Add entity field in planning form

ajax/planning.php

@@ -94,6 +94,49 @@
     }
 }
 
+if ($_REQUEST["action"] == "get_externalevent_entity") {
+    $key = 'entities_id';
+    if (
+        isset($_POST[$key])
+        && $_POST[$key] >= 0
+    ) {
+        if ($item = getItemForItemtype(PlanningExternalEvent::getType())) {
+            Html::header_nocache();
+            header("Content-Type: text/html; charset=UTF-8");
+            $data = [];
+            foreach ($_POST["data"] as $d) {
+                $data[$d['name']] = $d['value'];
+            }
+            if (isset($data['plan[begin]']) && isset($data['plan[_duration]'])) {
+                $data['begin'] = $data['plan[begin]'];
+                $data['duration'] = $data['plan[_duration]'];
+                $data['end'] = date("Y-m-d H:i:s", strtotime($data['begin']) + $data['duration']);
+            }
+            if (isset($data['planningexternaleventtemplates_id']) && $data['planningexternaleventtemplates_id'] > 0 && !(new PlanningExternalEventTemplate())->find(['id' => $data['planningexternaleventtemplates_id'], 'entities_id' => $_POST[$key]])) {
+                $_SESSION['saveInput'][$item->getType()] = ['begin' => $data['begin'], 'duration' => $data['duration'], 'end' => $data['end']];
+            }else {
+                $_SESSION['saveInput'][$item->getType()] = $data;
+            }
+
+            $item->showForm('', [
+                'from_planning_ajax' => true,
+                'begin'              => $params['begin'] ?? "",
+                'end'                => $params['end'] ?? "",
+                'res_itemtype'       => $params['res_itemtype'] ?? "",
+                'res_items_id'       => $params['res_items_id'] ?? "",
+                'entities_id'        => $_POST[$key],
+                'rand_reminder'      => $_POST['rand'],
+                'formoptions'        => "id='ajax_reminder" . $_POST['rand'] . "'"
+            ]);
+            $callback = "glpi_close_all_dialogs();
+                      GLPIPlanning.refresh();
+                      displayAjaxMessageAfterRedirect();";
+            Html::ajaxForm("#ajax_reminder" . $_POST['rand'], $callback);
+        }
+        return;
+    }
+}
+
 Html::header_nocache();
 header("Content-Type: text/html; charset=UTF-8");
 

src/Planning.php

@@ -1302,6 +1302,7 @@ public static function showAddEventSubForm($params = [])
                 'res_itemtype'       => $params['res_itemtype'],
                 'res_items_id'       => $params['res_items_id'],
                 'form_id'            => "ajax_reminder$rand",
+                'rand_reminder'      => $rand
             ]);
             $callback = "glpi_close_all_dialogs();
                       GLPIPlanning.refresh();

src/PlanningExternalEvent.php

@@ -163,6 +163,8 @@ public function showForm($ID, array $options = [])
             $this->fields['users_id'] =  $options['res_items_id'];
         }
 
+        $this->fields['entities_id'] = isset($options['entities_id']) ? (int)$options['entities_id']:-1;
+
         if ($is_ajax && $is_rrule) {
             $options['candel'] = false;
             $options['addbuttons'] = [];
@@ -185,6 +187,8 @@ public function showForm($ID, array $options = [])
             }
         }
 
+        if (!is_array($this->fields['users_id_guests'])) $this->post_getFromDB();
+
         TemplateRenderer::getInstance()->display('pages/assistance/planning/external_event.html.twig', [
             'item' => $this,
             'rand' => $rand,

templates/pages/assistance/planning/external_event.html.twig

@@ -45,6 +45,31 @@
         {% endif %}
     {% endmacro %}
 
+    {{ fields.dropdownField('Entity', 'entities_id', item.fields['entities_id'], 'Entity'|itemtype_name, {
+        'display_emptychoice': true,
+        'required': true,
+        rand: rand,
+        on_change: 'entity_update' ~ rand ~ '(this.value)'
+    }|merge(field_options)) }}
+
+    <script>
+        function entity_update{{ rand }}(value) {
+            formdata = $('[name="asset_form"]').serializeArray();
+            $.ajax({
+                url: "{{ path('ajax/planning.php')|e('js') }}",
+                type: "POST",
+                data: {
+                    action: 'get_externalevent_entity',
+                    entities_id: value,
+                    data: formdata,
+                    rand: {{ params.rand_reminder }}
+                }
+            }).done(function(data) {
+                    $("#ajax_reminder{{ params.rand_reminder }}").html(data);
+            });
+        }
+    </script>
+
     {% if params.canedit %}
         {{ fields.dropdownField(
             'PlanningExternalEventTemplate',