Architectural convention

This document provides an overview of our conventions and guidelines. The technology landscape is ever-evolving, so this document is subject to continuous refinement and improvement.

Your feedback and suggestions are highly valued to enhance the accuracy, relevance, and effectiveness of Spryker. We encourage you to contribute your insights and recommendations by submitting changes through our designated channels.

Structure of the document

This section describes how to interpret different terms in this document.

Conventions per development use cases

Understanding the development scenarios in which Spryker can be used is crucial for maximizing its potential. This document describes guidelines and conventions tailored to the following use cases:

• Project development: If you are developing a project, you need to adhere to specific project development guidelines to ensure a smooth integration.
• Module development: Contributing reusable third-party modules, boilerplates, or accelerators requires additional considerations. Because such functionalities are reusable on multiple projects in different contexts, these guidelines are more strict than those for project development.
• Core module development: When contributing to Spryker modules, there are rules to follow in the module folders. This ensures consistency and compatibility across product lines in the Spryker Framework. These requirements are the the most strict to be reusable on multiple projects in different business verticals, like B2C, B2B, Marketplace, or Unified Commerce. These rules also ensure the stability of the module API used by Spryker development ecosystem and community.

Directive classification

There are two types of directives:

• Convention: These are mandatory requirements that contributors must adhere to enable specific Spryker features and ensure proper application responses.
• Guideline: While not mandatory, following these guidelines is highly recommended to promote long-term code maintainability and facilitate smoother development processes.

Applications

Spryker uses application layers to enable the construction of the necessary application architecture for specific business requirements to provide a quick project start and long-term maintainability.

• Backend applications, like Zed, Backend API, Backend Gateway, Backoffice, GlueBackend, MerchantPortal, Console, typically use the Zed-, Glue-, Client-, Service-, and Shared application layers.
• Storefront applications, like Yves, Configurator, Glue, GlueStorefront, Console, typically use the Yves-, Glue-, Client-, Service-, and Shared application layers.

Application layers

Spryker organizes responsibilities and functionalities over a set of application layers to enable flexible business logic orchestration across applications.

The application layers are aggregations of layers. Some application layers are multi-layered with components organized in layer directories, while others are flat-layered with components merged in the same directory.

| APPLICATION LAYER | LAYERING | LAYER | |-|-| | Glue | flat-layered | Communication layer | | Client | flat-layered | Communication layer | | Service | flat-layered | Overarching Business layer | | Yves | flat-layered | Presentation layer merged with Communication layer | | Zed | multi-layered | Presentation, Communication, Business, and Persistence layers |

The Shared application layer is a layer-overarching, stateless, abstraction library.

Zed

Zed serves as the backend application layer responsible for housing all business logic, persisting data and the backend UI, like the Back Office.

[Organization]
└── Zed
    └── [Module]
        ├── Presentation
        │   ├── Layout
        │   │   └── [layout-name].twig
        │   └── [name-of-controller]
        │       └── [name-of-action].twig
        │    
        ├── Communication
        │   ├── Controller
        │   │   ├── IndexController.php
        │   │   ├── GatewayController.php
        │   │   └── [Name]Controller.php
        │   ├── [CustomDirectory]
        │   │   ├── [ModelName]Interface.php
        │   │   └── [ModelName].php        
        │   ├── Exception
        │   ├── Plugin
        │   │   └── [ConsumerModule]
        │   │       └── [PluginName]Plugin.php
        │   ├── Form
        │   │   ├── [Name]Form.php
        │   │   └── DataProvider
        │   │       └── [Name]FormDataProvider.php
        │   ├── Table
        │   │   └── [Name]Table.php                
        │   ├── navigation.xml       
        │   └── [Module]CommunicationFactory.php
        │            
        ├── Business
        │   ├── [CustomDirectory]
        │   │   ├── [ModelName]Interface.php
        │   │   └── [ModelName].php        
        │   ├── Exception   
        │   ├── [Module]BusinessFactory.php
        │   ├── [Module]Facade.php
        │   └── [Module]FacadeInterface.php
        │
        ├── Persistence
        │   ├── [Module]EntityManagerInterface.php
        │   ├── [Module]EntityManager.php
        │   ├── [Module]QueryContainer.php
        │   ├── [Module]PersistenceFactory.php
        │   ├── [Module]RepositoryInterface.php
        │   ├── [Module]Repository.php
        │   └── Propel
        │       ├── Abstract[TableName].php
        │       ├── AbstractSpy[TableName]Query.php
        │       ├── Mapper
        │       │   └── [Module|Entity]Mapper.php
        │       └── Schema
        │           └── [organization_name]_[domain_name].schema.xml
        │
        ├── Dependency
        │   ├── Client
        │   │   ├── [Module]To[Module]ClientBridge.php
        │   │   └── [Module]To[Module]ClientInterface.php          
        │   ├── Facade
        │   │   ├── [Module]To[Module]FacadeBridge.php
        │   │   └── [Module]To[Module]FacadeInterface.php
        │   ├── QueryContainer
        │   │   ├── [Module]To[Module]QueryContainerBridge.php
        │   │   └── [Module]To[Module]QueryContainerInterface.php      
        │   ├── Service
        │   │   ├── [Module]To[Module]ServiceBridge.php
        │   │   └── [Module]To[Module]ServiceInterface.php      
        │   └── Plugin
        │       └── [PluginInterfaceName]PluginInterface.php
        │                
        ├── [Module]Config.php
        └── [Module]DependencyProvider.php

Used components:

• Bridge
• Config
• Controller
• Dependency provider
• Entity
• Entity Manager
• Facade
• Factory
• Gateway controller
• Layout
• Mapper / Expander / Hydrator
• Models
• navigation.xml
• Plugin, Plugin Interface
• Query container
• Query object
• Repository
• Schema

Yves

Yves application layer provides a lightweight shop application.

[Organization]
└── Yves
    └── [Module]
        ├── Controller
        │   ├── IndexController.php
        │   └── [Name]Controller.php
        ├── [CustomDirectory]
        │   ├── [ModelName]Interface.php
        │   └── [ModelName].php                
        ├── Dependency
        │   ├── Client
        │   │   ├── [Module]To[Module]ClientBridge.php
        │   │   └── [Module]To[Module]ClientInterface.php
        │   ├── Service
        │   │   ├── [Module]To[Module]ServiceBridge.php
        │   │   └── [Module]To[Module]ServiceInterface.php           
        │   └── Plugin
        │       └── [PluginInterfaceName]PluginInterface.php
        ├── Plugin
        │   ├── Provider
        │   │   └── [Name]ControllerProvider.php
        │   └── [ConsumerModule]
        │       ├── [PluginName]Plugin.php
        │       └── [RouterName]Plugin.php
        ├── Theme
        │   └── ["default"|theme]
        │       ├── components
        │       │   │── organisms
        │       │   │   └── [organism-name]
        │       │   │       └── [organism-name].twig
        │       │   │── atoms
        │       │   │   └── [atom-name]
        │       │   │       └── [atom-name].twig
        │       │   └── molecules
        │       │       └── [molecule-name]
        │       │           └── [molecule-name].twig
        │       ├── templates
        │       │   ├── page-layout-[page-layout-name]
        │       │   │   └── page-layout-[page-layout-name].twig
        │       │   └── [template-name]
        │       │       └── [template-name].twig
        │       └── views
        │           └── [name-of-controller]
        │               └── [name-of-action].twig        
        ├── Widget
        │   └── [Name]Widget.php
        ├── [Module]Config.php
        ├── [Module]DependencyProvider.php
        └── [Module]Factory.php

Used components:

• Bridge
• Config
• Controller
• Dependency Provider
• Factory
• Layout
• Mapper / Expander / Hydrator
• Model
• Provider / Router
• Plugin, Plugin Interface
• Templates
• Theme
• Widget

Glue

The Glue application layer provides data access points through APIs. It acts as an interface for external systems to interact with the application’s data.

