Generate case entity. (Called CaseEntity because "Case" is reserved word)

modules/zencrm_entities/src/Form/CaseEntityDeleteForm.php

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+<?php
+
+namespace Drupal\zencrm_entities\Form;
+
+use Drupal\Core\Entity\ContentEntityDeleteForm;
+
+/**
+ * Provides a form for deleting Case entity entities.
+ *
+ * @ingroup zencrm_entities
+ */
+class CaseEntityDeleteForm extends ContentEntityDeleteForm {
+
+
+}

modules/zencrm_entities/src/Form/CaseEntityForm.php

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+<?php
+
+namespace Drupal\zencrm_entities\Form;
+
+use Drupal\Core\Entity\ContentEntityForm;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Form controller for Case entity edit forms.
+ *
+ * @ingroup zencrm_entities
+ */
+class CaseEntityForm extends ContentEntityForm {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    /* @var $entity \Drupal\zencrm_entities\Entity\CaseEntity */
+    $form = parent::buildForm($form, $form_state);
+
+    $entity = $this->entity;
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save(array $form, FormStateInterface $form_state) {
+    $entity = $this->entity;
+
+    $status = parent::save($form, $form_state);
+
+    switch ($status) {
+      case SAVED_NEW:
+        drupal_set_message($this->t('Created the %label Case entity.', [
+          '%label' => $entity->label(),
+        ]));
+        break;
+
+      default:
+        drupal_set_message($this->t('Saved the %label Case entity.', [
+          '%label' => $entity->label(),
+        ]));
+    }
+    $form_state->setRedirect('entity.case_entity.canonical', ['case_entity' => $entity->id()]);
+  }
+
+}

modules/zencrm_entities/src/Form/CaseEntitySettingsForm.php

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+<?php
+
+namespace Drupal\zencrm_entities\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Class CaseEntitySettingsForm.
+ *
+ * @ingroup zencrm_entities
+ */
+class CaseEntitySettingsForm extends FormBase {
+
+  /**
+   * Returns a unique string identifying the form.
+   *
+   * @return string
+   *   The unique string identifying the form.
+   */
+  public function getFormId() {
+    return 'caseentity_settings';
+  }
+
+  /**
+   * Form submission handler.
+   *
+   * @param array $form
+   *   An associative array containing the structure of the form.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    // Empty implementation of the abstract submit class.
+  }
+
+  /**
+   * Defines the settings form for Case entity entities.
+   *
+   * @param array $form
+   *   An associative array containing the structure of the form.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   *
+   * @return array
+   *   Form definition array.
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $form['caseentity_settings']['#markup'] = 'Settings form for Case entity entities. Manage field settings here.';
+    return $form;
+  }
+
+}

modules/zencrm_entities/src/Form/CaseEntityTypeDeleteForm.php

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+<?php
+
+namespace Drupal\zencrm_entities\Form;
+
+use Drupal\Core\Entity\EntityConfirmFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
+
+/**
+ * Builds the form to delete Case entity type entities.
+ */
+class CaseEntityTypeDeleteForm extends EntityConfirmFormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getQuestion() {
+    return $this->t('Are you sure you want to delete %name?', ['%name' => $this->entity->label()]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCancelUrl() {
+    return new Url('entity.case_entity_type.collection');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfirmText() {
+    return $this->t('Delete');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    $this->entity->delete();
+
+    drupal_set_message(
+      $this->t('content @type: deleted @label.',
+        [
+          '@type' => $this->entity->bundle(),
+          '@label' => $this->entity->label(),
+        ]
+        )
+    );
+
+    $form_state->setRedirectUrl($this->getCancelUrl());
+  }
+
+}

modules/zencrm_entities/src/Form/CaseEntityTypeForm.php

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+<?php
+
+namespace Drupal\zencrm_entities\Form;
+
+use Drupal\Core\Entity\EntityForm;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Class CaseEntityTypeForm.
+ */
+class CaseEntityTypeForm extends EntityForm {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function form(array $form, FormStateInterface $form_state) {
+    $form = parent::form($form, $form_state);
+
+    $case_entity_type = $this->entity;
+    $form['label'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Label'),
+      '#maxlength' => 255,
+      '#default_value' => $case_entity_type->label(),
+      '#description' => $this->t("Label for the Case entity type."),
+      '#required' => TRUE,
+    ];
+
+    $form['id'] = [
+      '#type' => 'machine_name',
+      '#default_value' => $case_entity_type->id(),
+      '#machine_name' => [
+        'exists' => '\Drupal\zencrm_entities\Entity\CaseEntityType::load',
+      ],
+      '#disabled' => !$case_entity_type->isNew(),
+    ];
+
+    /* You will need additional form elements for your custom properties. */
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save(array $form, FormStateInterface $form_state) {
+    $case_entity_type = $this->entity;
+    $status = $case_entity_type->save();
+
+    switch ($status) {
+      case SAVED_NEW:
+        drupal_set_message($this->t('Created the %label Case entity type.', [
+          '%label' => $case_entity_type->label(),
+        ]));
+        break;
+
+      default:
+        drupal_set_message($this->t('Saved the %label Case entity type.', [
+          '%label' => $case_entity_type->label(),
+        ]));
+    }
+    $form_state->setRedirectUrl($case_entity_type->toUrl('collection'));
+  }
+
+}