Add some logic so force downloading will "restart" the downloader.

source/downloader/mod.rs

@@ -108,18 +108,34 @@ pub fn download_and_save_feeds(
     }
 
     if let Some(receiver) = receiver {
-      match receiver.try_recv() {
+      let instruction = match receiver.try_recv() {
         Ok(value) => {
-          println!(
-            "[DL] Received instruction {:?} while downloading, ignoring it.",
-            value,
-          );
+          println!("[DL] Received instruction {:?} while downloading.", value,);
+          Some(value)
         }
         Err(err) => {
           if err != mpsc::TryRecvError::Empty {
             println!("[DL] Error attempting to receive from channel: {}", err);
             break;
           }
+          None
+        }
+      };
+
+      if let Some(instruction) = instruction {
+        // If we receive the force download all instruction and we're not already force downloading
+        // run this same function with force download all enabled.
+        if instruction == DownloaderInstruction::ForceDownloadAll
+          && !force_download
+        {
+          println!(
+            "[DL] Restarting the downloader with force download enabled."
+          );
+          download_and_save_feeds(&conn, true, false, Some(&receiver)).unwrap();
+          break;
+        } else {
+          // Otherwise just print that we're ignoring the instruction.
+          println!("[DL] Ignoring the {:?} instruction.", instruction);
         }
       }
     }