<?php<448901948@qq.com>
namespace think;
use ArrayAccess;
use ArrayIterator;
use Countable;
use IteratorAggregate;
use JsonSerializable;
class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
{
protected $items = [];
public function __construct($items = [])
{
$this->items = $this->convertToArray($items);
}
public static function make($items = [])
{
return new static($items);
}
public function isEmpty()
{
return empty($this->items);
}
public function toArray()
{
return array_map(function ($value) {
return ($value instanceof Model || $value instanceof self) ? $value->toArray() : $value;
}, $this->items);
}
public function all()
{
return $this->items;
}
public function merge($items)
{
return new static(array_merge($this->items, $this->convertToArray($items)));
}
public function flip()
{
return new static(array_flip($this->items));
}
public function dictionary($items = null, &$indexKey = null)
{
if ($items instanceof self || $items instanceof Paginator) {
$items = $items->all();
}
$items = is_null($items) ? $this->items : $items;
if ($items && empty($indexKey)) {
$indexKey = is_array($items[0]) ? 'id' : $items[0]->getPk();
}
if (isset($indexKey) && is_string($indexKey)) {
return array_column($items, null, $indexKey);
}
return $items;
}
public function diff($items, $indexKey = null)
{
if ($this->isEmpty() || is_scalar($this->items[0])) {
return new static(array_diff($this->items, $this->convertToArray($items)));
}
$diff = [];
$dictionary = $this->dictionary($items, $indexKey);
if (is_string($indexKey)) {
foreach ($this->items as $item) {
if (!isset($dictionary[$item[$indexKey]])) {
$diff[] = $item;
}
}
}
return new static($diff);
}
public function intersect($items, $indexKey = null)
{
if ($this->isEmpty() || is_scalar($this->items[0])) {
return new static(array_diff($this->items, $this->convertToArray($items)));
}
$intersect = [];
$dictionary = $this->dictionary($items, $indexKey);
if (is_string($indexKey)) {
foreach ($this->items as $item) {
if (isset($dictionary[$item[$indexKey]])) {
$intersect[] = $item;
}
}
}
return new static($intersect);
}
public function keys()
{
$current = current($this->items);
if (is_scalar($current)) {
$array = $this->items;
} elseif (is_array($current)) {
$array = $current;
} else {
$array = $current->toArray();
}
return array_keys($array);
}
public function pop()
{
return array_pop($this->items);
}
public function reduce(callable $callback, $initial = null)
{
return array_reduce($this->items, $callback, $initial);
}
public function reverse()
{
return new static(array_reverse($this->items));
}
public function shift()
{
return array_shift($this->items);
}
public function push($value, $key = null)
{
if (is_null($key)) {
$this->items[] = $value;
} else {
$this->items[$key] = $value;
}
}
public function chunk($size, $preserveKeys = false)
{
$chunks = [];
foreach (array_chunk($this->items, $size, $preserveKeys) as $chunk) {
$chunks[] = new static($chunk);
}
return new static($chunks);
}
public function unshift($value, $key = null)
{
if (is_null($key)) {
array_unshift($this->items, $value);
} else {
$this->items = [$key => $value] + $this->items;
}
}
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;
}
public function map(callable $callback)
{
return new static(array_map($callback, $this->items));
}
public function filter(callable $callback = null)
{
if ($callback) {
return new static(array_filter($this->items, $callback));
}
return new static(array_filter($this->items));
}
public function where($field, $operator, $value = null)
{
if (is_null($value)) {
$value = $operator;
$operator = '=';
}
return $this->filter(function ($data) use ($field, $operator, $value) {
if (strpos($field, '.')) {
list($field, $relation) = explode('.', $field);
$result = isset($data[$field][$relation]) ? $data[$field][$relation] : null;
} else {
$result = isset($data[$field]) ? $data[$field] : null;
}
switch (strtolower($operator)) {
case '===':
return $result === $value;
case '!==':
return $result !== $value;
case '!=':
case '<>':
return $result != $value;
case '>':
return $result > $value;
case '>=':
return $result >= $value;
case '<':
return $result < $value;
case '<=':
return $result <= $value;
case 'like':
return is_string($result) && false !== strpos($result, $value);
case 'not like':
return is_string($result) && false === strpos($result, $value);
case 'in':
return is_scalar($result) && in_array($result, $value, true);
case 'not in':
return is_scalar($result) && !in_array($result, $value, true);
case 'between':
list($min, $max) = is_string($value) ? explode(',', $value) : $value;
return is_scalar($result) && $result >= $min && $result <= $max;
case 'not between':
list($min, $max) = is_string($value) ? explode(',', $value) : $value;
return is_scalar($result) && $result > $max || $result < $min;
case '==':
case '=':
default:
return $result == $value;
}
});
}
public function column($columnKey, $indexKey = null)
{
return array_column($this->items, $columnKey, $indexKey);
}
public function sort(callable $callback = null)
{
$items = $this->items;
$callback = $callback ?: function ($a, $b) {
return $a == $b ? 0 : (($a < $b) ? -1 : 1);
};
uasort($items, $callback);
return new static($items);
}
public function order($field, $order = null, $intSort = true)
{
return $this->sort(function ($a, $b) use ($field, $order, $intSort) {
$fieldA = isset($a[$field]) ? $a[$field] : null;
$fieldB = isset($b[$field]) ? $b[$field] : null;
if ($intSort) {
return 'desc' == strtolower($order) ? $fieldB >= $fieldA : $fieldA >= $fieldB;
} else {
return 'desc' == strtolower($order) ? strcmp($fieldB, $fieldA) : strcmp($fieldA, $fieldB);
}
});
}
public function shuffle()
{
$items = $this->items;
shuffle($items);
return new static($items);
}
public function slice($offset, $length = null, $preserveKeys = false)
{
return new static(array_slice($this->items, $offset, $length, $preserveKeys));
}
public function offsetExists($offset)
{
return array_key_exists($offset, $this->items);
}
public function offsetGet($offset)
{
return $this->items[$offset];
}
public function offsetSet($offset, $value)
{
if (is_null($offset)) {
$this->items[] = $value;
} else {
$this->items[$offset] = $value;
}
}
public function offsetUnset($offset)
{
unset($this->items[$offset]);
}
public function count()
{
return count($this->items);
}
public function getIterator()
{
return new ArrayIterator($this->items);
}
public function jsonSerialize()
{
return $this->toArray();
}
public function toJson($options = JSON_UNESCAPED_UNICODE)
{
return json_encode($this->toArray(), $options);
}
public function __toString()
{
return $this->toJson();
}
protected function convertToArray($items)
{
if ($items instanceof self) {
return $items->all();
}
return (array) $items;
}
}
