public void TestStructuredElements()
{
var @expected = @"<meta property=""og:image"" content=""img1.png""><meta property=""og:image:height"" content=""30""><meta property=""og:image:width"" content=""60"">";
var element = new StructuredMetadata(this.ns, "image", "img1.png");
element.AddProperty(new PropertyMetadata("height", "30"));
element.AddProperty(new PropertyMetadata("width", "60"));
Assert.Equal("img1.png", element);
Assert.Equal(expected, element.ToString());
}
public void TestStructuredElementWithArrayProperty()
{
var @expected = @"<meta property=""og:locale"" content=""es""><meta property=""og:locale:alternate"" content=""es_ES""><meta property=""og:locale:alternate"" content=""es_US"">";
var element = new StructuredMetadata(this.ns, "locale", "es");
element.AddProperty(new PropertyMetadata("alternate", "es_ES"));
element.AddProperty(new PropertyMetadata("alternate", "es_US"));
Assert.Equal("es", element);
Assert.Equal(expected, element.ToString());
Assert.Equal("es", element.Value);
Assert.Equal("es_ES", element.Properties["alternate"][0].Value);
Assert.Equal("es_US", element.Properties["alternate"][1].Value);
}
/// <summary>
/// Parses the HTML.
/// </summary>
/// <param name="result">The result.</param>
/// <param name="content">The content.</param>
/// <param name="validateSpecification">if set to <c>true</c> [validate specification].</param>
/// <returns><see cref="OpenGraph"/>.</returns>
/// <exception cref="OpenGraphNet.InvalidSpecificationException">The parsed HTML does not meet the open graph specification.</exception>
private static OpenGraph ParseHtml(OpenGraph result, string content, bool validateSpecification = false)
{
HtmlDocument document = MakeDocumentToParse(content);
ParseNamespaces(result, document);
HtmlNodeCollection allMeta = document.DocumentNode.SelectNodes("//meta");
var openGraphMetaTags = from meta in allMeta ?? new HtmlNodeCollection(null)
where (meta.Attributes.Contains("property") && MatchesNamespacePredicate(meta.Attributes["property"].Value)) ||
(meta.Attributes.Contains("name") && MatchesNamespacePredicate(meta.Attributes["name"].Value))
select meta;
StructuredMetadata lastElement = null;
foreach (HtmlNode metaTag in openGraphMetaTags)
{
var prefix = GetOpenGraphPrefix(metaTag);
SetNamespace(result, prefix);
if (!result.Namespaces.ContainsKey(prefix))
{
continue;
}
string value = GetOpenGraphValue(metaTag);
string property = GetOpenGraphKey(metaTag);
var cleanProperty = CleanOpenGraphKey(prefix, property);
value = HtmlDecodeUrl(property, value);
if (lastElement != null && lastElement.IsMyProperty(property))
{
lastElement.AddProperty(cleanProperty, value);
}
else if (IsChildOfExistingElement(result.internalOpenGraphData, property))
{
var matchingElement =
result.internalOpenGraphData.First(kvp => kvp.Value.First().IsMyProperty(property));
var element = matchingElement.Value.FirstOrDefault(e => !e.Properties.ContainsKey(cleanProperty));
element?.AddProperty(cleanProperty, value);
}
else
{
lastElement = new StructuredMetadata(result.Namespaces[prefix], cleanProperty, value);
result.AddMetadata(lastElement);
}
}
result.Type = string.Empty;
if (result.internalOpenGraphData.TryGetValue("og:type", out var type))
{
result.Type = (type.FirstOrDefault() ?? new NullMetadata()).Value ?? string.Empty;
}
result.Title = string.Empty;
if (result.internalOpenGraphData.TryGetValue("og:title", out var title))
{
result.Title = (title.FirstOrDefault() ?? new NullMetadata()).Value ?? string.Empty;
}
result.Image = GetUri(result, "og:image");
result.Url = GetUri(result, "og:url");
if (validateSpecification)
{
ValidateSpecification(result);
}
return(result);
}