fix: should return error if version is not available

internal/ota/errors.go

@@ -0,0 +1,8 @@
+package ota
+
+import "errors"
+
+var (
+	// ErrVersionNotFound is returned when the specified version is not found
+	ErrVersionNotFound = errors.New("specified version not found")
+)

internal/ota/ota.go

@@ -3,6 +3,7 @@ package ota
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -23,12 +24,14 @@ func (s *State) GetReleaseAPIEndpoint() string {
 }
 
 // getUpdateURL returns the update URL for the given parameters
-func (s *State) getUpdateURL(params UpdateParams) (string, error) {
+func (s *State) getUpdateURL(params UpdateParams) (string, error, bool) {
 	updateURL, err := url.Parse(s.releaseAPIEndpoint)
 	if err != nil {
-		return "", fmt.Errorf("error parsing update metadata URL: %w", err)
+		return "", fmt.Errorf("error parsing update metadata URL: %w", err), false
 	}
 
+	isCustomVersion := false
+
 	appTargetVersion := s.GetTargetVersion("app")
 	if appTargetVersion != "" && params.AppTargetVersion == "" {
 		params.AppTargetVersion = appTargetVersion
@@ -43,19 +46,21 @@ func (s *State) getUpdateURL(params UpdateParams) (string, error) {
 	query.Set("prerelease", fmt.Sprintf("%v", params.IncludePreRelease))
 	if params.AppTargetVersion != "" {
 		query.Set("appVersion", params.AppTargetVersion)
+		isCustomVersion = true
 	}
 	if params.SystemTargetVersion != "" {
 		query.Set("systemVersion", params.SystemTargetVersion)
+		isCustomVersion = true
 	}
 	updateURL.RawQuery = query.Encode()
 
-	return updateURL.String(), nil
+	return updateURL.String(), nil, isCustomVersion
 }
 
 func (s *State) fetchUpdateMetadata(ctx context.Context, params UpdateParams) (*UpdateMetadata, error) {
 	metadata := &UpdateMetadata{}
 
-	url, err := s.getUpdateURL(params)
+	url, err, isCustomVersion := s.getUpdateURL(params)
 	if err != nil {
 		return nil, fmt.Errorf("error getting update URL: %w", err)
 	}
@@ -77,6 +82,10 @@ func (s *State) fetchUpdateMetadata(ctx context.Context, params UpdateParams) (*
 	}
 	defer resp.Body.Close()
 
+	if isCustomVersion && resp.StatusCode == http.StatusNotFound {
+		return nil, ErrVersionNotFound
+	}
+
 	if resp.StatusCode != http.StatusOK {
 		return nil, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
 	}
@@ -189,7 +198,7 @@ func (s *State) doUpdate(ctx context.Context, params UpdateParams) error {
 
 		postRebootAction := &PostRebootAction{
 			HealthCheck: "/device/status",
-			RedirectUrl: redirectUrl,
+			RedirectTo:  redirectUrl,
 		}
 
 		if err := s.reboot(true, postRebootAction, 10*time.Second); err != nil {
@@ -241,7 +250,11 @@ func (s *State) getUpdateStatus(
 	// Get remote metadata
 	remoteMetadata, err := s.fetchUpdateMetadata(ctx, params)
 	if err != nil {
+		if err == ErrVersionNotFound || errors.Unwrap(err) == ErrVersionNotFound {
+			err = ErrVersionNotFound
+		} else {
 			err = fmt.Errorf("error checking for updates: %w", err)
+		}
 		return
 	}
 	appUpdate.url = remoteMetadata.AppURL

ota.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/Masterminds/semver/v3"
 	"github.com/jetkvm/kvm/internal/ota"
@@ -158,11 +159,15 @@ func rpcTryUpdateComponents(components tryUpdateComponents, includePreRelease bo
 
 	logger.Info().Interface("components", components).Msg("components")
 
+	currentAppTargetVersion := otaState.GetTargetVersion("app")
+	appTargetVersionChanged := currentAppTargetVersion != components.AppTargetVersion
 	updateParams.AppTargetVersion = components.AppTargetVersion
 	if err := otaState.SetTargetVersion("app", components.AppTargetVersion); err != nil {
 		return fmt.Errorf("failed to set app target version: %w", err)
 	}
 
+	currentSystemTargetVersion := otaState.GetTargetVersion("system")
+	systemTargetVersionChanged := currentSystemTargetVersion != components.SystemTargetVersion
 	updateParams.SystemTargetVersion = components.SystemTargetVersion
 	if err := otaState.SetTargetVersion("system", components.SystemTargetVersion); err != nil {
 		return fmt.Errorf("failed to set system target version: %w", err)
@@ -172,6 +177,32 @@ func rpcTryUpdateComponents(components tryUpdateComponents, includePreRelease bo
 		updateParams.Components = strings.Split(components.Components, ",")
 	}
 
+	// if it's a check only update, we don't need to try to update, we just need to check if the version is available
+	// and return the error immediately then revert the previous target versions
+	if checkOnly {
+		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+
+		_, err := otaState.GetUpdateStatus(ctx, updateParams)
+		if err == nil {
+			return nil
+		}
+
+		// revert the previous target versions
+		if appTargetVersionChanged {
+			if err := otaState.SetTargetVersion("app", currentAppTargetVersion); err != nil {
+				return fmt.Errorf("failed to revert app target version: %w", err)
+			}
+		}
+		if systemTargetVersionChanged {
+			if err := otaState.SetTargetVersion("system", currentSystemTargetVersion); err != nil {
+				return fmt.Errorf("failed to revert system target version: %w", err)
+			}
+		}
+
+		return err
+	}
+
 	go func() {
 		err := otaState.TryUpdate(context.Background(), updateParams)
 		if err != nil {

ui/src/hooks/useVersion.tsx

@@ -1,5 +1,4 @@
-import { useCallback, useMemo } from "react";
-import semver from "semver";
+import { useCallback } from "react";
 
 import { useDeviceStore } from "@/hooks/stores";
 import { JsonRpcError, RpcMethodNotFound } from "@/hooks/useJsonRpc";
@@ -69,6 +68,5 @@ export function useVersion() {
     getLocalVersion,
     appVersion,
     systemVersion,
-    isOnDevVersion,
   };
 }

ui/src/utils/jsonrpc.ts

@@ -220,7 +220,9 @@ export interface SystemVersionInfo {
   local: VersionInfo;
   remote?: VersionInfo;
   systemUpdateAvailable: boolean;
+  systemDowngradeAvailable: boolean;
   appUpdateAvailable: boolean;
+  appDowngradeAvailable: boolean;
   error?: string;
 }