add some endpoints

handler/handler.go

@@ -1,13 +1,58 @@
 package handler
 
 import (
+	"encoding/json"
+	"encoding/xml"
+	"fmt"
+	"log"
+	"net/http"
+
 	"github.com/jinzhu/gorm"
-	"github.com/labstack/echo"
+	"github.com/sentriz/gonic/subsonic"
 )
 
-// Handler is passed to the handler functions so
-// they can access the database
-type Handler struct {
-	DB     *gorm.DB
-	Router *echo.Echo
+type Controller struct {
+	DB *gorm.DB
+}
+
+func respondRaw(w http.ResponseWriter, r *http.Request, code int, sub *subsonic.Response) {
+	format := r.URL.Query().Get("f")
+	switch format {
+	case "json":
+		w.Header().Set("Content-Type", "application/json")
+		data, err := json.Marshal(sub)
+		if err != nil {
+			log.Printf("could not marshall to json: %v\n", err)
+		}
+		w.Write([]byte(`{"subsonic-response":`))
+		w.Write(data)
+		w.Write([]byte("}"))
+	case "jsonp":
+		w.Header().Set("Content-Type", "application/javascript")
+		data, err := json.Marshal(sub)
+		if err != nil {
+			log.Printf("could not marshall to json: %v\n", err)
+		}
+		callback := r.URL.Query().Get("callback")
+		w.Write([]byte(fmt.Sprintf("%s(", callback)))
+		w.Write(data)
+		w.Write([]byte(");"))
+	default:
+		w.Header().Set("Content-Type", "application/xml")
+		data, err := xml.Marshal(sub)
+		if err != nil {
+			log.Printf("could not marshall to xml: %v\n", err)
+		}
+		w.Write(data)
+	}
+}
+
+func respond(w http.ResponseWriter, r *http.Request, sub *subsonic.Response) {
+	respondRaw(w, r, http.StatusOK, sub)
+}
+
+func respondError(w http.ResponseWriter, r *http.Request, code uint64, message string) {
+	respondRaw(w, r, http.StatusBadRequest, subsonic.NewError(
+		code, message,
+	))
 }