Implemented auto updating

fclauncher/app.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -11,10 +12,19 @@ import (
 	"path/filepath"
 	"runtime"
 
+	"github.com/inconshreveable/go-update"
 	wruntime "github.com/wailsapp/wails/v2/pkg/runtime"
 )
 
 const client_id string = "9305aeb8-5ecb-4e7a-b28f-c33aefcfbd8d"
+const client_version string = "0.0.1"
+
+type LauncherMetadata struct {
+	Schema_Version string
+	Version        string
+	Desc           string
+	Downloads      map[string]string
+}
 
 // App struct
 type App struct {
@@ -63,6 +73,36 @@ func openbrowser(url string) {
 }
 
 func (a *App) CheckPrerequisites() {
+	buff := new(bytes.Buffer)
+	err := HttpDownload("launcher.json", buff, nil)
+	fmt.Printf("Starting\n")
+	if err == nil {
+		data, _ := io.ReadAll(buff)
+		meta := LauncherMetadata{}
+		json.Unmarshal(data, &meta)
+		if client_version != meta.Version {
+			//Update available!
+			val, _ := wruntime.MessageDialog(a.Ctx, wruntime.MessageDialogOptions{Type: wruntime.QuestionDialog, Title: "Update!", Message: fmt.Sprintf("There is an update available:\n\n%s -> %s\n\nUpdate Description:\n\n%s\n\nWould you like to update?\n", client_version, meta.Version, meta.Desc)})
+			if val == "Yes" {
+				//run the update
+				fmt.Printf("Updating\n")
+				buff := new(bytes.Buffer)
+				HttpDownload(meta.Downloads[runtime.GOOS], buff, nil)
+				executable, _ := os.Executable()
+				err := update.Apply(buff, update.Options{})
+				if err != nil {
+					fmt.Printf("Error!")
+				}
+				child := exec.Command(executable)
+				err = child.Start()
+				if err != nil {
+					fmt.Printf("Unable to launch: %s\n", err)
+				}
+				wruntime.Quit(a.Ctx)
+			}
+		}
+	}
+
 	a.Status("Querrying Existing Instances")
 	a.Instance.SearchInstances()
 	a.Status("Pulling Modpacks")
@@ -90,7 +130,10 @@ func (a *App) CheckPrerequisites() {
 			return
 		}
 	}
-	os.Remove(filepath.Join(dir, "FCLauncher", "authentication.json"))
+	err = os.Remove(filepath.Join(dir, "FCLauncher", "authentication.json"))
+	if err != nil {
+		fmt.Printf("Unable to delete auth file\n")
+	}
 	os.MkdirAll(filepath.Join(dir, "FCLauncher"), 0755)
 	f, _ := os.OpenFile(filepath.Join(dir, "FCLauncher", "authentication.json"), os.O_CREATE|os.O_RDWR, 0755)
 	defer f.Close()

fclauncher/frontend/package.json.md5

@@ -1 +1 @@
-48cb20b8d107dab0a7876a449352234a
+ad9da3c17151b053a4d2fda8e3578901

fclauncher/go.mod

@@ -6,6 +6,8 @@ toolchain go1.23.2
 
 require github.com/wailsapp/wails/v2 v2.9.2
 
+require github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf
+
 require (
 	github.com/bep/debounce v1.2.1 // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect

fclauncher/go.sum

@@ -9,6 +9,8 @@ github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
 github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf h1:WfD7VjIE6z8dIvMsI4/s+1qr5EL+zoIGev1BQj1eoJ8=
+github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf/go.mod h1:hyb9oH7vZsitZCiBt0ZvifOrB+qc8PS5IiilCIb87rg=
 github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e h1:Q3+PugElBCf4PFpxhErSzU3/PY5sFL5Z6rfv4AbGAck=
 github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e/go.mod h1:alcuEEnZsY1WQsagKhZDsoPCRoOijYqhZvPwLG0kzVs=
 github.com/labstack/echo/v4 v4.10.2 h1:n1jAhnq/elIFTHr1EYpiYtyKgx4RW9ccVgkqByZaN2M=