Magento 2 - An Intro to a Modern PHP-Based System - Northeast PHP 2015

Over 200,000 companies use the Magento 1 platform to power their eCommerce needs. So when they set out to build a major new version, the Magento team had significant pressure to deliver a modern, well-designed PHP-based system. Pulling in some of the best of the PHP world through tools like Composer, phpunit and more, I believe they met that goal. In this talk, we’ll take a look at the design and architecture of Magento 2, including it’s use of dependency injections, interceptors and service contracts to provide numerous ways for developers to extend and customize the system.

Presented at Northeast PHP 2015

Transcript

1. PRESENTED BY
   JOSHUA WARREN
   PRESENTED AT
   NORTHEAST PHP 2015
   Magento 2
   AN INTRODUCTION
   TO A MODERN PHP-
   BASED SYSTEM
   

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2. MY
   EXPERIENCE
   

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3. JoshuaWarren.com
   My Experience
   PHP Developer Since 1999
   Founded Creatuity in 2008
   Focused on the Magento platform
   Magento 2 contributor
   #NEPHP
   

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4. JoshuaWarren.com
   early adopter of both Magento 1
   and Magento 2
   #NEPHP
   

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5. JoshuaWarren.com
   Frequent Magento presenter
   #NEPHP
   

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6. JoshuaWarren.com
   Active member of the
   #RealMagento community
   #NEPHP
   

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7. JoshuaWarren.com
   Involved in feedback and design
   discussions throughout the
   Magento 2 Developer Beta
   #NEPHP
   

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8. JoshuaWarren.com
   Wrote Writing the book on
   Magento 2
   #NEPHP
   

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9. A BRIEF
   HISTORY OF
   MAGENTO
   Photo courtesy of @YoavKutner
   

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10. JoshuaWarren.com
    Magento 1 development began in
    2007 by Varien, a PHP development
    agency.
    #NEPHP
    

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11. JoshuaWarren.com
    In 2007, osCommerce was state of
    the art.
    #NEPHP
    

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12. JoshuaWarren.com
    Cloud-based eCommerce systems
    didn’t exist.
    #NEPHP
    

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13. JoshuaWarren.com
    PHP 5.2 was cutting-edge.
    #NEPHP
    

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14. JoshuaWarren.com
    Composer didn’t exist, and Zend
    Framework 1 was still in early beta.
    #NEPHP
    

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15. JoshuaWarren.com
    Magento 1 was built to resolve the
    pain points of osCommerce.
    #NEPHP
    

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16. JoshuaWarren.com
    Designed to be more flexible and to
    provide standardized ways to
    customize the platform.
    #NEPHP
    

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17. JoshuaWarren.com
    By 2010, Magento had been
    downloaded 1.5 million times.
    #NEPHP
    

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18. JoshuaWarren.com
    Attracted by Magento’s free, open-
    source approach, hundreds of
    thousands of sites were launched
    using Magento 1.
    #NEPHP
    

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19. JoshuaWarren.com
    There’s just one problem…
    #NEPHP
    

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20. JoshuaWarren.com
    Ecommerce development is hard.
    #NEPHP
    

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21. View Slide

22. JoshuaWarren.com
    Lightly documented ecommerce
    development is even harder.
    #NEPHP
    

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24. JoshuaWarren.com
    Varien, now known as Magento Inc,
    is acquired by eBay in 2011.
    #NEPHP
    

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25. JoshuaWarren.com
    Work begins on Magento 2 almost
    immediately.
    #NEPHP
    

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26. JoshuaWarren.com
    Now the most widely-used
    eCommerce platform, powering over
    250,000 sites, expectations are high
    for the Magento 2 team.
    #NEPHP
    

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27. JoshuaWarren.com
    Fewer than 30 commits are made to
    Magento 2 in 2012.
    #NEPHP
    

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28. JoshuaWarren.com
    Internal priorities continue to shift,
    and finally at the end of 2014,
    Magento 2 development is made
    public on Github.
    #NEPHP
    