[Organization]
└── Glue
    └── [Module]
        ├── Controller
        │   ├── IndexController.php        
        │   └── [Name]Controller.php                
        ├── [CustomDirectory]
        │   ├── [ModelName]Interface.php
        │   └── [ModelName].php        
        ├── Dependency
        │   ├── Client
        │   │   ├── [Module]To[Module]ClientBridge.php
        │   │   └── [Module]To[Module]ClientInterface.php
        │   ├── Facade
        │   │   ├── [Module]To[Module]FacadeBridge.php
        │   │   └── [Module]To[Module]FacadeInterface.php
        │   ├── QueryContainer
        │   │   ├── [Module]To[Module]QueryContainerBridge.php
        │   │   └── [Module]To[Module]QueryContainerInterface.php      
        │   ├── Service
        │   │   ├── [Module]To[Module]ServiceBridge.php
        │   │   └── [Module]To[Module]ServiceInterface.php           
        │   └── Plugin
        │       └── [PluginInterfaceName]PluginInterface.php
        ├── Plugin
        │   ├── Provider
        │   │   └── [Name]ControllerProvider.php
        │   └── [ConsumerModule]
        │       └── [PluginName]Plugin.php
        ├── [Module]Config.php
        ├── [Module]DependencyProvider.php
        └── [Module]Factory.php

Used components:

• Bridge
• Config
• Controller
• Dependency Provider
• Factory
• Mapper / Expander / Hydrator
• Model
• Plugin, Plugin Interface

Client

Client is a lightweight application layer that handles all data access, such as the following:

• Persistence access: key-value storage (Redis), Search (Elasticsearch), Yves sessions
• Zed as a data-source (RPC)
• Third-party communication

[Organization]
└── Client
    └── [Module]
        ├── [CustomDirectory]
        │   ├── [ModelName]Interface.php
        │   └── [ModelName].php        
        ├── Dependency
        │   ├── Client
        │   │   ├── [Module]To[Module]ClientBridge.php
        │   │   └── [Module]To[Module]ClientInterface.php
        │   ├── Service
        │   │   ├── [Module]To[Module]ServiceBridge.php
        │   │   └── [Module]To[Module]ServiceInterface.php           
        │   └── Plugin
        │       └── [PluginInterfaceName]PluginInterface.php            
        ├── Plugin
        │   └── [ConsumerModule]
        │       └── [PluginName]Plugin.php
        ├── Zed
        │   ├── [Module]Stub.php
        │   └── [Module]StubInterface.php
        ├── [Module]ClientInterface.php
        ├── [Module]Client.php
        ├── [Module]Config.php
        ├── [Module]DependencyProvider.php
        └── [Module]Factory.php

Used components:

• Bridge
• Client facade
• Config
• Dependency Provider
• Factory
• Mapper / Expander / Hydrator
• Model
• Plugin, Plugin Interface
• Zed Stub

Service

The Service application layer is a multipurpose library that’s used across various application layers, such as Yves, Client, Glue, or Zed.

A service primarily consists of reusable lightweight stateless business logic components. Because of its deployment across all applications, a service is constrained to accessing data providers that are available universally. For example, the backend database is not accessible from Storefront applications by default.

[Organization]
└── Service
    └── [Module]
        ├── [CustomDirectory]
        │   ├── [ModelName]Interface.php
        │   └── [ModelName].php        
        ├── [Module]Config.php            
        ├── [Module]DependencyProvider.php
        ├── [Module]ServiceFactory.php
        ├── [Module]ServiceInterface.php
        └── [Module]Service.php

Used components:

• Config
• Dependency Provider
• Factory
• Mapper / Expander / Hydrator
• Model
• Service facade

Shared

The Shared library contains code and configuration that’s used across any application layer and module. It facilitates the sharing of code among application layers and modules.

To ensure compatibility and versatility across different application architecture setups, the content in the Shared library must be free of application layer-specific elements. So, factories are not allowed in the Shared library.

[Organization]
└── Shared
    └── [Module]
        ├── Transfer
        │   └── [module_name].transfer.xml
        ├── [Module]Constants.php
        └── [Module]Config.php

Used components:

• Config
• Constants
• Transfer

Layers

An application layer can have up to four logical layers with clear purpose and communication rules:

• Presentation layer: contains frontend assets, like Twig templates, JS, or CSS files.
• Communication layer: contains controllers, console commands, forms, tables, and plugins.
• Business layer: contains the business logic of a module.
• Persistence layer: contains repository, entity manager, simple data mappers, and the schema of entities.

Presentation layer responsibilities

• Handles the UI presentation.
• Contains frontend assets, like HTML, Twig templates, JS, TypeScript, or CSS files.
• Handles user interactions and input validations on the client side.
• Interacts with the Communication layer to retrieve data for display.

Communication layer responsibilities

• Acts as an intermediary between the Presentation layer and the Business layer.
• Contains controllers responsible for handling HTTP requests and responses.
• Contains plugins responsible for flexible, overarching requests and responses.
• Contains console commands.
• Manages form processing and validation.
• Handles routing and dispatching requests to appropriate controllers.
• Interacts with the Business layer to perform business operations.

Business layer responsibilities

• Contains the main business logic.
• Implements business rules and processes.
• Performs data manipulation, calculations, and validation.
• Interacts with the Persistence Layer to read and write data.

Persistence layer responsibilities

• Responsible for data storage and retrieval.
• Contains queries (via Entity Manager or Repository), entities (data models), and database schema definitions.
• Handles database operations such as CRUD: create, read, update, delete.
• Ensures data integrity and security.
• Maps database entities into business data transfer objects.

Components

Conventions

• Components must be placed according to the corresponding application layer’s directory architecture to take effect.
• Components are required to inherit from the application layer corresponding abstract class in the Kernel module to take effect.

Guidelines

• The components should be stateless to be deterministic and easy to comprehend.

Controller

[Organization]
├── Zed
│   └── [Module]
│       └── Communication
│           └── Controller
│               ├── IndexController.php
│               ├── GatewayController.php
│               └── [Name]Controller.php
│
├── Yves
│   └── [Module]
│       └── Controller
│           ├── IndexController.php
│           └── [Name]Controller.php    
│
└── Glue
    └── [Module]
        └── Controller
            ├── IndexController.php        
            └── [Name]Controller.php                      

Controllers and Actions are application access points for any kind of HTTP communication with end-users or other applications.

Responsibilities of a controller are as follows:

• Adapt the received input data to the underlying layers: syntactical validation, delegation.
• Delegate the processing of the input data.
• Adapt the results of processing to the expected output format. For example, add flash messages, set a response format, trigger a redirect.

The Gateway controller name is reserved for the Gateway Controller.

The Index controller name acts as the default controller during request controller resolution.

The index action name acts as the default action during request action resolution.

Conventions

• Action methods must be suffixed with Action and be public in order to be accessible. They need to define the entry points of the Controller in a straight-forward manner.

Guidelines

• Controller has an inherited castId() method that should be used for casting numerical IDs.
• The inherited getFactory() method grants access to the Factory.
• The inherited getFacade() and getClient() methods grant access to the corresponding facade functionalities.

