/// <summary>
/// Deserializes the specified json string to a presence object.
/// </summary>
/// <param name="message">Json string to deserialize.</param>
/// <returns></returns>
public static Presence Deserialize(string message)
{
Presence result = new Presence();
if (!String.IsNullOrEmpty(message))
{
var json = message.Replace("\\\\\"", @"""");
json = Regex.Unescape(json);
Match presenceMatch = Regex.Match(json, SUBSCRIPTIONS_PATTERN, RegexOptions.Compiled);
var subscriptions = 0;
if (int.TryParse(presenceMatch.Groups["subscriptions"].Value, out subscriptions))
{
var metadataContent = presenceMatch.Groups["metadata"].Value;
var metadataRegex = new Regex(METADATA_PATTERN, RegexOptions.Compiled);
foreach (Match metadata in metadataRegex.Matches(metadataContent))
{
if (metadata.Groups.Count > 1)
{
var metadataDetailMatch = Regex.Match(metadata.Groups[0].Value, METADATA_DETAIL_PATTERN, RegexOptions.Compiled);
var metadataSubscriptions = 0;
if (int.TryParse(metadataDetailMatch.Groups[2].Value, out metadataSubscriptions))
{
result.Metadata.Add(metadataDetailMatch.Groups[1].Value, metadataSubscriptions);
}
}
}
}
result.Subscriptions = subscriptions;
}
return result;
}
/// <summary>
/// Gets the subscriptions in the specified channel and if active the first 100 unique metadata.
/// </summary>
/// <param name="url">Server containing the presence service.</param>
/// <param name="isCluster">Specifies if url is cluster.</param>
/// <param name="applicationKey">Application key with access to presence service.</param>
/// <param name="authenticationToken">Authentication token with access to presence service.</param>
/// <param name="channel">Channel with presence data active.</param>
/// <param name="callback"><see cref="OnPresenceDelegate"/>Callback with error <see cref="OrtcPresenceException"/> and result <see cref="Presence"/>.</param>
/// <example>
/// <code>
/// client.Presence("http://ortc-developers.realtime.co/server/2.1", true, "myApplicationKey", "myAuthenticationToken", "presence-channel", (error, result) =>
/// {
/// if (error != null)
/// {
/// Console.WriteLine(error.Message);
/// }
/// else
/// {
/// if (result != null)
/// {
/// Console.WriteLine(result.Subscriptions);
///
/// if (result.Metadata != null)
/// {
/// foreach (var metadata in result.Metadata)
/// {
/// Console.WriteLine(metadata.Key + " - " + metadata.Value);
/// }
/// }
/// }
/// else
/// {
/// Console.WriteLine("There is no presence data");
/// }
/// }
/// });
/// </code>
/// </example>
public static void GetPresence(String url, bool isCluster, String applicationKey, String authenticationToken, String channel, OnPresenceDelegate callback)
{
Balancer.GetServerUrl(url, isCluster, applicationKey, (error, server) =>
{
var presenceUrl = String.IsNullOrEmpty(server) ? server : server[server.Length - 1] == '/' ? server : server + "/";
presenceUrl = String.Format("{0}presence/{1}/{2}/{3}", presenceUrl, applicationKey, authenticationToken, channel);
RestWebservice.GetAsync(presenceUrl, (responseError, result) =>
{
if (responseError != null)
{
callback(responseError, null);
}
else
{
Presence presenceData = new Presence();
if (!String.IsNullOrEmpty(result))
{
presenceData = Extensibility.Presence.Deserialize(result);
}
callback(null, presenceData);
}
});
});
}
