Don't scan watched folders

This should fix the duplicate-messages-bug

src/imap/scan_folders.rs

@@ -30,6 +30,7 @@ impl Imap {
         let session = self.session.as_mut();
         let session = session.context("scan_folders(): IMAP No Connection established")?;
         let folders: Vec<_> = session.list(Some(""), Some("*")).await?.collect().await;
+        let watched_folders = get_watched_folders(context).await;
 
         let mut sentbox_folder = None;
         let mut spam_folder = None;
@@ -42,7 +43,15 @@ impl Imap {
                     continue;
                 }
             };
+
             let foldername = folder.name();
+            if watched_folders.contains(&foldername.to_string()) {
+                info!(
+                    context,
+                    "Not scanning folder {} as it is watched anyway", foldername
+                );
+                continue;
+            }
             info!(context, "Scanning folder: {}", foldername);
 
             let folder_meaning = get_folder_meaning(&folder);
@@ -78,3 +87,20 @@ impl Imap {
         Ok(())
     }
 }
+
+async fn get_watched_folders(context: &Context) -> Vec<String> {
+    let mut res = Vec::new();
+    let folder_watched_configured = &[
+        (Config::SentboxWatch, Config::ConfiguredSentboxFolder),
+        (Config::MvboxWatch, Config::ConfiguredMvboxFolder),
+        (Config::InboxWatch, Config::ConfiguredInboxFolder),
+    ];
+    for (watched, configured) in folder_watched_configured {
+        if context.get_config_bool(*watched).await {
+            if let Some(folder) = context.get_config(*configured).await {
+                res.push(folder);
+            }
+        }
+    }
+    res
+}