Examples

<?php

namespace Pyz\Zed\ConfigurableBundleGui\Communication\Controller;

/**
 * @method \Pyz\Zed\ConfigurableBundleGui\Communication\ConfigurableBundleGuiCommunicationFactory getFactory()
 * @method \Spryker\Zed\ConfigurableBundleGui\Business\ConfigurableBundleGuiFacadeInterface getFacade()
 */
class TemplateController extends Spryker\Zed\ConfigurableBundleGui\Communication\Controller\TemplateController
{
    /**
     * @var string
     */
    protected const PARAM_ID_CONFIGURABLE_BUNDLE_TEMPLATE = 'id-configurable-bundle-template';

    /**
     * @param \Symfony\Component\HttpFoundation\Request $request
     *
     * @return \Symfony\Component\HttpFoundation\JsonResponse
     */
    public function slotTableAction(Request $request): JsonResponse
    {
        $idConfigurableBundleTemplate = $this->castId(
            $request->get(static::PARAM_ID_CONFIGURABLE_BUNDLE_TEMPLATE),
        );

        $table = $this->getFactory()->createConfigurableBundleTemplateSlotTable($idConfigurableBundleTemplate);

        return $this->jsonResponse($table->fetchData());
    }
}

Dependency Provider

[Organization]
├── Zed
│   └── [Module]        
│       └── [Module]DependencyProvider.php
├── Yves
│   └── [Module]        
│       └── [Module]DependencyProvider.php
├── Glue
│   └── [Module]        
│       └── [Module]DependencyProvider.php
├── Client
│   └── [Module]        
│       └── [Module]DependencyProvider.php
└── Service
    └── [Module]        
        └── [Module]DependencyProvider.php

Injects required dependencies into the module application layer. Typically, dependencies are facades or plugins.

Dependency injection is orchestrated through a provide-add-get structure. See the following examples.

• The provide method is the highest level that holds only add calls without any additional logic.
• The add method is the middle level that injects the dependencies into the dependency container using a class constant and a late-binding instantiating closure.
• The get method is the lowest level that sources the dependency.

Conventions

• Setting a dependency using the container::set() needs to be paired with late-binding closure definition to decouple instantiation.
• Dependencies that require individual instances per injection need to additionally use the Container::factory() method to ensure expected behavior. For example, Query Objects. See the following examples.
• Provide methods need to call their parent provide method to inject the parent-level dependencies.
• Dependencies need to be wired through the target layer corresponding to the inherited method to be accessible via the corresponding Factory:

public function provideCommunicationLayerDependencies(Container $container)
public function provideBusinessLayerDependencies(Container $container)
public function providePersistenceLayerDependencies(Container $container)
public function provideDependencies(Container $container)
public function provideBackendDependencies(Container $container)
public function provideServiceLayerDependencies(Container $container)

function provide*Dependencies(Container $container)
function add[Dependency](Container $container)
function add[PluginInterfaceName]Plugins(Container $container)
function get[Dependency](Container $container)
function get[PluginInterfaceName]Plugins(Container $container)

Guidelines

Dependency constant names should be descriptive and follow the [COMPONENT_NAME]_[MODULE_NAME] or PLUGINS_[PLUGIN_INTERFACE_NAME] pattern, with a name matching its value. See the following examples.

Examples

namespace Spryker\Zed\Agent;

use Orm\Zed\User\Persistence\SpyUserQuery;
use Spryker\Zed\Kernel\Container;

class AgentDependencyProvider extends Spryker\Zed\Kernel\AbstractBundleDependencyProvider
{
    public const PROPEL_QUERY_USER = 'PROPEL_QUERY_USER';

    public function providePersistenceLayerDependencies(Container $container)
    {
        $container = $this->addUserPropelQuery($container);

        return $container;
    }

    protected function addUserPropelQuery(Container $container): Container
    {
        $container->set(static::PROPEL_QUERY_USER, $container->factory(function (): SpyUserQuery {
            return SpyUserQuery::create();
        }));

        return $container;
    }
}

<?php

namespace Pyz\Zed\ConfigurableBundle;

use Spryker\Zed\ConfigurableBundle\Dependency\Facade\ConfigurableBundleToGlossaryFacadeBridge;

/**
 * @method \Spryker\Zed\ConfigurableBundle\ConfigurableBundleConfig getConfig()
 */
class ConfigurableBundleDependencyProvider extends Spryker\Zed\ConfigurableBundle\ConfigurableBundleDependencyProvider
{
    /**
     * @var string
     */
    public const FACADE_GLOSSARY = 'FACADE_GLOSSARY';

    /**
     * @var string
     */
    public const PLUGINS_PRODUCT_OFFER_POST_UPDATE = 'PLUGINS_PRODUCT_OFFER_POST_UPDATE';

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\Kernel\Container
     */
    public function provideBusinessLayerDependencies(Container $container): Container
    {
        $container = parent::provideBusinessLayerDependencies($container);
        $container = $this->addGlossaryFacade($container);
        $container = $this->addProductOfferPostUpdatePlugins($container);

        return $container;
    }

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\Kernel\Container
     */
    public function provideCommunicationLayerDependencies(Container $container): Container
    {
        $container = parent::provideCommunicationLayerDependencies($container);

        return $container;
    }

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\Kernel\Container
     */
    public function providePersistenceLayerDependencies(Container $container): Container
    {
        $container = parent::providePersistenceLayerDependencies($container);

        return $container;
    }

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\Kernel\Container
     */
    protected function addGlossaryFacade(Container $container): Container
    {
        $container->set(static::FACADE_GLOSSARY, function (Container $container) {
                $container->getLocator()->glossary()->facade()
        });

        return $container;
    }

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\Kernel\Container
     */
    protected function addProductOfferPostUpdatePlugins(Container $container): Container
    {
        $container(static::PLUGINS_PRODUCT_OFFER_POST_UPDATE, function (Container $container) {
            return $this->getProductOfferPostUpdatePlugins($container);
        });

        return $container;
    }

    /**
     * @api
     *
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return array<\Spryker\Zed\ProductOfferExtension\Dependency\Plugin\ProductOfferPostUpdatePluginInterface>
     */
    protected function getProductOfferPostUpdatePlugins(Container $container): array
    {
        return [];
    }
}

Entity

src
├── Generated
│   └── Shared
│       └── Transfer
│           └── [EntityName]EntityTransfer.php
│
├── Orm
│   └── Zed   
│       └── [DomainName]   
│           ├── Base
│           │   ├── [EntityName].php
│           │   └── [EntityName]Query.php
│           ├── Map
│           │   └── [EntityName]TableMap.php
│           ├── [EntityName].php
│           └── [EntityName]Query.php
│
└── [Organisation]
    └── Zed
        └── [ModuleName]
            └── Persistence
                └── Propel
                    ├── Abstract[EntityName].php
                    └── Abstract[EntityName]Query.php

An active record object that represents a row in a table. Entities have getter and setter methods to access the underlying data. Each Entity has a generated identical Entity Transfer Object, which can be used during the interaction with other layers. Each database table definition results in the creation of an Entity by Propel.

3-tier class hierarchy: The Propel generated 2-tier Entity class hierarchy is injected in the middle with a core module abstract class to enable adding functionality from the core module level. See the following examples.

For more information, see Active Record Class in the Propel docs.

For more details on domains, see Persistence Schema.

Conventions

• Entity classes need to be generated via Persistence Schema.
• Entities can’t leak to any facade’s level. That’s because they are heavy, stateful, module-specific objects.
• Entities must be implemented according to the 3-tier class hierarchy to support extension from Propel and SCOS. For more context, see the description and examples.

Guidelines

• A typical use case is to define preSave() or postSave() methods in the Entity object.
• We recommend defining manager classes instead of overloading the Entity with complex or context-specific logic.
• Entities should not leak outside the module’s persistence layer.