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29. JoshuaWarren.com
    Magento commits to a release
    schedule for Magento 2, and
    announces the acceptance of pull
    requests.
    #NEPHP
    

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30. JoshuaWarren.com
    devdocs.magento.com launches with
    significant documentation of
    Magento 2.
    #NEPHP
    

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31. JoshuaWarren.com
    Developer Beta is released in
    December 2014; Merchant Beta in
    July 2015
    #NEPHP
    

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32. JoshuaWarren.com
    Production-ready release (‘general
    availability’) scheduled for Q4 2015
    #NEPHP
    

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33. MAGENTO 2
    github.com/magento/magento2
    

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34. JoshuaWarren.com
    Feature parity with Magento 1 +
    UI/UX Improvements + focus on
    resolving technical debt
    #NEPHP
    

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35. JoshuaWarren.com
    Technologies
    #NEPHP
    

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36. JoshuaWarren.com #NEPHP
    Composer
    composer create-project magento/product-community-edition --stability="beta"
    
    

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37. JoshuaWarren.com
    Each Magento 2 module is a
    separate Composer package
    #NEPHP
    

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38. JoshuaWarren.com
    PSR-0 thru PSR-4
    #NEPHP
    

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39. JoshuaWarren.com
    Testing built in from the start.
    phpunit, selenium, JMeter, Jasmine
    #NEPHP
    

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40. JoshuaWarren.com
    magento2/dev/tests/
    #NEPHP
    

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41. JoshuaWarren.com
    HTML5, CSS3, LESS CSS
    Preprocessor, JQuery, RequireJS
    #NEPHP
    

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42. JoshuaWarren.com
    Components from Zend
    Framework 1, Zend Framework 2,
    Symfony
    #NEPHP
    

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43. JoshuaWarren.com
    Technical Architecture
    #NEPHP
    

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44. JoshuaWarren.com
    Presentation Layer, Service Layer,
    Domain Layer, Persistence Layer
    #NEPHP
    

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45. JoshuaWarren.com #NEPHP
    

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46. JoshuaWarren.com
    Presentation Layer - views,
    literally and figuratively
    #NEPHP
    

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47. JoshuaWarren.com
    Service Layer - an intermediary
    between the presentation and
    model layers
    #NEPHP
    

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48. JoshuaWarren.com
    Service layer provides a stable,
    backwards-compatible interface
    and forms the foundation for
    dependency injection.
    #NEPHP
    

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49. JoshuaWarren.com
    Domain layer - business logic,
    including models. Contains the
    implementation of service
    contracts.
    #NEPHP
    

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50. JoshuaWarren.com
    Persistence Layer - resource
    models that perform CRUD
    operations on database tables.
    #NEPHP
    

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51. JoshuaWarren.com
    Some models use a single table,
    others continue to use the
    Entity-Attribute-Value design
    pattern used in Magento 1.
    #NEPHP
    

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52. JoshuaWarren.com
    Design Patterns
    #NEPHP
    

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53. JoshuaWarren.com
    Loose Coupling
    #NEPHP
    

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54. JoshuaWarren.com
    Dependency Injection
    #NEPHP
    

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55. JoshuaWarren.com
    Service Contracts
    #NEPHP
    

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56. JoshuaWarren.com
    Interceptors
    #NEPHP
    

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57. JoshuaWarren.com
    Semantic Versioning
    #NEPHP
    

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58. DEPENDENCY
    INJECTION
    Sorry - no cool photo here, because I don’t like needles…
    

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59. JoshuaWarren.com
    DI is exactly what it sounds like -
    injecting dependencies into the
    objects that need them.
    #NEPHP
    

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60. JoshuaWarren.com
    DI is designed to reduce
    dependencies and promote loose
    coupling
    #NEPHP
    

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61. JoshuaWarren.com
    DI makes unit testing much easier
    #NEPHP
    

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62. JoshuaWarren.com
    Magento 2 uses the Constructor
    Injection pattern of DI
    #NEPHP
    

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63. JoshuaWarren.com
    DI in Magento 2 is handled via XML
    files
    #NEPHP
    

