Integrate file access into API

api.go

@@ -2,14 +2,51 @@ package main
 
 import (
 	"encoding/json"
+	"io"
+	"log"
 	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/gorilla/mux"
 )
 
-// Return all current deployments
-func foo(w http.ResponseWriter, r *http.Request) {
+func StyleFileAccessor(filename string) styleFileAccessor {
+	file, err := os.Open(filename)
+	if err != nil {
+		log.Fatalf("Can not access style file: %s", err.Error())
+	}
+
+	return styleFileAccessor{file}
+}
+
+// Allows access to a single style file
+type styleFileAccessor struct {
+	file *os.File
+}
+
+func (fa styleFileAccessor) ListFiles(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	encoder := json.NewEncoder(w)
-	encoder.Encode(map[string]string{
-		"foo": "bar",
-	})
+	encoder.Encode([]string{filepath.Base(fa.file.Name())})
+}
+
+func (fa styleFileAccessor) ReadFile(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	_ = vars["filename"]
+
+	//TODO: Choose right file
+	// right now we just return the single file we know of
+	w.Header().Set("Content-Type", "application/json")
+	if _, err := io.Copy(w, fa.file); err != nil {
+		log.Fatalf("Can not copy from file to request: %s", err.Error())
+	}
+}
+
+func (fa styleFileAccessor) SaveFile(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+
+	if _, err := io.Copy(fa.file, r.Body); err != nil {
+		log.Fatalf("Can not copy from request to file: %s", err.Error())
+	}
 }