[FieldFormatters] Add support for {{rawValue}} in URL label template

[jughosta]

When defining a URL template, it's possible to use {{rawValue}} for unescaped value. But if {{rawValue}} is entered into Label template input, it results in missing label for the link.

Current workaround is to use {{value}} variable for the link label:

But it's confusing that {{rawValue}} variable is not available for the label template and {{value}} works as {{rawValue}}.

kibana/src/plugins/field_formats/common/converters/url.ts

Lines 80 to 99 in f388d99

	private formatLabel(value: string, url?: string): string {
	const template = this.param('labelTemplate');
	if (url == null) url = this.formatUrl(value);
	if (!template) return url;
	return this.compileTemplate(template)({
	value,
	url,
	});
	}
	private formatUrl(value: string): string {
	const template = this.param('urlTemplate');
	if (!template) return value;
	return this.compileTemplate(template)({
	value: encodeURIComponent(value),
	rawValue: value,
	});
	}

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[kowalczyk-krzysztof]

@jughosta What's the desired behavior here? From what I understand, {{value}} for label works the same as {{rawValue}} for url.

Should the current behavior be kept and an alias get added so label has both {{value}} and {{rawValue}} doing the same thing? Or should {{value}} behavior get changed (to match url perhaps?) and {{rawValue}} would replace it?

[jughosta]

Hi @kowalczyk-krzysztof,

Thanks for looking into it!

I think we can't simply change the existing behaviour for {{value}} as it would break the already configured links.

Adding support for {{rawValue}} too to use the unescaped value for the label would be great so users at least don't get surprised (as currently entering {{rawValue}} would result in no label at all).