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<?php /** * This file is part of the ramsey/collection library * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. * * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com> * @license http://opensource.org/licenses/MIT MIT */ declare(strict_types=1); namespace Ramsey\Collection; /** * A collection represents a group of objects, known as its elements. * * Some collections allow duplicate elements and others do not. Some are ordered * and others unordered. * * @template T * @extends ArrayInterface<T> */ interface CollectionInterface extends ArrayInterface { /** * Ascending sort type. */ public const SORT_ASC = 'asc'; /** * Descending sort type. */ public const SORT_DESC = 'desc'; /** * Ensures that this collection contains the specified element (optional * operation). * * Returns `true` if this collection changed as a result of the call. * (Returns `false` if this collection does not permit duplicates and * already contains the specified element.) * * Collections that support this operation may place limitations on what * elements may be added to this collection. In particular, some * collections will refuse to add `null` elements, and others will impose * restrictions on the type of elements that may be added. Collection * classes should clearly specify in their documentation any restrictions * on what elements may be added. * * If a collection refuses to add a particular element for any reason other * than that it already contains the element, it must throw an exception * (rather than returning `false`). This preserves the invariant that a * collection always contains the specified element after this call returns. * * @param T $element The element to add to the collection. * * @return bool `true` if this collection changed as a result of the call. */ // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint public function add($element): bool; /** * Returns `true` if this collection contains the specified element. * * @param T $element The element to check whether the collection contains. * @param bool $strict Whether to perform a strict type check on the value. */ // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint public function contains($element, bool $strict = true): bool; /** * Returns the type associated with this collection. */ public function getType(): string; /** * Removes a single instance of the specified element from this collection, * if it is present. * * @param T $element The element to remove from the collection. * * @return bool `true` if an element was removed as a result of this call. */ // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint public function remove($element): bool; /** * Returns the values from the given property or method. * * @param string $propertyOrMethod The property or method name to filter by. * * @return list<mixed> */ public function column(string $propertyOrMethod): array; /** * Returns the first item of the collection. * * @return T */ public function first(); /** * Returns the last item of the collection. * * @return T */ public function last(); /** * Sort the collection by a property or method with the given sort order. * * This will always leave the original collection untouched and will return * a new one. * * @param string $propertyOrMethod The property or method to sort by. * @param string $order The sort order for the resulting collection (one of * this interface's `SORT_*` constants). * * @return CollectionInterface<T> */ public function sort(string $propertyOrMethod, string $order = self::SORT_ASC): self; /** * Filter out items of the collection which don't match the criteria of * given callback. * * This will always leave the original collection untouched and will return * a new one. * * See the {@link http://php.net/manual/en/function.array-filter.php PHP array_filter() documentation} * for examples of how the `$callback` parameter works. * * @param callable(T):bool $callback A callable to use for filtering elements. * * @return CollectionInterface<T> */ public function filter(callable $callback): self; /** * Create a new collection where items match the criteria of given callback. * * This will always leave the original collection untouched and will return * a new one. * * @param string $propertyOrMethod The property or method to evaluate. * @param mixed $value The value to match. * * @return CollectionInterface<T> */ // phpcs:ignore SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint public function where(string $propertyOrMethod, $value): self; /** * Apply a given callback method on each item of the collection. * * This will always leave the original collection untouched. The new * collection is created by mapping the callback to each item of the * original collection. * * See the {@link http://php.net/manual/en/function.array-map.php PHP array_map() documentation} * for examples of how the `$callback` parameter works. * * @param callable(T):TCallbackReturn $callback A callable to apply to each * item of the collection. * * @return CollectionInterface<TCallbackReturn> * * @template TCallbackReturn */ public function map(callable $callback): self; /** * Create a new collection with divergent items between current and given * collection. * * @param CollectionInterface<T> $other The collection to check for divergent * items. * * @return CollectionInterface<T> */ public function diff(CollectionInterface $other): self; /** * Create a new collection with intersecting item between current and given * collection. * * @param CollectionInterface<T> $other The collection to check for * intersecting items. * * @return CollectionInterface<T> */ public function intersect(CollectionInterface $other): self; /** * Merge current items and items of given collections into a new one. * * @param CollectionInterface<T> ...$collections The collections to merge. * * @return CollectionInterface<T> */ public function merge(CollectionInterface ...$collections): self; }