/// <summary>
/// Implements <see cref="INotificationFormatter"/>
/// Delayed notification. In our demo handled by <see cref="IftttNotificationProvider"/>.
/// </summary>
/// <param name="notifications">Notifications to send out.</param>
/// <param name="recipient">Recipient of the notification. Transformed and filtered by <see cref="IftttNotificationProvider"/>.</param>
/// <param name="format">Parameters for supported format by <see cref="IftttNotificationProvider"/></param>
/// <param name="channelName">Channel name, but we only support one so it's ignored here.</param>
/// <returns>The formatted messages.</returns>
public IEnumerable <FormatterNotificationMessage> FormatMessages(
IEnumerable <FormatterNotificationMessage> notifications,
string recipient,
NotificationFormat format,
string channelName)
{
// Join messages with the same content.
var groupedMessages = notifications.GroupBy(x => x.Content);
foreach (var group in groupedMessages)
{
// Get the serialized content data
var data = _objectSerializer.Deserialize <TweetedPageViewModel>(group.Last().Content);
// Respect the provider's Format.
var content = $@"Your article ""{data.PageName}"" has {data.ShareCount} shares!";
if (format.MaxLength.HasValue)
{
content = content.Substring(0, Math.Min(content.Length, format.MaxLength.Value));
}
// Mark all ID's as processed (otherwise the dispatcher will try again with them)
var messageIds = group.SelectMany(y => y.ContainedIDs);
var formattedMessage = new FormatterNotificationMessage(messageIds)
{
Content = content
};
yield return(formattedMessage);
}
}
public IEnumerable<FormatterNotificationMessage> FormatMessages(
IEnumerable<FormatterNotificationMessage> notifications,
string recipient,
NotificationFormat format,
string notificationChannelName)
{
// we do not want to change the messages, so we just return them as they are
// but you have the possibility to group several messages into one if you would like to
return notifications;
}
/// <summary>
/// Performs formatting of messages.
/// </summary>
/// <param name="notifications">Messages to format</param>
/// <param name="recipient">The receiver of the message</param>
/// <param name="format">The format to format to</param>
/// <param name="channelName">The message channel</param>
/// <returns>A list of formatted messages</returns>
/// <remarks>One use case for a formatter might be to combine several messages into one.</remarks>
public IEnumerable <FormatterNotificationMessage> FormatMessages(IEnumerable <FormatterNotificationMessage> notifications, string recipient, NotificationFormat format, string channelName)
{
return(notifications);
}
