public static string GetAttributeValue(this HtmlNode node, MarkerAttributes markerAttribute)
{
if (null == node)
{
return(string.Empty);
}
if (MarkerAttributes.Tag == markerAttribute)
{
return(node.OriginalName);
}
return(NodeWithAttributes(node) ? node.Attributes.First(attribute => attribute.Name.ToLower() == ConvertMarkerToStringNameOfAttribute(markerAttribute)).Value : string.Empty);
}
public static bool NodeMatchesTheCondition(this HtmlNode nodeForCondition, MarkerAttributes markerAttribute, List <string> markerValues)
{
if (null == nodeForCondition)
{
return(false);
}
if (MarkerAttributes.OtherAttribute == markerAttribute)
{
return(markerValues.Any(markerValue => nodeForCondition.Attributes.Any(attribute => markerValue == attribute.Value)));
}
var attributeValue = nodeForCondition.GetAttributeValue(markerAttribute);
return(markerValues.Any(markerValue => attributeValue.Contains(markerValue)));
}
static string ConvertMarkerToStringNameOfAttribute(this MarkerAttributes markerAttribute)
{
return(markerAttribute.ToString().ToLower());
}
public static bool HasAttribute(this HtmlNode node, MarkerAttributes markerAttribute)
{
return(MarkerAttributes.OtherAttribute == markerAttribute ? node.HasAttributes : HasAttribute(node, ConvertMarkerToStringNameOfAttribute(markerAttribute)));
}
public static IEnumerable <HtmlNode> GetNodesThatMatchTheCondition(this HtmlNode node, NodeRelationships relationship, MarkerAttributes markerAttribute)
{
// TODO: refactor this!
switch (relationship)
{
case NodeRelationships.Self:
var result = node.HasAttribute(markerAttribute) ? new List <HtmlNode> {
node
} : new List <HtmlNode> {
null
};
return(result);
case NodeRelationships.Sibling:
// TODO: write better code!
return(new List <HtmlNode> {
null
});
case NodeRelationships.Parent:
return(node.ParentNode.HasAttribute(markerAttribute) ? new List <HtmlNode> {
node.ParentNode
} : new List <HtmlNode> {
null
});
case NodeRelationships.Ancestor:
return(node.Ancestors().Any(ancestor => ancestor.HasAttribute(markerAttribute))
? node.Ancestors().Where(ancestor => ancestor.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
});
case NodeRelationships.Child:
return(node.ChildNodes.Any(childNode => childNode.HasAttribute(markerAttribute))
? node.ChildNodes.Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
});
//return node.SelectNodes("*").Any(childNode => childNode.HasAttribute(markerAttribute))
// ? node.SelectNodes("*").Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
case NodeRelationships.Descendant:
//return node.Descendants().Any(descendant => descendant.HasAttribute(markerAttribute))
// ? node.Descendants().Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
var result2 = node.Descendants().Any(descendant => descendant.HasAttribute(markerAttribute))
? node.Descendants().Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
: new List <HtmlNode> {
null
};
//var result2 = node.SelectNodes("*").Any(descendant => descendant.HasAttribute(markerAttribute))
// ? node.SelectNodes("*").Where(childNode => childNode.HasAttribute(markerAttribute)).ToList()
// : new List<HtmlNode> { null };
return(result2);
default:
return(new List <HtmlNode> {
null
});
}
}
