public override async ValueTask <Completion> WriteToAsync(TextWriter writer, TextEncoder encoder, TemplateContext context, Expression expression, FilterArgument[] args)
{
var objectValue = (await expression.EvaluateAsync(context)).ToObjectValue() as dynamic;
if (objectValue is Shape shape)
{
var arguments = (FilterArguments)(await new ArgumentsExpression(args).EvaluateAsync(context)).ToObjectValue();
if (shape.Metadata.Type == "PagerSlim")
{
foreach (var name in arguments.Names)
{
var argument = arguments[name];
var propertyName = LiquidViewFilters.LowerKebabToPascalCase(name);
if (_properties.Contains(propertyName))
{
objectValue[propertyName] = argument.ToStringValue();
}
}
}
if (shape.Metadata.Type == "PagerSlim" || shape.Metadata.Type == "Pager")
{
if (arguments.Names.Contains("item_classes"))
{
var classes = arguments["item_classes"];
if (classes.Type == FluidValues.String)
{
var values = classes.ToStringValue().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var value in values)
{
objectValue.ItemClasses.Add(value);
}
}
else if (classes.Type == FluidValues.Array)
{
foreach (var value in classes.Enumerate())
{
objectValue.ItemClasses.Add(value.ToStringValue());
}
}
}
}
}
return(Completion.Normal);
}
public override async Task <Completion> WriteToAsync(TextWriter writer, TextEncoder encoder, TemplateContext context)
{
if (!context.AmbientValues.TryGetValue("Services", out var servicesValue))
{
throw new ArgumentException("Services missing while invoking 'helper'");
}
var services = servicesValue as IServiceProvider;
if (!context.AmbientValues.TryGetValue("ViewContext", out var viewContext))
{
throw new ArgumentException("ViewContext missing while invoking 'helper'");
}
var arguments = (FilterArguments)(await _arguments.EvaluateAsync(context)).ToObjectValue();
var helper = _helper ?? arguments.At(0).ToStringValue();
var tagHelperSharedState = services.GetRequiredService <TagHelperSharedState>();
if (tagHelperSharedState.TagHelperDescriptors == null)
{
lock (tagHelperSharedState)
{
if (tagHelperSharedState.TagHelperDescriptors == null)
{
var razorEngine = services.GetRequiredService <RazorEngine>();
var tagHelperFeature = razorEngine.Features.OfType <ITagHelperFeature>().FirstOrDefault();
tagHelperSharedState.TagHelperDescriptors = tagHelperFeature.GetDescriptors().ToList();
}
}
}
if (_descriptor == null)
{
lock (this)
{
var descriptors = tagHelperSharedState.TagHelperDescriptors
.Where(d => d.TagMatchingRules.Any(rule => ((rule.TagName == "*") ||
rule.TagName == helper) && rule.Attributes.All(attr => arguments.Names.Any(name =>
{
if (String.Equals(name, attr.Name, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
name = name.Replace("_", "-");
if (attr.Name.StartsWith(AspPrefix) && String.Equals(name,
attr.Name.Substring(AspPrefix.Length), StringComparison.OrdinalIgnoreCase))
{
return(true);
}
if (String.Equals(name, attr.Name, StringComparison.OrdinalIgnoreCase))
{
return(true);
}
return(false);
}))));
_descriptor = descriptors.FirstOrDefault();
if (_descriptor == null)
{
return(Completion.Normal);
}
}
}
var tagHelperType = Type.GetType(_descriptor.Name + ", " + _descriptor.AssemblyName);
var _tagHelperActivator = _tagHelperActivators.GetOrAdd(tagHelperType, key =>
{
var genericFactory = typeof(ReusableTagHelperFactory <>).MakeGenericType(key);
var factoryMethod = genericFactory.GetMethod("CreateTagHelper");
return(Delegate.CreateDelegate(typeof(Func <ITagHelperFactory, ViewContext, ITagHelper>), factoryMethod) as Func <ITagHelperFactory, ViewContext, ITagHelper>);
});
var tagHelperFactory = services.GetRequiredService <ITagHelperFactory>();
var tagHelper = _tagHelperActivator(tagHelperFactory, (ViewContext)viewContext);
var attributes = new TagHelperAttributeList();
foreach (var name in arguments.Names)
{
var propertyName = LiquidViewFilters.LowerKebabToPascalCase(name);
var found = false;
foreach (var attribute in _descriptor.BoundAttributes)
{
if (propertyName == attribute.GetPropertyName())
{
found = true;
var setter = _tagHelperSetters.GetOrAdd(attribute.DisplayName, key =>
{
var propertyInfo = tagHelperType.GetProperty(propertyName);
var propertySetter = propertyInfo.GetSetMethod();
var invokeType = typeof(Action <,>).MakeGenericType(tagHelperType, propertyInfo.PropertyType);
var setterDelegate = Delegate.CreateDelegate(invokeType, propertySetter);
Action <ITagHelper, FluidValue> result = (h, v) =>
{
object value = null;
if (attribute.IsEnum)
{
value = Enum.Parse(propertyInfo.PropertyType, v.ToStringValue());
}
else if (attribute.IsStringProperty)
{
value = v.ToStringValue();
}
else if (propertyInfo.PropertyType == typeof(Boolean))
{
value = Convert.ToBoolean(v.ToStringValue());
}
else
{
value = v.ToObjectValue();
}
setterDelegate.DynamicInvoke(new[] { h, value });
};
return(result);
});
try
{
setter(tagHelper, arguments[name]);
}
catch (ArgumentException e)
{
throw new ArgumentException("Incorrect value type assigned to a tag.", name, e);
}
break;
}
}
if (!found)
{
attributes.Add(new TagHelperAttribute(name.Replace("_", "-"), arguments[name].ToObjectValue()));
}
}
var content = new StringWriter();
if (Statements?.Any() ?? false)
{
Completion completion = Completion.Break;
for (var index = 0; index < Statements.Count; index++)
{
completion = await Statements[index].WriteToAsync(content, encoder, context);
if (completion != Completion.Normal)
{
return(completion);
}
}
}
var tagHelperContext = new TagHelperContext(attributes,
new Dictionary <object, object>(), Guid.NewGuid().ToString("N"));
var tagHelperOutput = new TagHelperOutput(helper, attributes, (_, e)
=> Task.FromResult(new DefaultTagHelperContent().AppendHtml(content.ToString())));
tagHelperOutput.Content.AppendHtml(content.ToString());
await tagHelper.ProcessAsync(tagHelperContext, tagHelperOutput);
tagHelperOutput.WriteTo(writer, HtmlEncoder.Default);
return(Completion.Normal);
}