Examples

The lowest-level class generated by Propel, containing the base Propel functionality.

namespace Orm\Zed\ConfigurableBundle\Persistence\Base;

/**
 * Base class that represents a row from the 'spy_configurable_bundle_template' table.
 */
abstract class SpyConfigurableBundleTemplate implements Propel\Runtime\ActiveRecord\ActiveRecordInterface {...}

The middle-level class generated in a Spryker module, containing the core module functionality.

namespace Spryker\Zed\ConfigurableBundle\Persistence\Propel;

abstract class AbstractSpyConfigurableBundleTemplate extends Orm\Zed\ConfigurableBundle\Persistence\Base\SpyConfigurableBundleTemplate {...}

The highest-level class generated on project, containing the project-specific functionality.

namespace Orm\Zed\ConfigurableBundle\Persistence;

class SpyConfigurableBundleTemplate extends Spryker\Zed\ConfigurableBundle\Persistence\Propel\AbstractSpyConfigurableBundleTemplate {...}

Entity Manager

[Organization]
└── Zed
    └── [Module]
        └── Persistence
            ├── [Module]EntityManagerInterface.php
            └── [Module]EntityManager.php

Persists Entities by using their internal saving mechanism and/or collaborating with Query Objects. The Entity Manager can be accessed from the same module’s business layer.

Conventions

No general conventions.

Guidelines

No general guidelines.

Facade design pattern

[Organization]
├── Client
│   └── [Module]
│       ├── [Module]ClientInterface.php
│       └── [Module]Client.php        
├── Service
│   └── [Module]
│       ├── [Module]Service.php
│       └── [Module]ServiceInterface.php
└── Zed
    └── [Module]
        ├── Business
        │   ├── [Module]Facade.php
        │   └── [Module]FacadeInterface.php    
        └── Persistence
            └── [Module]QueryContainer.php                   

Spryker defines the facade design pattern as the primary entry point for layers following the standard facade design pattern.

There are four components that use the facade design pattern, referred to as facades:

• Facade is the API of Business layer.
• Client is the API of Client application layer, and it’s the only entry point to the Client Application.
• Service is the API of Service application layer, and it’s the only entry point to the Service Application.
• Query Container is the API of Persistence layer, and it’s the entry point to database access. The more advanced and modular Entity Manager and Repository pattern counter the problems of cross-module leaks of the Query Container concept.

The facades provide functionality for other layers and modules. The functionality behind the facade accesses other sibling functionality directly and not from the facade. For example, Models call their sibling Models as a dependency rather than through the facade.

Conventions

• All methods need to have Transfer Objects or native types as an argument and return a value.

Guidelines

• The Service facade functionalities are commonly used to transform data, so CUD directives are usually not applicable.
• Avoid single-item-flow methods because they aren’t scalable.

Examples

namespace Spryker\Client\ConfigurableBundleCart;

/**
 * @method \Spryker\Client\ConfigurableBundleCart\ConfigurableBundleCartFactory getFactory()
 */
class ConfigurableBundleCartClient extends Spryker\Client\Kernel\AbstractClient implements ConfigurableBundleCartClientInterface
{
    /**
     * {@inheritDoc}
     *
     * @api
     *
     * @param \Generated\Shared\Transfer\CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer
     *
     * @return \Generated\Shared\Transfer\QuoteResponseTransfer
     */
    public function addConfiguredBundle(CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer): QuoteResponseTransfer
    {
        return $this->getFactory()
            ->createConfiguredBundleCartAdder()
            ->addConfiguredBundleToCart($createConfiguredBundleRequestTransfer);
    }
}

namespace Spryker\Client\ConfigurableBundleCart;

interface ConfigurableBundleCartClientInterface
{
    /**
     * Specification:
     * - Adds configured bundle to the cart.
     * - Requires `configuredBundle.quantity` property to control amount of configured bundles put to cart.
     * - Requires `configuredBundle.template.uuid` property to populate configurable bundle template related data.
     * - Requires `items` property with `sku`, `quantity` and `configuredBundleItem.slot.uuid` properties to define how many
     * items were added in total to a specific slot.
     * - Returns QuoteResponseTransfer.
     *
     * @api
     *
     * @param \Generated\Shared\Transfer\CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer
     *
     * @return \Generated\Shared\Transfer\QuoteResponseTransfer
     */
    public function addConfiguredBundle(CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer): QuoteResponseTransfer;
}

namespace Spryker\Zed\ConfigurableBundle\Business;

/**
 * @method \Spryker\Zed\ConfigurableBundle\Business\ConfigurableBundleBusinessFactory getFactory()
 * @method \Spryker\Zed\ConfigurableBundle\Persistence\ConfigurableBundleEntityManagerInterface getEntityManager()
 * @method \Spryker\Zed\ConfigurableBundle\Persistence\ConfigurableBundleRepositoryInterface getRepository()
 */
class ConfigurableBundleFacade extends Spryker\Zed\Kernel\Business\AbstractFacade implements ConfigurableBundleFacadeInterface
{
    /**
     * {@inheritDoc}
     *
     * @api
     *
     * @param \Generated\Shared\Transfer\ConfigurableBundleTemplateFilterTransfer $configurableBundleTemplateFilterTransfer
     *
     * @return \Generated\Shared\Transfer\ConfigurableBundleTemplateResponseTransfer
     */
    public function getConfigurableBundleTemplate(
        ConfigurableBundleTemplateFilterTransfer $configurableBundleTemplateFilterTransfer
    ): ConfigurableBundleTemplateResponseTransfer {
        return $this->getFactory()
            ->createConfigurableBundleTemplateReader()
            ->getConfigurableBundleTemplate($configurableBundleTemplateFilterTransfer);
    }
}

namespace Spryker\Zed\ConfigurableBundle\Business;

interface ConfigurableBundleFacadeInterface
{
    /**
     * Specification:
     * - Retrieves configurable bundle template from Persistence.
     * - Filters by criteria from ConfigurableBundleTemplateFilterTransfer.
     * - Expands found configurable bundle templates with translations.
     * - Returns translations for locales specified in ConfigurableBundleTemplateFilterTransfer::translationLocales, or for all available locales otherwise.
     * - Returns product image sets for locales specified in ConfigurableBundleTemplateFilterTransfer::translationLocales, or for all available locales otherwise.
     * - Returns always empty-locale ("default") image sets.
     * - Returns fallback locale translation if provided single locale translation doesn't exist or translation key if nothing found.
     *
     * @api
     *
     * @param \Generated\Shared\Transfer\ConfigurableBundleTemplateFilterTransfer $configurableBundleTemplateFilterTransfer
     *
     * @return \Generated\Shared\Transfer\ConfigurableBundleTemplateResponseTransfer
     */
    public function getConfigurableBundleTemplate(
        ConfigurableBundleTemplateFilterTransfer $configurableBundleTemplateFilterTransfer
    ): ConfigurableBundleTemplateResponseTransfer;
}

Factory

[Organization]
├── Zed
│   └── [Module]
│       ├── Communication
│       │   └── [Module]CommunicationFactory.php
│       │
│       ├── Business
│       │   └── [Module]BusinessFactory.php
│       │
│       └── Persistence
│           └── [Module]PersistenceFactory.php
├── Yves
│   └── [Module]
│       └── [Module]Factory.php
├── Glue
│   └── [Module]
│       └── [Module]Factory.php
├── Client
│   └── [Module]
│       └── [Module]Factory.php
└── Service
    └── [Module]
        └── [Module]ServiceFactory.php

Factory instantiates classes and injects dependencies during instantiation.

Conventions

No general conventions.

Gateway Controller

[Organization]
└── Zed
    └── [Module]
        └── Communication
            └── Controller
                └── GatewayController.php

Gateway Controller is a special reserved Controller in the core that serves as an entry point in Zed for serving remote application Client requests. For more details, see Zed Stub.

Conventions

• Gateway Controller actions must define a single transfer object as an argument and another or the same transfer object for return.
• Gateway Controllers follow the Controller conventions.

