mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
b6017a7c90
This fixes FirstLast and EvenOdd in templates, and makes ArrayList more consistent, as several methods already discarded the keys.
575 lines
14 KiB
PHP
575 lines
14 KiB
PHP
<?php
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/**
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* A list object that wraps around an array of objects or arrays.
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*
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* @package framework
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* @subpackage model
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*/
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class ArrayList extends ViewableData implements SS_List, SS_Filterable, SS_Sortable, SS_Limitable {
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/**
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* Holds the items in the list
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*
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* @var array
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*/
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protected $items;
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/**
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*
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* @param array $items - an initial array to fill this object with
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*/
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public function __construct(array $items = array()) {
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$this->items = array_values($items);
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parent::__construct();
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}
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/**
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* Return the class of items in this list, by looking at the first item inside it.
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*/
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public function dataClass() {
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if(count($this->items) > 0) return get_class($this->items[0]);
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}
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/**
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* Return the number of items in this list
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*
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* @return int
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*/
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public function count() {
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return count($this->items);
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}
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/**
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* Returns true if this list has items
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*
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* @return bool
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*/
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public function exists() {
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return (bool) count($this);
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}
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/**
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* Returns an Iterator for this ArrayList.
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* This function allows you to use ArrayList in foreach loops
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*
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* @return ArrayIterator
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*/
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public function getIterator() {
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return new ArrayIterator($this->items);
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}
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/**
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* Return an array of the actual items that this ArrayList contains.
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*
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* @return array
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*/
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public function toArray() {
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return $this->items;
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}
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public function debug() {
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$val = "<h2>" . $this->class . "</h2><ul>";
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foreach($this->toNestedArray() as $item) {
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$val .= "<li style=\"list-style-type: disc; margin-left: 20px\">" . Debug::text($item) . "</li>";
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}
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$val .= "</ul>";
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return $val;
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}
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/**
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* Return this list as an array and every object it as an sub array as well
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*
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* @return array
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*/
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public function toNestedArray() {
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$result = array();
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foreach ($this->items as $item) {
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if (is_object($item)) {
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if (method_exists($item, 'toMap')) {
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$result[] = $item->toMap();
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} else {
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$result[] = (array) $item;
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}
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} else {
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$result[] = $item;
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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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* Get a sub-range of this dataobjectset as an array
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*
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* @param int $offset
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* @param int $length
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* @return ArrayList
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*/
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public function getRange($offset, $length) {
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Deprecation::notice("3.0", 'getRange($offset, $length) is deprecated. Use limit($length, $offset) instead.'
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. ' Note the new argument order.');
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return $this->limit($length, $offset);
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}
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/**
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* Get a sub-range of this dataobjectset as an array
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*
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* @param int $offset
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* @param int $length
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* @return ArrayList
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*/
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public function limit($length, $offset = 0) {
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return new ArrayList(array_slice($this->items, $offset, $length));
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}
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/**
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* Add this $item into this list
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*
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* @param mixed $item
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*/
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public function add($item) {
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$this->push($item);
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}
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/**
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* Remove this item from this list
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*
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* @param mixed $item
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*/
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public function remove($item) {
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$renumberKeys = false;
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foreach ($this->items as $key => $value) {
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if ($item === $value) {
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$renumberKeys = true;
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unset($this->items[$key]);
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}
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}
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if($renumberKeys) $this->items = array_values($this->items);
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}
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/**
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* Replaces an item in this list with another item.
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*
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* @param array|object $item
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* @param array|object $with
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* @return void;
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*/
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public function replace($item, $with) {
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foreach ($this->items as $key => $candidate) {
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if ($candidate === $item) {
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$this->items[$key] = $with;
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return;
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}
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}
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}
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/**
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* Merges with another array or list by pushing all the items in it onto the
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* end of this list.
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*
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* @param array|object $with
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*/
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public function merge($with) {
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foreach ($with as $item) $this->push($item);
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}
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/**
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* Removes items from this list which have a duplicate value for a certain
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* field. This is especially useful when combining lists.
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*
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* @param string $field
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*/
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public function removeDuplicates($field = 'ID') {
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$seen = array();
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$renumberKeys = false;
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foreach ($this->items as $key => $item) {
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$value = $this->extractValue($item, $field);
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if (array_key_exists($value, $seen)) {
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$renumberKeys = true;
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unset($this->items[$key]);
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}
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$seen[$value] = true;
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}
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if($renumberKeys) $this->items = array_values($this->items);
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}
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/**
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* Pushes an item onto the end of this list.
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*
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* @param array|object $item
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*/
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public function push($item) {
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$this->items[] = $item;
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}
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/**
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* Pops the last element off the end of the list and returns it.
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*
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* @return array|object
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*/
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public function pop() {
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return array_pop($this->items);
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}
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/**
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* Add an item onto the beginning of the list.
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*
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* @param array|object $item
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*/
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public function unshift($item) {
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array_unshift($this->items, $item);
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}
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/**
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* Shifts the item off the beginning of the list and returns it.
