initial app skeleton with sample drupal modules for testing

.gitignore

+dist/*
+node_modules/*
+!drupal/
+drupal/*
+!drupal/modules/
+drupal/modules/*
+!drupal/modules/epal/
+!drupal/modules/epalreadydata/
+
+# Logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Sass cache folder
+.sass-cache
+
+# Users Environment Variables
+npm-debug*
+# bower_components
+
+# Project reference
+# typings
+

drupal/modules/epal/composer.json

+{
+  "name": "drupal/epal",
+  "type": "drupal-module",
+  "description": "EPAL Registration",
+  "keywords": ["Drupal"],
+  "license": "GPL-2.0+",
+  "homepage": "https://www.drupal.org/project/epal",
+  "minimum-stability": "dev",
+  "support": {
+    "issues": "https://www.drupal.org/project/issues/epal",
+    "source": "http://cgit.drupalcode.org/epal"
+  },
+  "require": { }
+}

drupal/modules/epal/epal.info.yml

+name: epal
+type: module
+description: EPAL Registration
+core: 8.x
+package: epal

drupal/modules/epal/epal.links.action.yml

+entity.epal_student.add_form:
+  route_name: entity.epal_student.add_form
+  title: 'Add EPAL Student'
+  appears_on:
+    - entity.epal_student.collection
+entity.epal_student_class.add_form:
+  route_name: entity.epal_student_class.add_form
+  title: 'Add EPAL Student Class'
+  appears_on:
+    - entity.epal_student_class.collection

drupal/modules/epal/epal.links.menu.yml

+
+# EPAL Student menu items definition
+entity.epal_student.collection:
+  title: 'EPAL Student list'
+  route_name: entity.epal_student.collection
+  description: 'List EPAL Student entities'
+  parent: system.admin_epal
+  weight: 100
+
+epal_student.admin.structure.settings:
+  title: EPAL Student settings
+  description: 'Configure EPAL Student entities'
+  route_name: epal_student.settings
+  parent: system.admin_structure
+
+# EPAL Student Class menu items definition
+entity.epal_student_class.collection:
+  title: 'EPAL Student Class list'
+  route_name: entity.epal_student_class.collection
+  description: 'List EPAL Student Class entities'
+  parent: system.admin_epal
+  weight: 100
+
+epal_student_class.admin.structure.settings:
+  title: EPAL Student Class settings
+  description: 'Configure EPAL Student Class entities'
+  route_name: epal_student_class.settings
+  parent: system.admin_structure

drupal/modules/epal/epal.links.task.yml

+# EPAL Student routing definition
+epal_student.settings_tab:
+  route_name: epal_student.settings
+  title: 'Settings'
+  base_route: epal_student.settings
+
+entity.epal_student.canonical:
+  route_name: entity.epal_student.canonical
+  base_route: entity.epal_student.canonical
+  title: 'View'
+
+entity.epal_student.edit_form:
+  route_name: entity.epal_student.edit_form
+  base_route: entity.epal_student.canonical
+  title: 'Edit'
+
+entity.epal_student.delete_form:
+  route_name:  entity.epal_student.delete_form
+  base_route:  entity.epal_student.canonical
+  title: Delete
+  weight: 10
+
+# EPAL Student Class routing definition
+epal_student_class.settings_tab:
+  route_name: epal_student_class.settings
+  title: 'Settings'
+  base_route: epal_student_class.settings
+
+entity.epal_student_class.canonical:
+  route_name: entity.epal_student_class.canonical
+  base_route: entity.epal_student_class.canonical
+  title: 'View'
+
+entity.epal_student_class.edit_form:
+  route_name: entity.epal_student_class.edit_form
+  base_route: entity.epal_student_class.canonical
+  title: 'Edit'
+
+entity.epal_student_class.delete_form:
+  route_name:  entity.epal_student_class.delete_form
+  base_route:  entity.epal_student_class.canonical
+  title: Delete
+  weight: 10
+

drupal/modules/epal/epal.module

+<?php
+
+/**
+ * @file
+ * Contains epal.module.
+ */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+
+/**
+ * Implements hook_help().
+ */
+function epal_help($route_name, RouteMatchInterface $route_match) {
+  switch ($route_name) {
+    // Main module help for the epal module.
+    case 'help.page.epal':
+      $output = '';
+      $output .= '<h3>' . t('About') . '</h3>';
+      $output .= '<p>' . t('EPAL Registration') . '</p>';
+      return $output;
+
+    default:
+  }
+}
+
+/**
+ * Implements hook_theme().
+ */
+function epal_theme() {
+  return [
+    'epal' => [
+      'template' => 'epal',
+      'render element' => 'children',
+    ],
+  ];
+}

