README

Provides interfaces that allow to search repositories implemented in our libraries in a standardized way.

It defines the following interfaces:

DigitalBackstage\Searchable\Paginable

This one defines the interface for what a Searchable repository should return when queried. It should be immutable, provide a subset of all available items, and pagination information, namely:

• the number of the current page;
• the number of the last page;
• the number of items per page;
• the number of available items.

Page numbers start from 1. It extends \Traversable, but not \Countable, because that would be very confusing: should it return the number of page? Of available items? Of items in the current page?

DigitalBackstage\Searchable\SearchQuery

Searchable repositories are queried with this object. It consists in an expression, which should be translated to DQL, SQL or JSON by the repository, and should provide information about the desired page number and page size.

DigitalBackstage\Searchable\QueryExpression

This represents an expression, and has several implementations. Repositories should list which implementations they support.

DigitalBackstage\Searchable\SortedSearchQuery

If the client wants to specify a sort order other than the default one, it must implement SortedSearchQuery.

DigitalBackstage\Searchable\Searchable

A repository of objects. Must be queried with a SearchQuery, and must return a Paginable. Must advertise what fields it supports for querying. Should throw PageOutOfRange, and UnsupportedSearchField when appropriate.