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64. JoshuaWarren.com #NEPHP
    di.xml
    

    type="Magento\Payment\Block\Form" shared="false">
    

    

    
    Magento_SamplePaymentProvider::form/payinstore.phtml
    

    

    

    

    
    

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65. INTERCEPTORS
    

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66. JoshuaWarren.com
    Plugin system based on the
    interceptor pattern
    #NEPHP
    

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67. JoshuaWarren.com
    Calls to almost any module can
    be intercepted and altered
    #NEPHP
    

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68. JoshuaWarren.com
    Vast improvement over the
    rewrite pattern in Magento 1 - no
    more rewrite conflicts
    #NEPHP
    

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69. JoshuaWarren.com #NEPHP
    di.xml
    

    

    

    

    
    

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70. JoshuaWarren.com
    Sort order defines order if
    multiple plugins intercept the
    same item
    #NEPHP
    

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71. JoshuaWarren.com
    Possible to intercept before,
    after and around a function
    #NEPHP
    

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72. JoshuaWarren.com #NEPHP
    ‘Before’ Interceptor
    class Plugin

    {

    public function beforeSetName(\Magento\Catalog\Model\Product $subject, $name)

    {

    return array('(' . $name . ')');

    }

    }
    

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73. JoshuaWarren.com #NEPHP
    ‘After’ Interceptor
    class Plugin

    {

    public function afterGetName(\Magento\Catalog\Model\Product $subject, $result)

    {

    return '|' . $result . '|';

    }

    }
    

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74. JoshuaWarren.com #NEPHP
    ‘Around’ Interceptor
    class Plugin

    {

    public function aroundSave(\Magento\Catalog\Model\Product $subject, \Closure $proceed)

    {

    $this->doSomethingBeforeProductIsSaved();

    $returnValue = $proceed();

    if ($returnValue) {

    $this->postProductToFacebook();

    }

    return $returnValue;

    }

    }
    

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75. SERVICE
    CONTRACTS
    Credit to Allan MacGregor for the Soylent Green joke.
    

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76. JoshuaWarren.com
    Set of interfaces to define the public
    API of a module
    #NEPHP
    

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77. JoshuaWarren.com
    This API is the interface provided to
    other modules to access its
    implementation
    #NEPHP
    

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78. JoshuaWarren.com
    Designed to hide business logic
    behind a stable interface
    #NEPHP
    

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79. JoshuaWarren.com
    Service contracts + semantic
    versioning = minor releases will not
    break existing code
    #NEPHP
    

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80. JoshuaWarren.com
    @deprecated = will be removed
    with the next major version release
    #NEPHP
    

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81. JoshuaWarren.com #NEPHP
    CustomerRepositoryInterface.php
    

    namespace Magento\Customer\Api;

    /**

    * Customer CRUD interface.

    */

    interface CustomerRepositoryInterface

    {

    /**

    * Create customer.

    *

    * @api

    * @param \Magento\Customer\Api\Data\CustomerInterface $customer

    * @param string $passwordHash

    * @return \Magento\Customer\Api\Data\CustomerInterface

    * @throws \Magento\Framework\Exception\InputException If bad input is provided

    * @throws \Magento\Framework\Exception\State\InputMismatchException If the provided email is already used

    * @throws \Magento\Framework\Exception\LocalizedException

    */

    public function save(\Magento\Customer\Api\Data\CustomerInterface $customer, $passwordHash = null);
    

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82. JoshuaWarren.com #NEPHP
    CustomerRepositoryInterface.php
    /**

    * Retrieve customer.

    *

    * @api

    * @param string $email

    * @param int|null $websiteId

    * @return \Magento\Customer\Api\Data\CustomerInterface

    * @throws \Magento\Framework\Exception\NoSuchEntityException If customer with the specified email does not exist.

    * @throws \Magento\Framework\Exception\LocalizedException

    */

    public function get($email, $websiteId = null);

    /**

    * Retrieve customer.

    *

    * @api

    * @param int $customerId

    * @return \Magento\Customer\Api\Data\CustomerInterface

    * @throws \Magento\Framework\Exception\NoSuchEntityException If customer with the specified ID does not exist.

