initial commit

models/store.go

@@ -0,0 +1,93 @@
+package models
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+var (
+	mu      sync.RWMutex
+	cfg     *AppConfig
+	cfgPath string
+)
+
+func init() {
+	cfgPath = resolveCfgPath()
+	hostname, _ := os.Hostname()
+	cfg = &AppConfig{
+		Node: NodeInfo{
+			Hostname:      hostname,
+			UpdateHistory: []UpdateRecord{},
+			Backup: BackupConfig{
+				Targets: []BackupTarget{},
+				History: []BackupExecution{},
+			},
+		},
+		Nodes:    []RemoteNode{},
+		Services: []Service{},
+	}
+	if data, err := os.ReadFile(cfgPath); err == nil {
+		_ = json.Unmarshal(data, cfg)
+	}
+	ensureSlices()
+}
+
+func ensureSlices() {
+	if cfg.Node.UpdateHistory == nil {
+		cfg.Node.UpdateHistory = []UpdateRecord{}
+	}
+	if cfg.Node.Backup.Targets == nil {
+		cfg.Node.Backup.Targets = []BackupTarget{}
+	}
+	if cfg.Node.Backup.History == nil {
+		cfg.Node.Backup.History = []BackupExecution{}
+	}
+	if cfg.Nodes == nil {
+		cfg.Nodes = []RemoteNode{}
+	}
+	if cfg.Services == nil {
+		cfg.Services = []Service{}
+	}
+}
+
+func resolveCfgPath() string {
+	const etcPath = "/etc/nodemaster/nodemaster.conf"
+	if err := os.MkdirAll(filepath.Dir(etcPath), 0755); err == nil {
+		if f, err := os.OpenFile(etcPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600); err == nil {
+			f.Close()
+			return etcPath
+		}
+	}
+	home, err := os.UserHomeDir()
+	if err != nil {
+		home = "."
+	}
+	return filepath.Join(home, ".nodemaster.conf")
+}
+
+func persist() error {
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(filepath.Dir(cfgPath), 0755); err != nil {
+		return fmt.Errorf("mkdir: %w", err)
+	}
+	// 0600: the config now embeds the restic repository password, so it must
+	// not be group/world-readable. Chmod covers pre-existing files that were
+	// created before this field existed (WriteFile's mode only applies on
+	// create, not to files that already exist with looser permissions).
+	if err := os.WriteFile(cfgPath, data, 0600); err != nil {
+		return err
+	}
+	_ = os.Chmod(cfgPath, 0600)
+	return nil
+}
+
+// ConfigPath returns the resolved config file path.
+func ConfigPath() string {
+	return cfgPath
+}