/// <summary>
/// Parses a Facebook feed
/// </summary>
public static FacebookFeed ParseFeed(JToken token, Dictionary<ulong, FacebookUser> people)
{
FacebookFeed result = new FacebookFeed();
// Get id, time and actors (source and target)
result.ID = (string)token["post_id"];
result.Date = GeneralUtils.UnixTimestampToDateTime((Int64)token["created_time"]);
if (tokenHasValue(token["actor_id"]))
result.SourceUser = people[(UInt64)token["actor_id"]];
if (tokenHasValue(token["target_id"]))
result.TargetUser = people[(UInt64)token["target_id"]];
// Get the core message
if (tokenHasValue(token["message"]))
{
// Get the message tags, null if no tags
result.MessageTags = getTags(token["message_tags"]);
// Format our message
result.Message = removeTabs((string)token["message"]);
result.XmlMessage = RichTextBoxParser.
ParseStringToXamlWithTags(result.Message, result.MessageTags);
result.HasMessage = true; // Used for binding message visibility
}
// Description + Description tags + xmal description
if (tokenHasValue(token["description"]))
{
// Get description tags, null if no tags
result.DescriptionTags = getTags(token["description_tags"]);
// Format description
result.Description = (string)token["description"];
result.XmlDescription = RichTextBoxParser.
ParseStringToXamlWithTags(result.Description, result.DescriptionTags, true);
}
#region Facebook Properties (Like, Comment, Share)
FacebookItem fbItem = new FacebookItem();
// Likes
if (tokenHasValue(token["likes"]["count"]))
{
fbItem.LikesCount = (int)token["likes"]["count"];
// Grab friend likes
IList<FacebookUser> flikes = new List<FacebookUser>();
foreach (JToken person in token["likes"]["friends"].Children())
{
FacebookUser likedUser = null;
people.TryGetValue((ulong)person, out likedUser);
if (likedUser != null)
flikes.Add(people[(ulong)person]);
}
if (flikes.Count > 0)
fbItem.FriendLikes = flikes;
}
// Comments
if (tokenHasValue(token["comments"]["count"]))
{
fbItem.CommentsCount = (int)token["comments"]["count"];
// Grab some comments
List<FacebookComment> comments = new List<FacebookComment>();
foreach (JToken comment in token["comments"]["comment_list"])
comments.Add(ParseFacebookComment(comment, ref people));
if (comments.Count > 0)
fbItem.Comments = comments;
}
result.SocialProperties = fbItem;
#endregion
#region Facebook Attachment
// Attachment
if (tokenHasValue(token["attachment"]) && token.HasValues)
{
FacebookAttachment fbAttach = new FacebookAttachment();
JToken attachment = token["attachment"];
// Figure out attachment type, href and name
fbAttach.Type = FacebookAttachment.MediaType.Link; // Defaults to Link type
if (tokenHasValue(attachment["href"]))
fbAttach.Source = new Uri((string)attachment["href"]);
if (tokenHasValue(attachment["name"]))
fbAttach.Name = removeTabs((string)attachment["name"]);
// Adjust values if we have some media in the attachment
if (tokenHasValue(attachment["media"]) && attachment["media"].HasValues)
{
// We only use the first media for now
JToken media = attachment["media"][0];
// Adjust type
if (tokenHasValue(media["type"]))
{
string type = (string)media["type"];
if (type.Equals("photo")) fbAttach.Type = FacebookAttachment.MediaType.Image;
else if (type.Equals("link")) fbAttach.Type = FacebookAttachment.MediaType.Link;
// TODO: Treat videos as links for now
else if (type.Equals("video")) fbAttach.Type = FacebookAttachment.MediaType.Link;
else fbAttach.Type = FacebookAttachment.MediaType.NotSupported;
}
// Add Src
if (tokenHasValue(media["src"]))
{
fbAttach.Icon = new Uri((string)media["src"]);
}
// Use media href instead of attachment href
if (tokenHasValue(media["href"]))
{
fbAttach.Source = new Uri((string)media["href"]);
// Adjust source if attachment is a facebook image
if (fbAttach.Type == FacebookAttachment.MediaType.Image)
fbAttach.Source = guessLargeImageFromIcon(fbAttach.Icon);
}
// Add description if this attachment is a link
if (fbAttach.Type == FacebookAttachment.MediaType.Link &&
tokenHasValue(attachment["description"]))
fbAttach.Description = GeneralUtils.TrimWords((string)attachment["description"], maxLinkLength);
}
// Add this attachment to our feed if the attachment is valid (has a source)
if (fbAttach.Source != null)
result.Attachment = fbAttach;
}
#endregion
// Finally add the current feedtype
if (token["typle"] != null)
result.FeedType = DetermineFacebookFeedType(result, (int)token["type"]);
// Ignore any type of feeds that we currently do not support
if ((result.Attachment != null && result.Attachment.Type == FacebookAttachment.MediaType.NotSupported) ||
(result.Message == null && result.Description == null && result.Attachment == null))
return null;
return result;
}
/// <summary>
/// Guess the type of the facebook feed from the content is has
/// </summary>
private static FeedType DetermineFacebookFeedType(FacebookFeed feed, int type)
{
FeedType result = FeedType.NotSupported;
// Figure out type from supplied type param
if (type == 56 && feed.TargetUser != null) result = FeedType.Conversation;
else if ((type == 80 || type == 128 || type == 247) &&
feed.Attachment != null) result = FeedType.Attachment;
else if (type == 46 || feed.Message != null) result = FeedType.Text;
else result = FeedType.Action;
return result;
}
