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<?php |
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namespace lroman242\LaravelCassandra; |
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use \Cassandra\Rows; |
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use lroman242\LaravelCassandra\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Collection as BaseCollection; |
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class Collection extends BaseCollection |
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{ |
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/** |
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* Cassandra rows instance |
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* |
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* @var \Cassandra\Rows |
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*/ |
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private $rows; |
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/** |
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* Set Cassandra rows instance related to the |
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* collection items. |
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* |
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* Required for fetching next pages |
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* |
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* @param Rows $rows |
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* |
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* @return $this |
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*/ |
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public function setRowsInstance(Rows $rows) |
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{ |
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$this->rows = $rows; |
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return $this; |
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} |
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/** |
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* Next page token |
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* |
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* @return mixed |
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*/ |
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public function getNextPageToken() |
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{ |
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if ($this->rows === null) { |
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return null; |
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} |
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return $this->rows->pagingStateToken(); |
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} |
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/** |
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* Last page indicator |
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* @return bool |
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*/ |
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public function isLastPage() |
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{ |
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if ($this->rows === null) { |
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return true; |
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} |
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return $this->rows->isLastPage(); |
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} |
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/** |
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* Get next page |
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* |
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* @return Collection |
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*/ |
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public function nextPage() |
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{ |
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if ($this->rows !== null && !$this->isLastPage()) { |
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/** @var Model $instance */ |
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$model = $this->first(); |
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$nextPageRows = $this->rows->nextPage(); |
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$nextPageCollection = $model->newCassandraCollection($nextPageRows); |
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return $nextPageCollection; |
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} |
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return new self; |
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} |
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/** |
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* Get rows instance |
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* |
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* @return \Cassandra\Rows |
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*/ |
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public function getRows() |
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{ |
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return $this->rows; |
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} |
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/** |
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* Update current collection with results from |
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* the next page |
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* |
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* @return Collection |
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*/ |
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public function appendNextPage() |
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{ |
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$nextPage = $this->nextPage(); |
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if (!$nextPage->isEmpty()) { |
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$this->items = array_merge($this->items, $nextPage->toArray()); |
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$this->rows = $nextPage->getRows(); |
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} |
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return $this; |
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} |
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/** |
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* Merge the collection with the given items. |
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* |
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* @param \ArrayAccess|array $items |
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* @return static |
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*/ |
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public function merge($items) |
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{ |
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$dictionary = $this->getDictionary(); |
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foreach ($items as $item) { |
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$dictionary[(string) $item->getKey()] = $item; |
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} |
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return new static(array_values($dictionary)); |
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} |
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/** |
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* Reload a fresh model instance from the database for all the entities. |
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* |
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* @param array|string $with |
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* @return static |
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*/ |
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public function fresh($with = []) |
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{ |
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if ($this->isEmpty()) { |
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return new static([]); |
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} |
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$model = $this->first(); |
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$freshModels = $model->newQueryWithoutScopes() |
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->whereIn($model->getKeyName(), $this->modelKeys()) |
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->get() |
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->getDictionary(); |
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return $this->map(function ($model) use ($freshModels) { |
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if ($model->exists && isset($freshModels[$model->getKey()])) { |
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return $freshModels[$model->getKey()]; |
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} else { |
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return null; |
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} |
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}); |
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} |
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} |
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lroman242 /
laravel-cassandra
