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在Laravel 中使用仓库(Repository)设计模式,laravel自定义artisan命令生成Repository仓库

PHP 1833 0 创建时间：2020-07-01 07:49:06

Repository

![](http://www.seedblog.cn/uploads/article/2020-07-01/tlS7ufxaFdc8Fc7Lzo9gZlZG42HB8XkrAJ1L1LJ8.gif)
Repository 模式将业务逻辑和数据访问分离开，两者之间通过 Repository 接口进行通信，通俗点说，可以把 Repository 看做仓库管理员，我们要从仓库取东西（业务逻辑），只需要找管理员要就是了（Repository），不需要自己去找（数据访问），具体流程如下图所示：
![](http://www.seedblog.cn/uploads/article/2020-07-01/e7JH2zNWQnS1A2QkczFpb0HOJ824dmrROmjzIXnH.png)
#### 模板文件Stub
需要生成一个RepositoryInterface和对应接口实现Repository，那就需要两个模板文件了。在resources/stubs新建两个模板文件，你可以自定义：
```php
// resources/stubs/Repository/repository_interface.stub
<?php
/**
 * Created by PhpStorm.
 * User: liuxiang
 */
namespace $repository_interface_namespace;
 
interface  $repository_interface
{
    /**
     * @param array $columns
     * @return \Illuminate\Database\Eloquent\Collection|static[]
     */
    public function all($columns = array('*'));
 
    /**
     * @param int $perPage
     * @param array $columns
     * @return \Illuminate\Contracts\Pagination\LengthAwarePaginator
     */
    public function paginate($perPage = 15, $columns = array('*'));
 
    /**
     * Create a new $model_name
     * @param array $data
     * @return \$model_namespace
     */
    public function create(array $data);
 
    /**
     * Update a $model_name
     * @param array $data
     * @return \$model_namespace
     */
    public function update($data = [], $id);
 
    /**
     * Store a $model_name
     * @param array $data
     * @return \$model_namespace
     */
    public function store($data = []);
 
    /**
     * Delete a $model_name
     * @param array $data
     * @return \$model_namespace
     */
    public function delete($data = [], $id);
 
    /**
     * @param $id
     * @param array $columns
     * @return array|\Illuminate\Database\Eloquent\Collection|static[]
     */
    public function find($id, $columns = array('*'));
 
    /**
     * @param $field
     * @param $value
     * @param array $columns
     * @return \Illuminate\Database\Eloquent\Collection|static[]
     */
    public function findBy($field, $value, $columns = array('*'));
}
 
// resources/stubs/Repository/Eloquent/repository.stub
<?php
/**
 * Created by PhpStorm.
 * User: liuxiang
 */
namespace $repository_namespace;
 
use $model_namespace;
use $repository_interface_namespace\$repository_interface;
 
class $class_name implements $repository_interface
{
    /**
     * @var \$model_namespace
     */
    public $$model_var_name;
 
    public function __construct($model_name $$model_var_name)
    {
        $this->$model_var_name = $$model_var_name;
    }
 
    /**
     * @param array $columns
     * @return \Illuminate\Database\Eloquent\Collection|static[]
     */
    public function all($columns = array('*'))
    {
        return $this->$model_var_name->all($columns);
    }
 
    /**
     * @param int $perPage
     * @param array $columns
     * @return \Illuminate\Contracts\Pagination\LengthAwarePaginator
     */
    public function paginate($perPage = 15, $columns = array('*'))
    {
        return $this->$model_var_name->paginate($perPage, $columns);
    }
 
    /**
     * Create a new $model_var_name
     * @param array $data
     * @return \$model_namespace
     */
    public function create(array $data)
    {
        return $this->$model_var_name->create($data);
    }
 
     /**
       * Update a $model_var_name
       * @param array $data
       * @param $id
       * @return \$model_namespace
       */
    public function update($data = [], $id)
    {
        return $this->$model_var_name->whereId($id)->update($data);
    }
 
    /**
     * Store a $model_var_name
     * @param array $data
     * @return \$model_namespace
     */
    public function store($data = [])
    {
        $this->$model_var_name->id = $data['id'];
        //...
        $this->$model_var_name->save();
    }
 
    /**
     * Delete a $model_var_name
     * @param array $data
     * @param $id
     * @return \$model_namespace
     */
    public function delete($data = [], $id)
    {
        $this->$model_var_name->whereId($id)->delete();
    }
 
    /**
     * @param $id
     * @param array $columns
     * @return array|\Illuminate\Database\Eloquent\Collection|static[]
     */
    public function find($id, $columns = array('*'))
    {
        $$model_name = $this->$model_var_name->whereId($id)->get($columns);
        return $$model_name;
    }
 
    /**
     * @param $field
     * @param $value
     * @param array $columns
     * @return \Illuminate\Database\Eloquent\Collection|static[]
     */
    public function findBy($field, $value, $columns = array('*'))
    {
        $$model_name = $this->$model_var_name->where($field, '=', $value)->get($columns);
        return $$model_name;
    }
 
}

