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Commit4aedcff

Browse files
author
Dominik Liebler
committed
Merge pull requestDesignPatternsPHP#71 from andrewnester/master
Repository pattern
2 parentsabd2b8e +19ff5e6 commit4aedcff

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5 files changed

+304
-0
lines changed

5 files changed

+304
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‎Repository/MemoryStorage.php

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<?php
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namespaceDesignPatterns\Repository;
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/**
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* Class MemoryStorage
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* @package DesignPatterns\Repository
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*/
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class MemoryStorageimplements Storage
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{
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private$data;
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private$lastId;
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publicfunction__construct()
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{
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$this->data =array();
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$this->lastId =0;
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}
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/**
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* {@inheritdoc}
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*/
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publicfunctionpersist($data)
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{
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$this->data[++$this->lastId] =$data;
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return$this->lastId;
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}
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/**
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* {@inheritdoc}
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*/
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publicfunctionretrieve($id)
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{
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returnisset($this->data[$id]) ?$this->data[$id] :null;
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}
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/**
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* {@inheritdoc}
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*/
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publicfunctiondelete($id)
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{
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if(!isset($this->data[$id])){
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returnfalse;
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}
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$this->data[$id] =null;
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unset($this->data[$id]);
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returntrue;
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}
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}
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‎Repository/Post.php

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<?php
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namespaceDesignPatterns\Repository;
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/**
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* Post represents entity for some post that user left on the site
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*
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* Class Post
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* @package DesignPatterns\Repository
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*/
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class Post
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{
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/**
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* @var int
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*/
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private$id;
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/**
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* @var string
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*/
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private$title;
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/**
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* @var string
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*/
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private$text;
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/**
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* @var string
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*/
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private$author;
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/**
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* @var \DateTime
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*/
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private$created;
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/**
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* @param int $id
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*/
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publicfunctionsetId($id)
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{
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$this->id =$id;
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}
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/**
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* @return int
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*/
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publicfunctiongetId()
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{
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return$this->id;
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}
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/**
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* @param string $author
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*/
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publicfunctionsetAuthor($author)
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{
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$this->author =$author;
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}
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/**
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* @return string
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*/
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publicfunctiongetAuthor()
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{
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return$this->author;
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}
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/**
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* @param \DateTime $created
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*/
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publicfunctionsetCreated($created)
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{
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$this->created =$created;
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}
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/**
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* @return \DateTime
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*/
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publicfunctiongetCreated()
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{
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return$this->created;
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}
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/**
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* @param string $text
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*/
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publicfunctionsetText($text)
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{
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$this->text =$text;
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}
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/**
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* @return string
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*/
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publicfunctiongetText()
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{
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return$this->text;
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}
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/**
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* @param string $title
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*/
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publicfunctionsetTitle($title)
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{
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$this->title =$title;
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}
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/**
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* @return string
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*/
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publicfunctiongetTitle()
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{
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return$this->title;
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}
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}

‎Repository/PostRepository.php

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<?php
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namespaceDesignPatterns\Repository;
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/**
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* Repository for class Post
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* This class is between Entity layer(class Post) and access object layer(interface Storage)
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* Repository encapsulates the set of objects persisted in a data store and the operations performed over them, providing a more object-oriented view of the persistence layer
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* Repository also supports the objective of achieving a clean separation and one-way dependency between the domain and data mapping layers
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*
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* Class PostRepository
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* @package DesignPatterns\Repository
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*/
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class PostRepository
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{
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private$persistence;
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publicfunction__construct(Storage$persistence)
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{
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$this->persistence =$persistence;
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}
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/**
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* Returns Post object by specified id
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*
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* @param int $id
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* @return Post|null
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*/
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publicfunctiongetById($id)
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{
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$arrayData =$this->persistence->retrieve($id);
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if(is_null($arrayData)){
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returnnull;
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}
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$post =newPost();
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$post->setId($arrayData['id']);
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$post->setAuthor($arrayData['author']);
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$post->setCreated($arrayData['created']);
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$post->setText($arrayData['text']);
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$post->setTitle($arrayData['title']);
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return$post;
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}
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/**
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* Save post object and populate it with id
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*
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* @param Post $post
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* @return Post
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*/
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publicfunctionsave(Post$post)
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{
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$id =$this->persistence->persist(array(
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'author' =>$post->getAuthor(),
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'created' =>$post->getCreated(),
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'text' =>$post->getText(),
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'title' =>$post->getTitle()
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));
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$post->setId($id);
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return$post;
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}
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/**
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* Deletes specified Post object
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*
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* @param Post $post
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* @return bool
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*/
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publicfunctiondelete(Post$post)
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{
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return$this->persistence->delete($post->getId());
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}
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}

‎Repository/README.md

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#Repository
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##Purpose
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Mediates between the domain and data mapping layers using a collection-like interface for accessing domain objects.
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Repository encapsulates the set of objects persisted in a data store and the operations performed over them, providing a more object-oriented view of the persistence layer.
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Repository also supports the objective of achieving a clean separation and one-way dependency between the domain and data mapping layers.
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##Examples
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* Doctrine 2 ORM: there is Repository that mediates between Entity and DBAL and contains methods to retrieve objects
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* Laravel Framework

‎Repository/Storage.php

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<?php
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namespaceDesignPatterns\Repository;
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/**
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* Interface Storage
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*
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* This interface describes methods for accessing storage.
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* Concrete realization could be whatever we want - in memory, relational database, NoSQL database and etc
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*
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* @package DesignPatterns\Repository
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*/
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interface Storage
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{
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/**
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* Method to persist data
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* Returns new id for just persisted data
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*
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* @param array() $data
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* @return int
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*/
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publicfunctionpersist($data);
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/**
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* Returns data by specified id.
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* If there is no such data null is returned
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*
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* @param int $id
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* @return array|null
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*/
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publicfunctionretrieve($id);
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/**
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* Delete data specified by id
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* If there is no such data - false returns, if data has been successfully deleted - true returns
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*
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* @param int $id
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* @return bool
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*/
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publicfunctiondelete($id);
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}

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