newNotifications.js

const userNotificationSettings = userId => {
  const targetUser = Meteor.users.findOne({ _id: userId });

  return notificationType => channel => {
    if (typeof userId !== 'string' ||
      typeof notificationType !== 'string' ||
      typeof channel !== 'string') {
      throw new Meteor.Error('All args must be of type string');
    }

    if (['web', 'sms', 'email'].indexOf(channel) === -1) {
      throw new Meteor.Error('channel should be "web, SMS or email"');
    }

    const notificationChannel = _get(
      targetUser,
      `settings.notifications.disabled.${channel}`,
      []
    );

    // if the notification is disabled return false
    if (notificationChannel.indexOf(notificationType) === -1) {
      return false;
    } else {
      return true;
    }
  };
};

export function userJoinedActivity(activity, user) {
  const coach = Meteor.users.findOne({ _id: activity.coachId });

  const coachNotificationDisabledForChannel =
    userNotificationSettings(activity.coachId)(types.USER_JOINED_ACTIVITY_COACH);
  const userNotificationDisabledForChannel =
    userNotificationSettings(user._id)(types.USER_JOINED_ACTIVITY_USER);

  // Create notification for coach
  if (!userNotificationDisabledForChannel('SMS')) {
    smsHelper.sendText(
      `${user.profile.firstName} har tilmeldt sig ${activity.title}`,
      coach.profile.phoneNumber,
    );
  }

  if (!coachNotificationDisabledForChannel('web')) {
    // Send notification to coach
    Notification.insert({
      createdBy: user._id,
      icon: user.profile.picture,
      targetId: activity.coachId,
      data: activity,
      type: types.USER_JOINED_ACTIVITY_COACH,
      message: `${user.profile.firstName} har tilmeldt sig ${activity.title}`,
      activityId: activity._id
    });
  }
  
  if (!userNotificationDisabledForChannel('web')) {
    // send notification to user
    Notification.insert({
      createdBy: activity.coachId,
      icon: coach.profile.picture,
      targetId: user._id,
      type: types.USER_JOINED_ACTIVITY_USER,
      data: activity,
      message: `Du er nu tilmeldt ${activity.title}`,
      activityId: activity._id
    });
  }
}