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<?php namespace Illuminate\Database\Eloquent;
use Illuminate\Support\Collection as BaseCollection;
class Collection extends BaseCollection {
/**
* Find a model in the collection by key.
*
* @param mixed $key
* @param mixed $default
* @return \Illuminate\Database\Eloquent\Model
*/
public function find($key, $default = null)
{
if ($key instanceof Model)
{
$key = $key->getKey();
}
return array_first($this->items, function($itemKey, $model) use ($key)
{
return $model->getKey() == $key;
}, $default);
}
/**
* Load a set of relationships onto the collection.
*
* @param dynamic $relations
* @return \Illuminate\Database\Eloquent\Collection
*/
public function load($relations)
{
if (count($this->items) > 0)
{
if (is_string($relations)) $relations = func_get_args();
$query = $this->first()->newQuery()->with($relations);
$this->items = $query->eagerLoadRelations($this->items);
}
return $this;
}
/**
* Add an item to the collection.
*
* @param mixed $item
* @return \Illuminate\Database\Eloquent\Collection
*/
public function add($item)
{
$this->items[] = $item;
return $this;
}
/**
* Determine if a key exists in the collection.
*
* @param mixed $key
* @return bool
*/
public function contains($key)
{
return ! is_null($this->find($key));
}
/**
* Fetch a nested element of the collection.
*
* @param string $key
* @return \Illuminate\Support\Collection
*/
public function fetch($key)
{
return new static(array_fetch($this->toArray(), $key));
}
/**
* Get the max value of a given key.
*
* @param string $key
* @return mixed
*/
public function max($key)
{
return $this->reduce(function($result, $item) use ($key)
{
return (is_null($result) || $item->{$key} > $result) ? $item->{$key} : $result;
});
}
/**
* Get the min value of a given key.
*
* @param string $key
* @return mixed
*/
public function min($key)
{
return $this->reduce(function($result, $item) use ($key)
{
return (is_null($result) || $item->{$key} < $result) ? $item->{$key} : $result;
});
}
/**
* Get the array of primary keys
*
* @return array
*/
public function modelKeys()
{
return array_map(function($m) { return $m->getKey(); }, $this->items);
}
/**
* Merge the collection with the given items.
*
* @param \Illuminate\Support\Collection|\Illuminate\Support\Contracts\ArrayableInterface|array $items
* @return \Illuminate\Support\Collection
*/
public function merge($collection)
{
$dictionary = $this->getDictionary();
foreach ($collection as $item)
{
$dictionary[$item->getKey()] = $item;
}
return new static(array_values($dictionary));
}
/**
* Diff the collection with the given items.
*
* @param \Illuminate\Support\Collection|\Illuminate\Support\Contracts\ArrayableInterface|array $items
* @return \Illuminate\Support\Collection
*/
public function diff($collection)
{
$diff = new static;
$dictionary = $this->getDictionary($collection);
foreach ($this->items as $item)
{
if ( ! isset($dictionary[$item->getKey()]))
{
$diff->add($item);
}
}
return $diff;
}
/**
* Intersect the collection with the given items.
*
* @param \Illuminate\Support\Collection|\Illuminate\Support\Contracts\ArrayableInterface|array $items
* @return \Illuminate\Support\Collection
*/
public function intersect($collection)
{
$intersect = new static;
$dictionary = $this->getDictionary($collection);
foreach ($this->items as $item)
{
if (isset($dictionary[$item->getKey()]))
{
$intersect->add($item);
}
}
return $intersect;
}
/**
* Return only unique items from the collection.
*
* @return \Illuminate\Support\Collection
*/
public function unique()
{
$dictionary = $this->getDictionary();
return new static(array_values($dictionary));
}
/**
* Returns only the models from the collection with the specified keys.
*
* @param mixed $keys
* @return \Illuminate\Support\Collection
*/
public function only($keys)
{
$dictionary = array_only($this->getDictionary($this), $keys);
return new static(array_values($dictionary));
}
/**
* Returns all models in the collection except the models with specified keys.
*
* @param mixed $keys
* @return \Illuminate\Support\Collection
*/
public function except($keys)
{
$dictionary = array_except($this->getDictionary($this), $keys);
return new static(array_values($dictionary));
}
/**
* Get a dictionary keyed by primary keys.
*
* @param \Illuminate\Support\Collection $collection
* @return array
*/
public function getDictionary($collection = null)
{
$collection = $collection ?: $this;
$dictionary = array();
foreach ($collection as $value)
{
$dictionary[$value->getKey()] = $value;
}
return $dictionary;
}
/**
* Get a base Support collection instance from this collection.
*
* @return \Illuminate\Support\Collection
*/
public function toBase()
{
return new BaseCollection($this->items);
}
}
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