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// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: Apache-2.0
package pathrouter
import "go.xyrillian.de/gg/options"
// Element is a [Matcher] that accepts subpaths with at least one path element.
// The first path element must be equal to the given value,
// and the remaining subpath will have to be accepted by the next matcher.
func Element(value string, matcher Matcher) Matcher {
return element(value, matcher.downcast())
}
func element(value string, matcher realMatcher) Matcher {
switch value {
case "":
panic(`Element() called with value = ""`)
case "/":
value = "" // trailing slash will lead to an empty element in `path`, e.g. strings.Split("foo/bar/") == []string{"foo","bar",""}
default:
}
return realMatcher{
minLength: matcher.minLength + 1,
maxLength: options.Map(matcher.maxLength, increment),
accept: func(path []string, vars map[string]string) HandlerFunc {
if len(path) == 0 || path[0] != value {
return nil
}
return matcher.accept(path[1:], vars)
},
}
}
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