Add support for tagging + protecting fields

ftl/core/fields.ftl

@@ -20,3 +20,4 @@ fields-name-invalid-letter = The field name should not contain :, ", { "{" } or
 # If enabled, the field is not included when searching for 'text', 're:text' and so on,
 # but is when searching for a specific field, eg 'field:text'.
 fields-exclude-from-search = Exclude from unqualified searches (slower)
+fields-field-is-required = This is a required field, and can not be deleted.

proto/anki/notetypes.proto

@@ -87,6 +87,9 @@ message Notetype {
       bool exclude_from_search = 8;
       // used for merging notetypes on import (Anki 23.10)
       optional int64 id = 9;
+      // Can be used to uniquely identify required fields.
+      optional uint32 tag = 10;
+      bool prevent_deletion = 11;
 
       bytes other = 255;
     }

qt/aqt/fields.py

@@ -21,7 +21,7 @@ from aqt.utils import (
     disable_help_button,
     getOnlyText,
     openHelp,
-    showWarning,
+    show_warning,
     tooltip,
     tr,
 )
@@ -128,17 +128,17 @@ class FieldDialog(QDialog):
         if not txt:
             return None
         if txt[0] in "#^/":
-            showWarning(tr.fields_name_first_letter_not_valid())
+            show_warning(tr.fields_name_first_letter_not_valid())
             return None
         for letter in """:{"}""":
             if letter in txt:
-                showWarning(tr.fields_name_invalid_letter())
+                show_warning(tr.fields_name_invalid_letter())
                 return None
         for f in self.model["flds"]:
             if ignoreOrd is not None and f["ord"] == ignoreOrd:
                 continue
             if f["name"] == txt:
-                showWarning(tr.fields_that_field_name_is_already_used())
+                show_warning(tr.fields_that_field_name_is_already_used())
                 return None
         return txt
 
@@ -174,7 +174,11 @@ class FieldDialog(QDialog):
 
     def onDelete(self) -> None:
         if len(self.model["flds"]) < 2:
-            showWarning(tr.fields_notes_require_at_least_one_field())
+            show_warning(tr.fields_notes_require_at_least_one_field())
+            return
+        field = self.model["flds"][self.form.fieldList.currentRow()]
+        if field["preventDeletion"]:
+            show_warning(tr.fields_field_is_required())
             return
         count = self.mm.use_count(self.model)
         c = tr.browsing_note_count(count=count)
@@ -182,9 +186,8 @@ class FieldDialog(QDialog):
             return
         if not self.change_tracker.mark_schema():
             return
-        f = self.model["flds"][self.form.fieldList.currentRow()]
-        self.mm.remove_field(self.model, f)
-        gui_hooks.fields_did_delete_field(self, f)
+        self.mm.remove_field(self.model, field)
+        gui_hooks.fields_did_delete_field(self, field)
 
         self.fillFields()
         self.form.fieldList.setCurrentRow(0)

rslib/src/notetype/fields.rs

@@ -47,6 +47,8 @@ impl NoteField {
                 description: "".into(),
                 collapsed: false,
                 exclude_from_search: false,
+                tag: None,
+                prevent_deletion: false,
                 other: vec![],
             },
         }

rslib/src/notetype/schema11.rs

@@ -239,7 +239,7 @@ pub struct NoteFieldSchema11 {
     pub(crate) font: String,
     pub(crate) size: u16,
 
-    // This was not in schema 11, but needs to be listed here so that the setting is not lost
+    // These were not in schema 11, but need to be listed here so that the setting is not lost
     // on downgrade/upgrade.
     #[serde(default, deserialize_with = "default_on_invalid")]
     pub(crate) description: String,
@@ -256,6 +256,12 @@ pub struct NoteFieldSchema11 {
     #[serde(default, deserialize_with = "default_on_invalid")]
     pub(crate) id: Option<i64>,
 
+    #[serde(default, deserialize_with = "default_on_invalid")]
+    pub(crate) tag: Option<u32>,
+
+    #[serde(default, deserialize_with = "default_on_invalid")]
+    pub(crate) prevent_deletion: bool,
+
     #[serde(flatten)]
     pub(crate) other: HashMap<String, Value>,
 }
@@ -274,6 +280,8 @@ impl Default for NoteFieldSchema11 {
             collapsed: false,
             exclude_from_search: false,
             id: None,
+            tag: None,
+            prevent_deletion: false,
             other: Default::default(),
         }
     }
@@ -294,6 +302,8 @@ impl From<NoteFieldSchema11> for NoteField {
                 collapsed: f.collapsed,
                 exclude_from_search: f.exclude_from_search,
                 id: f.id,
+                tag: f.tag,
+                prevent_deletion: f.prevent_deletion,
                 other: other_to_bytes(&f.other),
             },
         }
@@ -315,6 +325,8 @@ impl From<NoteField> for NoteFieldSchema11 {
             collapsed: conf.collapsed,
             exclude_from_search: conf.exclude_from_search,
             id: conf.id,
+            tag: conf.tag,
+            prevent_deletion: conf.prevent_deletion,
             other: parse_other_fields(&conf.other, &RESERVED_FIELD_KEYS),
         }
     }
@@ -332,6 +344,8 @@ static RESERVED_FIELD_KEYS: Set<&'static str> = phf_set! {
     "description",
     "excludeFromSearch",
     "id",
+    "tag",
+    "preventDeletion",
 };
 
 #[derive(Serialize, Deserialize, Debug, Default, Clone)]