    * @throws \Magento\Framework\Exception\LocalizedException

    */

    public function getById($customerId);

    

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83. JoshuaWarren.com
    Service Contracts include Data
    Interfaces and Service Interfaces
    #NEPHP
    

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84. JoshuaWarren.com
    Data Interfaces return information
    about data entities
    #NEPHP
    

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85. JoshuaWarren.com
    Service Interfaces handle business
    logic
    #NEPHP
    

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86. JoshuaWarren.com
    Three types of service interfaces in
    Magento 2 (so far)
    #NEPHP
    

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87. JoshuaWarren.com
    Repository Interfaces provide access
    to persistent data entities
    #NEPHP
    

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88. JoshuaWarren.com
    CustomerRepositoryInterface,
    AddressRepositoryInterface, etc.
    #NEPHP
    

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89. JoshuaWarren.com
    Repository interfaces contain the
    CRUD operations
    #NEPHP
    

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90. JoshuaWarren.com
    Management interfaces contain
    management functions not related
    to repositories
    #NEPHP
    

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91. JoshuaWarren.com
    Validators, createAccount,
    changePassword, etc
    #NEPHP
    

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92. JoshuaWarren.com
    Metadata interfaces provide meta
    information - primarily about
    custom attributes
    #NEPHP
    

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93. EXTENDING
    MAGENTO 2
    

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94. JoshuaWarren.com
    Create your basic module file
    structure
    #NEPHP
    

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95. JoshuaWarren.com #NEPHP
    App/Code///
    composer.json
    etc/module.xml
    Test/Unit/
    

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96. JoshuaWarren.com #NEPHP
    Composer.json
    {
    "name": "joshuaswarren/sample-module-minimal",
    "description": "A minimal sample Magento 2 module",
    "type": "magento2-module",
    "version": "1.0.0",
    "license": [
    "OSL-3.0",
    "AFL-3.0"
    ],
    "require": {
    "php": "~5.5.0|~5.6.0",
    "magento/magento-composer-installer": "*"
    },
    "extra": {
    "map": [
    [
    "*",
    "joshuaswarren/SampleMinimal"
    ]
    ]
    }
    }
    

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97. JoshuaWarren.com #NEPHP
    etc/module.xml
    
    
    
    
    

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98. JoshuaWarren.com
    Optional config files in etc:
    acl.xml
    config.xml
    di.xml
    webapi.xml
    #NEPHP
    

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99. JoshuaWarren.com
    acl.xml defines new items for
    Magento’s ACL system
    #NEPHP
    

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100. JoshuaWarren.com
     Config.xml adds new
     configuration options
     #NEPHP
     

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101. JoshuaWarren.com
     Webapi.xml defines items to
     expose via the REST or SOAP APIs
     #NEPHP
     

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102. JoshuaWarren.com
     Optional subdirectories in etc:
     adminhtml
     frontend
     webapi_rest
     webapi_soap
     #NEPHP
     

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103. JoshuaWarren.com
     Items in the main etc directory
     apply globally to your extension
     #NEPHP
     

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104. JoshuaWarren.com
     Items in the 4 subdirectories apply
     only to that area - i.e., adminhtml
     only applies to the Magento
     backend
     #NEPHP
     

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105. JoshuaWarren.com
     Optional subdirectories:
     API
     Block
     Controller
     Helper
     Model
     #NEPHP
     

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106. JoshuaWarren.com
     Optional subdirectories:
     Plugin
     Setup
     Ui
     i18n
     view
     #NEPHP
     

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107. JoshuaWarren.com
     API contains any new service
     contracts your extension adds
     #NEPHP
     

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108. JoshuaWarren.com
     Block contains any new template
     blocks your extension adds
     #NEPHP
     

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109. JoshuaWarren.com
     Controller contains your
     extension’s controllers
     #NEPHP
     

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110. JoshuaWarren.com
     Helper contains any helper
     functions that your extension
     needs
     #NEPHP
     

