feat: Clean up imap, imap_sync tables for disappeared folders (#5870)

src/imap/scan_folders.rs

@@ -6,6 +6,7 @@ use super::{get_folder_meaning_by_attrs, get_folder_meaning_by_name};
 use crate::config::Config;
 use crate::imap::{session::Session, Imap};
 use crate::log::LogExt;
+use crate::sql;
 use crate::tools::{self, time_elapsed};
 use crate::{context::Context, imap::FolderMeaning};
 
@@ -34,6 +35,7 @@ impl Imap {
         let watched_folders = get_watched_folders(context).await?;
 
         let mut folder_configs = BTreeMap::new();
+        let mut folder_names = Vec::new();
 
         for folder in folders {
             let folder_meaning = get_folder_meaning_by_attrs(folder.attributes());
@@ -44,6 +46,7 @@ impl Imap {
                 // already been moved and left it in the inbox.
                 continue;
             }
+            folder_names.push(folder.name().to_string());
             let folder_name_meaning = get_folder_meaning_by_name(folder.name());
 
             if let Some(config) = folder_meaning.to_config() {
@@ -101,6 +104,33 @@ impl Imap {
             }
         }
 
+        info!(context, "Found folders: {folder_names:?}.");
+        let cnt = context
+            .sql
+            .execute(
+                &format!(
+                    "DELETE FROM imap WHERE folder NOT IN ({})",
+                    sql::repeat_vars(folder_names.len()),
+                ),
+                rusqlite::params_from_iter(&folder_names),
+            )
+            .await
+            .context("Cannot delete imap rows for disappeared folders")?;
+        if cnt > 0 {
+            warn!(context, "Removed {cnt} imap rows for disappeared folders.");
+        }
+        context
+            .sql
+            .execute(
+                &format!(
+                    "DELETE FROM imap_sync WHERE folder NOT IN ({})",
+                    sql::repeat_vars(folder_names.len()),
+                ),
+                rusqlite::params_from_iter(&folder_names),
+            )
+            .await
+            .context("Cannot delete imap_sync rows for disappeared folders")?;
+
         last_scan.replace(tools::Time::now());
         Ok(true)
     }