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package echo
import (
"net/url"
"path"
"github.com/labstack/echo/v4"
)
// URLBuilder is used to build URLs with optional querystring arguments. This
// is used to build URLs to REST resources within handlers.
//
// This exists because the default Echo reversing logic requires handlers to
// hold references to other handlers to be able to build reverse URLs. This is
// a bad solution to an ugly problem but as the router currently stands there's
// not much that can be done about it. In the future this should go away and be
// replaced by something like named routes in echo.
type URLBuilder struct {
c echo.Context
u *url.URL
q url.Values
}
func URLFor(c echo.Context, parts ...string) *URLBuilder {
u := &url.URL{
Scheme: "http",
Host: c.Request().Host,
Path: path.Join(parts...),
}
if c.Request().TLS != nil {
u.Scheme = "https"
}
return &URLBuilder{c, u, nil}
}
func (b *URLBuilder) Query(k, v string) *URLBuilder {
if b.q == nil {
b.q = url.Values{}
}
b.q.Add(k, v)
return b
}
func (b *URLBuilder) String() string {
if b.q != nil {
b.u.RawQuery = b.q.Encode()
}
return b.u.String()
}
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