page', int $default = 1): int
{
if (isset(static::$currentPageResolver)) {
return call_user_func(static::$currentPageResolver, $varPage);
}
return $default;
}
/**
* 设置获取当前页码闭包
* @param Closure $resolver
*/
public static function currentPageResolver(Closure $resolver)
{
static::$currentPageResolver = $resolver;
}
/**
* 自动获取当前的path
* @access public
* @param string $default
* @return string
*/
public static function getCurrentPath($default = '/'): string
{
if (isset(static::$currentPathResolver)) {
return call_user_func(static::$currentPathResolver);
}
return $default;
}
/**
* 设置获取当前路径闭包
* @param Closure $resolver
*/
public static function currentPathResolver(Closure $resolver)
{
static::$currentPathResolver = $resolver;
}
/**
* 获取数据总条数
* @return int
*/
public function total(): int
{
if ($this->simple) {
throw new DomainException('not support total');
}
return $this->total;
}
/**
* 获取每页数量
* @return int
*/
public function listRows(): int
{
return $this->listRows;
}
/**
* 获取当前页页码
* @return int
*/
public function currentPage(): int
{
return $this->currentPage;
}
/**
* 获取最后一页页码
* @return int
*/
public function lastPage(): int
{
if ($this->simple) {
throw new DomainException('not support last');
}
return $this->lastPage;
}
/**
* 数据是否足够分页
* @access public
* @return bool
*/
public function hasPages(): bool
{
return !(1 == $this->currentPage && !$this->hasMore);
}
/**
* 创建一组分页链接
*
* @access public
* @param int $start
* @param int $end
* @return array
*/
public function getUrlRange(int $start, int $end): array
{
$urls = [];
for ($page = $start; $page <= $end; $page++) {
$urls[$page] = $this->url($page);
}
return $urls;
}
/**
* 设置URL锚点
*
* @access public
* @param string|null $fragment
* @return $this
*/
public function fragment(string $fragment = null)
{
$this->options['fragment'] = $fragment;
return $this;
}
/**
* 添加URL参数
*
* @access public
* @param array $append
* @return $this
*/
public function appends(array $append)
{
foreach ($append as $k => $v) {
if ($k !== $this->options['var_page']) {
$this->options['query'][$k] = $v;
}
}
return $this;
}
/**
* 构造锚点字符串
*
* @access public
* @return string
*/
protected function buildFragment(): string
{
return $this->options['fragment'] ? '#' . $this->options['fragment'] : '';
}
/**
* 渲染分页html
* @access public
* @return mixed
*/
abstract public function render();
public function items()
{
return $this->items->all();
}
/**
* 获取数据集
*
* @return Collection|\think\model\Collection
*/
public function getCollection()
{
return $this->items;
}
public function isEmpty(): bool
{
return $this->items->isEmpty();
}
/**
* 给每个元素执行个回调
*
* @access public
* @param callable $callback
* @return $this
*/
public function each(callable $callback)
{
foreach ($this->items as $key => $item) {
$result = $callback($item, $key);
if (false === $result) {
break;
} elseif (!is_object($item)) {
$this->items[$key] = $result;
}
}
return $this;
}
/**
* Retrieve an external iterator
* @access public
* @return Traversable An instance of an object implementing <b>Iterator</b> or
* <b>Traversable</b>
*/
#[\ReturnTypeWillChange]
public function getIterator(): Traversable
{
return new ArrayIterator($this->items->all());
}
/**
* Whether a offset exists
* @access public
* @param mixed $offset
* @return bool
*/
#[\ReturnTypeWillChange]
public function offsetExists($offset): bool
{
return $this->items->offsetExists($offset);
}
/**
* Offset to retrieve
* @access public
* @param mixed $offset
* @return mixed
*/
#[\ReturnTypeWillChange]
public function offsetGet($offset)
{
return $this->items->offsetGet($offset);
}
/**
* Offset to set
* @access public
* @param mixed $offset
* @param mixed $value
*/
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
$this->items->offsetSet($offset, $value);
}
/**
* Offset to unset
* @access public
* @param mixed $offset
* @return void
* @since 5.0.0
*/
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
$this->items->offsetUnset($offset);
}
/**
* 统计数据集条数
* @return int
*/
public function count(): int
{
return $this->items->count();
}
public function __toString()
{
return (string) $this->render();
}
/**
* 转换为数组
* @return array
*/
public function toArray(): array
{
try {
$total = $this->total();
} catch (DomainException $e) {
$total = null;
}
return [
'total' => $total,
'per_page' => $this->listRows(),
'current_page' => $this->currentPage(),
'last_page' => $this->lastPage,
'data' => $this->items->toArray(),
];
}
/**
* Specify data which should be serialized to JSON
*/
#[\ReturnTypeWillChange]
public function jsonSerialize()
{
return $this->toArray();
}
public function __call($name, $arguments)
{
$result = call_user_func_array([$this->items, $name], $arguments);
if ($result instanceof Collection) {
$this->items = $result;
return $this;
}
return $result;
}
}