95 lines
2.7 KiB
C#
95 lines
2.7 KiB
C#
using System.Diagnostics.CodeAnalysis;
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namespace Solicitors.HtmlParsing.Models;
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internal class HtmlNode(string tagName, IHtmlAttribute[] attributes)
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: IHtmlNode
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{
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private readonly IHtmlAttribute[] _attributes = attributes;
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private readonly string _tagName = tagName;
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public virtual bool TryGetByTagName(
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string tagName,
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[NotNullWhen(true)] out IHtmlNode? node,
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bool noChildren = false)
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{
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node = null;
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if (tagName == _tagName)
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node = this;
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return node is not null;
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}
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private string[] Classes
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{
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get
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{
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var classAttribute = _attributes
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.Where(a => a is HtmlValueAttribute)
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.Select(a => (a as HtmlValueAttribute)!)
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.FirstOrDefault(a => a.Name.Equals("class", StringComparison.CurrentCultureIgnoreCase));
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return classAttribute is not null
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? classAttribute.Value.Substring(1, classAttribute.Value.Length - 2).Split(' ')
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: [];
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}
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}
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public virtual bool TryGetByClass(
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string className,
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[NotNullWhen(true)] out IHtmlNode? node,
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bool noChildren = false)
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{
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node = null;
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if (Classes.Contains(className, StringComparer.InvariantCultureIgnoreCase))
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node = this;
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return node is not null;
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}
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public virtual bool TryGetByTagNameAndClass(
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string tagName,
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string className,
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[NotNullWhen(true)] out IHtmlNode? node,
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bool noChildren = false)
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{
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node = null;
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if (tagName == _tagName && Classes.Contains(className, StringComparer.InvariantCultureIgnoreCase))
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node = this;
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return node is not null;
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}
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public virtual bool TryGetText([NotNullWhen(true)] out string? text)
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{
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text = null;
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return false;
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}
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public virtual bool TryGetChildren([NotNullWhen(true)] out IEnumerable<IHtmlNode>? children)
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{
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children = null;
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return false;
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}
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public bool HasAttribute(string attributeName)
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{
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return _attributes
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.Any(a => a.Name.Equals(attributeName, StringComparison.InvariantCultureIgnoreCase));
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}
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public bool TryGetAttributeValue(string attributeName, [NotNullWhen(true)] out string? attributeValue)
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{
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attributeValue = null;
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var matchingAttribute = _attributes.FirstOrDefault(
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a => a.Name.Equals(attributeName, StringComparison.InvariantCultureIgnoreCase)
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);
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if (matchingAttribute is HtmlValueAttribute valueAttribute)
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attributeValue = valueAttribute.Value;
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return attributeValue is not null;
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}
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} |