47 lines
965 B
Go
47 lines
965 B
Go
// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
|
|
package resource
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net/url"
|
|
)
|
|
|
|
var (
|
|
ErrUnknownResourceType = errors.New("Unknown resource type")
|
|
ResourceTypes *Types = NewTypes()
|
|
)
|
|
|
|
type TypeFactory func(*url.URL) Resource
|
|
|
|
type Types struct {
|
|
registry map[string]TypeFactory
|
|
}
|
|
|
|
func NewTypes() *Types {
|
|
return &Types{ registry: make(map[string]TypeFactory) }
|
|
}
|
|
|
|
func (t *Types) Register(name string, factory TypeFactory) {
|
|
t.registry[name] = factory
|
|
}
|
|
|
|
func (t *Types) New(uri string) (Resource, error) {
|
|
u,e := url.Parse(uri)
|
|
if u == nil || e != nil {
|
|
return nil, fmt.Errorf("%w: %s", ErrUnknownResourceType, e)
|
|
}
|
|
|
|
if r,ok := t.registry[u.Scheme]; ok {
|
|
return r(u), nil
|
|
}
|
|
return nil, fmt.Errorf("%w: %s", ErrUnknownResourceType, u.Scheme)
|
|
}
|
|
|
|
func (t *Types) Has(typename string) bool {
|
|
if _,ok := t.registry[typename]; ok {
|
|
return true
|
|
}
|
|
return false
|
|
}
|