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package glue
import (
"fmt"
"net/http"
"sort"
"sync"
"github.com/gorilla/mux"
)
// Endpoint is a handler attached to a path.
type Endpoint struct {
Path string
Methods []string
Middleware []mux.MiddlewareFunc
Handler func(w http.ResponseWriter, r *http.Request)
}
var (
registry = map[string]Endpoint{}
registryLock sync.RWMutex
)
//////////////////////////
// Register a controller.
func Register(e Endpoint) {
registryLock.Lock()
if _, ok := registry[e.Path]; ok {
panic(fmt.Sprintf("Route Registry: path '%s' already registered", e.Path))
}
registry[e.Path] = e
registryLock.Unlock()
}
// GetControllers returns all the routes and handler functions.
func GetControllers() []Endpoint {
registryLock.RLock()
defer registryLock.RUnlock()
// Sort the endpoints by longest first.
var keys = make([]string, len(registry))
var i int
for key := range registry {
keys[i] = key
i++
}
sort.Sort(byLength(keys))
result := make([]Endpoint, len(registry))
for i, key := range keys {
result[i] = registry[key]
}
return result
}
type byLength []string
func (s byLength) Len() int {
return len(s)
}
func (s byLength) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s byLength) Less(i, j int) bool {
// Sort longest over shortest.
return len(s[j]) < len(s[i])
}