Layout

[Organization]
├── Yves
│   └── [Module]
│       └── Theme
│           └── ["default"|theme]
│               └── templates
│                   ├── page-layout-[page-layout-name]
│                   │   └── page-layout-[page-layout-name].twig
│                   └── [template-name]
│                       └── [template-name].twig                
└── Zed
    └── [Module]
        └── Presentation
            └── Layout
                └── [layout-name].twig

A Layout is the skeleton of a page and defines its structure.

Mapper / Expander / Hydrator

To differentiate between the recurring cases of data mapping, and to provide a clear separation of concerns, the following terms are introduced:

• Mappers are lightweight transforming functions that adjust one specific data structure to another in solitude, that is without reaching out for additional data than the provided input.
  • Persistance Mapper stands for Mappers in Persistence layer, typically transforming propel entities, entity transfers objects, or generic transfer objects.
• Expanders source additional data into the provided input; restructuring may also happen.

Conventions

No general conventions.

Examples

namespace Spryker\Zed\ConfigurableBundle\Persistence\Propel\Mapper;

class ConfigurableBundleMapper
{
    /**
     * @param \Propel\Runtime\Collection\Collection $configurableBundleTemplateEntities
     *
     * @return \Generated\Shared\Transfer\ConfigurableBundleTemplateCollectionTransfer
     */
    public function mapTemplateEntityCollectionToTemplateTransferCollection(
        Collection $configurableBundleTemplateEntities
    ): ConfigurableBundleTemplateCollectionTransfer {
        $configurableBundleTemplateCollectionTransfer = new ConfigurableBundleTemplateCollectionTransfer();

        foreach ($configurableBundleTemplateEntities as $configurableBundleTemplateEntity) {
            $configurableBundleTemplateTransfer = $this->mapTemplateEntityToTemplateTransfer(
                $configurableBundleTemplateEntity,
                new ConfigurableBundleTemplateTransfer(),
            );

            $configurableBundleTemplateCollectionTransfer->addConfigurableBundleTemplate($configurableBundleTemplateTransfer);
        }

        return $configurableBundleTemplateCollectionTransfer;
    }
}

namespace Spryker\Client\ProductReview\ProductViewExpander;

class ProductViewExpander implements ProductViewExpanderInterface
{
    public function __construct(
        ProductReviewSummaryCalculatorInterface $productReviewSummaryCalculator,
        ProductReviewSearchReaderInterface $productReviewSearchReader
    ) {
        $this->productReviewSummaryCalculator = $productReviewSummaryCalculator;
        $this->productReviewSearchReader = $productReviewSearchReader;
    }

    public function expandProductViewWithProductReviewData(
        ProductViewTransfer $productViewTransfer,
        ProductReviewSearchRequestTransfer $productReviewSearchRequestTransfer
    ): ProductViewTransfer {
        $productReviews = $this->productReviewSearchReader->findProductReviews($productReviewSearchRequestTransfer);

        if (!isset($productReviews[static::KEY_RATING_AGGREGATION])) {
            return $productViewTransfer;
        }

        $productReviewSummaryTransfer = $this->productReviewSummaryCalculator
            ->calculate($this->createRatingAggregationTransfer($productReviews));

        $productViewTransfer->setRating($productReviewSummaryTransfer);

        return $productViewTransfer;
    }
}

Model

[Organization]
├── Zed
│   └── [Module]
│       ├── Communication
│       │   └── [CustomDirectory]
│       │       ├── [ModelName]Interface.php
│       │       └── [ModelName].php   
│       └── Business
│           └── [CustomDirectory]
│               ├── [ModelName]Interface.php
│               └── [ModelName].php  
├── Yves
│   └── [Module]
│       └── [CustomDirectory]
│           ├── [ModelName]Interface.php
│           └── [ModelName].php   
├── Glue
│   └── [Module]
│       └── [CustomDirectory]
│           ├── [ModelName]Interface.php
│           └── [ModelName].php    
├── Client
│   └── [Module]
│       └── [CustomDirectory]
│           ├── [ModelName]Interface.php
│           └── [ModelName].php                
└── Service
    └── [Module]
        └── [CustomDirectory]
            ├── [ModelName]Interface.php
            └── [ModelName].php    

Models encapsulate logic and can be used across various layers in the application architecture and in the boundaries of each layer’s specific responsibilities.

• Communication layer Models are present in Yves, Glue, and Client.
• Business layer Models are present in Zed and Service.
• Persistence layer Models are present in Zed.

Conventions

• Model dependencies can be facades or from the same module, either Models, Repository, Entity Manager or Config.
  • Models can’t directly interact with other modules’ Models: via inheritance, shared constants, instantiation, etc.

Module Configurations

[Organization]
├── Zed
│   └── [Module]
│       └── [Module]Config.php
├── Yves
│   └── [Module]
│       └── [Module]Config.php  
├── Glue
│   └── [Module]
│       └── [Module]Config.php    
├── Client
│   └── [Module]
│       └── [Module]Config.php   
├── Service
│   └── [Module]      
│       └── [Module]Config.php
└── Shared
    └── [Module]
        ├── [Module]Constants.php
        └── [Module]Config.php       

• Module configuration: module specific, environment independent configuration in [Module]Config.php.
• Environment configuration: configuration keys in [Module]Constants.php that can be controlled per environment via config_default.php.

The module configuration class can access the environment configuration values using $this->get('key').

When module configuration is defined in the Shared application layer, it can be accessed from any other application layer using the application layer specific Config.

When module configuration is defined in an application layer other than Shared, they are dedicated and accessible only to that single application layer.

Conventions

No general conventions.

Guidelines

No general guidelines.

Examples

namespace Spryker\Shared\Oms;

interface OmsConstants
{
    /**
     * Specification:
     * - Defines if OMS transition log is enabled.
     *
     * @api
     *
     * @var string
     */
    public const ENABLE_OMS_TRANSITION_LOG = 'OMS:ENABLE_OMS_TRANSITION_LOG';
}

Navigation.XML

[Organization]
└── Zed
    └── [Module]
        └── Communication              
            └── navigation.xml   

Module entries of the Back Office navigation panel. The icons are taken from Font Awesome Icons Library.

Examples

The following example adds navigation elements under the existing product navigation element, which is defined in another module:

• The pages reserved node holds the navigation items.
• The navigation items are defined within the configurable-bundle-templates logical node according to business requirements.
• The bundle identifies which module the processing controller is located in.
• The icon is the Font Awesome Icon name.

<?xml version="1.0"?>
<config>
  <product>
    <pages>
      <configurable-bundle-templates>
        <label>Configurable Bundle Templates</label>
        <title>Configurable Bundle Templates</title>
        <icon>fa-files-o</icon>
        <bundle>configurable-bundle-gui</bundle>
        <controller>template</controller>
        <action>index</action>
        <visible>1</visible>
        <pages>
          <configurable-bundle-template-create>
            <label>Create Configurable Bundle Template</label>
            <title>Create Configurable Bundle Template</title>
            <bundle>configurable-bundle-gui</bundle>
            <controller>template</controller>
            <action>create</action>
            <visible>0</visible>
          </configurable-bundle-template-create>
        </pages>
      </configurable-bundle-templates>
    </pages>
  </product>
</config>

Permission Plugin

[Organization]
├── Zed
│   └── [Module]
│       └── Communication
│           └── Plugin
│               └── [ConsumerModule]
│                   └── [PluginName]Plugin.php
├── Yves
│   └── [Module]
│       └── Plugin
│           └── [ConsumerModule]
│               └── [PluginName]Plugin.php
├── Glue
│   └── [Module]
│       └── Plugin
│           └── [ConsumerModule]
│               └── [PluginName]Plugin.php    
└── Client
    └── [Module]        
        └── Plugin
            └── [ConsumerModule]
                └── [PluginName]Plugin.php        

Permission Plugins are used to put a scope on the usage of an application during a request lifecycle.

