Improve webdav; add workers for refreshes

pkg/webdav/workers.go

@@ -0,0 +1,69 @@
+package webdav
+
+import "time"
+
+func (c *Cache) Refresh() error {
+	// For now, we just want to refresh the listing and download links
+	c.logger.Info().Msg("Starting cache refresh workers")
+	go c.refreshListingWorker()
+	go c.refreshDownloadLinksWorker()
+	go c.refreshTorrentsWorker()
+	return nil
+}
+
+func (c *Cache) refreshListingWorker() {
+	refreshTicker := time.NewTicker(10 * time.Second)
+	defer refreshTicker.Stop()
+
+	for {
+		select {
+		case <-refreshTicker.C:
+			if c.listingRefreshMu.TryLock() {
+				func() {
+					defer c.listingRefreshMu.Unlock()
+					c.refreshListings()
+				}()
+			} else {
+				c.logger.Debug().Msg("Refresh already in progress")
+			}
+		}
+	}
+}
+
+func (c *Cache) refreshDownloadLinksWorker() {
+	refreshTicker := time.NewTicker(40 * time.Minute)
+	defer refreshTicker.Stop()
+
+	for {
+		select {
+		case <-refreshTicker.C:
+			if c.downloadLinksRefreshMu.TryLock() {
+				func() {
+					defer c.downloadLinksRefreshMu.Unlock()
+					c.refreshDownloadLinks()
+				}()
+			} else {
+				c.logger.Debug().Msg("Refresh already in progress")
+			}
+		}
+	}
+}
+
+func (c *Cache) refreshTorrentsWorker() {
+	refreshTicker := time.NewTicker(5 * time.Second)
+	defer refreshTicker.Stop()
+
+	for {
+		select {
+		case <-refreshTicker.C:
+			if c.listingRefreshMu.TryLock() {
+				func() {
+					defer c.listingRefreshMu.Unlock()
+					c.refreshTorrents()
+				}()
+			} else {
+				c.logger.Debug().Msg("Refresh already in progress")
+			}
+		}
+	}
+}