Add simple add planting form

farm_crop_plan.links.action.yml

@@ -0,0 +1,5 @@
+farm_crop_plan.add_planting:
+  title: 'Add planting'
+  route_name: farm_crop_plan.add_planting
+  appears_on:
+    - entity.plan.canonical

farm_crop_plan.routing.yml

@@ -26,3 +26,16 @@ farm_crop_plan.timeline_by_location:
           - crop
       delta:
         type: integer
+farm_crop_plan.add_planting:
+  path: /plan/{plan}/planting
+  defaults:
+    _form: Drupal\farm_crop_plan\Form\CropPlanAddPlantingForm
+    _title_callback: Drupal\farm_crop_plan\Form\CropPlanAddPlantingForm::title
+  requirements:
+    _entity_access: plan.update
+  options:
+    parameters:
+      plan:
+        type: entity:plan
+        bundle:
+          - crop

src/Form/CropPlanAddPlantingForm.php

@@ -0,0 +1,170 @@
+<?php
+
+namespace Drupal\farm_crop_plan\Form;
+
+use Drupal\Core\Datetime\DrupalDateTime;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\plan\Entity\PlanInterface;
+use Drupal\plan\Entity\PlanRecord;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Crop plan add planting form.
+ */
+class CropPlanAddPlantingForm extends FormBase {
+
+  /**
+   * Entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected EntityTypeManagerInterface $entityTypeManager;
+
+  /**
+   * CropPlanAddPlantingForm constructor.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   Entity type manager.
+   */
+  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
+    $this->entityTypeManager = $entity_type_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('entity_type.manager'),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return 'farm_crop_plan_add_planting_form';
+  }
+
+  /**
+   * Title callback.
+   *
+   * @param \Drupal\plan\Entity\PlanInterface|null $plan
+   *   The plan entity.
+   *
+   * @return \Drupal\Core\StringTranslation\TranslatableMarkup
+   */
+  public function title(PlanInterface $plan = NULL) {
+    if (empty($plan)) {
+      return $this->t('Add planting');
+    }
+    return $this->t('@plan: Add planting', ['@plan' => $plan->label()]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state, PlanInterface $plan = NULL) {
+    if (empty($plan)) {
+      return;
+    }
+    $form_state->set('plan_id', $plan->id());
+
+    $form['plant'] = [
+      '#type' => 'entity_autocomplete',
+      '#title' => $this->t('Plant asset'),
+      '#target_type' => 'asset',
+      '#selection_settings' => [
+        'target_bundles' => ['plant'],
+      ],
+      '#required' => TRUE,
+    ];
+
+    $form['seeding_date'] = [
+      '#type' => 'datetime',
+      '#title' => $this->t('Seeding date'),
+      '#default_value' => new DrupalDateTime('midnight', $this->currentUser()->getTimeZone()),
+      '#required' => TRUE,
+    ];
+
+    $form['transplant_days'] = [
+      '#type' => 'number',
+      '#title' => $this->t('Days to transplant'),
+      '#step' => 1,
+      '#min' => 1,
+      '#max' => 365,
+    ];
+
+    $form['maturity_days'] = [
+      '#type' => 'number',
+      '#title' => $this->t('Days to harvest'),
+      '#step' => 1,
+      '#min' => 1,
+      '#max' => 365,
+    ];
+
+    $form['harvest_days'] = [
+      '#type' => 'number',
+      '#title' => $this->t('Harvest window (days)'),
+      '#step' => 1,
+      '#min' => 1,
+      '#max' => 365,
+    ];
+
+    $form['submit'] = [
+      '#type' => 'submit',
+      '#value' => $this->t('Save'),
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+
+    // Require plant asset.
+    $plant = $form_state->getValue('plant');
+    if (empty($plant)) {
+      $form_state->setErrorByName('plant', $this->t('Select a plant asset.'));
+      return;
+    }
+
+    // Check for existing crop_planting records for the plan and plant.
+    $plan_id = $form_state->get('plan_id');
+    $existing = $this->entityTypeManager->getStorage('plan_record')->getQuery()
+      ->accessCheck(FALSE)
+      ->condition('plan', $plan_id)
+      ->condition('plant', $plant)
+      ->count()
+      ->execute();
+    if ($existing > 0) {
+      $form_state->setErrorByName('plant', $this->t('This plant asset is already added to the plan.'));
+    }
+
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    $plan_id = $form_state->get('plan_id');
+    $plant = $form_state->getValue('plant');
+    $record = PlanRecord::create([
+      'type' => 'crop_planting',
+      'plan' => $plan_id,
+      'plant' => $plant,
+      'seeding_date' => $form_state->getValue('seeding_date')->getTimestamp(),
+      'transplant_days' => $form_state->getValue('transplant_days'),
+      'maturity_days' => $form_state->getValue('maturity_days'),
+      'harvest_days' => $form_state->getValue('harvest_days'),
+    ]);
+    $record->save();
+    $this->messenger()->addMessage($this->t('Added @crop_planting', ['@crop_planting' => $record->label()]));
+    $form_state->setRedirect('entity.plan.canonical', ['plan' => $plan_id]);
+  }
+
+}