E-Mail Contacts list for Sending Reports

library/Reporting/Hook/EmailProviderHook.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Icinga\Module\Reporting\Hook;
+
+use Icinga\Application\Hook;
+
+abstract class EmailProviderHook
+{
+    /**
+     * Get all Contact eMails
+     *
+     * @return array
+     */
+    abstract public function getContactEmails(): array;
+
+    /**
+     * @return array
+     */
+    final public static function getProviders(): array
+    {
+        return Hook::all('Reporting/EmailProvider');
+    }
+}

library/Reporting/Web/Forms/SendForm.php

@@ -6,15 +6,18 @@
 
 use Icinga\Module\Reporting\Actions\SendMail;
 use Icinga\Module\Reporting\Database;
+use Icinga\Module\Reporting\Hook\EmailProviderHook;
 use Icinga\Module\Reporting\ProvidedReports;
 use Icinga\Module\Reporting\Report;
 use Icinga\Module\Reporting\Web\Forms\Decorator\CompatDecorator;
+use ipl\I18n\Translation;
 use ipl\Web\Compat\CompatForm;
 
 class SendForm extends CompatForm
 {
     use Database;
     use ProvidedReports;
+    use Translation;
 
     /** @var Report */
     protected $report;
@@ -32,6 +35,33 @@ protected function assemble()
 
         (new SendMail())->initConfigForm($this, $this->report);
 
+        $this->addElement('radio', 'source_radio', [
+            'label'   => $this->translate('E-Mail Source'),
+            'options' => [
+                'manual'   => $this->translate('Manual input'),
+                'contacts' => $this->translate('Contacts'),
+            ],
+            'value'   => 'contacts',
+            'class'   => 'autosubmit'
+        ]);
+
+        if ($this->getPopulatedValue('source_radio', 'contacts') === 'contacts') {
+            $emails = [null => $this->translate('Select Contacts')];
+            foreach (EmailProviderHook::getProviders() as $provider) {
+                $emails = array_merge($emails, $provider->getContactEmails());
+            }
+
+            $this->addElement('select', 'emails_list', [
+                'multiple' => true,
+                'label'    => $this->translate('Contacts'),
+                'options'  => $emails
+            ]);
+        } else {
+            $this->addElement('textarea', 'emails_manual', [
+                'label' => $this->translate('Contact E-Mails')
+            ]);
+        }
+
         $this->addElement('submit', 'submit', [
             'label' => $this->translate('Send Report')
         ]);