Add saving user, add nonpersistant register login handling

http.go

@@ -16,4 +16,65 @@ func RegisterHandler(response http.ResponseWriter, request *http.Request) {
 	}
 
 	ctx := request.Context()
+
+	username := request.FormValue("username")
+	if len(username) < 4 {
+		http.Error(response, "no or short username", http.StatusBadRequest)
+		return
+	}
+
+	password := request.FormValue("password")
+	if len(password) < 8 {
+		http.Error(response, "no or short password", http.StatusBadRequest)
+		return
+	}
+
+	newClient := Client{
+		Name:         username,
+		PasswordHash: password,
+	}
+
+	err := CreateClient(ctx, &newClient)
+	if err != nil {
+		http.Error(response, "taken", http.StatusBadRequest)
+		return
+	}
+	response.Write([]byte("registered"))
+}
+
+func LoginHandler(response http.ResponseWriter, request *http.Request) {
+	if !isMethodAllowed(&response, request) {
+		return
+	}
+
+	ctx := request.Context()
+
+	username := request.FormValue("username")
+	if len(username) < 4 {
+		http.Error(response, "no or short username", http.StatusBadRequest)
+		return
+	}
+
+	password := request.FormValue("password")
+	if len(password) < 8 {
+		http.Error(response, "no or short password", http.StatusBadRequest)
+		return
+	}
+
+	id, err := GetIdFromClientName(ctx, username)
+	if err != nil {
+		http.Error(response, "bad login", http.StatusBadRequest)
+	}
+
+	err = CheckPassword(ctx, id, password)
+	if err != nil {
+		http.Error(response, "bad login", http.StatusBadRequest)
+	}
+
+	token, err := GetToken(id)
+	if err != nil {
+		http.Error(response, "Internal error", http.StatusInternalServerError)
+	}
+
+	response.Write([]byte(token))
 }