Subscribe in comments

- added Subscriber::subscribe($user, $segment_ids)
- refactored Router\Subscribers->subscribe() method to account for new method
- added Form\Subscribe class to handle subscription in comments
- updated Basics settings page (changed "list" to "segment")

lib/Models/Subscriber.php

@@ -32,6 +32,65 @@ class Subscriber extends Model {
     return parent::delete();
   }
 
+  function addToSegments(array $segment_ids = array()) {
+    $segments = Segment::whereIn('id', $segment_ids)->findMany();
+    foreach($segments as $segment) {
+      $association = SubscriberSegment::create();
+      $association->subscriber_id = $this->id;
+      $association->segment_id = $segment->id;
+      $association->save();
+    }
+  }
+
+  static function subscribe($subscriber_data = array(), $segment_ids = array()) {
+    if(empty($subscriber_data) or empty($segment_ids)) {
+      return false;
+    }
+
+    $subscriber = static::createOrUpdate($subscriber_data);
+
+    if($subscriber !== false && $subscriber->id() > 0) {
+      $signup_confirmation = Setting::getValue('signup_confirmation', array());
+      $has_signup_confirmation = true;
+      if(array_key_exists('enabled', $signup_confirmation)) {
+        $has_signup_confirmation = filter_var(
+          $signup_confirmation['enabled'],
+          FILTER_VALIDATE_BOOLEAN
+        );
+      }
+
+      // restore deleted subscriber
+      if($subscriber->deleted_at !== NULL) {
+        $subscriber->setExpr('deleted_at', 'NULL');
+      }
+
+      if($has_signup_confirmation === false) {
+        // auto subscribe when signup confirmation is turned off
+        $subscriber->set('status', 'subscribed');
+      } else {
+        // reset status of existing subscribers if signup confirmation
+        // is turned on
+        if($subscriber->isNew() === false) {
+          // existing subscriber
+          if($subscriber->status !== 'subscribed') {
+            $subscriber->set('status', 'unconfirmed');
+          }
+        }
+
+        // send confirmation email to unconfirmed subscribers
+        if($subscriber->status === 'unconfirmed') {
+          // TODO: send signup confirmation email
+        }
+      }
+
+      if($subscriber->save()) {
+        $subscriber->addToSegments($segment_ids);
+      }
+    }
+
+    return $subscriber;
+  }
+
   static function search($orm, $search = '') {
     if(strlen(trim($search) === 0)) {
       return $orm;
@@ -181,17 +240,52 @@ class Subscriber extends Model {
     $subscriber = false;
 
     if(isset($data['id']) && (int)$data['id'] > 0) {
-      $subscriber = self::findOne((int)$data['id']);
+      $subscriber = static::findOne((int)$data['id']);
       unset($data['id']);
     }
 
+    if($subscriber === false && !empty($data['email'])) {
+      $subscriber = static::where('email', $data['email'])->findOne();
+      if($subscriber !== false) {
+        unset($data['email']);
+      }
+    }
+
     if($subscriber === false) {
-      $subscriber = self::create();
+      $subscriber = static::create();
       $subscriber->hydrate($data);
     } else {
       $subscriber->set($data);
     }
 
+    // TODO: Cf
+    /*
+    // custom fields
+    $custom_fields = array();
+    foreach($data as $key => $value) {
+      if(strpos($key, 'cf_') === 0) {
+        $custom_fields[substr($key, 3)] = $value;
+        unset($data[$key]);
+      }
+    }
+
+    // add custom fields
+    if(!empty($custom_fields)) {
+      foreach($custom_fields as $custom_field_id => $value) {
+        if(is_array($value)) {
+          // date
+          $value = mktime(0, 0, 0, $value['month'], $value['day'], $value['year']);
+        }
+        $subscriber_custom_field = SubscriberCustomField::create();
+        $subscriber_custom_field->hydrate(array(
+          'subscriber_id' => $subscriber->id(),
+          'custom_field_id' => $custom_field_id,
+          'value' => $value
+        ));
+        $subscriber_custom_field->save();
+      }
+    }*/
+
     $subscriber->save();
     return $subscriber;
   }