added SPM

installer.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"fmt"
+	"path/filepath"
+	"spitfire-installer/spm"
+)
+
+// Installer manages the download, decompression, and installation processes.
+type Installer struct {
+	// Progress info from SPM
+	Progress int
+	Task     string
+
+	// Internal states
+	IsDownloading bool
+	IsInstalling  bool
+	DoneDownload  bool
+	DoneInstall   bool
+	LastError     error
+
+	// Paths
+	DownloadDir string
+	TempDir     string
+}
+
+// NewInstaller creates a new Installer with initial state.
+func NewInstaller() *Installer {
+	return &Installer{}
+}
+
+// StartDownloadDecompress starts the download and decompression in a background goroutine.
+func (inst *Installer) StartDownloadDecompress() {
+	inst.IsDownloading = true
+	go func() {
+		defer func() {
+			inst.IsDownloading = false
+			inst.DoneDownload = (inst.LastError == nil)
+		}()
+
+		// Prepare download directory
+		spm.UpdateProgress(0, "Preparing to download...")
+		inst.DownloadDir = spm.GetTempDownloadDir()
+
+		// Download APPINDEX
+		appIndexPath := filepath.Join(inst.DownloadDir, "APPINDEX")
+		spm.UpdateProgress(0, "Downloading APPINDEX")
+		if err := spm.DownloadAppIndex(appIndexPath); err != nil {
+			inst.LastError = err
+			return
+		}
+
+		// Download package
+		packageName := "spitfire-browser"
+		release := "nightly"
+		spm.UpdateProgress(0, "Downloading package...")
+		if err := spm.DownloadPackageFromAppIndex(appIndexPath, packageName, release, inst.DownloadDir); err != nil {
+			inst.LastError = err
+			return
+		}
+
+		// Decompress
+		spm.UpdateProgress(0, "Decompressing...")
+		packagePath := filepath.Join(inst.DownloadDir, "browser-amd64-nightly-linux.tar.gz")
+		tempDir, err := spm.DecompressToTemp(packagePath)
+		if err != nil {
+			inst.LastError = err
+			return
+		}
+
+		inst.TempDir = tempDir
+	}()
+}
+
+// FinalInstall moves files to the final install directory in a background goroutine.
+func (inst *Installer) FinalInstall() {
+	if !inst.DoneDownload {
+		inst.LastError = fmt.Errorf("Cannot install: download and decompression are not complete")
+		return
+	}
+
+	inst.IsInstalling = true
+	go func() {
+		defer func() {
+			inst.IsInstalling = false
+			inst.DoneInstall = (inst.LastError == nil)
+		}()
+
+		// Generate default install directory
+		installDir, err := spm.GetDefaultInstallDir()
+		if err != nil {
+			inst.LastError = fmt.Errorf("failed to determine default install directory: %w", err)
+			return
+		}
+
+		if err := spm.MoveFilesToInstallDir(inst.TempDir, installDir); err != nil {
+			inst.LastError = err
+			return
+		}
+
+		spm.UpdateProgress(100, "Installation complete!")
+	}()
+}
+
+// PollProgress fetches the latest progress and task from SPM.
+func (inst *Installer) PollProgress() {
+	p, t := spm.GetProgress()
+	inst.Progress, inst.Task = p, t
+}