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package sleepy
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
)
const (
GET = "GET"
POST = "POST"
PUT = "PUT"
DELETE = "DELETE"
)
type Resource interface {
Get(values ...url.Values) (int, interface{})
Post(values ...url.Values) (int, interface{})
Put(values ...url.Values) (int, interface{})
Delete(values ...url.Values) (int, interface{})
}
type Route struct {
resource Resource
path string
}
func (route *Route) pathMatch(path string) bool {
return route.path == path
}
type Api struct {
routes []Route
}
func (api *Api) matchResource(path string) Resource {
for _, route := range api.routes {
if route.pathMatch(path) {
return route.resource
}
}
return nil
}
func (api *Api) Abort(statusCode int) (int, interface{}) {
return statusCode, map[string]string{"error": "Aborted."}
}
type HandleFunc func(http.ResponseWriter, *http.Request)
func (api *Api) requestHandler(resource Resource) HandleFunc {
return func(rw http.ResponseWriter, request *http.Request) {
var code int
var data interface{}
var content []byte
method := request.Method
if request.ParseForm() == nil {
code, data = api.Abort(500)
}
values := request.Form
switch method {
case GET:
code, data = resource.Get(values)
case POST:
code, data = resource.Post(values)
case PUT:
code, data = resource.Put(values)
case DELETE:
code, data = resource.Delete(values)
default:
code, data = 405, map[string]string{"error": "Not implemented!"}
}
content, err := json.Marshal(data)
if err != nil {
content, _ = json.Marshal(map[string]string{"error": "Bad response."})
}
rw.WriteHeader(code)
rw.Write(content)
}
}
func (api *Api) AddResource(resource Resource, path string) {
http.HandleFunc(path, api.requestHandler(resource))
}
func (api *Api) Start(port int) {
portString := fmt.Sprintf(":%d", port)
http.ListenAndServe(portString, nil)
}
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