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111. JoshuaWarren.com
     Model contains your extension’s
     models
     #NEPHP
     

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112. JoshuaWarren.com
     Plugin contains any interceptors
     your extension defines
     #NEPHP
     

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113. JoshuaWarren.com
     Setup contains your database
     migrations using Magento’s setup
     script system
     #NEPHP
     

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114. JoshuaWarren.com
     UI is for Magento 2’s new Magento
     UI library
     #NEPHP
     

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115. JoshuaWarren.com
     I18n contains internationalization
     files - CSV files defining the
     translations for your strings
     #NEPHP
     

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116. JoshuaWarren.com
     View contains the views for your
     extension
     #NEPHP
     

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117. JoshuaWarren.com
     If your extension doesn’t need
     one of these items, just omit that
     folder
     #NEPHP
     

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118. JoshuaWarren.com
     Sample: custom shipping method
     to allow for in-store pickup from
     several locations
     #NEPHP
     

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119. JoshuaWarren.com #NEPHP
     Block/System/Config/Form/Field/Locations.php
     namespace Magento\SampleShippingProvider\Block\System\Config\Form\Field;

     use Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray;

     /**

     * Backend system config array field renderer

     */

     class Locations extends AbstractFieldArray

     {

     /**

     * Initialise columns for 'Store Locations'

     *

     * @return void

     */

     protected function _construct()

     {

     $this->addColumn('title',

     ['label' => __('Title'), 'class' => 'validate-no-empty validate-alphanum-with-spaces']);

     $this->addColumn('street',

     ['label' => __('Street Address'), 'class' => 'validate-no-empty validate-alphanum-with-spaces']);

     $this->addColumn('phone',

     ['label' => __('Phone Number'), 'class' => 'validate-no-empty validate-no-empty validate-phoneStrict']);

     $this->addColumn('message',

     ['label' => __('Message'), 'class' => 'validate-no-empty']);

     $this->_addAfter = false;

     parent::_construct();

     }

     }
     

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120. JoshuaWarren.com #NEPHP
     Model/Type/Plugin/Onepage.php [1/2]
     namespace Magento\SampleShippingProvider\Model\Type\Plugin;

     use Magento\Checkout\Model\Type\Onepage as CheckoutOnePage;

     use Magento\SampleShippingProvider\Model\Carrier;

     /**

     * Change Shipping Address to selected Store location address

     */

     class Onepage

     {

     /**

     * @var Carrier

     */

     private $carrier;

     /**

     * @param Carrier $carrier

     */

     public function __construct(Carrier $carrier)

     {

     $this->carrier = $carrier;

     }

     

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121. JoshuaWarren.com #NEPHP
     Model/Type/Plugin/Onepage.php [2/2]
     /**

     * Replace shipping address with pickup location address

     * @param CheckoutOnePage $subject

     * @param array $result

     * @return $this

     */

     public function afterSaveShippingMethod(CheckoutOnePage $subject, array $result)

     {

     if ($result) {

     return $result;

     }

     $quote = $subject->getQuote();

     $shippingAddress = $quote->getShippingAddress();

     $shippingMethod = $shippingAddress->getShippingMethod();

     /**

     * In-Store pickup selected

     * Update Shipping Address

     */

     if (strpos($shippingMethod, $this->carrier->getCarrierCode()) !== false) {

     $locationAddress = $this->carrier->getLocationInfo($shippingMethod);

     $shippingAddress->setCountryId($locationAddress['country_id']);

     $shippingAddress->setRegionId($locationAddress['region_id']);

     $shippingAddress->setPostcode($locationAddress['postcode']);

     $shippingAddress->setCity($locationAddress['city']);

     $shippingAddress->setStreet($locationAddress['street']);

     $shippingAddress->setTelephone($locationAddress['phone']);

     }

     return $result;

