route_params.go

// MIT License

// Copyright (c) 2020 Tree Xie

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package elton

// RouteParams tracks URL path wildcards for a request.
// Values are filled from http.Request.PathValue after ServeMux matches a route.
type RouteParams struct {
	Keys, Values []string
}

// Add appends a path parameter.
func (s *RouteParams) Add(key, value string) {
	s.Keys = append(s.Keys, key)
	s.Values = append(s.Values, value)
}

// Reset clears all parameters for pool reuse.
func (s *RouteParams) Reset() {
	s.Keys = s.Keys[:0]
	s.Values = s.Values[:0]
}

// Get returns the value for key, or "" if missing.
func (s *RouteParams) Get(key string) string {
	for i, k := range s.Keys {
		if key == k {
			return s.Values[i]
		}
	}
	return ""
}

// ToMap converts route params to map[string]string.
func (s *RouteParams) ToMap() map[string]string {
	m := make(map[string]string, len(s.Keys))
	for index, key := range s.Keys {
		m[key] = s.Values[index]
	}
	return m
}