- Removes validation of MailChimp API key

- Refactors import class
- Creates new method in Newsletter model to select welcome notifications
  for specific segments
- Updates Step 2 (error) and Step 3 (success) notices
- Gives MenuBootstrap class a comprehensible name

lib/Subscribers/ImportExport/ImportExportFactory.php

@@ -0,0 +1,140 @@
+<?php
+namespace MailPoet\Subscribers\ImportExport;
+
+use MailPoet\Models\CustomField;
+use MailPoet\Models\Segment;
+use MailPoet\Util\Helpers;
+
+class ImportExportFactory {
+  public $action;
+
+  function __construct($action = null) {
+    $this->action = $action;
+  }
+
+  function getSegments($with_confirmed_subscribers = false) {
+    $segments = ($this->action === 'import') ?
+      Segment::getSegmentsWithSubscriberCount() :
+      Segment::getSegmentsForExport($with_confirmed_subscribers);
+    return array_map(function($segment) {
+      if(!$segment['name']) $segment['name'] = __('Not In Segment');
+      if(!$segment['id']) $segment['id'] = 0;
+      return array(
+        'id' => $segment['id'],
+        'name' => $segment['name'],
+        'subscriberCount' => $segment['subscribers']
+      );
+    }, $segments);
+  }
+
+  function getSubscriberFields() {
+    return array(
+      'email' => __('Email'),
+      'first_name' => __('First name'),
+      'last_name' => __('Last name'),
+      'status' => __('Status')
+      // TODO: add additional fields from MP2
+      /*
+            'confirmed_ip' => __('IP address')
+            'confirmed_at' => __('Subscription date')
+      */
+    );
+  }
+
+  function formatSubscriberFields($subscriber_fields) {
+    return array_map(function($field_id, $field_name) {
+      return array(
+        'id' => $field_id,
+        'name' => $field_name,
+        'type' => ($field_id === 'confirmed_at') ? 'date' : null,
+        'custom' => false
+      );
+    }, array_keys($subscriber_fields), $subscriber_fields);
+  }
+
+  function getSubscriberCustomFields() {
+    return CustomField::findArray();
+  }
+
+  function formatSubscriberCustomFields($subscriber_custom_fields) {
+    return array_map(function($field) {
+      return array(
+        'id' => $field['id'],
+        'name' => $field['name'],
+        'type' => $field['type'],
+        'custom' => true
+      );
+    }, $subscriber_custom_fields);
+  }
+
+  function formatFieldsForSelect2(
+    $subscriber_fields,
+    $subscriber_custom_fields) {
+    $actions = ($this->action === 'import') ?
+      array(
+        array(
+          'id' => 'ignore',
+          'name' => __('Ignore column...'),
+        ),
+        array(
+          'id' => 'create',
+          'name' => __('Create new column...')
+        ),
+      ) :
+      array(
+        array(
+          'id' => 'select',
+          'name' => __('Select all...'),
+        ),
+        array(
+          'id' => 'deselect',
+          'name' => __('Deselect all...')
+        ),
+      );
+    $select2Fields = array(
+      array(
+        'name' => __('Actions'),
+        'children' => $actions
+      ),
+      array(
+        'name' => __('System columns'),
+        'children' => $this->formatSubscriberFields($subscriber_fields)
+      )
+    );
+    if($subscriber_custom_fields) {
+      array_push($select2Fields, array(
+        'name' => __('User columns'),
+        'children' => $this->formatSubscriberCustomFields(
+          $subscriber_custom_fields
+        )
+      ));
+    }
+    return $select2Fields;
+  }
+
+  function bootstrap() {
+    $subscriber_fields = $this->getSubscriberFields();
+    $subscriber_custom_fields = $this->getSubscriberCustomFields();
+    $data['segments'] = json_encode($this->getSegments());
+    $data['subscriberFieldsSelect2'] = json_encode(
+      $this->formatFieldsForSelect2(
+        $subscriber_fields,
+        $subscriber_custom_fields
+      )
+    );
+    if($this->action === 'import') {
+      $data['subscriberFields'] = json_encode(
+        array_merge(
+          $this->formatSubscriberFields($subscriber_fields),
+          $this->formatSubscriberCustomFields($subscriber_custom_fields)
+        )
+      );
+      $data['maxPostSizeBytes'] = Helpers::getMaxPostSize('bytes');
+      $data['maxPostSize'] = Helpers::getMaxPostSize();
+    } else {
+      $data['segmentsWithConfirmedSubscribers'] =
+        json_encode($this->getSegments($with_confirmed_subscribers = true));
+    }
+    return $data;
+  }
+}