params.go

package params

import (
	"context"
	"net/http"
)

type Params map[string]string

func (p Params) Get(key, fallback string) string {
	value, ok := p[key]

	if !ok {
		return fallback
	}

	return value
}

func (p Params) WithinContext(ctx context.Context) context.Context {
	return context.WithValue(ctx, paramsKey, p)
}

func FromRequest(r *http.Request) (Params, bool) {
	ctx := r.Context()

	if ctx == nil {
		return nil, false
	}

	p, ok := ctx.Value(paramsKey).(Params)

	return p, ok
}

const paramsKey = "http_params"