Initial DDC release

internal/jobs/restore.go

@@ -0,0 +1,51 @@
+package jobs
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"time"
+
+	"ddc/internal/files"
+)
+
+var jobIDPattern = regexp.MustCompile(`^[0-9a-f]{32}$`)
+
+func (manager *Manager) RestoreExisting() error {
+	entries, err := os.ReadDir(manager.settings.DownloadDir)
+	if err != nil {
+		return err
+	}
+
+	for _, entry := range entries {
+		if !entry.IsDir() || !jobIDPattern.MatchString(entry.Name()) {
+			continue
+		}
+		directory := filepath.Join(manager.settings.DownloadDir, entry.Name())
+		os.Remove(filepath.Join(directory, files.PartFileName))
+
+		createdAt := time.Now()
+		if info, err := entry.Info(); err == nil {
+			createdAt = info.ModTime()
+		}
+
+		job := manager.newJob(entry.Name(), directory, createdAt)
+		job.status = StatusReady
+		job.fileName = firstEntryName(directory, entry.Name())
+		manager.store(job)
+	}
+	return nil
+}
+
+func firstEntryName(directory, fallback string) string {
+	entries, err := os.ReadDir(directory)
+	if err != nil {
+		return fallback
+	}
+	for _, entry := range entries {
+		if entry.Name() != files.PartFileName {
+			return entry.Name()
+		}
+	}
+	return fallback
+}