ServiceModels.OgDetails GetOgDetails(HtmlDocument document) {
var returnObject = new ServiceModels.OgDetails();
var titleNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:title']");
if (titleNode != null && titleNode.Attributes["content"] != null) {
returnObject.Title = titleNode.Attributes["content"].Value.Trim();
}
var descriptionNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:description']");
if (descriptionNode != null && descriptionNode.Attributes["content"] != null) {
returnObject.Description = descriptionNode.Attributes["content"].Value.Trim();
}
var siteNameNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:site_name']");
if (siteNameNode != null && siteNameNode.Attributes["content"] != null) {
returnObject.SiteName = siteNameNode.Attributes["content"].Value.Trim();
}
var imageNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:image']");
if (imageNode != null && imageNode.Attributes["content"] != null) {
returnObject.Image = imageNode.Attributes["content"].Value.Trim();
}
if (string.IsNullOrEmpty(returnObject.Title)) {
return null;
}
return returnObject;
}
ServiceModels.OgDetails GetOgDetails(HtmlDocument document)
{
var returnObject = new ServiceModels.OgDetails();
var titleNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:title']");
if (titleNode != null && titleNode.Attributes["content"] != null)
{
returnObject.Title = titleNode.Attributes["content"].Value.Trim();
}
var descriptionNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:description']");
if (descriptionNode != null && descriptionNode.Attributes["content"] != null)
{
returnObject.Description = descriptionNode.Attributes["content"].Value.Trim();
}
var siteNameNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:site_name']");
if (siteNameNode != null && siteNameNode.Attributes["content"] != null)
{
returnObject.SiteName = siteNameNode.Attributes["content"].Value.Trim();
}
var imageNode = document.DocumentNode.SelectSingleNode(@"//meta[@property='og:image']");
if (imageNode != null && imageNode.Attributes["content"] != null)
{
returnObject.Image = imageNode.Attributes["content"].Value.Trim();
// Twitch og:image starts without a protocol.
if (returnObject.Image.StartsWith("//"))
{
returnObject.Image = $"https:{returnObject.Image}";
}
}
if (string.IsNullOrEmpty(returnObject.Title))
{
return(null);
}
return(returnObject);
}
/// <summary>
/// I really should make this async. Load a remote page by URL and attempt to get details about it.
/// </summary>
public async Task <ServiceModels.RemotePageDetails> GetRemotePageDetails(string remoteUrl)
{
var returnResult = new ServiceModels.RemotePageDetails {
Title = remoteUrl,
};
Uri uri;
try {
uri = new Uri(remoteUrl);
}
catch (UriFormatException ex) {
var logUrl = remoteUrl.Substring(0, 255);
Log.LogWarning(ex, $"{nameof(GetRemotePageDetails)} couldn't create a URI from -- {logUrl}");
return(returnResult);
}
var remoteUrlAuthority = uri.GetLeftPart(UriPartial.Authority);
var domain = uri.Host.Replace("/www.", "/").ToLower();
var faviconPath = $"{remoteUrlAuthority}/favicon.ico";
var faviconStoragePath = await CacheFavicon(domain, uri.GetLeftPart(UriPartial.Path), faviconPath);
var document = WebClient.DownloadDocument(remoteUrl);
if (document is null)
{
return(returnResult);
}
var titleTag = document.DocumentNode.SelectSingleNode(@"//title");
if (titleTag != null && !string.IsNullOrEmpty(titleTag.InnerText.Trim()))
{
returnResult.Title = titleTag.InnerText.Trim();
}
if (string.IsNullOrEmpty(faviconStoragePath))
{
var element = document.DocumentNode.SelectSingleNode(@"//link[@rel='shortcut icon']");
if (element != null)
{
faviconPath = element.Attributes["href"].Value.Trim();
faviconStoragePath = await CacheFavicon(domain, uri.GetLeftPart(UriPartial.Path), faviconPath);
}
}
if (string.IsNullOrEmpty(faviconStoragePath))
{
var element = document.DocumentNode.SelectSingleNode(@"//link[@rel='icon']");
if (element != null)
{
faviconPath = element.Attributes["href"].Value.Trim();
faviconStoragePath = await CacheFavicon(domain, uri.GetLeftPart(UriPartial.Path), faviconPath);
}
}
returnResult.Favicon = faviconStoragePath;
ServiceModels.OgDetails ogDetails = null;
if (domain == "warpstorm.com" || domain == "localhost")
{
ogDetails = GetWarpstormOgDetails(remoteUrl);
}
else
{
ogDetails = GetOgDetails(document);
}
if (ogDetails != null)
{
returnResult.Title = ogDetails.Title;
if (!string.IsNullOrEmpty(ogDetails.Description))
{
returnResult.Card += "<blockquote class='card hover-highlight' clickable-link-parent>";
if (!string.IsNullOrEmpty(ogDetails.Image))
{
if (ogDetails.Image.StartsWith("/"))
{
ogDetails.Image = $"{remoteUrlAuthority}{ogDetails.Image}";
}
returnResult.Card += $"<div class='card-image'><img src='{ogDetails.Image}' /></div>";
}
returnResult.Card += "<div>";
returnResult.Card += $"<p class='card-title'><a target='_blank' href='{remoteUrl}'>{returnResult.Title}</a></p>";
var decodedDescription = WebUtility.HtmlDecode(ogDetails.Description);
returnResult.Card += $"<p class='card-description'>{decodedDescription}</p>";
if (string.IsNullOrEmpty(ogDetails.SiteName))
{
returnResult.Card += $"<p class='card-link'><a target='_blank' href='{remoteUrl}'>[Direct Link]</a></p>";
}
else
{
returnResult.Card += $"<p class='card-link'><a target='_blank' href='{remoteUrl}'>[{ogDetails.SiteName}]</a></p>";
}
returnResult.Card += "</div><br class='clear' /></blockquote>";
}
}
if (returnResult.Title.Contains(" - "))
{
StripTitleSiteName(domain, returnResult);
}
return(returnResult);
}
