added a Stream struct with the meta data of a stream

main.go

@@ -20,6 +20,31 @@ type StreamURL struct {
 	URL string
 }
 
+// Stream Unexported
+type Stream struct {
+	URL                 string
+	base64              string
+	streamDirPath       string
+	previousInstantPath string
+	currentInstantPath  string
+	nextInstantPath     string
+}
+
+// NewStream Unexported
+func NewStream(URL string) Stream {
+	base64 := URLToBase64(URL)
+	streamDirPath := filepath.Join(".", "streams", base64)
+	return Stream{
+		URL:           URL,
+		base64:        base64,
+		streamDirPath: streamDirPath,
+		// Maybe make these three functions ?
+		previousInstantPath: filepath.Join(streamDirPath, "previous.jpg"),
+		currentInstantPath:  filepath.Join(streamDirPath, "current.jpg"),
+		nextInstantPath:     filepath.Join(streamDirPath, "next.jpg"),
+	}
+}
+
 func index(w http.ResponseWriter, r *http.Request) {
 	if r.FormValue("URL") == "" {
 		indexTemplate, err := template.ParseFiles(filepath.Join("templates", "index.html"))
@@ -145,7 +170,7 @@ func fileExists(path string) bool {
 	return !os.IsNotExist(err)
 }
 
-func URLToBase64(URL string) (hash string) {
+func URLToBase64(URL string) string {
 	h := sha256.New()
 	h.Write([]byte(URL))
 	return base64.URLEncoding.EncodeToString(h.Sum(nil))