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*
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* @return array|object
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*/
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public function shift() {
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return array_shift($this->items);
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}
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/**
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* Returns the first item in the list
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*
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* @return mixed
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*/
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public function first() {
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return reset($this->items);
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}
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/**
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* Returns the last item in the list
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*
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* @return mixed
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*/
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public function last() {
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return end($this->items);
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}
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/**
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* Returns a map of this list
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*
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* @param type $keyfield - the 'key' field of the result array
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* @param type $titlefield - the value field of the result array
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* @return array
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*/
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public function map($keyfield = 'ID', $titlefield = 'Title') {
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$map = array();
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foreach ($this->items as $item) {
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$map[$this->extractValue($item, $keyfield)] = $this->extractValue($item, $titlefield);
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}
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return $map;
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}
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/**
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* Find the first item of this list where the given key = value
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*
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* @param type $key
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* @param type $value
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* @return type
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*/
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public function find($key, $value) {
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foreach ($this->items as $item) {
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if ($this->extractValue($item, $key) == $value) return $item;
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}
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}
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/**
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* Returns an array of a single field value for all items in the list.
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*
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* @param string $colName
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* @return array
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*/
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public function column($colName = 'ID') {
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$result = array();
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foreach ($this->items as $item) {
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$result[] = $this->extractValue($item, $colName);
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}
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return $result;
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}
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/**
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* You can always sort a ArrayList
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*
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* @param string $by
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* @return bool
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*/
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public function canSortBy($by) {
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return true;
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}
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/**
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* Reverses an {@link ArrayList}
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*
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* @return ArrayList
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*/
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public function reverse() {
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// TODO 3.1: This currently mutates existing array
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$list = /* clone */ $this;
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$list->items = array_reverse($this->items);
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return $list;
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}
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/**
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* Sorts this list by one or more fields. You can either pass in a single
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* field name and direction, or a map of field names to sort directions.
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*
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* @return DataList
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* @see SS_List::sort()
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* @example $list->sort('Name'); // default ASC sorting
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* @example $list->sort('Name DESC'); // DESC sorting
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* @example $list->sort('Name', 'ASC');
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* @example $list->sort(array('Name'=>'ASC,'Age'=>'DESC'));
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*/
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public function sort() {
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$args = func_get_args();
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if(count($args)==0){
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return $this;
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}
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if(count($args)>2){
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throw new InvalidArgumentException('This method takes zero, one or two arguments');
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}
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// One argument and it's a string
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if(count($args)==1 && is_string($args[0])){
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$column = $args[0];
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if(strpos($column, ' ') !== false) {
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throw new InvalidArgumentException("You can't pass SQL fragments to sort()");
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}
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$columnsToSort[$column] = SORT_ASC;
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} else if(count($args)==2){
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$columnsToSort[$args[0]]=(strtolower($args[1])=='desc')?SORT_DESC:SORT_ASC;
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} else if(is_array($args[0])) {
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foreach($args[0] as $column => $sort_order){
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$columnsToSort[$column] = (strtolower($sort_order)=='desc')?SORT_DESC:SORT_ASC;
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}
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} else {
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throw new InvalidArgumentException("Bad arguments passed to sort()");
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}
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// This the main sorting algorithm that supports infinite sorting params
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$multisortArgs = array();
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$values = array();
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foreach($columnsToSort as $column => $direction ) {
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// The reason these are added to columns is of the references, otherwise when the foreach
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// is done, all $values and $direction look the same
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$values[$column] = array();
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$sortDirection[$column] = $direction;
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// We need to subtract every value into a temporary array for sorting
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foreach($this->items as $index => $item) {
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$values[$column][] = $this->extractValue($item, $column);
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}
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// PHP 5.3 requires below arguments to be reference when using array_multisort together
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// with call_user_func_array
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// First argument is the 'value' array to be sorted
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$multisortArgs[] = &$values[$column];
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// First argument is the direction to be sorted,
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$multisortArgs[] = &$sortDirection[$column];
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}
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// TODO 3.1: This currently mutates existing array
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$list = /* clone */ $this;
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// As the last argument we pass in a reference to the items that all the sorting will be applied upon
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$multisortArgs[] = &$list->items;
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call_user_func_array('array_multisort', $multisortArgs);
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return $list;
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}
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/**
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* Returns true if the given column can be used to filter the records.
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*
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* It works by checking the fields available in the first record of the list.
