feat: update button (download, verify, stage)

internal/infrastructure/update/jsonJobStore.go

@@ -0,0 +1,90 @@
+package update
+
+import (
+	domain "RenewCMS/internal/domain/update"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+type JSONJobStore struct {
+	path string
+	mu   sync.Mutex
+}
+
+var _ domain.JobStore = &JSONJobStore{}
+
+func NewJSONJobStore(path string) *JSONJobStore {
+	store := &JSONJobStore{path: path}
+	store.failInterruptedJob()
+	return store
+}
+
+func (s *JSONJobStore) failInterruptedJob() {
+	job, found := s.read()
+	if !found || !job.IsRunning() {
+		return
+	}
+	job.State = domain.StateFailed
+	job.Error = domain.ErrorKindDownload
+	job.DownloadedBytes = 0
+	job.TotalBytes = 0
+	_ = s.write(job)
+}
+
+func (s *JSONJobStore) Load() (domain.Job, bool) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	job, found := s.read()
+	if !found {
+		return domain.Job{}, false
+	}
+	if job.State == domain.StateReady && !fileExists(job.StagedBinary) {
+		return domain.Job{}, false
+	}
+	return job, true
+}
+
+func (s *JSONJobStore) Save(job domain.Job) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	return s.write(job)
+}
+
+func (s *JSONJobStore) read() (domain.Job, bool) {
+	content, err := os.ReadFile(s.path)
+	if err != nil {
+		return domain.Job{}, false
+	}
+	var job domain.Job
+	if err := json.Unmarshal(content, &job); err != nil || job.State == "" {
+		return domain.Job{}, false
+	}
+	return job, true
+}
+
+func (s *JSONJobStore) write(job domain.Job) error {
+	content, err := json.Marshal(job)
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(filepath.Dir(s.path), os.ModePerm); err != nil {
+		return err
+	}
+	temporary := s.path + ".tmp"
+	if err := os.WriteFile(temporary, content, statusFilePermissions); err != nil {
+		return err
+	}
+	return os.Rename(temporary, s.path)
+}
+
+func fileExists(path string) bool {
+	if path == "" {
+		return false
+	}
+	info, err := os.Stat(path)
+	return err == nil && !info.IsDir()
+}