Conventions

• Permission Plugins need to implement \Spryker\Shared\PermissionExtension\Dependency\Plugin\PermissionPluginInterface.
• Permission Plugins need to adhere to Plugin conventions.

Guidelines

• When using one of the traits in a Model, when possible, refer directly to the remote Permission Plugin key string instead of defining a local constant.
• The \Spryker\[Application]\Kernel\PermissionAwareTrait trait enables the Model in the corresponding application to check if a permission is granted to an application user.

Examples

class QuotePermissionChecker implements QuotePermissionCheckerInterface
{
    use PermissionAwareTrait;

    /**
     * @uses \Spryker\Client\SharedCart\Plugin\ReadSharedCartPermissionPlugin::KEY
     */
    protected const PERMISSION_PLUGIN_KEY_READ_SHARED_CART = 'ReadSharedCartPermissionPlugin';

    public function checkQuoteReadPermission(QuoteTransfer $quoteTransfer): bool
    {
        ...
      return $this->can(
        static::PERMISSION_PLUGIN_KEY_READ_SHARED_CART,
        $quoteTransfer->getCustomer()->getCompanyUserTransfer()->getIdCompanyUser(),
        $quoteTransfer->getIdQuote(),
      );
    }

Persistence Schema

[Organization]
└── Zed
    └── [Module]
        └── Persistence
            └── Propel
                └── Schema
                    └── spy_[domain_name].schema.xml

The schema file defines the module’s tables and columns. Schema files are organized into business domains, each representing a module overarching group that encapsulates related domain entities. For more details, see Propel Documentation - Schema XML.

Conventions

• Tables need to have an integer ID primary key following the id_[domain_entity_name] format. Examples: id_customer_address, id_customer_address_book.
• Table foreign key column needs to follow the fk_[remote_entity] format. Examples: fk_customer_address, fk_customer_address_book. If the same table is referred multiple times, follow-up foreign key columns need to be named as fk_[custom_connection_name].
• Table names need to follow the following format:

Guidelines

• PhpName is usually the CamelCase version of the “SQL name”, for example—<table name="spy_customer" phpName="SpyCustomer">.
• A module, like the Product module, may inject columns into a table which belongs to another module, like the Url module. This usually happens if the direction of a relation is opposed to the direction of the dependency. For this scenario, the injector module contains a separate foreign module schema definition file. For example, the Product module contains spy_url.schema.xml next to spy_product.schema.xml that defines the injected columns into the Url domain. See the following examples.
• The database element’s package and namespace attributes are used during class generation and control the placement and namespace of generated files.

Examples

<?xml version="1.0"?>
<database xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="zed" xsi:noNamespaceSchemaLocation="http://static.spryker.com/schema-01.xsd" namespace="Orm\Zed\ConfigurableBundle\Persistence" package="src.Orm.Zed.ConfigurableBundle.Persistence">
    <table name="spy_configurable_bundle_template">
        <column name="id_configurable_bundle_template" required="true" type="INTEGER" autoIncrement="true" primaryKey="true"/>
        <column name="uuid" required="false" type="VARCHAR" size="255"/>
        <column name="name" required="true" type="VARCHAR" size="255"/>
        <column name="is_active" required="true" default="false" type="BOOLEAN"/>

        <unique name="spy_configurable_bundle_template-uuid">
            <unique-column name="uuid"/>
        </unique>

        <index name="index-spy_configurable_bundle_template-name">
            <index-column name="name"/>
        </index>

        <behavior name="uuid">
            <parameter name="key_columns" value="id_configurable_bundle_template"/>
        </behavior>

        <behavior name="timestampable"/>

        <id-method-parameter value="spy_configurable_bundle_template_pk_seq"/>
    </table>
</database>

Injecting columns from Product to the Url domain by defining the spy_url.schema.xml schema file in the Product module.

<?xml version="1.0"?>
<database xmlns="spryker:schema-01" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="zed" xsi:schemaLocation="spryker:schema-01 https://static.spryker.com/schema-01.xsd" namespace="Orm\Zed\Url\Persistence" package="src.Orm.Zed.Url.Persistence">

    <table name="spy_url">
        <column name="fk_product_abstract" type="INTEGER"/>
        <foreign-key name="spy_url-fk_product_abstract" foreignTable="spy_product_abstract" phpName="SpyProduct" onDelete="CASCADE">
            <reference foreign="id_product_abstract" local="fk_product_abstract"/>
        </foreign-key>
    </table>

</database>

Provider / Router

[Organization]
└── Yves
    └── [Module]  
        └── Plugin
            ├── Provider
            │   └── [Name]ControllerProvider.php
            └── [ConsumerModule]
                └── [RouterName]Plugin.php

Providers and Routers are used for bootstrapping the Yves application.

• Controller Provider: registers Yves Controllers of a module and binds them to a path.
• Router: resolves a path into an Yves Controller and Action.

Controllers in the Zed application layer are autowired and don’t require a manual registration. An ExampleController::indexAction() in ExampleModule can be accessed via the /example-module/example/index URI.

Conventions

• A Controller Provider needs to extend \SprykerShop\Yves\ShopApplication\Plugin\Provider\AbstractYvesControllerProvider.
• A Router needs to extend \SprykerShop\Yves\ShopRouter\Plugin\Router\AbstractRouter.
• A providers are routers are classified as a Plugin so the plugin’s conventions apply.
• Providers and routers are classified as plugins so the Plugin’s conventions apply.

Query Object

src
├── Orm
│   └── Zed   
│       └── [DomainName]   
│           ├── Base
│           │   └── [EntityName]Query.php
│           └── [EntityName]Query.php
│
└── [Organisation]
    └── Zed
        └── [ModuleName]
            └── Persistence
                └── Propel
                    └── Abstract[EntityName]Query.php

Enables to write queries to the related table in an SQL engine agnostic way. Query Objects can be instantiated and used only from the Repository and Entity Manager of the definer module or modules.

For more information, see the following:

• Query class in the Propel docs
• More details on the 3-tier class hierarchy in Entity, and domains in Persistence Schema.

Conventions

No general conventions.

Examples

In the following example, the SpyProductQuery is part of the Product domain, while SpyUrl belongs to Url domain, and SpyProductComment belongs to ProductComment domain.

  /**
   * @module Url,ProductComment
   */
  public function exampleMethod()
  {
      $query = $this->getFactory()->getProductQuery();
      $query
        ->joinSpyUrl()
        ->joinSpyProductComment();
      ...
  }

Repository

[Organization]
└── Zed
    └── [Module]
        └── Persistence
            ├── [Module]Repository.php      
            └── [Module]RepositoryInterface.php

Retrieves data from the database by executing queries and returns the results as Transfer Objects or native types. The Repository can be accessed from the same module’s Communication and Business layers.

Conventions

No general conventions.

Guidelines

No general guidelines.

Theme

[Organization]
└── Yves
    └── [Module]
        └── Theme
            └── ["default"|theme]
                ├── components
                │   │── organisms
                │   │   └── [organism-name]
                │   │       └── [organism-name].twig
                │   │── atoms
                │   │   └── [atom-name]
                │   │       └── [atom-name].twig
                │   └── molecules
                │       └── [molecule-name]
                │           └── [molecule-name].twig
                ├── templates
                │   ├── page-layout-[page-layout-name]
                │   │   └── page-layout-[page-layout-name].twig
                │   └── [template-name]
                │       └── [template-name].twig                
                └── views
                    └── [name-of-controller]
                        └── [name-of-action].twig    

Yves application layer can have one or multiple themes that define the overall look and feel.

Spryker implements the concept of atomic web design.

