Add SendingTaskSubscribers endpoint

lib/API/JSON/v1/SendingTaskSubscribers.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace MailPoet\API\JSON\v1;
+
+use MailPoet\Listing;
+use MailPoet\Cron\CronHelper;
+use MailPoet\Config\AccessControl;
+use MailPoet\Models\ScheduledTask;
+use MailPoet\Models\SendingQueue;
+use MailPoet\API\JSON\Error as APIError;
+use MailPoet\Settings\SettingsController;
+use MailPoet\WP\Functions as WPFunctions;
+use MailPoet\Tasks\Sending as SendingTask;
+use MailPoet\API\JSON\Endpoint as APIEndpoint;
+
+if (!defined('ABSPATH')) exit;
+
+class SendingTaskSubscribers extends APIEndpoint {
+  public $permissions = array(
+    'global' => AccessControl::PERMISSION_MANAGE_EMAILS
+  );
+
+  /** @var Listing\Handler */
+  private $listing_handler;
+
+  /** @var SettingsController */
+  private $settings;
+
+  /** @var WPFunctions */
+  private $wp;
+
+  public function __construct(
+    Listing\Handler $listing_handler,
+    SettingsController $settings,
+    WPFunctions $wp
+  ) {
+    $this->listing_handler = $listing_handler;
+    $this->settings = $settings;
+    $this->wp = $wp;
+  }
+
+  public function listing($data = array()) {
+    $newsletter_id = !empty($data['params']['id']) ? (int)$data['params']['id'] : false;
+    $tasks_ids = SendingQueue::select('task_id')
+      ->where('newsletter_id', $newsletter_id)
+      ->findArray();
+    if (empty($tasks_ids)) {
+      return $this->errorResponse(array(
+        APIError::NOT_FOUND => __('This newsletter is not being sent to any subcriber yet.', 'mailpoet')
+      ));
+    }
+    $data['params']['task_ids'] = array_map(function($item) {
+      return $item['task_id'];
+    }, $tasks_ids);
+    $listing_data = $this->listing_handler->get('\MailPoet\Models\ScheduledTaskSubscriber', $data);
+
+    $items = [];
+    foreach ($listing_data['items'] as $item) {
+      $items[] = $item->asArray();
+    }
+
+    return $this->successResponse($items, array(
+      'count' => $listing_data['count'],
+      'filters' => $listing_data['filters'],
+      'groups' => $listing_data['groups'],
+      'mta_log' => $this->settings->get('mta_log'),
+      'mta_method' => $this->settings->get('mta.method'),
+      'cron_accessible' => CronHelper::isDaemonAccessible(),
+      'current_time' => $this->wp->currentTime('mysql')
+    ));
+  }
+}