refactor: modularize downloader architecture

remote_storage.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"os"
+	"time"
+
+	"github.com/studio-b12/gowebdav"
+)
+
+type WebDAVStorage struct{ client *gowebdav.Client }
+
+func NewWebDAVStorage(cfg Config) *WebDAVStorage {
+	c := gowebdav.NewClient(cfg.WebDAVURL, cfg.WebDAVUser, cfg.WebDAVPass)
+	c.SetTimeout(10 * time.Minute)
+	return &WebDAVStorage{client: c}
+}
+
+func (s *WebDAVStorage) MkdirAll(remoteDir string) error { return s.client.MkdirAll(remoteDir, 0755) }
+
+func (s *WebDAVStorage) ExistsSameSize(remotePath string, size int64) (bool, error) {
+	fi, err := s.client.Stat(remotePath)
+	if err != nil {
+		return false, err
+	}
+	return fi.Size() == size, nil
+}
+
+func (s *WebDAVStorage) Upload(localPath, remotePath string) error {
+	f, err := os.Open(localPath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	return s.client.WriteStream(remotePath, f, 0644)
+}
+
+func (s *WebDAVStorage) Remove(remotePath string) error { return s.client.Remove(remotePath) }
+func (s *WebDAVStorage) Stat(remotePath string) error {
+	_, err := s.client.Stat(remotePath)
+	return err
+}