     }

     }
     

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122. JoshuaWarren.com #NEPHP
     Model/Carrier.php
     namespace Magento\SampleShippingProvider\Model;

     use Psr\Log\LoggerInterface;

     use Magento\Framework\App\Config\ScopeConfigInterface;

     use Magento\Store\Model\ScopeInterface;

     use Magento\Shipping\Model\Carrier\AbstractCarrier;

     use Magento\Shipping\Model\Carrier\CarrierInterface;

     use Magento\Shipping\Model\Config;

     use Magento\Shipping\Model\Rate\ResultFactory;

     use Magento\Quote\Model\Quote\Address\RateResult\MethodFactory;

     use Magento\Quote\Model\Quote\Address\RateResult\ErrorFactory;

     /**

     * In-Store Pickup shipping model

     */

     class Carrier extends AbstractCarrier implements CarrierInterface

     {

     /**

     * @var string

     */

     protected $_code = 'storepickup';

     /**

     * @var bool

     */

     protected $_isFixed = true;
     … see https://github.com/magento/magento2-samples/blob/master/sample-module-shipping-provider/Model/Carrier.php 

     

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123. JoshuaWarren.com
     In model/carrier.php we implement
     all of the functions a shipping
     carrier must have in Magento 2
     #NEPHP
     

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124. JoshuaWarren.com
     GetAllowedMethods
     CollectRates
     GetLocationInfo
     BuildRateForLocation
     GetLocations
     GetShippingOrigin
     #NEPHP
     

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125. JoshuaWarren.com #NEPHP
     Etc/Adminhtml/System.xml
     

     

     

     In-Store Pickup

     

     Enabled

     Magento\Config\Model\Config\Source\Yesno

     

     Warning: Shipping Origin should be configured to use this method.]]>

     

     

     

     Title

     

     […]
     

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126. JoshuaWarren.com #NEPHP
     Etc/Frontend/di.xml
     

     

     

     

     

     
     

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127. JoshuaWarren.com #NEPHP
     Etc/Config.xml
     

     

     

     

     1

     Magento\SampleShippingProvider\Model\Carrier

     In-Store Pickup

     This shipping method is not available.

     

     

     

     
     

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128. JoshuaWarren.com #NEPHP
     Etc/Module.xml
     

     

     

     
     

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129. JoshuaWarren.com #NEPHP
     Composer.json
     {
     "name": "magento/sample-module-shipping-provider",
     "description": "Demonstrate Shipping Provider",
     "type": "magento2-module",
     "version": "1.0.0",
     "license": [
     "OSL-3.0",
     "AFL-3.0"
     ],
     "require": {
     "php": "~5.5.0|~5.6.0",
     "magento/magento-composer-installer": "*",
     "magento/framework": "~0.74",
     "magento/module-store": "~0.74",
     "magento/module-shipping": "~0.74",
     "magento/module-quote": "~0.74",
     "magento/module-checkout": "~0.74"
     },
     "extra": {
     "map": [
     [
     "*",
     "Magento/SampleShippingProvider"
     ]
     ]
     }
     }
     

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130. JoshuaWarren.com
     We now have a complete,
     functioning in-store-pickup
     shipping extension for Magento 2
     #NEPHP
     

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131. JoshuaWarren.com
     Take a look at the Test/Unit
     directory on Github for tests for
     this extension
     #NEPHP
     

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132. JoshuaWarren.com
     Magento 2 unit testing includes
     mocking, fixtures, etc. -
     everything you need for TDD
     #NEPHP
     

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133. LEARNING
     MORE
     Don’t end up like this guy ->
     

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134. JoshuaWarren.com
     devdocs.magento.com
     magento.stackexchange.com/questions/tagged/magento2
     #NEPHP
     

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135. JoshuaWarren.com
     AlanStorm.com
     AlanKent.me
     CoderOnCode.com
     #NEPHP
     

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136. JoshuaWarren.com
     Upcoming events: Meet Magento
     New York, ZendCon, php[world]
     #NEPHP
     

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137. JoshuaWarren.com
     Programming With Magento 2 coming to
     amazon.com & phparch.com
     #NEPHP
     

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138. Keep in
     Touch!
     joind.in/14737
     @JoshuaSWarren
     JoshuaWarren.com
     Mage2DevBook.com
     

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139. JoshuaWarren.com #NEPHP
     

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