From 2f5e12c495b6702c53f5d308f1a54e51689722c0 Mon Sep 17 00:00:00 2001
From: orakili <github@orakili.net>
Date: Wed, 10 Apr 2024 21:25:49 +0000
Subject: [PATCH] fix: replace non-working Drupal form state logic with custom
 one to show/hide the OCHA product field when OCHA is selected

Refs: RW-934
---
 .../src/Services/ReportFormAlter.php          | 38 ++++++-------------
 .../reliefweb_form/js/widget.autocomplete.js  | 25 ++++++++++++
 2 files changed, 36 insertions(+), 27 deletions(-)

diff --git a/html/modules/custom/reliefweb_entities/src/Services/ReportFormAlter.php b/html/modules/custom/reliefweb_entities/src/Services/ReportFormAlter.php
index c5546f64d..be44f632c 100644
--- a/html/modules/custom/reliefweb_entities/src/Services/ReportFormAlter.php
+++ b/html/modules/custom/reliefweb_entities/src/Services/ReportFormAlter.php
@@ -249,10 +249,21 @@ public function validateOriginFields(array $form, FormStateInterface &$form_stat
    * Ensure only 1 OCHA product is selectable and that it's mandatory when OCHA
    * is selected as source or hidden otherwise.
    *
+   * Note: the OCHA product field is only displayed when OCHA is selected, in
+   * which case the field is also marked as required. This is handled by the
+   * `reliefweb_form/widget.autocomplete` library in the `handleSources()`
+   * function because Drupal form states don't provide a way to apply a state
+   * when a value is among a list of selected values. Only exact matchs are
+   * supported in Drupal 10.2.5.
+   *
    * @param array $form
    *   Form to alter.
    * @param \Drupal\Core\Form\FormStateInterface $form_state
    *   Form state.
+   *
+   * @see https://www.drupal.org/project/drupal/issues/1149078
+   * @see https://humanitarian.atlassian.net/browse/RW-934
+   * @see reliefweb_form/widget.autocomplete
    */
   protected function alterOchaProductField(array &$form, FormStateInterface $form_state) {
     $widget = &$form['field_ocha_product']['widget'];
@@ -264,33 +275,6 @@ protected function alterOchaProductField(array &$form, FormStateInterface $form_
       FormHelper::removeOptions($form, 'field_ocha_product', [12351]);
     }
 
-    /* Temporarily disabled on 2024/04/12.
-     *
-     * The changes from https://www.drupal.org/project/drupal/issues/1149078
-     * are not compatible with the way "reliefweb_form/drupal.states" compared
-     * values in the array.
-     * Drupal checks exact match between the values of the state condition and
-     * the selected values of the form element while our library was just
-     * checking that the values of the state condition were in the list of the
-     * selected values.
-     * Drupal doesn't currently have a way to handle this use case so to avoid
-     * issues we always display the OCHA product field.
-     * It's ignored when OCHA is not one of the selected sources and is
-     * mandatory if selected.
-     *
-     * @see ::validateOchaProductField()
-     *
-     * // Only display the OCHA product when OCHA is selected.
-     * $condition = [
-     *  'select[name="field_source[]"]' => ['value' => ['1503']],
-     * ];
-     * // We put the visibility state on the container to avoid styling issues
-     * // with the surrounding elements but we need to to put the required state
-     * // on the widget element for it to work properly.
-     * $form['field_ocha_product']['#states']['visible'] = $condition;
-     * $widget['#states']['required'] = $condition;
-     */
-
     // Remove the empty option.
     unset($widget['#options']['_none']);
 
diff --git a/html/modules/custom/reliefweb_form/js/widget.autocomplete.js b/html/modules/custom/reliefweb_form/js/widget.autocomplete.js
index 95f5aacd9..b70983eee 100644
--- a/html/modules/custom/reliefweb_form/js/widget.autocomplete.js
+++ b/html/modules/custom/reliefweb_form/js/widget.autocomplete.js
@@ -450,12 +450,37 @@
           // Retrieve the list of selected sources without an already loaded
           // attention message.
           var selected = [];
+          var ochaSelected = false;
           var options = sourceElement.getElementsByTagName('option');
           for (var i = 0, l = options.length; i < l; i++) {
             var option = options[i];
             if (option.selected && !option.hasAttribute('data-message')) {
               selected.push(option.value);
             }
+            // Check if OCHA (id 1503) is selected.
+            if (option.selected && option.value == 1503) {
+              ochaSelected = true;
+            }
+          }
+
+          // Show/hide the OCHA product field based on whether OCHA is selected
+          // as source or not. We cannot use Drupal form states for that because
+          // they don't provide a way to apply a state when a value in among a
+          // list of selected values. Only exact matches are supported in Drupal
+          // 10.2.5.
+          // @see https://www.drupal.org/project/drupal/issues/1149078
+          // @see https://humanitarian.atlassian.net/browse/RW-934
+          var ochaProduct = document.querySelector('[data-drupal-selector="edit-field-ocha-product-wrapper"]');
+          if (ochaProduct) {
+            var ochaProductOptional = ochaProduct.querySelector('.form-optional');
+            if (ochaSelected) {
+              ochaProduct.removeAttribute('hidden');
+              ochaProductOptional.setAttribute('hidden', '');
+            }
+            else {
+              ochaProduct.setAttribute('hidden', '');
+              ochaProductOptional.removeAttribute('hidden');
+            }
           }
 
           // Fetch the new data if there are selected sources.