Yves application layer provides only one-level theme inheritance: current theme > default theme. A Theme may contain views, templates, and components.

• Current theme: a single theme defined on a project level. Examples: b2b-theme, b2c-theme.
• Default theme: a theme provided by default and used in the boilerplate implementations. Used for incremental project updates, that is starting from default and changing frontend components one by one. Also used for a graceful fallback if the core delivers a new functionality that doesn’t have own frontend in a project.
• Views are the templates for Controllers and Widgets.
• Templates are reusable templates like page Layouts.
• Components are reusable parts of the UI, further divided into atoms, molecules, and organisms.

Transfer Object

src
├── Generated
│   └── Shared
│       └── Transfer
│           ├── [EntityName]EntityTransfer.php
│           └── [Name]Transfer.php
└── [Organisation]
    └── Shared
        └── [Module]
            └── Transfer
                └── [module_name].transfer.xml   

Transfer Objects are pure data transfer objects (DTO) with getters and setters. They can be used in all applications and all layers. Business transfer objects are described in module specific XML files and then auto-generated into the src/Generated/Shared/Transfer directory.

For every defined table in Peristence Schema, a matching EntityTransfer Transfer Object is generated with the EntityTransfer suffix. EntityTransfers are the lightweight DTO representations of the Entities, so Entity Transfers should be used primarily during layer or module overarching communication.

Conventions

• Transfer Objects need to be defined in the transfer XML file.
• The Attributes transfer name suffix is reserved for Glue API modules, that is modules with the RestApi suffix, and must not be used for other purposes to avoid collision.
• The ApiAttributes transfer name suffix is reserved for Storefront API modules, that is modules with the Api suffix, and must not be used for other purposes to avoid collision.
• The BackendApiAttributes transfer name suffix is reserved for Backend API modules, that is modules with BackendApi suffix, and must not be used for other purposes to avoid collision.
• EntityTransfers must not be defined manually. It’s generated automatically based on the Peristence Schema definitions.
  • The Entity suffix is reserved for the auto-generated EntityTransfers and must not be used in manual transfer definitions to avoid collision.

Guidelines

Transfer Objects can be directly instantiated everywhere, not just via Factory.

Examples

• BAPI resource names: PickingListsBackendApiAttributes for picking list, PickingListItemsBackendApiAttributes for picking list items.
• SAPI resource names: PickingListsApiAttributes for picking list, PickingListItemsApiAttributes for picking list items.

<?xml version="1.0"?>
<transfers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="spryker:transfer-01" xsi:schemaLocation="spryker:transfer-01 http://static.spryker.com/transfer-01.xsd">

    <transfer name="ConfigurableBundleTemplate">
        <property name="idConfigurableBundleTemplate" type="int"/>
        <property name="uuid" type="string"/>
        <property name="name" type="string"/>
        <property name="isActive" type="bool"/>
        <property name="translations" type="ConfigurableBundleTemplateTranslation[]" singular="translation"/>
        <property name="productImageSets" type="ProductImageSet[]" singular="productImageSet"/>
    </transfer>
</transfers>

Widget

[Organization]
└── Yves
    └── [Module]
        ├── Plugin
        │   └── [ConsumerModule]
        │       ├── [PluginName]Plugin.php
        │       └── [RouterName]Plugin.php      
        └── Widget
            └── [Name]Widget.php

A Widget is a reusable part of a webpage in the Yves application layer. Widgets provide functionality in a decoupled, modular, and configurable way.

Conventions

• A Widget needs to have a unique name across all features.

Guidelines

• Widget modules can contain frontend components, like templates, atoms, molecules, or organisms, without defining an actual Widget class.
• The Widget class receives the input or rendering parameters via its constructor.

Examples

namespace SprykerShop\Yves\CurrencyWidget\Widget;

class CurrencyWidget extends \Spryker\Yves\Kernel\Widget\AbstractWidget
{
    public function __construct()
    {
        $this->addParameter('currencies', $this->getCurrencies())
            ->addParameter('currentCurrency', $this->getCurrentCurrency());
    }

    public static function getName(): string
    {
        return 'CurrencyWidget';
    }

    public static function getTemplate(): string
    {
        return '@CurrencyWidget/views/currency-switcher/currency-switcher.twig';
    }

    /**
     * @return array<\Generated\Shared\Transfer\CurrencyTransfer>
     */
    protected function getCurrencies(): array
    {
        $currencyClient = $this->getFactory()->getCurrencyClient();
        $availableCurrencyCodes = $currencyClient->getCurrencyIsoCodes();

        $currencies = [];
        foreach ($availableCurrencyCodes as $currency) {
            $currencies[$currency] = $currencyClient->fromIsoCode($currency);
        }

        return $currencies;
    }

    protected function getCurrentCurrency(): string
    {
        return $this->getFactory()->getCurrencyClient()->getCurrent()->getCodeOrFail();
    }
}

Zed Stub

[Organization]
└── Client
    └── [Module]
        └── Zed
            ├── [Module]Stub.php
            └── [Module]StubInterface.php

A Zed Stub is a class that defines interactions between Yves with Glue application layers and Zed application layer. Under the hood, the Zed Stub makes RPC calls to Zed application layer.

Conventions

• The Zed Stub call’s endpoints need to be implemented in a Zed application Gateway Controller of the receiving module.
• Zed Stubs need to be a descendant of \Spryker\Client\ZedRequest\Stub\ZedRequestStub.

Examples

namespace Spryker\Client\ConfigurableBundleCartsRestApi\Zed;

class ConfigurableBundleCartsRestApiZedStub implements ConfigurableBundleCartsRestApiZedStubInterface
{
    /**
     * @var \Spryker\Client\ConfigurableBundleCartsRestApi\Dependency\Client\ConfigurableBundleCartsRestApiToZedRequestClientInterface
     */
    protected $zedRequestClient;

    public function __construct(ConfigurableBundleCartsRestApiToZedRequestClientInterface $zedRequestClient)
    {
        $this->zedRequestClient = $zedRequestClient;
    }

    /**
     * @uses \Spryker\Zed\ConfigurableBundleCartsRestApi\Communication\Controller\GatewayController::addConfiguredBundleAction()
     *
     * @param \Generated\Shared\Transfer\CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer
     *
     * @return \Generated\Shared\Transfer\QuoteResponseTransfer
     */
    public function addConfiguredBundle(CreateConfiguredBundleRequestTransfer $createConfiguredBundleRequestTransfer): QuoteResponseTransfer
    {
        /** @var \Generated\Shared\Transfer\QuoteResponseTransfer $quoteResponseTransfer */
        $quoteResponseTransfer = $this->zedRequestClient->call(
            '/configurable-bundle-carts-rest-api/gateway/add-configured-bundle',
            $createConfiguredBundleRequestTransfer,
        );

        return $quoteResponseTransfer;
    }

Core module development components

The following components are used in core module development to ensure modularity and customizability. For project development and module development, these components are recommended. Consider implementing these components based on their relevance to your business or technical requirements.

Conventions

• Components must be placed according to the corresponding application layer’s directory architecture to take effect.
• The components must inherit from the application layer’s corresponding abstract class in Kernel module to take effect.

Guidelines

• Components should be stateless to be deterministic and easy to comprehend.