```
模板文件里包括参数：
```php
['$repository_namespace', '$model_namespace', '$repository_interface_namespace', '$repository_interface', '$class_name', '$model_name', '$model_var_name']

```
#### Laravel提供了Artisan命令自定义，输入指令:

```php
php artisan make:console MakeRepositoryCommand
```
#### 签名和描述
```php
// app/Console/Commands/MakeRepositoryCommand
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'make:repository {repository} {--model=}';
 
    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Make a repository and interface';
```
这里{repository}是必填参数并指明(选填参数加个?，就和路由参数一样)，将会被$this->argument('repository')方法捕捉到，{--model=}是选项，可填可不填，将会被$this->option('model')方法捕捉到。填上这个命令的描述，最后在Console的Kernel里注册下命令：
```php
// app/Console/Kernel
protected $commands = [
        Commands\MakeRepositoryCommand::class,
    ];
```
#### php artisan命令后就能看到这个make:repository命令
```php
  make:repository      Make a repository and interface
```
#### 在MakeRepositoryCommand.php命令执行文件里写上模板自动生成逻辑
```php
// app/Console/Commands/MakeRepositoryCommand
<?php
 
namespace App\Console\Commands;
 
use Config;
use Illuminate\Console\Command;
use Illuminate\Filesystem\Filesystem;
use Illuminate\Support\Composer;
 
class MakeRepositoryCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'make:repository {repository} {--model=}';
 
    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Make a repository and interface';
 
    /**
     * @var
     */
    protected $repository;
 
    /**
     * @var
     */
    protected $model;
 
    /**
     * Create a new command instance.
     *
     * @param Filesystem $filesystem
     * @param Composer $composer
     */
    public function __construct(Filesystem $filesystem, Composer $composer)
    {
        parent::__construct();
 
        $this->files    = $filesystem;
        $this->composer = $composer;
    }
 
    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        //获取repository和model两个参数值
        $argument = $this->argument('repository');
        $option   = $this->option('model');
        //自动生成RepositoryInterface和Repository文件
        $this->writeRepositoryAndInterface($argument, $option);
        //重新生成autoload.php文件
        $this->composer->dumpAutoloads();
    }
 
    private function writeRepositoryAndInterface($repository, $model)
    {
        if($this->createRepository($repository, $model)){
            //若生成成功,则输出信息
            $this->info('Success to make a '.ucfirst($repository).' Repository and a '.ucfirst($repository).'Interface Interface');
        }
    }
 
    private function createRepository($repository, $model)
    {
        // getter/setter 赋予成员变量值
        $this->setRepository($repository);
        $this->setModel($model);
        // 创建文件存放路径, RepositoryInterface放在app/Repositories,Repository个人一般放在app/Repositories/Eloquent里
        $this->createDirectory();
        // 生成两个文件
        return $this->createClass();
    }
 
    private function createDirectory()
    {
        $directory = $this->getDirectory();
        //检查路径是否存在,不存在创建一个,并赋予775权限
        if(! $this->files->isDirectory($directory)){
            return $this->files->makeDirectory($directory, 0755, true);
        }
    }
 
    private function getDirectory()
    {
        return Config::get('repository.directory_eloquent_path');
    }
 
    private function createClass()
    {
        //渲染模板文件,替换模板文件中变量值
        $templates = $this->templateStub();
        $class     = null;
        foreach ($templates as $key => $template) {
            //根据不同路径,渲染对应的模板文件
            $class = $this->files->put($this->getPath($key), $template);
        }
        return $class;
    }
 
    private function getPath($class)
    {
        // 两个模板文件,对应的两个路径
        $path = null;
        switch($class){
            case 'Eloquent':
                $path = $this->getDirectory().DIRECTORY_SEPARATOR.$this->getRepositoryName().'.php';
                break;
            case 'Interface':
                $path = $this->getInterfaceDirectory().DIRECTORY_SEPARATOR.$this->getInterfaceName().'.php';
                break;
        }
 
        return $path;
    }
 
    private function getInterfaceDirectory()
    {