drupal/modules/epal/epal.permissions.yml

+add epal student entities:
+  title: 'Create new EPAL Student entities'
+
+administer epal student entities:
+  title: 'Administer EPAL Student entities'
+  description: 'Allow to access the administration form to configure EPAL Student entities.'
+  restrict access: true
+
+delete epal student entities:
+  title: 'Delete EPAL Student entities'
+
+edit epal student entities:
+  title: 'Edit EPAL Student entities'
+
+access epal student overview:
+  title: 'Access the EPAL Student overview page'
+
+view published epal student entities:
+  title: 'View published EPAL Student entities'
+
+view unpublished epal student entities:
+  title: 'View unpublished EPAL Student entities'
+add epal student class entities:
+  title: 'Create new EPAL Student Class entities'
+
+administer epal student class entities:
+  title: 'Administer EPAL Student Class entities'
+  description: 'Allow to access the administration form to configure EPAL Student Class entities.'
+  restrict access: true
+
+delete epal student class entities:
+  title: 'Delete EPAL Student Class entities'
+
+edit epal student class entities:
+  title: 'Edit EPAL Student Class entities'
+
+access epal student class overview:
+  title: 'Access the EPAL Student Class overview page'
+
+view published epal student class entities:
+  title: 'View published EPAL Student Class entities'
+
+view unpublished epal student class entities:
+  title: 'View unpublished EPAL Student Class entities'

drupal/modules/epal/epal_student.page.inc

+<?php
+
+/**
+ * @file
+ * Contains epal_student.page.inc.
+ *
+ * Page callback for EPAL Student entities.
+ */
+
+use Drupal\Core\Render\Element;
+
+/**
+ * Prepares variables for EPAL Student templates.
+ *
+ * Default template: epal_student.html.twig.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - elements: An associative array containing the user information and any
+ *   - attributes: HTML attributes for the containing element.
+ */
+function template_preprocess_epal_student(array &$variables) {
+  // Fetch EpalStudent Entity Object.
+  $epal_student = $variables['elements']['#epal_student'];
+
+  // Helpful $content variable for templates.
+  foreach (Element::children($variables['elements']) as $key) {
+    $variables['content'][$key] = $variables['elements'][$key];
+  }
+}

drupal/modules/epal/epal_student_class.page.inc

+<?php
+
+/**
+ * @file
+ * Contains epal_student_class.page.inc.
+ *
+ * Page callback for EPAL Student Class entities.
+ */
+
+use Drupal\Core\Render\Element;
+
+/**
+ * Prepares variables for EPAL Student Class templates.
+ *
+ * Default template: epal_student_class.html.twig.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - elements: An associative array containing the user information and any
+ *   - attributes: HTML attributes for the containing element.
+ */
+function template_preprocess_epal_student_class(array &$variables) {
+  // Fetch EpalStudentClass Entity Object.
+  $epal_student_class = $variables['elements']['#epal_student_class'];
+
+  // Helpful $content variable for templates.
+  foreach (Element::children($variables['elements']) as $key) {
+    $variables['content'][$key] = $variables['elements'][$key];
+  }
+}