Bridge

[Organization]
├── Zed
│   └── [Module]
│       └── Dependency
│           ├── Client
│           │   ├── [Module]To[Module]ClientBridge.php
│           │   └── [Module]To[Module]ClientInterface.php          
│           ├── Facade
│           │   ├── [Module]To[Module]FacadeBridge.php
│           │   └── [Module]To[Module]FacadeInterface.php
│           ├── Service
│           │   ├── [Module]To[Module]ServiceBridge.php
│           │   └── [Module]To[Module]ServiceInterface.php    
│           └── QueryContainer
│               ├── [Module]To[Module]QueryContainerBridge.php
│               └── [Module]To[Module]QueryContainerInterface.php    
├── Yves
│   └── [Module]             
│       └── Dependency
│           ├── Client
│           │   ├── [Module]To[Module]ClientBridge.php
│           │   └── [Module]To[Module]ClientInterface.php
│           └── Service
│               ├── [Module]To[Module]ServiceBridge.php
│               └── [Module]To[Module]ServiceInterface.php      
├── Glue
│   └── [Module]    
│       └── Dependency
│           ├── Client
│           │   ├── [Module]To[Module]ClientBridge.php
│           │   └── [Module]To[Module]ClientInterface.php
│           ├── Facade
│           │   ├── [Module]To[Module]FacadeBridge.php
│           │   └── [Module]To[Module]FacadeInterface.php
│           ├── Service
│           │   ├── [Module]To[Module]ServiceBridge.php
│           │   └── [Module]To[Module]ServiceInterface.php    
│           └── QueryContainer
│               ├── [Module]To[Module]QueryContainerBridge.php
│               └── [Module]To[Module]QueryContainerInterface.php    
└── Client
    └── [Module]      
        └── Dependency
            ├── Client
            │   ├── [Module]To[Module]ClientBridge.php
            │   └── [Module]To[Module]ClientInterface.php
            └── Service
                ├── [Module]To[Module]ServiceBridge.php
                └── [Module]To[Module]ServiceInterface.php  

According to the Interface Segregation Principle, every module defines an interface for each external class it relies on. To decouple and encapsulate these dependencies effectively, Bridges are used. These Bridges serve to wrap dependencies such as Facade, Client, Service, external library classes, and more. By doing so, a module explicitly declares its own requirements, enabling any class that implements the interface to be used. This approach facilitates seamless module decoupling, allowing both modules to evolve independently while maintaining a high degree of flexibility and maintainability.

Conventions

• The Bridge class needs to define and implement an interface that holds the specification of each public method. Mind the missing bridge suffix word in the interface name.

Guidelines

• Bridge versus adapter: for simplification, we keep using bridge pattern even when adapting the earlier version of a core facade. Adapters are used when the remote class’ life cycle is independent to the core or there is a huge technical difference between the adaptee and adaptor.
• During Bridge definitions, type definition mistakes in remote facades become more visible. In these cases, be aware of the cascading effect of changing or restricting an argument type in facades when you consider such changes.
• QueryContainer and Facade dependencies are available only in the Glue application layers that have access to the database.

Examples

namespace Spryker\Zed\Product\Business;

interface ProductFacadeInterface
{
    public function addProduct(ProductAbstractTransfer $productAbstractTransfer, array $productConcreteCollection): int;
}

namespace Spryker\Zed\ProductApi\Dependency\Facade;

class ProductApiToProductBridge implements ProductApiToProductInterface
{
  /**
   * @var \Spryker\Zed\Product\Business\ProductFacadeInterface
   */
  protected $productFacade;

  public function __construct($productFacade)
  {
    $this->productFacade = $productFacade;
  }

  public function addProduct(ProductAbstractTransfer $productAbstractTransfer, array $productConcreteCollection): int
  {
    return $this->productFacade->addProduct($productAbstractTransfer, $productConcreteCollection);
  }
}

Plugin

[Organization]
├── Zed
│   ├── [Module]
│   │    └── Communication
│   │        └── Plugin
│   │            └── [ConsumerModule]
│   │                └── [PluginName]Plugin.php
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
├── Yves
│   ├── [Module]
│   │   └── Plugin
│   │       └── [ConsumerModule]
│   │           └── [PluginName]Plugin.php
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
├── Glue
│   ├── [Module]
│   │   └── Plugin
│   │       └── [ConsumerModule]
│   │           └── [PluginName]Plugin.php    
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
└── Client
    ├── [Module]        
    │   └── Plugin
    │       └── [ConsumerModule]
    │           └── [PluginName]Plugin.php    
    └── [ConsumerModule]Extension
        └── Dependency
            └── Plugin
                └── [PluginInterfaceName]PluginInterface.php

• Plugins are classes that are used to realize Inversion Of Control: instead of a direct call to another module’s facade, a plugin can be provided as an optional and configurable class.
• Plugins are the only classes that can be instantiated across modules, normally via the Dependency Provider.

See more details about the implementation in Plugin Interface component, and instantiation in Dependency Provider.

Conventions

No general conventions.

Guidelines

Plugin class name should be unique and give and overview about the behavior the Plugin delivers. Consider developers searching for a Plugin in a catalog across all features only by a plugin class name.

Examples

  /**
    * @see /F/Q/N/FooDependencyProvider::getFooPlugins()
    * @see /F/Q/N/BarDependencyProvider::getBarPlugins()
    */
  class ZipZapPlugin extends AbstractPlugin implements FooPluginInterface, BarPluginInterface {}

Plugin Interface

[Organization]
├── Zed
│   ├── [Module]
│   │    └── Communication
│   │        └── Plugin
│   │            └── [ConsumerModule]
│   │                └── [PluginName]Plugin.php
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
├── Yves
│   ├── [Module]
│   │   └── Plugin
│   │       └── [ConsumerModule]
│   │           └── [PluginName]Plugin.php
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
├── Glue
│   ├── [Module]
│   │   └── Plugin
│   │       └── [ConsumerModule]
│   │           └── [PluginName]Plugin.php    
│   └── [ConsumerModule]Extension
│       └── Dependency
│           └── Plugin
│               └── [PluginInterfaceName]PluginInterface.php
│
└── Client
    ├── [Module]        
    │   └── Plugin
    │       └── [ConsumerModule]
    │           └── [PluginName]Plugin.php    
    └── [ConsumerModule]Extension
        └── Dependency
            └── Plugin
                └── [PluginInterfaceName]PluginInterface.php

Description

• Modules which consume Plugins need to define their requirements with an interface.
• The Plugin Interface needs to be placed in an extension module.

There are three modules involved:

1. Plugin definer (aka extension module): The module that defines and holds the Plugin Interface (example: CompanyPostCreatePluginInterface in CompanyExtension module).
2. Plugin executor: The module that uses the Plugin(s) in its Dependency Provider thus provides extension point (example: CompanyDependencyProvider::getCompanyPostCreatePlugins() in Company module)
3. Plugin providers: The modules that implement a Plugin thus provide extension for the given extension point (example: CompanyBusinessUnitCreatePlugin in CompanyBusinessUnit module)

Conventions

No general conventions.

Guidelines

• Operations on single items in plugin stack methods is not feasible, except for the following reasons:
  • it is strictly and inevitably a single-item flow.
  • the items go in FIFO order and there is no other way to use a collection instead.
• Plugin interface class specification should explain:
  • how the Plugins will be used,
  • what are the typical use-cases of a Plugin.

Example

<?php

namespace Spryker\Zed\PickingListExtension\Dependency\Plugin;

use Generated\Shared\Transfer\PickingListCollectionTransfer;

/**
 * Provides an ability to expand `PickingListCollectionTransfer` with additional data.
 *
 * Implement this plugin interface to expand `PickingListCollectionTransfer` after the fetching picking list data from the persistence.
 */
interface PickingListCollectionExpanderPluginInterface
{
    /**
     * Specification:
     * - Expands `PickingListCollectionTransfer` with an additional data.
     *
     * @api
     *
     * @param \Generated\Shared\Transfer\PickingListCollectionTransfer $pickingListCollectionTransfer
     *
     * @return \Generated\Shared\Transfer\PickingListCollectionTransfer
     */
    public function expand(PickingListCollectionTransfer $pickingListCollectionTransfer): PickingListCollectionTransfer;
}