        return Config::get('repository.directory_path');
    }
 
    private function getRepositoryName()
    {
        // 根据输入的repository变量参数,是否需要加上'Repository'
        $repositoryName = $this->getRepository();
        if((strlen($repositoryName) < strlen('Repository')) || strrpos($repositoryName, 'Repository', -11)){
            $repositoryName .= 'Repository';
        }
        return $repositoryName;
    }
 
    private function getInterfaceName()
    {
        return $this->getRepositoryName().'Interface';
    }
 
    /**
     * @return mixed
     */
    public function getRepository()
    {
        return $this->repository;
    }
 
    /**
     * @param mixed $repository
     */
    public function setRepository($repository)
    {
        $this->repository = $repository;
    }
 
    /**
     * @return mixed
     */
    public function getModel()
    {
        return $this->model;
    }
 
    /**
     * @param mixed $model
     */
    public function setModel($model)
    {
        $this->model = $model;
    }
 
    private function templateStub()
    {
        // 获取两个模板文件
        $stubs        = $this->getStub();
        // 获取需要替换的模板文件中变量
        $templateData = $this->getTemplateData();
        $renderStubs  = [];
        foreach ($stubs as $key => $stub) {
            // 进行模板渲染
            $renderStubs[$key] = $this->getRenderStub($templateData, $stub);
        }
 
        return $renderStubs;
    }
 
    private function getStub()
    {
        $stubs = [
            'Eloquent'  => $this->files->get(resource_path('stubs/Repository').DIRECTORY_SEPARATOR.'Eloquent'.DIRECTORY_SEPARATOR.'repository.stub'),
            'Interface' => $this->files->get(resource_path('stubs/Repository').DIRECTORY_SEPARATOR.'repository_interface.stub'),
        ];
 
        return $stubs;
    }
 
    private function getTemplateData()
    {
        $repositoryNamespace          = Config::get('repository.repository_namespace');
        $modelNamespace               = 'App\\'.$this->getModelName();
        $repositoryInterfaceNamespace = Config::get('repository.repository_interface_namespace');
        $repositoryInterface          = $this->getInterfaceName();
        $className                    = $this->getRepositoryName();
        $modelName                    = $this->getModelName();
 
        $templateVar = [
            'repository_namespace'           => $repositoryNamespace,
            'model_namespace'                => $modelNamespace,
            'repository_interface_namespace' => $repositoryInterfaceNamespace,
            'repository_interface'           => $repositoryInterface,
            'class_name'                     => $className,
            'model_name'                     => $modelName,
            'model_var_name'                 => strtolower($modelName),
        ];
 
        return $templateVar;
    }
 
    private function getRenderStub($templateData, $stub)
    {
        foreach ($templateData as $search => $replace) {
            $stub = str_replace('$'.$search, $replace, $stub);
        }
 
        return $stub;
    }
 
    private function getModelName()
    {
        $modelName = $this->getModel();
        if(isset($modelName) && !empty($modelName)){
            $modelName = ucfirst($modelName);
        }else{
            // 若option选项没写,则根据repository来生成Model Name
            $modelName = $this->getModelFromRepository();
        }
 
        return $modelName;
    }
 
    private function getModelFromRepository()
    {
        $repository = strtolower($this->getRepository());
        $repository = str_replace('repository', '', $repository);
        return ucfirst($repository);
    }
 
}
```
#### 常量值放在config/repository.php配置文件里
```php
<?php
return [ 
    'directory_path' => 'App'.DIRECTORY_SEPARATOR.'Repositories',
    'directory_eloquent_path' => 'App'.DIRECTORY_SEPARATOR.'Repositories'.DIRECTORY_SEPARATOR.'Eloquent',
    'repository_namespace' => 'App\Repositories\Eloquent',
    'repository_interface_namespace' => 'App\Repositories',
 
];
```

在Laravel 中使用仓库(Repository)设计模式,laravel自定义artisan命令生成Repository仓库

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