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*/
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public function canFilterBy($by) {
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return array_key_exists($by, $this->first());
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}
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/**
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* Filter the list to include items with these charactaristics
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*
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* @return ArrayList
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* @see SS_List::filter()
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* @example $list->filter('Name', 'bob'); // only bob in the list
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* @example $list->filter('Name', array('aziz', 'bob'); // aziz and bob in list
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* @example $list->filter(array('Name'=>'bob, 'Age'=>21)); // bob with the Age 21 in list
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* @example $list->filter(array('Name'=>'bob, 'Age'=>array(21, 43))); // bob with the Age 21 or 43
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* @example $list->filter(array('Name'=>array('aziz','bob'), 'Age'=>array(21, 43)));
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* // aziz with the age 21 or 43 and bob with the Age 21 or 43
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*/
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public function filter() {
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if(count(func_get_args())>2){
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throw new InvalidArgumentException('filter takes one array or two arguments');
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}
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if(count(func_get_args()) == 1 && !is_array(func_get_arg(0))){
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throw new InvalidArgumentException('filter takes one array or two arguments');
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}
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$keepUs = array();
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if(count(func_get_args())==2){
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$keepUs[func_get_arg(0)] = func_get_arg(1);
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}
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if(count(func_get_args())==1 && is_array(func_get_arg(0))){
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foreach(func_get_arg(0) as $column => $value) {
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$keepUs[$column] = $value;
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}
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}
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$itemsToKeep = array();
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foreach($this->items as $item){
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$keepItem = true;
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foreach($keepUs as $column => $value ) {
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if(is_array($value) && !in_array($this->extractValue($item, $column), $value)) {
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$keepItem = false;
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} elseif(!is_array($value) && $this->extractValue($item, $column) != $value) {
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$keepItem = false;
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}
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}
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if($keepItem) {
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$itemsToKeep[] = $item;
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}
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}
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// TODO 3.1: This currently mutates existing array
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$list = /* clone */ $this;
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$list->items = $itemsToKeep;
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return $list;
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}
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public function byID($id) {
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return $this->filter("ID", $id)->First();
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}
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/**
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* Exclude the list to not contain items with these charactaristics
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*
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* @return ArrayList
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* @see SS_List::exclude()
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* @example $list->exclude('Name', 'bob'); // exclude bob from list
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* @example $list->exclude('Name', array('aziz', 'bob'); // exclude aziz and bob from list
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* @example $list->exclude(array('Name'=>'bob, 'Age'=>21)); // exclude bob that has Age 21
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* @example $list->exclude(array('Name'=>'bob, 'Age'=>array(21, 43))); // exclude bob with Age 21 or 43
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* @example $list->exclude(array('Name'=>array('bob','phil'), 'Age'=>array(21, 43)));
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* // bob age 21 or 43, phil age 21 or 43 would be excluded
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*/
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public function exclude() {
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if(count(func_get_args())>2){
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throw new InvalidArgumentException('exclude() takes one array or two arguments');
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}
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if(count(func_get_args()) == 1 && !is_array(func_get_arg(0))){
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throw new InvalidArgumentException('exclude() takes one array or two arguments');
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}
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$removeUs = array();
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if(count(func_get_args())==2){
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$removeUs[func_get_arg(0)] = func_get_arg(1);
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}
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if(count(func_get_args())==1 && is_array(func_get_arg(0))){
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foreach(func_get_arg(0) as $column => $excludeValue) {
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$removeUs[$column] = $excludeValue;
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}
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}
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$hitsRequiredToRemove = count($removeUs);
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$matches = array();
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foreach($removeUs as $column => $excludeValue) {
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foreach($this->items as $key => $item){
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if(!is_array($excludeValue) && $this->extractValue($item, $column) == $excludeValue) {
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$matches[$key]=isset($matches[$key])?$matches[$key]+1:1;
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} elseif(is_array($excludeValue) && in_array($this->extractValue($item, $column), $excludeValue)) {
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$matches[$key]=isset($matches[$key])?$matches[$key]+1:1;
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}
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}
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}
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$keysToRemove = array_keys($matches,$hitsRequiredToRemove);
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$itemsToKeep = array();
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foreach($this->items as $key => $value) {
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if(!in_array($key, $keysToRemove)) {
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$itemsToKeep[] = $value;
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}
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}
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// TODO 3.1: This currently mutates existing array
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$list = /* clone */ $this;
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$list->items = $itemsToKeep;
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return $list;
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}
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protected function shouldExclude($item, $args) {
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}
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/**
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* Returns whether an item with $key exists
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*
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* @param mixed $key
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* @return bool
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*/
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public function offsetExists($offset) {
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return array_key_exists($offset, $this->items);
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}
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/**
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* Returns item stored in list with index $key
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*
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* @param mixed $key
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* @return DataObject
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*/
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public function offsetGet($offset) {
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if ($this->offsetExists($offset)) return $this->items[$offset];
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}
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/**
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* Set an item with the key in $key
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*
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* @param mixed $key
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* @param mixed $value
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*/
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public function offsetSet($offset, $value) {
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$this->items[$offset] = $value;
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}
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/**
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* Unset an item with the key in $key
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*
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* @param mixed $key
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*/
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public function offsetUnset($offset) {
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unset($this->items[$offset]);
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}
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/**
|
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* Extracts a value from an item in the list, where the item is either an
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* object or array.
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*
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* @param array|object $item
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* @param string $key
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* @return mixed
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|
*/
|
|
protected function extractValue($item, $key) {
|
|
if (is_object($item)) {
|
|
return $item->$key;
|
|
} else {
|
|
if (array_key_exists($key, $item)) return $item[$key];
|
|
}
|
|
}
|
|
|
|
}
|