drupal/modules/epal/src/Entity/EpalStudentClass.php

+<?php
+
+namespace Drupal\epal\Entity;
+
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\user\UserInterface;
+
+/**
+ * Defines the EPAL Student Class entity.
+ *
+ * @ingroup epal
+ *
+ * @ContentEntityType(
+ *   id = "epal_student_class",
+ *   label = @Translation("EPAL Student Class"),
+ *   handlers = {
+ *     "view_builder" = "Drupal\Core\Entity\EntityViewBuilder",
+ *     "list_builder" = "Drupal\epal\EpalStudentClassListBuilder",
+ *     "views_data" = "Drupal\epal\Entity\EpalStudentClassViewsData",
+ *     "translation" = "Drupal\epal\EpalStudentClassTranslationHandler",
+ *
+ *     "form" = {
+ *       "default" = "Drupal\epal\Form\EpalStudentClassForm",
+ *       "add" = "Drupal\epal\Form\EpalStudentClassForm",
+ *       "edit" = "Drupal\epal\Form\EpalStudentClassForm",
+ *       "delete" = "Drupal\epal\Form\EpalStudentClassDeleteForm",
+ *     },
+ *     "access" = "Drupal\epal\EpalStudentClassAccessControlHandler",
+ *     "route_provider" = {
+ *       "html" = "Drupal\epal\EpalStudentClassHtmlRouteProvider",
+ *     },
+ *   },
+ *   base_table = "epal_student_class",
+ *   data_table = "epal_student_class_field_data",
+ *   translatable = TRUE,
+ *   admin_permission = "administer epal student class entities",
+ *   entity_keys = {
+ *     "id" = "id",
+ *     "label" = "name",
+ *     "uuid" = "uuid",
+ *     "uid" = "user_id",
+ *     "langcode" = "langcode",
+ *     "status" = "status",
+ *     "minno" = "minno",
+ *     "maxno" = "maxno",
+ *   },
+ *   links = {
+ *     "canonical" = "/admin/epal/epal_student_class/{epal_student_class}",
+ *     "add-form" = "/admin/epal/epal_student_class/add",
+ *     "edit-form" = "/admin/epal/epal_student_class/{epal_student_class}/edit",
+ *     "delete-form" = "/admin/epal/epal_student_class/{epal_student_class}/delete",
+ *     "collection" = "/admin/epal/epal_student_class",
+ *   },
+ *   field_ui_base_route = "epal_student_class.settings"
+ * )
+ */
+class EpalStudentClass extends ContentEntityBase implements EpalStudentClassInterface {
+
+  use EntityChangedTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function preCreate(EntityStorageInterface $storage_controller, array &$values) {
+    parent::preCreate($storage_controller, $values);
+    $values += array(
+      'user_id' => \Drupal::currentUser()->id(),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return $this->get('name')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setName($name) {
+    $this->set('name', $name);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCreatedTime() {
+    return $this->get('created')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setCreatedTime($timestamp) {
+    $this->set('created', $timestamp);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getOwner() {
+    return $this->get('user_id')->entity;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getOwnerId() {
+    return $this->get('user_id')->target_id;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOwnerId($uid) {
+    $this->set('user_id', $uid);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOwner(UserInterface $account) {
+    $this->set('user_id', $account->id());
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isPublished() {
+    return (bool) $this->getEntityKey('status');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setPublished($published) {
+    $this->set('status', $published ? TRUE : FALSE);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMinno() {
+    return $this->get('minno')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setMinno($minno) {
+    $this->set('minno', $minno);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMaxno() {
+    return $this->get('maxno')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setMaxno($maxno) {
+    $this->set('maxno', $maxno);
+    return $this;
+  }
+
+
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
+    $fields = parent::baseFieldDefinitions($entity_type);
+
+    $fields['user_id'] = BaseFieldDefinition::create('entity_reference')
+      ->setLabel(t('Authored by'))
+      ->setDescription(t('The user ID of author of the EPAL Student Class entity.'))
+      ->setRevisionable(TRUE)
+      ->setSetting('target_type', 'user')
+      ->setSetting('handler', 'default')
+      ->setTranslatable(TRUE)
+      ->setDisplayOptions('view', array(
+        'label' => 'hidden',
+        'type' => 'author',
+        'weight' => 0,
+      ))
+      ->setDisplayOptions('form', array(
+        'type' => 'entity_reference_autocomplete',
+        'weight' => 5,
+        'settings' => array(
+          'match_operator' => 'CONTAINS',
+          'size' => '60',
+          'autocomplete_type' => 'tags',
+          'placeholder' => '',
+        ),
+      ))
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayConfigurable('view', TRUE);
+
+    $fields['name'] = BaseFieldDefinition::create('string')
+      ->setLabel(t('Name'))
+      ->setDescription(t('The name of the EPAL Student Class entity.'))
+      ->setSettings(array(
+        'max_length' => 50,
+        'text_processing' => 0,
+      ))
+      ->setDefaultValue('')
+      ->setDisplayOptions('view', array(
+        'label' => 'above',
+        'type' => 'string',
+        'weight' => -4,
+      ))
+      ->setDisplayOptions('form', array(
+        'type' => 'string_textfield',
+        'weight' => -4,
+      ))
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayConfigurable('view', TRUE);
+
+    $fields['status'] = BaseFieldDefinition::create('boolean')
+      ->setLabel(t('Publishing status'))
+      ->setDescription(t('A boolean indicating whether the EPAL Student Class is published.'))
+      ->setDefaultValue(TRUE);
+
+    $fields['created'] = BaseFieldDefinition::create('created')
+      ->setLabel(t('Created'))
+      ->setDescription(t('The time that the entity was created.'));
+
+    $fields['changed'] = BaseFieldDefinition::create('changed')
+      ->setLabel(t('Changed'))
+      ->setDescription(t('The time that the entity was last edited.'));
+
+
+      $fields['maxno'] = BaseFieldDefinition::create('integer')
+          ->setLabel(t('Max Number of Students'))
+          ->setDescription(t('The maximum number of students in class.'))
+          ->setSettings(array(
+            'max_length' => 2,
+            'text_processing' => 0,
+          ))
+          ->setDefaultValue(25)
+          ->setDisplayOptions('view', array(
+            'label' => 'above',
+            'type' => 'integer',
+            'weight' => -4,
+          ))
+          ->setDisplayOptions('form', array(
+            'type' => 'integer',
+            'weight' => -4,
+          ))
+          ->setDisplayConfigurable('form', TRUE)
+          ->setDisplayConfigurable('view', TRUE);
+
+      $fields['minno'] = BaseFieldDefinition::create('integer')
+              ->setLabel(t('Min Number of Students'))
+              ->setDescription(t('The minimum number of students in class.'))
+              ->setSettings(array(
+                'max_length' => 2,
+                'text_processing' => 0,
+              ))
+              ->setDefaultValue(25)
+              ->setDisplayOptions('view', array(
+                'label' => 'above',
+                'type' => 'integer',
+                'weight' => -4,
+              ))
+              ->setDisplayOptions('form', array(
+                'type' => 'integer',
+                'weight' => -4,
+              ))
+              ->setDisplayConfigurable('form', TRUE)
+              ->setDisplayConfigurable('view', TRUE);
+
+
+    return $fields;
+  }
+
+}

drupal/modules/epal/src/Entity/EpalStudentClassInterface.php

+<?php
+
+namespace Drupal\epal\Entity;