apply backup

cmd/cli/commands/apply/apply.go

@@ -0,0 +1,69 @@
+package apply
+
+import (
+	"cloudsave/pkg/repository"
+	"cloudsave/pkg/tools/archive"
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/google/subcommands"
+)
+
+type (
+	ListCmd struct {
+	}
+)
+
+func (*ListCmd) Name() string     { return "apply" }
+func (*ListCmd) Synopsis() string { return "apply a backup" }
+func (*ListCmd) Usage() string {
+	return `apply:
+  Apply a backup
+`
+}
+
+func (p *ListCmd) SetFlags(f *flag.FlagSet) {
+}
+
+func (p *ListCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	if f.NArg() != 2 {
+		fmt.Fprintln(os.Stderr, "error: missing game ID and/or backup uuid")
+		return subcommands.ExitUsageError
+	}
+
+	gameID := f.Arg(0)
+	uuid := f.Arg(1)
+
+	g, err := repository.One(gameID)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: failed to open game metadata: %s\n", err)
+		return subcommands.ExitFailure
+	}
+
+	if err := repository.RestoreArchive(gameID, uuid); err != nil {
+		fmt.Fprintf(os.Stderr, "error: failed to restore backup: %s\n", err)
+		return subcommands.ExitFailure
+	}
+
+	if err := os.RemoveAll(g.Path); err != nil {
+		fmt.Fprintf(os.Stderr, "error: failed to remove old data: %s\n", err)
+		return subcommands.ExitFailure
+	}
+
+	file, err := os.OpenFile(filepath.Join(repository.DatastorePath(), gameID, "data.tar.gz"), os.O_RDONLY, 0)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: failed to open archive: %s\n", err)
+		return subcommands.ExitFailure
+	}
+	defer file.Close()
+
+	if err := archive.Untar(file, g.Path); err != nil {
+		fmt.Fprintf(os.Stderr, "error: failed to extract archive: %s\n", err)
+		return subcommands.ExitFailure
+	}
+
+	return subcommands.ExitSuccess
+}