Cloze notetype merges (#2912)

* Abort when trying to match notetypes of different kinds

* Skip merging templates if target is cloze

ftl/core/importing.ftl

@@ -7,6 +7,9 @@ importing-anki-files-are-from-a-very = .anki files are from a very old version o
 importing-anki2-files-are-not-directly-importable = .anki2 files are not directly importable - please import the .apkg or .zip file you have received instead.
 importing-appeared-twice-in-file = Appeared twice in file: { $val }
 importing-by-default-anki-will-detect-the = By default, Anki will detect the character between fields, such as a tab, comma, and so on. If Anki is detecting the character incorrectly, you can enter it here. Use \t to represent tab.
+importing-cannot-merge-notetypes-of-different-kinds =
+    Cloze notetypes cannot be merged with regular notetypes.
+    You may still import the file with '{ importing-merge-notetypes }' disabled.
 importing-change = Change
 importing-colon = Colon
 importing-comma = Comma

rslib/src/import_export/mod.rs

@@ -62,9 +62,14 @@ impl Note {
 pub enum ImportError {
     Corrupt,
     TooNew,
-    MediaImportFailed { info: String },
+    MediaImportFailed {
+        info: String,
+    },
     NoFieldColumn,
     EmptyFile,
+    /// Two notetypes could not be merged because one was a regular one and the
+    /// other one a cloze notetype.
+    NotetypeKindMergeConflict,
 }
 
 impl ImportError {
@@ -77,6 +82,9 @@ impl ImportError {
             }
             ImportError::NoFieldColumn => tr.importing_file_must_contain_field_column(),
             ImportError::EmptyFile => tr.importing_file_empty(),
+            ImportError::NotetypeKindMergeConflict => {
+                tr.importing_cannot_merge_notetypes_of_different_kinds()
+            }
         }
         .into()
     }

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

@@ -12,6 +12,7 @@ use super::Context;
 use super::TemplateMap;
 use crate::import_export::package::media::safe_normalized_file_name;
 use crate::import_export::package::UpdateCondition;
+use crate::import_export::ImportError;
 use crate::import_export::ImportProgress;
 use crate::import_export::NoteLog;
 use crate::notetype::ChangeNotetypeInput;
@@ -229,6 +230,10 @@ impl<'n> NoteContext<'n> {
         incoming: &mut Notetype,
         mut existing: Notetype,
     ) -> Result<()> {
+        if existing.is_cloze() != incoming.is_cloze() {
+            return Err(ImportError::NotetypeKindMergeConflict.into());
+        }
+
         let original_existing = existing.clone();
         // get and merge duplicated notetypes from previous no-merge imports
         let mut siblings = self.get_sibling_notetypes(existing.id);
@@ -367,6 +372,10 @@ impl<'n> NoteContext<'n> {
                 .get_notetype(incoming_ntid)?
                 .or_not_found(incoming_ntid)?;
 
+            if existing.is_cloze() != incoming.is_cloze() {
+                return Err(ImportError::NotetypeKindMergeConflict.into());
+            }
+
             existing.merge(&incoming);
             incoming.merge(&existing);
             self.record_remapped_ords(&incoming);

rslib/src/notetype/merge.rs

@@ -9,7 +9,9 @@ impl Notetype {
     /// Inserts not yet existing fields ands templates from `other`.
     pub(crate) fn merge(&mut self, other: &Self) {
         self.merge_fields(other);
-        self.merge_templates(other);
+        if !self.is_cloze() {
+            self.merge_templates(other);
+        }
     }
 
     pub(crate) fn merge_all<'a>(&mut self, others: impl IntoIterator<Item = &'a Self>) {