protected void UpdateLink()
{
if (FlightEntry != null)
{
lnkFBAdd.Visible = FlightEntry.CanPost;
lnkFBAdd.NavigateUrl = "~/member/FBPost.aspx".ToAbsoluteURL(Request).ToString() + "?id=" + FlightEntry.FlightID.ToString(System.Globalization.CultureInfo.InvariantCulture);
if (!AddMetaTagHints)
{
return;
}
// Set facebook meta tags
string szDescription = FlightEntry.SocialMediaComment;
AddMeta("og:title", szDescription);
AddMeta("og:type", "website");
AddMeta("og:description", szDescription);
AddMeta("og:url", Request.Url.AbsoluteUri);
AddMeta("fb:app_id", MFBFacebook.FACEBOOK_API_KEY);
MyFlightbook.Image.MFBImageInfo mfbii = FlightEntry.SocialMediaImage();
if (mfbii != null && mfbii.URLFullImage != null && !String.IsNullOrEmpty(mfbii.URLFullImage.ToAbsoluteURL(Request).ToString()))
{
bool fVideo = mfbii.ImageType == MyFlightbook.Image.MFBImageInfo.ImageFileType.S3VideoMP4;
string absolutePath = mfbii.ResolveFullImage();
if (fVideo)
{
string absoluteThumb = mfbii.UriS3VideoThumbnail.ToString();
AddMeta("og:image", absoluteThumb);
AddMeta("og:image:secure_url", absoluteThumb);
AddMeta("og:video", absolutePath);
AddMeta("og:video:secure_url", absolutePath);
AddMeta("og:video:type", "video/mp4");
}
else
{
AddMeta("og:image", absolutePath);
AddMeta("og:image:secure_url", absolutePath);
AddMeta("og:image:type", "image/jpeg");
}
double ratio = (mfbii.WidthThumbnail == 0) ? 1.0 : ((double)mfbii.HeightThumbnail / (double)mfbii.WidthThumbnail);
const int nominalDimension = 400;
int nominalWidth = (int)((ratio < 1) ? nominalDimension : nominalDimension / ratio);
int nominalHeight = (int)((ratio < 1) ? nominalDimension * ratio : nominalDimension);
AddMeta(fVideo ? "og:video:width" : "og:image:width", nominalWidth.ToString(System.Globalization.CultureInfo.InvariantCulture));
AddMeta(fVideo ? "og:video:height" : "og:image:height", nominalHeight.ToString(System.Globalization.CultureInfo.InvariantCulture));
}
}
}
public bool PostToSocialMedia(IPostable o, string szUser, string szHost = null)
{
if (o == null)
{
throw new ArgumentNullException("o");
}
if (!o.CanPost)
{
return(false);
}
if (String.IsNullOrEmpty(szUser))
{
throw new ArgumentNullException("szUser");
}
if (String.IsNullOrEmpty(szHost))
{
szHost = Branding.CurrentBrand.HostName;
}
Profile pf = Profile.GetUser(szUser);
// Check for user not configured
if (pf.FacebookAccessToken == null || String.IsNullOrEmpty(pf.FacebookAccessToken.AccessToken))
{
return(false);
}
// NOTE: We need to update the version code below periodically as the API updates
const string szUrl = "https://graph.facebook.com/v2.10/me/feed";
MultipartFormDataContent form = new MultipartFormDataContent();
Uri uriItem = o.SocialMediaItemUri(szHost);
MyFlightbook.Image.MFBImageInfo img = o.SocialMediaImage(szHost);
// Add in the main parameters:
Dictionary <string, string> dictParams = new Dictionary <string, string>()
{
{ "access_token", pf.FacebookAccessToken.AccessToken },
{ "message", string.Empty }
};
if (uriItem != null)
{
dictParams.Add("link", uriItem.AbsoluteUri);
}
if (img != null)
{
dictParams.Add("picture", img.URLFullImage.ToAbsoluteURL("http", Branding.CurrentBrand.HostName).ToString());
}
foreach (string key in dictParams.Keys)
{
StringContent sc = new StringContent(dictParams[key]);
sc.Headers.ContentDisposition = (new System.Net.Http.Headers.ContentDispositionHeaderValue("form-data")
{
Name = key
});
sc.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("text/plain")
{
CharSet = "ISO-8859-1"
};
form.Add(sc);
}
// The remainder can run on a background thread, since we don't do anything that requires a result from here.
new System.Threading.Thread(() =>
{
using (HttpClient httpClient = new HttpClient())
{
try
{
HttpResponseMessage response = httpClient.PostAsync(new Uri(szUrl), form).Result;
string szResult = response.Content.ReadAsStringAsync().Result;
if (response.IsSuccessStatusCode)
{
// do a refresh, to extend as much as possible
if (MFBFacebook.ExchangeToken(pf.FacebookAccessToken))
{
pf.FCommit();
}
}
else
{
HandleFBFailure(szUser, szResult);
}
}
catch (MyFlightbookException) { }
catch (System.ArgumentNullException) { }
finally
{
form.Dispose();
}
}
}).Start();
return(true);
}
