Keep source ids of imported deck configs (or skip)

rslib/src/deckconfig/undo.rs

@@ -44,6 +44,13 @@ impl Collection {
         Ok(())
     }
 
+    pub(crate) fn add_deck_config_if_unique_undoable(&mut self, config: &DeckConfig) -> Result<()> {
+        if self.storage.add_deck_conf_if_unique(config)? {
+            self.save_undo(UndoableDeckConfigChange::Added(Box::new(config.clone())));
+        }
+        Ok(())
+    }
+
     pub(super) fn update_deck_config_undoable(
         &mut self,
         config: &DeckConfig,

rslib/src/import_export/package/apkg/import.rs

@@ -41,7 +41,6 @@ struct Context<'a> {
     remapped_notes: HashMap<NoteId, NoteId>,
     existing_notes: HashSet<NoteId>,
     remapped_decks: HashMap<DeckId, DeckId>,
-    remapped_deck_configs: HashMap<DeckConfigId, DeckConfigId>,
     data: ExchangeData,
     usn: Usn,
     /// Map of source media files, that do not already exist in the target.
@@ -143,7 +142,6 @@ impl<'a> Context<'a> {
             remapped_notes: HashMap::new(),
             existing_notes,
             remapped_decks: HashMap::new(),
-            remapped_deck_configs: HashMap::new(),
             added_cards: HashSet::new(),
             used_media_entries: HashMap::new(),
             normalize_notes,
@@ -345,12 +343,10 @@ impl<'a> Context<'a> {
     }
 
     fn import_deck_configs(&mut self) -> Result<()> {
-        // TODO: keep ids if possible?
         for mut config in mem::take(&mut self.data.deck_configs) {
-            let old_id = mem::take(&mut config.id);
+            config.usn = self.usn;
             self.target_col
-                .add_deck_config_inner(&mut config, Some(self.usn))?;
-            self.remapped_deck_configs.insert(old_id, config.id);
+                .add_deck_config_if_unique_undoable(&config)?;
         }
         Ok(())
     }
@@ -361,7 +357,6 @@ impl<'a> Context<'a> {
 
         for mut deck in mem::take(&mut self.data.decks) {
             deck.maybe_reparent(&renamed_parents);
-            self.remap_deck_config_id(&mut deck)?;
             if let Some(original) = self.get_deck_by_name(&deck)? {
                 if original.is_filtered() {
                     deck.uniquify_name(&mut renamed_parents);
@@ -377,16 +372,6 @@ impl<'a> Context<'a> {
         Ok(())
     }
 
-    fn remap_deck_config_id(&mut self, deck: &mut Deck) -> Result<()> {
-        if let Some(config_id) = self
-            .remapped_deck_configs
-            .get(&DeckConfigId(deck.normal()?.config_id))
-        {
-            deck.normal_mut()?.config_id = config_id.0;
-        }
-        Ok(())
-    }
-
     fn add_deck(&mut self, deck: &mut Deck) -> Result<()> {
         let old_id = mem::take(&mut deck.id);
         self.target_col.add_deck_inner(deck, self.usn)?;

rslib/src/storage/deckconfig/add_if_unique.sql

@@ -0,0 +1,3 @@
+INSERT
+  OR IGNORE INTO deck_config (id, name, mtime_secs, usn, config)
+VALUES (?, ?, ?, ?, ?);

rslib/src/storage/deckconfig/mod.rs

@@ -67,6 +67,22 @@ impl SqliteStorage {
         Ok(())
     }
 
+    pub(crate) fn add_deck_conf_if_unique(&self, conf: &DeckConfig) -> Result<bool> {
+        let mut conf_bytes = vec![];
+        conf.inner.encode(&mut conf_bytes)?;
+        self.db
+            .prepare_cached(include_str!("add_if_unique.sql"))?
+            .execute(params![
+                conf.id,
+                conf.name,
+                conf.mtime_secs,
+                conf.usn,
+                conf_bytes,
+            ])
+            .map(|added| added == 1)
+            .map_err(Into::into)
+    }
+
     pub(crate) fn update_deck_conf(&self, conf: &DeckConfig) -> Result<()> {
         let mut conf_bytes = vec![];
         conf.inner.encode(&mut conf_bytes)?;